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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /js/src/jit/mips-shared | |
| parent | Initial commit. (diff) | |
| download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/jit/mips-shared')
18 files changed, 14053 insertions, 0 deletions
diff --git a/js/src/jit/mips-shared/Architecture-mips-shared.cpp b/js/src/jit/mips-shared/Architecture-mips-shared.cpp new file mode 100644 index 0000000000..fb28b298ea --- /dev/null +++ b/js/src/jit/mips-shared/Architecture-mips-shared.cpp @@ -0,0 +1,121 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/mips-shared/Architecture-mips-shared.h" + +#include <fcntl.h> +#include <unistd.h> + +#include "jit/FlushICache.h" // js::jit::FlushICache +#include "jit/mips32/Simulator-mips32.h" +#include "jit/mips64/Simulator-mips64.h" +#include "jit/RegisterSets.h" + +#if defined(__linux__) && !defined(JS_SIMULATOR) +# include <sys/cachectl.h> +#endif + +#define HWCAP_MIPS (1 << 28) +#define HWCAP_LOONGSON (1 << 27) +#define HWCAP_R2 (1 << 26) +#define HWCAP_FPU (1 << 0) + +namespace js { +namespace jit { + +static uint32_t get_mips_flags() { + uint32_t flags = HWCAP_MIPS; + +#if defined(JS_SIMULATOR_MIPS32) || defined(JS_SIMULATOR_MIPS64) + flags |= HWCAP_FPU; + flags |= HWCAP_R2; +#else +# ifdef __linux__ + FILE* fp = fopen("/proc/cpuinfo", "r"); + if (!fp) { + return flags; + } + + char buf[1024] = {}; + (void)fread(buf, sizeof(char), sizeof(buf) - 1, fp); + fclose(fp); + if (strstr(buf, "FPU")) { + flags |= HWCAP_FPU; + } + if (strstr(buf, "Loongson")) { + flags |= HWCAP_LOONGSON; + } + if (strstr(buf, "mips32r2") || strstr(buf, "mips64r2")) { + flags |= HWCAP_R2; + } +# endif +#endif // JS_SIMULATOR_MIPS32 || JS_SIMULATOR_MIPS64 + return flags; +} + +static bool check_fpu() { return mips_private::Flags & HWCAP_FPU; } + +static bool check_loongson() { return mips_private::Flags & HWCAP_LOONGSON; } + +static bool check_r2() { return mips_private::Flags & HWCAP_R2; } + +namespace mips_private { +// Cache a local copy so we only have to read /proc/cpuinfo once. +uint32_t Flags = get_mips_flags(); +bool hasFPU = check_fpu(); +; +bool isLoongson = check_loongson(); +bool hasR2 = check_r2(); +} // namespace mips_private + +bool CPUFlagsHaveBeenComputed() { + // Flags were computed above. + return true; +} + +Registers::Code Registers::FromName(const char* name) { + for (size_t i = 0; i < Total; i++) { + if (strcmp(GetName(i), name) == 0) { + return Code(i); + } + } + + return Invalid; +} + +void FlushICache(void* code, size_t size) { +#if defined(JS_SIMULATOR) + js::jit::SimulatorProcess::FlushICache(code, size); + +#elif defined(_MIPS_ARCH_LOONGSON3A) + // On Loongson3-CPUs, The cache flushed automatically + // by hardware. Just need to execute an instruction hazard. + uintptr_t tmp; + asm volatile( + ".set push \n" + ".set noreorder \n" + "move %[tmp], $ra \n" + "bal 1f \n" + "daddiu $ra, 8 \n" + "1: \n" + "jr.hb $ra \n" + "move $ra, %[tmp] \n" + ".set pop\n" + : [tmp] "=&r"(tmp)); + +#elif defined(__GNUC__) + intptr_t end = reinterpret_cast<intptr_t>(code) + size; + __builtin___clear_cache(reinterpret_cast<char*>(code), + reinterpret_cast<char*>(end)); + +#else + _flush_cache(reinterpret_cast<char*>(code), size, BCACHE); + +#endif +} + +} // namespace jit +} // namespace js diff --git a/js/src/jit/mips-shared/Architecture-mips-shared.h b/js/src/jit/mips-shared/Architecture-mips-shared.h new file mode 100644 index 0000000000..1749a2fe6c --- /dev/null +++ b/js/src/jit/mips-shared/Architecture-mips-shared.h @@ -0,0 +1,341 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_Architecture_mips_shared_h +#define jit_mips_shared_Architecture_mips_shared_h + +#include "mozilla/MathAlgorithms.h" + +#include <algorithm> +#include <limits.h> +#include <stdint.h> + +#include "jit/shared/Architecture-shared.h" + +#include "js/Utility.h" + +// gcc appears to use _mips_hard_float to denote +// that the target is a hard-float target. +#ifdef _mips_hard_float +# define JS_CODEGEN_MIPS_HARDFP +#endif + +#if (defined(_MIPS_SIM) && (_MIPS_SIM == _ABIO32)) || \ + defined(JS_SIMULATOR_MIPS32) +# define USES_O32_ABI +#elif (defined(_MIPS_SIM) && (_MIPS_SIM == _ABI64)) || \ + defined(JS_SIMULATOR_MIPS64) +# define USES_N64_ABI +#else +# error "Unsupported ABI" +#endif + +#if (defined(__mips_isa_rev) && (__mips_isa_rev >= 6)) +# define MIPSR6 +#endif + +namespace js { +namespace jit { + +// How far forward/back can a jump go? Provide a generous buffer for thunks. +static const uint32_t JumpImmediateRange = UINT32_MAX; + +class Registers { + public: + enum RegisterID { + r0 = 0, + r1, + r2, + r3, + r4, + r5, + r6, + r7, + r8, + r9, + r10, + r11, + r12, + r13, + r14, + r15, + r16, + r17, + r18, + r19, + r20, + r21, + r22, + r23, + r24, + r25, + r26, + r27, + r28, + r29, + r30, + r31, + zero = r0, + at = r1, + v0 = r2, + v1 = r3, + a0 = r4, + a1 = r5, + a2 = r6, + a3 = r7, +#if defined(USES_O32_ABI) + t0 = r8, + t1 = r9, + t2 = r10, + t3 = r11, + t4 = r12, + t5 = r13, + t6 = r14, + t7 = r15, + ta0 = t4, + ta1 = t5, + ta2 = t6, + ta3 = t7, +#elif defined(USES_N64_ABI) + a4 = r8, + a5 = r9, + a6 = r10, + a7 = r11, + t0 = r12, + t1 = r13, + t2 = r14, + t3 = r15, + ta0 = a4, + ta1 = a5, + ta2 = a6, + ta3 = a7, +#endif + s0 = r16, + s1 = r17, + s2 = r18, + s3 = r19, + s4 = r20, + s5 = r21, + s6 = r22, + s7 = r23, + t8 = r24, + t9 = r25, + k0 = r26, + k1 = r27, + gp = r28, + sp = r29, + fp = r30, + ra = r31, + invalid_reg + }; + typedef uint8_t Code; + typedef RegisterID Encoding; + + // Content spilled during bailouts. + union RegisterContent { + uintptr_t r; + }; + + static const char* const RegNames[]; + static const char* GetName(Code code) { + MOZ_ASSERT(code < Total); + return RegNames[code]; + } + static const char* GetName(Encoding i) { return GetName(Code(i)); } + + static Code FromName(const char* name); + + static const Encoding StackPointer = sp; + static const Encoding Invalid = invalid_reg; + + static const uint32_t Total = 32; + static const uint32_t Allocatable; + + typedef uint32_t SetType; + static const SetType AllMask = 0xffffffff; + static const SetType SharedArgRegMask = + (1 << a0) | (1 << a1) | (1 << a2) | (1 << a3); + static const SetType ArgRegMask; + + static const SetType VolatileMask = + (1 << Registers::v0) | (1 << Registers::v1) | (1 << Registers::a0) | + (1 << Registers::a1) | (1 << Registers::a2) | (1 << Registers::a3) | + (1 << Registers::t0) | (1 << Registers::t1) | (1 << Registers::t2) | + (1 << Registers::t3) | (1 << Registers::ta0) | (1 << Registers::ta1) | + (1 << Registers::ta2) | (1 << Registers::ta3); + + // We use this constant to save registers when entering functions. This + // is why $ra is added here even though it is not "Non Volatile". + static const SetType NonVolatileMask = + (1 << Registers::s0) | (1 << Registers::s1) | (1 << Registers::s2) | + (1 << Registers::s3) | (1 << Registers::s4) | (1 << Registers::s5) | + (1 << Registers::s6) | (1 << Registers::s7) | (1 << Registers::fp) | + (1 << Registers::ra); + + static const SetType WrapperMask = VolatileMask | // = arguments + (1 << Registers::t0) | // = outReg + (1 << Registers::t1); // = argBase + + static const SetType NonAllocatableMask = + (1 << Registers::zero) | (1 << Registers::at) | // at = scratch + (1 << Registers::t8) | // t8 = scratch + (1 << Registers::t9) | // t9 = scratch + (1 << Registers::k0) | (1 << Registers::k1) | (1 << Registers::gp) | + (1 << Registers::sp) | (1 << Registers::ra) | (1 << Registers::fp); + + // Registers returned from a JS -> JS call. + static const SetType JSCallMask; + + // Registers returned from a JS -> C call. + static const SetType SharedCallMask = (1 << Registers::v0); + static const SetType CallMask; + + static const SetType AllocatableMask = AllMask & ~NonAllocatableMask; + + static uint32_t SetSize(SetType x) { + static_assert(sizeof(SetType) == 4, "SetType must be 32 bits"); + return mozilla::CountPopulation32(x); + } + static uint32_t FirstBit(SetType x) { + return mozilla::CountTrailingZeroes32(x); + } + static uint32_t LastBit(SetType x) { + return 31 - mozilla::CountLeadingZeroes32(x); + } +}; + +// Smallest integer type that can hold a register bitmask. +typedef uint32_t PackedRegisterMask; + +class FloatRegistersMIPSShared { + public: + enum FPRegisterID { + f0 = 0, + f1, + f2, + f3, + f4, + f5, + f6, + f7, + f8, + f9, + f10, + f11, + f12, + f13, + f14, + f15, + f16, + f17, + f18, + f19, + f20, + f21, + f22, + f23, + f24, + f25, + f26, + f27, + f28, + f29, + f30, + f31, + invalid_freg + }; + typedef uint32_t Code; + typedef FPRegisterID Encoding; + + // Content spilled during bailouts. + union RegisterContent { + double d; + }; + + static const char* GetName(Encoding code) { + static const char* const Names[] = { + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31"}; + return Names[code]; + } + + static const Encoding Invalid = invalid_freg; + +#if defined(JS_CODEGEN_MIPS32) + typedef uint32_t SetType; +#elif defined(JS_CODEGEN_MIPS64) + typedef uint64_t SetType; +#endif +}; + +static const uint32_t SpillSlotSize = + std::max(sizeof(Registers::RegisterContent), + sizeof(FloatRegistersMIPSShared::RegisterContent)); + +template <typename T> +class TypedRegisterSet; + +class FloatRegisterMIPSShared { + public: + bool isSimd128() const { return false; } + + typedef FloatRegistersMIPSShared::SetType SetType; + +#if defined(JS_CODEGEN_MIPS32) + static uint32_t SetSize(SetType x) { + static_assert(sizeof(SetType) == 4, "SetType must be 32 bits"); + return mozilla::CountPopulation32(x); + } + static uint32_t FirstBit(SetType x) { + static_assert(sizeof(SetType) == 4, "SetType must be 32 bits"); + return mozilla::CountTrailingZeroes32(x); + } + static uint32_t LastBit(SetType x) { + static_assert(sizeof(SetType) == 4, "SetType must be 32 bits"); + return 31 - mozilla::CountLeadingZeroes32(x); + } +#elif defined(JS_CODEGEN_MIPS64) + static uint32_t SetSize(SetType x) { + static_assert(sizeof(SetType) == 8, "SetType must be 64 bits"); + return mozilla::CountPopulation64(x); + } + static uint32_t FirstBit(SetType x) { + static_assert(sizeof(SetType) == 8, "SetType must be 64 bits"); + return mozilla::CountTrailingZeroes64(x); + } + static uint32_t LastBit(SetType x) { + static_assert(sizeof(SetType) == 8, "SetType must be 64 bits"); + return 63 - mozilla::CountLeadingZeroes64(x); + } +#endif +}; + +namespace mips_private { +extern uint32_t Flags; +extern bool hasFPU; +extern bool isLoongson; +extern bool hasR2; +} // namespace mips_private + +inline uint32_t GetMIPSFlags() { return mips_private::Flags; } +inline bool hasFPU() { return mips_private::hasFPU; } +inline bool isLoongson() { return mips_private::isLoongson; } +inline bool hasR2() { return mips_private::hasR2; } + +// MIPS doesn't have double registers that can NOT be treated as float32. +inline bool hasUnaliasedDouble() { return false; } + +// MIPS64 doesn't support it and on MIPS32 we don't allocate odd single fp +// registers thus not exposing multi aliasing to the jit. +// See comments in Arhitecture-mips32.h. +inline bool hasMultiAlias() { return false; } + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_Architecture_mips_shared_h */ diff --git a/js/src/jit/mips-shared/Assembler-mips-shared.cpp b/js/src/jit/mips-shared/Assembler-mips-shared.cpp new file mode 100644 index 0000000000..11f834c3c7 --- /dev/null +++ b/js/src/jit/mips-shared/Assembler-mips-shared.cpp @@ -0,0 +1,2094 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/mips-shared/Assembler-mips-shared.h" + +#include "mozilla/DebugOnly.h" +#include "mozilla/MathAlgorithms.h" + +#include "gc/Marking.h" +#include "jit/ExecutableAllocator.h" +#include "vm/Realm.h" + +using mozilla::DebugOnly; + +using namespace js; +using namespace js::jit; + +// Encode a standard register when it is being used as rd, the rs, and +// an extra register(rt). These should never be called with an InvalidReg. +uint32_t js::jit::RS(Register r) { + MOZ_ASSERT((r.code() & ~RegMask) == 0); + return r.code() << RSShift; +} + +uint32_t js::jit::RT(Register r) { + MOZ_ASSERT((r.code() & ~RegMask) == 0); + return r.code() << RTShift; +} + +uint32_t js::jit::RD(Register r) { + MOZ_ASSERT((r.code() & ~RegMask) == 0); + return r.code() << RDShift; +} + +uint32_t js::jit::RZ(Register r) { + MOZ_ASSERT((r.code() & ~RegMask) == 0); + return r.code() << RZShift; +} + +uint32_t js::jit::SA(uint32_t value) { + MOZ_ASSERT(value < 32); + return value << SAShift; +} + +uint32_t js::jit::FS(uint32_t value) { + MOZ_ASSERT(value < 32); + return value << FSShift; +} + +Register js::jit::toRS(Instruction& i) { + return Register::FromCode((i.encode() & RSMask) >> RSShift); +} + +Register js::jit::toRT(Instruction& i) { + return Register::FromCode((i.encode() & RTMask) >> RTShift); +} + +Register js::jit::toRD(Instruction& i) { + return Register::FromCode((i.encode() & RDMask) >> RDShift); +} + +Register js::jit::toR(Instruction& i) { + return Register::FromCode(i.encode() & RegMask); +} + +void InstImm::extractImm16(BOffImm16* dest) { *dest = BOffImm16(*this); } + +void AssemblerMIPSShared::finish() { + MOZ_ASSERT(!isFinished); + isFinished = true; +} + +bool AssemblerMIPSShared::appendRawCode(const uint8_t* code, size_t numBytes) { + return m_buffer.appendRawCode(code, numBytes); +} + +bool AssemblerMIPSShared::reserve(size_t size) { + // This buffer uses fixed-size chunks so there's no point in reserving + // now vs. on-demand. + return !oom(); +} + +bool AssemblerMIPSShared::swapBuffer(wasm::Bytes& bytes) { + // For now, specialize to the one use case. As long as wasm::Bytes is a + // Vector, not a linked-list of chunks, there's not much we can do other + // than copy. + MOZ_ASSERT(bytes.empty()); + if (!bytes.resize(bytesNeeded())) { + return false; + } + m_buffer.executableCopy(bytes.begin()); + return true; +} + +void AssemblerMIPSShared::copyJumpRelocationTable(uint8_t* dest) { + if (jumpRelocations_.length()) { + memcpy(dest, jumpRelocations_.buffer(), jumpRelocations_.length()); + } +} + +void AssemblerMIPSShared::copyDataRelocationTable(uint8_t* dest) { + if (dataRelocations_.length()) { + memcpy(dest, dataRelocations_.buffer(), dataRelocations_.length()); + } +} + +AssemblerMIPSShared::Condition AssemblerMIPSShared::InvertCondition( + Condition cond) { + switch (cond) { + case Equal: + return NotEqual; + case NotEqual: + return Equal; + case Zero: + return NonZero; + case NonZero: + return Zero; + case LessThan: + return GreaterThanOrEqual; + case LessThanOrEqual: + return GreaterThan; + case GreaterThan: + return LessThanOrEqual; + case GreaterThanOrEqual: + return LessThan; + case Above: + return BelowOrEqual; + case AboveOrEqual: + return Below; + case Below: + return AboveOrEqual; + case BelowOrEqual: + return Above; + case Signed: + return NotSigned; + case NotSigned: + return Signed; + default: + MOZ_CRASH("unexpected condition"); + } +} + +AssemblerMIPSShared::DoubleCondition AssemblerMIPSShared::InvertCondition( + DoubleCondition cond) { + switch (cond) { + case DoubleOrdered: + return DoubleUnordered; + case DoubleEqual: + return DoubleNotEqualOrUnordered; + case DoubleNotEqual: + return DoubleEqualOrUnordered; + case DoubleGreaterThan: + return DoubleLessThanOrEqualOrUnordered; + case DoubleGreaterThanOrEqual: + return DoubleLessThanOrUnordered; + case DoubleLessThan: + return DoubleGreaterThanOrEqualOrUnordered; + case DoubleLessThanOrEqual: + return DoubleGreaterThanOrUnordered; + case DoubleUnordered: + return DoubleOrdered; + case DoubleEqualOrUnordered: + return DoubleNotEqual; + case DoubleNotEqualOrUnordered: + return DoubleEqual; + case DoubleGreaterThanOrUnordered: + return DoubleLessThanOrEqual; + case DoubleGreaterThanOrEqualOrUnordered: + return DoubleLessThan; + case DoubleLessThanOrUnordered: + return DoubleGreaterThanOrEqual; + case DoubleLessThanOrEqualOrUnordered: + return DoubleGreaterThan; + default: + MOZ_CRASH("unexpected condition"); + } +} + +BOffImm16::BOffImm16(InstImm inst) : data(inst.encode() & Imm16Mask) {} + +Instruction* BOffImm16::getDest(Instruction* src) const { + return &src[(((int32_t)data << 16) >> 16) + 1]; +} + +bool AssemblerMIPSShared::oom() const { + return AssemblerShared::oom() || m_buffer.oom() || jumpRelocations_.oom() || + dataRelocations_.oom(); +} + +// Size of the instruction stream, in bytes. +size_t AssemblerMIPSShared::size() const { return m_buffer.size(); } + +// Size of the relocation table, in bytes. +size_t AssemblerMIPSShared::jumpRelocationTableBytes() const { + return jumpRelocations_.length(); +} + +size_t AssemblerMIPSShared::dataRelocationTableBytes() const { + return dataRelocations_.length(); +} + +// Size of the data table, in bytes. +size_t AssemblerMIPSShared::bytesNeeded() const { + return size() + jumpRelocationTableBytes() + dataRelocationTableBytes(); +} + +// write a blob of binary into the instruction stream +BufferOffset AssemblerMIPSShared::writeInst(uint32_t x, uint32_t* dest) { + MOZ_ASSERT(hasCreator()); + if (dest == nullptr) { + return m_buffer.putInt(x); + } + + WriteInstStatic(x, dest); + return BufferOffset(); +} + +void AssemblerMIPSShared::WriteInstStatic(uint32_t x, uint32_t* dest) { + MOZ_ASSERT(dest != nullptr); + *dest = x; +} + +BufferOffset AssemblerMIPSShared::haltingAlign(int alignment) { + // TODO: Implement a proper halting align. + return nopAlign(alignment); +} + +BufferOffset AssemblerMIPSShared::nopAlign(int alignment) { + BufferOffset ret; + MOZ_ASSERT(m_buffer.isAligned(4)); + if (alignment == 8) { + if (!m_buffer.isAligned(alignment)) { + BufferOffset tmp = as_nop(); + if (!ret.assigned()) { + ret = tmp; + } + } + } else { + MOZ_ASSERT((alignment & (alignment - 1)) == 0); + while (size() & (alignment - 1)) { + BufferOffset tmp = as_nop(); + if (!ret.assigned()) { + ret = tmp; + } + } + } + return ret; +} + +BufferOffset AssemblerMIPSShared::as_nop() { + spew("nop"); + return writeInst(op_special | ff_sll); +} + +// Logical operations. +BufferOffset AssemblerMIPSShared::as_and(Register rd, Register rs, + Register rt) { + spew("and %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_and).encode()); +} + +BufferOffset AssemblerMIPSShared::as_or(Register rd, Register rs, Register rt) { + spew("or %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_or).encode()); +} + +BufferOffset AssemblerMIPSShared::as_xor(Register rd, Register rs, + Register rt) { + spew("xor %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_xor).encode()); +} + +BufferOffset AssemblerMIPSShared::as_nor(Register rd, Register rs, + Register rt) { + spew("nor %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_nor).encode()); +} + +BufferOffset AssemblerMIPSShared::as_andi(Register rd, Register rs, int32_t j) { + MOZ_ASSERT(Imm16::IsInUnsignedRange(j)); + spew("andi %3s,%3s,0x%x", rd.name(), rs.name(), j); + return writeInst(InstImm(op_andi, rs, rd, Imm16(j)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ori(Register rd, Register rs, int32_t j) { + MOZ_ASSERT(Imm16::IsInUnsignedRange(j)); + spew("ori %3s,%3s,0x%x", rd.name(), rs.name(), j); + return writeInst(InstImm(op_ori, rs, rd, Imm16(j)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_xori(Register rd, Register rs, int32_t j) { + MOZ_ASSERT(Imm16::IsInUnsignedRange(j)); + spew("xori %3s,%3s,0x%x", rd.name(), rs.name(), j); + return writeInst(InstImm(op_xori, rs, rd, Imm16(j)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lui(Register rd, int32_t j) { + MOZ_ASSERT(Imm16::IsInUnsignedRange(j)); + spew("lui %3s,0x%x", rd.name(), j); + return writeInst(InstImm(op_lui, zero, rd, Imm16(j)).encode()); +} + +// Branch and jump instructions +BufferOffset AssemblerMIPSShared::as_bal(BOffImm16 off) { + spew("bal %d", off.decode()); + BufferOffset bo = + writeInst(InstImm(op_regimm, zero, rt_bgezal, off).encode()); + return bo; +} + +BufferOffset AssemblerMIPSShared::as_b(BOffImm16 off) { + spew("b %d", off.decode()); + BufferOffset bo = writeInst(InstImm(op_beq, zero, zero, off).encode()); + return bo; +} + +InstImm AssemblerMIPSShared::getBranchCode(JumpOrCall jumpOrCall) { + if (jumpOrCall == BranchIsCall) { + return InstImm(op_regimm, zero, rt_bgezal, BOffImm16(0)); + } + + return InstImm(op_beq, zero, zero, BOffImm16(0)); +} + +InstImm AssemblerMIPSShared::getBranchCode(Register s, Register t, + Condition c) { + MOZ_ASSERT(c == AssemblerMIPSShared::Equal || + c == AssemblerMIPSShared::NotEqual); + return InstImm(c == AssemblerMIPSShared::Equal ? op_beq : op_bne, s, t, + BOffImm16(0)); +} + +InstImm AssemblerMIPSShared::getBranchCode(Register s, Condition c) { + switch (c) { + case AssemblerMIPSShared::Equal: + case AssemblerMIPSShared::Zero: + case AssemblerMIPSShared::BelowOrEqual: + return InstImm(op_beq, s, zero, BOffImm16(0)); + case AssemblerMIPSShared::NotEqual: + case AssemblerMIPSShared::NonZero: + case AssemblerMIPSShared::Above: + return InstImm(op_bne, s, zero, BOffImm16(0)); + case AssemblerMIPSShared::GreaterThan: + return InstImm(op_bgtz, s, zero, BOffImm16(0)); + case AssemblerMIPSShared::GreaterThanOrEqual: + case AssemblerMIPSShared::NotSigned: + return InstImm(op_regimm, s, rt_bgez, BOffImm16(0)); + case AssemblerMIPSShared::LessThan: + case AssemblerMIPSShared::Signed: + return InstImm(op_regimm, s, rt_bltz, BOffImm16(0)); + case AssemblerMIPSShared::LessThanOrEqual: + return InstImm(op_blez, s, zero, BOffImm16(0)); + default: + MOZ_CRASH("Condition not supported."); + } +} + +InstImm AssemblerMIPSShared::getBranchCode(FloatTestKind testKind, + FPConditionBit fcc) { + MOZ_ASSERT(!(fcc && FccMask)); +#ifdef MIPSR6 + RSField rsField = ((testKind == TestForTrue ? rs_t : rs_f)); + + return InstImm(op_cop1, rsField, FloatRegisters::f24 << 16, BOffImm16(0)); +#else + uint32_t rtField = ((testKind == TestForTrue ? 1 : 0) | (fcc << FccShift)) + << RTShift; + + return InstImm(op_cop1, rs_bc1, rtField, BOffImm16(0)); +#endif +} + +BufferOffset AssemblerMIPSShared::as_j(JOffImm26 off) { + spew("j 0x%x", off.decode()); + BufferOffset bo = writeInst(InstJump(op_j, off).encode()); + return bo; +} +BufferOffset AssemblerMIPSShared::as_jal(JOffImm26 off) { + spew("jal 0x%x", off.decode()); + BufferOffset bo = writeInst(InstJump(op_jal, off).encode()); + return bo; +} + +BufferOffset AssemblerMIPSShared::as_jr(Register rs) { + spew("jr %3s", rs.name()); +#ifdef MIPSR6 + BufferOffset bo = + writeInst(InstReg(op_special, rs, zero, zero, ff_jalr).encode()); +#else + BufferOffset bo = + writeInst(InstReg(op_special, rs, zero, zero, ff_jr).encode()); +#endif + return bo; +} +BufferOffset AssemblerMIPSShared::as_jalr(Register rs) { + spew("jalr %3s", rs.name()); + BufferOffset bo = + writeInst(InstReg(op_special, rs, zero, ra, ff_jalr).encode()); + return bo; +} + +// Arithmetic instructions +BufferOffset AssemblerMIPSShared::as_addu(Register rd, Register rs, + Register rt) { + spew("addu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_addu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_addiu(Register rd, Register rs, + int32_t j) { + MOZ_ASSERT(Imm16::IsInSignedRange(j)); + spew("addiu %3s,%3s,0x%x", rd.name(), rs.name(), j); + return writeInst(InstImm(op_addiu, rs, rd, Imm16(j)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_daddu(Register rd, Register rs, + Register rt) { + spew("daddu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_daddu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_daddiu(Register rd, Register rs, + int32_t j) { + MOZ_ASSERT(Imm16::IsInSignedRange(j)); + spew("daddiu %3s,%3s,0x%x", rd.name(), rs.name(), j); + return writeInst(InstImm(op_daddiu, rs, rd, Imm16(j)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_subu(Register rd, Register rs, + Register rt) { + spew("subu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_subu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsubu(Register rd, Register rs, + Register rt) { + spew("dsubu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_dsubu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mult(Register rs, Register rt) { + spew("mult %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_mult).encode()); +} + +BufferOffset AssemblerMIPSShared::as_multu(Register rs, Register rt) { + spew("multu %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_multu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmult(Register rs, Register rt) { + spew("dmult %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_dmult).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmultu(Register rs, Register rt) { + spew("dmultu %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_dmultu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_div(Register rs, Register rt) { + spew("div %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_div).encode()); +} + +BufferOffset AssemblerMIPSShared::as_div(Register rd, Register rs, + Register rt) { + spew("div %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_div).encode()); +} + +BufferOffset AssemblerMIPSShared::as_divu(Register rs, Register rt) { + spew("divu %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_divu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_divu(Register rd, Register rs, + Register rt) { + spew("divu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_divu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mod(Register rd, Register rs, + Register rt) { + spew("mod %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_mod).encode()); +} + +BufferOffset AssemblerMIPSShared::as_modu(Register rd, Register rs, + Register rt) { + spew("modu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_modu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ddiv(Register rs, Register rt) { + spew("ddiv %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_ddiv).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ddiv(Register rd, Register rs, + Register rt) { + spew("ddiv %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_ddiv).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ddivu(Register rs, Register rt) { + spew("ddivu %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, ff_ddivu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ddivu(Register rd, Register rs, + Register rt) { + spew("ddivu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_ddivu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mul(Register rd, Register rs, + Register rt) { + spew("mul %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); +#ifdef MIPSR6 + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_mul).encode()); +#else + return writeInst(InstReg(op_special2, rs, rt, rd, ff_mul).encode()); +#endif +} + +BufferOffset AssemblerMIPSShared::as_muh(Register rd, Register rs, + Register rt) { + spew("muh %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_muh).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mulu(Register rd, Register rs, + Register rt) { + spew("mulu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_mulu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_muhu(Register rd, Register rs, + Register rt) { + spew("muhu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_muhu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmul(Register rd, Register rs, + Register rt) { + spew("dmul %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_dmul).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmuh(Register rd, Register rs, + Register rt) { + spew("dmuh %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_dmuh).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmulu(Register rd, Register rt, + Register rs) { + spew("dmulu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x2, ff_dmulu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmuhu(Register rd, Register rt, + Register rs) { + spew("dmuhu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_dmuhu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmod(Register rd, Register rs, + Register rt) { + spew("dmod %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_dmod).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmodu(Register rd, Register rs, + Register rt) { + spew("dmodu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x3, ff_dmodu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_madd(Register rs, Register rt) { + spew("madd %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special2, rs, rt, ff_madd).encode()); +} + +BufferOffset AssemblerMIPSShared::as_maddu(Register rs, Register rt) { + spew("maddu %3s,%3s", rs.name(), rt.name()); + return writeInst(InstReg(op_special2, rs, rt, ff_maddu).encode()); +} + +// Shift instructions +BufferOffset AssemblerMIPSShared::as_sll(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("sll %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + return writeInst(InstReg(op_special, rs_zero, rt, rd, sa, ff_sll).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsll(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("dsll %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + return writeInst(InstReg(op_special, rs_zero, rt, rd, sa, ff_dsll).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsll32(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(31 < sa && sa < 64); + spew("dsll32 %3s,%3s, 0x%x", rd.name(), rt.name(), sa - 32); + return writeInst( + InstReg(op_special, rs_zero, rt, rd, sa - 32, ff_dsll32).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sllv(Register rd, Register rt, + Register rs) { + spew("sllv %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_sllv).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsllv(Register rd, Register rt, + Register rs) { + spew("dsllv %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_dsllv).encode()); +} + +BufferOffset AssemblerMIPSShared::as_srl(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("srl %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + return writeInst(InstReg(op_special, rs_zero, rt, rd, sa, ff_srl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsrl(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("dsrl %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + return writeInst(InstReg(op_special, rs_zero, rt, rd, sa, ff_dsrl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsrl32(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(31 < sa && sa < 64); + spew("dsrl32 %3s,%3s, 0x%x", rd.name(), rt.name(), sa - 32); + return writeInst( + InstReg(op_special, rs_zero, rt, rd, sa - 32, ff_dsrl32).encode()); +} + +BufferOffset AssemblerMIPSShared::as_srlv(Register rd, Register rt, + Register rs) { + spew("srlv %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_srlv).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsrlv(Register rd, Register rt, + Register rs) { + spew("dsrlv %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_dsrlv).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sra(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("sra %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + return writeInst(InstReg(op_special, rs_zero, rt, rd, sa, ff_sra).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsra(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("dsra %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + return writeInst(InstReg(op_special, rs_zero, rt, rd, sa, ff_dsra).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsra32(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(31 < sa && sa < 64); + spew("dsra32 %3s,%3s, 0x%x", rd.name(), rt.name(), sa - 32); + return writeInst( + InstReg(op_special, rs_zero, rt, rd, sa - 32, ff_dsra32).encode()); +} + +BufferOffset AssemblerMIPSShared::as_srav(Register rd, Register rt, + Register rs) { + spew("srav %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_srav).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsrav(Register rd, Register rt, + Register rs) { + spew("dsrav %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_dsrav).encode()); +} + +BufferOffset AssemblerMIPSShared::as_rotr(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("rotr %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special, rs_one, rt, rd, sa, ff_srl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_drotr(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(sa < 32); + spew("drotr %3s,%3s, 0x%x", rd.name(), rt.name(), sa); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special, rs_one, rt, rd, sa, ff_dsrl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_drotr32(Register rd, Register rt, + uint16_t sa) { + MOZ_ASSERT(31 < sa && sa < 64); + spew("drotr32%3s,%3s, 0x%x", rd.name(), rt.name(), sa - 32); + MOZ_ASSERT(hasR2()); + return writeInst( + InstReg(op_special, rs_one, rt, rd, sa - 32, ff_dsrl32).encode()); +} + +BufferOffset AssemblerMIPSShared::as_rotrv(Register rd, Register rt, + Register rs) { + spew("rotrv %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special, rs, rt, rd, 1, ff_srlv).encode()); +} + +BufferOffset AssemblerMIPSShared::as_drotrv(Register rd, Register rt, + Register rs) { + spew("drotrv %3s,%3s,%3s", rd.name(), rt.name(), rs.name()); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special, rs, rt, rd, 1, ff_dsrlv).encode()); +} + +// Load and store instructions +BufferOffset AssemblerMIPSShared::as_lb(Register rd, Register rs, int16_t off) { + spew("lb %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lb, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lbu(Register rd, Register rs, + int16_t off) { + spew("lbu %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lbu, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lh(Register rd, Register rs, int16_t off) { + spew("lh %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lh, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lhu(Register rd, Register rs, + int16_t off) { + spew("lhu %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lhu, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lw(Register rd, Register rs, int16_t off) { + spew("lw %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lw, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lwu(Register rd, Register rs, + int16_t off) { + spew("lwu %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lwu, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lwl(Register rd, Register rs, + int16_t off) { + spew("lwl %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lwl, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lwr(Register rd, Register rs, + int16_t off) { + spew("lwr %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_lwr, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ll(Register rd, Register rs, int16_t off) { + spew("ll %3s, (0x%x)%2s", rd.name(), off, rs.name()); +#ifdef MIPSR6 + return writeInst(InstReg(op_special3, rs, rd, ff_ll).encode()); +#else + return writeInst(InstImm(op_ll, rs, rd, Imm16(off)).encode()); +#endif +} + +BufferOffset AssemblerMIPSShared::as_lld(Register rd, Register rs, + int16_t off) { + spew("lld %3s, (0x%x)%2s", rd.name(), off, rs.name()); +#ifdef MIPSR6 + return writeInst(InstReg(op_special3, rs, rd, ff_lld).encode()); +#else + return writeInst(InstImm(op_lld, rs, rd, Imm16(off)).encode()); +#endif +} + +BufferOffset AssemblerMIPSShared::as_ld(Register rd, Register rs, int16_t off) { + spew("ld %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_ld, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ldl(Register rd, Register rs, + int16_t off) { + spew("ldl %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_ldl, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ldr(Register rd, Register rs, + int16_t off) { + spew("ldr %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_ldr, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sb(Register rd, Register rs, int16_t off) { + spew("sb %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_sb, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sh(Register rd, Register rs, int16_t off) { + spew("sh %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_sh, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sw(Register rd, Register rs, int16_t off) { + spew("sw %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_sw, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_swl(Register rd, Register rs, + int16_t off) { + spew("swl %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_swl, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_swr(Register rd, Register rs, + int16_t off) { + spew("swr %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_swr, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sc(Register rd, Register rs, int16_t off) { + spew("sc %3s, (0x%x)%2s", rd.name(), off, rs.name()); +#ifdef MIPSR6 + return writeInst(InstReg(op_special3, rs, rd, ff_sc).encode()); +#else + return writeInst(InstImm(op_sc, rs, rd, Imm16(off)).encode()); +#endif +} + +BufferOffset AssemblerMIPSShared::as_scd(Register rd, Register rs, + int16_t off) { +#ifdef MIPSR6 + return writeInst(InstReg(op_special3, rs, rd, ff_scd).encode()); +#else + spew("scd %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_scd, rs, rd, Imm16(off)).encode()); +#endif +} + +BufferOffset AssemblerMIPSShared::as_sd(Register rd, Register rs, int16_t off) { + spew("sd %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_sd, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sdl(Register rd, Register rs, + int16_t off) { + spew("sdl %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_sdl, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sdr(Register rd, Register rs, + int16_t off) { + spew("sdr %3s, (0x%x)%2s", rd.name(), off, rs.name()); + return writeInst(InstImm(op_sdr, rs, rd, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_seleqz(Register rd, Register rs, + Register rt) { + spew("seleqz %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x0, ff_seleqz).encode()); +} + +BufferOffset AssemblerMIPSShared::as_selnez(Register rd, Register rs, + Register rt) { + spew("selnez %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, 0x0, ff_selnez).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslbx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gslbx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_ldc2, rs, rd, ri, Imm8(off), ff_gsxbx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gssbx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gssbx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_sdc2, rs, rd, ri, Imm8(off), ff_gsxbx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslhx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gslhx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_ldc2, rs, rd, ri, Imm8(off), ff_gsxhx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsshx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsshx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_sdc2, rs, rd, ri, Imm8(off), ff_gsxhx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslwx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gslwx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_ldc2, rs, rd, ri, Imm8(off), ff_gsxwx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsswx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsswx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_sdc2, rs, rd, ri, Imm8(off), ff_gsxwx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsldx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsldx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_ldc2, rs, rd, ri, Imm8(off), ff_gsxdx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gssdx(Register rd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gssdx %3s,%3s, (0x%x)%2s", rd.name(), rs.name(), off, ri.name()); + return writeInst(InstGS(op_sdc2, rs, rd, ri, Imm8(off), ff_gsxdx).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslq(Register rh, Register rl, Register rs, + int16_t off) { + MOZ_ASSERT(GSImm13::IsInRange(off)); + spew("gslq %3s,%3s, (0x%x)%2s", rh.name(), rl.name(), off, rs.name()); + return writeInst(InstGS(op_lwc2, rs, rl, rh, GSImm13(off), ff_gsxq).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gssq(Register rh, Register rl, Register rs, + int16_t off) { + MOZ_ASSERT(GSImm13::IsInRange(off)); + spew("gssq %3s,%3s, (0x%x)%2s", rh.name(), rl.name(), off, rs.name()); + return writeInst(InstGS(op_swc2, rs, rl, rh, GSImm13(off), ff_gsxq).encode()); +} + +// Move from HI/LO register. +BufferOffset AssemblerMIPSShared::as_mfhi(Register rd) { + spew("mfhi %3s", rd.name()); + return writeInst(InstReg(op_special, rd, ff_mfhi).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mflo(Register rd) { + spew("mflo %3s", rd.name()); + return writeInst(InstReg(op_special, rd, ff_mflo).encode()); +} + +// Set on less than. +BufferOffset AssemblerMIPSShared::as_slt(Register rd, Register rs, + Register rt) { + spew("slt %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_slt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sltu(Register rd, Register rs, + Register rt) { + spew("sltu %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_sltu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_slti(Register rd, Register rs, int32_t j) { + MOZ_ASSERT(Imm16::IsInSignedRange(j)); + spew("slti %3s,%3s, 0x%x", rd.name(), rs.name(), j); + return writeInst(InstImm(op_slti, rs, rd, Imm16(j)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sltiu(Register rd, Register rs, + uint32_t j) { + MOZ_ASSERT(Imm16::IsInSignedRange(int32_t(j))); + spew("sltiu %3s,%3s, 0x%x", rd.name(), rs.name(), j); + return writeInst(InstImm(op_sltiu, rs, rd, Imm16(j)).encode()); +} + +// Conditional move. +BufferOffset AssemblerMIPSShared::as_movz(Register rd, Register rs, + Register rt) { + spew("movz %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_movz).encode()); +} + +BufferOffset AssemblerMIPSShared::as_movn(Register rd, Register rs, + Register rt) { + spew("movn %3s,%3s,%3s", rd.name(), rs.name(), rt.name()); + return writeInst(InstReg(op_special, rs, rt, rd, ff_movn).encode()); +} + +BufferOffset AssemblerMIPSShared::as_movt(Register rd, Register rs, + uint16_t cc) { + Register rt; + rt = Register::FromCode((cc & 0x7) << 2 | 1); + spew("movt %3s,%3s, FCC%d", rd.name(), rs.name(), cc); + return writeInst(InstReg(op_special, rs, rt, rd, ff_movci).encode()); +} + +BufferOffset AssemblerMIPSShared::as_movf(Register rd, Register rs, + uint16_t cc) { + Register rt; + rt = Register::FromCode((cc & 0x7) << 2 | 0); + spew("movf %3s,%3s, FCC%d", rd.name(), rs.name(), cc); + return writeInst(InstReg(op_special, rs, rt, rd, ff_movci).encode()); +} + +// Bit twiddling. +BufferOffset AssemblerMIPSShared::as_clz(Register rd, Register rs) { + spew("clz %3s,%3s", rd.name(), rs.name()); +#ifdef MIPSR6 + return writeInst(InstReg(op_special, rs, 0x0, rd, 0x1, ff_clz).encode()); +#else + return writeInst(InstReg(op_special2, rs, rd, rd, ff_clz).encode()); +#endif +} + +BufferOffset AssemblerMIPSShared::as_dclz(Register rd, Register rs) { + spew("dclz %3s,%3s", rd.name(), rs.name()); +#ifdef MIPSR6 + return writeInst(InstReg(op_special, rs, 0x0, rd, 0x1, ff_dclz).encode()); +#else + return writeInst(InstReg(op_special2, rs, rd, rd, ff_dclz).encode()); +#endif +} + +BufferOffset AssemblerMIPSShared::as_wsbh(Register rd, Register rt) { + spew("wsbh %3s,%3s", rd.name(), rt.name()); + return writeInst(InstReg(op_special3, zero, rt, rd, 0x2, ff_bshfl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dsbh(Register rd, Register rt) { + spew("dsbh %3s,%3s", rd.name(), rt.name()); + return writeInst(InstReg(op_special3, zero, rt, rd, 0x2, ff_dbshfl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dshd(Register rd, Register rt) { + spew("dshd %3s,%3s", rd.name(), rt.name()); + return writeInst(InstReg(op_special3, zero, rt, rd, 0x5, ff_dbshfl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ins(Register rt, Register rs, uint16_t pos, + uint16_t size) { + MOZ_ASSERT(pos < 32 && size != 0 && size <= 32 && pos + size != 0 && + pos + size <= 32); + Register rd; + rd = Register::FromCode(pos + size - 1); + spew("ins %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, rs, rt, rd, pos, ff_ins).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dins(Register rt, Register rs, + uint16_t pos, uint16_t size) { + MOZ_ASSERT(pos < 32 && size != 0 && size <= 32 && pos + size != 0 && + pos + size <= 32); + Register rd; + rd = Register::FromCode(pos + size - 1); + spew("dins %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, rs, rt, rd, pos, ff_dins).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dinsm(Register rt, Register rs, + uint16_t pos, uint16_t size) { + MOZ_ASSERT(pos < 32 && size >= 2 && size <= 64 && pos + size > 32 && + pos + size <= 64); + Register rd; + rd = Register::FromCode(pos + size - 1 - 32); + spew("dinsm %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, rs, rt, rd, pos, ff_dinsm).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dinsu(Register rt, Register rs, + uint16_t pos, uint16_t size) { + MOZ_ASSERT(pos >= 32 && pos < 64 && size >= 1 && size <= 32 && + pos + size > 32 && pos + size <= 64); + Register rd; + rd = Register::FromCode(pos + size - 1 - 32); + spew("dinsu %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst( + InstReg(op_special3, rs, rt, rd, pos - 32, ff_dinsu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ext(Register rt, Register rs, uint16_t pos, + uint16_t size) { + MOZ_ASSERT(pos < 32 && size != 0 && size <= 32 && pos + size != 0 && + pos + size <= 32); + Register rd; + rd = Register::FromCode(size - 1); + spew("ext %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, rs, rt, rd, pos, ff_ext).encode()); +} + +// Sign extend +BufferOffset AssemblerMIPSShared::as_seb(Register rd, Register rt) { + spew("seb %3s,%3s", rd.name(), rt.name()); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, zero, rt, rd, 16, ff_bshfl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_seh(Register rd, Register rt) { + spew("seh %3s,%3s", rd.name(), rt.name()); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, zero, rt, rd, 24, ff_bshfl).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dext(Register rt, Register rs, + uint16_t pos, uint16_t size) { + MOZ_ASSERT(pos < 32 && size != 0 && size <= 32 && pos + size != 0 && + pos + size <= 63); + Register rd; + rd = Register::FromCode(size - 1); + spew("dext %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, rs, rt, rd, pos, ff_dext).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dextm(Register rt, Register rs, + uint16_t pos, uint16_t size) { + MOZ_ASSERT(pos < 32 && size > 32 && size <= 64 && pos + size > 32 && + pos + size <= 64); + Register rd; + rd = Register::FromCode(size - 1 - 32); + spew("dextm %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_special3, rs, rt, rd, pos, ff_dextm).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dextu(Register rt, Register rs, + uint16_t pos, uint16_t size) { + MOZ_ASSERT(pos >= 32 && pos < 64 && size != 0 && size <= 32 && + pos + size > 32 && pos + size <= 64); + Register rd; + rd = Register::FromCode(size - 1); + spew("dextu %3s,%3s, %d, %d", rt.name(), rs.name(), pos, size); + MOZ_ASSERT(hasR2()); + return writeInst( + InstReg(op_special3, rs, rt, rd, pos - 32, ff_dextu).encode()); +} + +// FP instructions +BufferOffset AssemblerMIPSShared::as_ldc1(FloatRegister ft, Register base, + int32_t off) { + MOZ_ASSERT(Imm16::IsInSignedRange(off)); + spew("ldc1 %3s, (0x%x)%2s", ft.name(), off, base.name()); + return writeInst(InstImm(op_ldc1, base, ft, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sdc1(FloatRegister ft, Register base, + int32_t off) { + MOZ_ASSERT(Imm16::IsInSignedRange(off)); + spew("sdc1 %3s, (0x%x)%2s", ft.name(), off, base.name()); + return writeInst(InstImm(op_sdc1, base, ft, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_lwc1(FloatRegister ft, Register base, + int32_t off) { + MOZ_ASSERT(Imm16::IsInSignedRange(off)); + spew("lwc1 %3s, (0x%x)%2s", ft.name(), off, base.name()); + return writeInst(InstImm(op_lwc1, base, ft, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_swc1(FloatRegister ft, Register base, + int32_t off) { + MOZ_ASSERT(Imm16::IsInSignedRange(off)); + spew("swc1 %3s, (0x%x)%2s", ft.name(), off, base.name()); + return writeInst(InstImm(op_swc1, base, ft, Imm16(off)).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsldl(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsldl %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_lwc2, base, fd, Imm8(off), ff_gsxdlc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsldr(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsldr %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_lwc2, base, fd, Imm8(off), ff_gsxdrc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gssdl(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gssdl %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_swc2, base, fd, Imm8(off), ff_gsxdlc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gssdr(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gssdr %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_swc2, base, fd, Imm8(off), ff_gsxdrc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslsl(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gslsl %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_lwc2, base, fd, Imm8(off), ff_gsxwlc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslsr(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gslsr %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_lwc2, base, fd, Imm8(off), ff_gsxwrc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsssl(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsssl %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_swc2, base, fd, Imm8(off), ff_gsxwlc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsssr(FloatRegister fd, Register base, + int32_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsssr %3s, (0x%x)%2s", fd.name(), off, base.name()); + return writeInst(InstGS(op_swc2, base, fd, Imm8(off), ff_gsxwrc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslsx(FloatRegister fd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gslsx %3s, (%3s,%3s, 0x%x)", fd.name(), rs.name(), ri.name(), off); + return writeInst(InstGS(op_ldc2, rs, fd, ri, Imm8(off), ff_gsxwxc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsssx(FloatRegister fd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsssx %3s, (%3s,%3s, 0x%x)", fd.name(), rs.name(), ri.name(), off); + return writeInst(InstGS(op_sdc2, rs, fd, ri, Imm8(off), ff_gsxwxc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gsldx(FloatRegister fd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gsldx %3s, (%3s,%3s, 0x%x)", fd.name(), rs.name(), ri.name(), off); + return writeInst(InstGS(op_ldc2, rs, fd, ri, Imm8(off), ff_gsxdxc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gssdx(FloatRegister fd, Register rs, + Register ri, int16_t off) { + MOZ_ASSERT(Imm8::IsInSignedRange(off)); + spew("gssdx %3s, (%3s,%3s, 0x%x)", fd.name(), rs.name(), ri.name(), off); + return writeInst(InstGS(op_sdc2, rs, fd, ri, Imm8(off), ff_gsxdxc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gslq(FloatRegister rh, FloatRegister rl, + Register rs, int16_t off) { + MOZ_ASSERT(GSImm13::IsInRange(off)); + spew("gslq %3s,%3s, (0x%x)%2s", rh.name(), rl.name(), off, rs.name()); + return writeInst( + InstGS(op_lwc2, rs, rl, rh, GSImm13(off), ff_gsxqc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_gssq(FloatRegister rh, FloatRegister rl, + Register rs, int16_t off) { + MOZ_ASSERT(GSImm13::IsInRange(off)); + spew("gssq %3s,%3s, (0x%x)%2s", rh.name(), rl.name(), off, rs.name()); + return writeInst( + InstGS(op_swc2, rs, rl, rh, GSImm13(off), ff_gsxqc1).encode()); +} + +BufferOffset AssemblerMIPSShared::as_movs(FloatRegister fd, FloatRegister fs) { + spew("mov.s %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, zero, fs, fd, ff_mov_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_movd(FloatRegister fd, FloatRegister fs) { + spew("mov.d %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, zero, fs, fd, ff_mov_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ctc1(Register rt, FPControl fc) { + spew("ctc1 %3s,%d", rt.name(), fc); + return writeInst(InstReg(op_cop1, rs_ctc1, rt, (uint32_t)fc).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cfc1(Register rt, FPControl fc) { + spew("cfc1 %3s,%d", rt.name(), fc); + return writeInst(InstReg(op_cop1, rs_cfc1, rt, (uint32_t)fc).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mtc1(Register rt, FloatRegister fs) { + spew("mtc1 %3s,%3s", rt.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_mtc1, rt, fs).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mfc1(Register rt, FloatRegister fs) { + spew("mfc1 %3s,%3s", rt.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_mfc1, rt, fs).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mthc1(Register rt, FloatRegister fs) { + spew("mthc1 %3s,%3s", rt.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_mthc1, rt, fs).encode()); +} + +BufferOffset AssemblerMIPSShared::as_mfhc1(Register rt, FloatRegister fs) { + spew("mfhc1 %3s,%3s", rt.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_mfhc1, rt, fs).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmtc1(Register rt, FloatRegister fs) { + spew("dmtc1 %3s,%3s", rt.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_dmtc1, rt, fs).encode()); +} + +BufferOffset AssemblerMIPSShared::as_dmfc1(Register rt, FloatRegister fs) { + spew("dmfc1 %3s,%3s", rt.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_dmfc1, rt, fs).encode()); +} + +// FP convert instructions +BufferOffset AssemblerMIPSShared::as_ceilws(FloatRegister fd, + FloatRegister fs) { + spew("ceil.w.s%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_s, zero, fs, fd, ff_ceil_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_floorws(FloatRegister fd, + FloatRegister fs) { + spew("floor.w.s%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_s, zero, fs, fd, ff_floor_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_roundws(FloatRegister fd, + FloatRegister fs) { + spew("round.w.s%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_s, zero, fs, fd, ff_round_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_truncws(FloatRegister fd, + FloatRegister fs) { + spew("trunc.w.s%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_s, zero, fs, fd, ff_trunc_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_truncls(FloatRegister fd, + FloatRegister fs) { + spew("trunc.l.s%3s,%3s", fd.name(), fs.name()); + MOZ_ASSERT(hasR2()); + return writeInst( + InstReg(op_cop1, rs_s, zero, fs, fd, ff_trunc_l_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_ceilwd(FloatRegister fd, + FloatRegister fs) { + spew("ceil.w.d%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_d, zero, fs, fd, ff_ceil_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_floorwd(FloatRegister fd, + FloatRegister fs) { + spew("floor.w.d%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_d, zero, fs, fd, ff_floor_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_roundwd(FloatRegister fd, + FloatRegister fs) { + spew("round.w.d%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_d, zero, fs, fd, ff_round_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_truncwd(FloatRegister fd, + FloatRegister fs) { + spew("trunc.w.d%3s,%3s", fd.name(), fs.name()); + return writeInst( + InstReg(op_cop1, rs_d, zero, fs, fd, ff_trunc_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_truncld(FloatRegister fd, + FloatRegister fs) { + spew("trunc.l.d%3s,%3s", fd.name(), fs.name()); + MOZ_ASSERT(hasR2()); + return writeInst( + InstReg(op_cop1, rs_d, zero, fs, fd, ff_trunc_l_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtdl(FloatRegister fd, FloatRegister fs) { + spew("cvt.d.l%3s,%3s", fd.name(), fs.name()); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_cop1, rs_l, zero, fs, fd, ff_cvt_d_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtds(FloatRegister fd, FloatRegister fs) { + spew("cvt.d.s%3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, zero, fs, fd, ff_cvt_d_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtdw(FloatRegister fd, FloatRegister fs) { + spew("cvt.d.w%3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_w, zero, fs, fd, ff_cvt_d_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtsd(FloatRegister fd, FloatRegister fs) { + spew("cvt.s.d%3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, zero, fs, fd, ff_cvt_s_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtsl(FloatRegister fd, FloatRegister fs) { + spew("cvt.s.l%3s,%3s", fd.name(), fs.name()); + MOZ_ASSERT(hasR2()); + return writeInst(InstReg(op_cop1, rs_l, zero, fs, fd, ff_cvt_s_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtsw(FloatRegister fd, FloatRegister fs) { + spew("cvt.s.w%3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_w, zero, fs, fd, ff_cvt_s_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtwd(FloatRegister fd, FloatRegister fs) { + spew("cvt.w.d%3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, zero, fs, fd, ff_cvt_w_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_cvtws(FloatRegister fd, FloatRegister fs) { + spew("cvt.w.s%3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, zero, fs, fd, ff_cvt_w_fmt).encode()); +} + +// FP arithmetic instructions +BufferOffset AssemblerMIPSShared::as_adds(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("add.s %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_s, ft, fs, fd, ff_add_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_addd(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("add.d %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_d, ft, fs, fd, ff_add_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_subs(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("sub.s %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_s, ft, fs, fd, ff_sub_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_subd(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("sub.d %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_d, ft, fs, fd, ff_sub_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_abss(FloatRegister fd, FloatRegister fs) { + spew("abs.s %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, zero, fs, fd, ff_abs_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_absd(FloatRegister fd, FloatRegister fs) { + spew("abs.d %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, zero, fs, fd, ff_abs_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_negs(FloatRegister fd, FloatRegister fs) { + spew("neg.s %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, zero, fs, fd, ff_neg_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_negd(FloatRegister fd, FloatRegister fs) { + spew("neg.d %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, zero, fs, fd, ff_neg_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_muls(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("mul.s %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_s, ft, fs, fd, ff_mul_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_muld(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("mul.d %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_d, ft, fs, fd, ff_mul_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_divs(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("div.s %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_s, ft, fs, fd, ff_div_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_divd(FloatRegister fd, FloatRegister fs, + FloatRegister ft) { + spew("divd.d %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_d, ft, fs, fd, ff_div_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sqrts(FloatRegister fd, FloatRegister fs) { + spew("sqrts %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, zero, fs, fd, ff_sqrt_fmt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_sqrtd(FloatRegister fd, FloatRegister fs) { + spew("sqrtd %3s,%3s", fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, zero, fs, fd, ff_sqrt_fmt).encode()); +} + +// FP compare instructions +BufferOffset AssemblerMIPSShared::as_cf(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.f.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_f_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_f_fmt).encode()); +#endif + } else { + spew("c.f.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_f_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_f_fmt).encode()); +#endif + } +} + +BufferOffset AssemblerMIPSShared::as_cun(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.un.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_un_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_un_fmt).encode()); +#endif + } else { + spew("c.un.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_un_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_un_fmt).encode()); +#endif + } +} + +BufferOffset AssemblerMIPSShared::as_ceq(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.eq.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_eq_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_eq_fmt).encode()); +#endif + } else { + spew("c.eq.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_eq_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_eq_fmt).encode()); +#endif + } +} + +BufferOffset AssemblerMIPSShared::as_cueq(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, + FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.ueq.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_ueq_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_ueq_fmt).encode()); +#endif + } else { + spew("c.ueq.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_ueq_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_ueq_fmt).encode()); +#endif + } +} + +BufferOffset AssemblerMIPSShared::as_colt(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, + FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.olt.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_olt_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_olt_fmt).encode()); +#endif + } else { + spew("c.olt.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_olt_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_olt_fmt).encode()); +#endif + } +} + +BufferOffset AssemblerMIPSShared::as_cult(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, + FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.ult.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_ult_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_ult_fmt).encode()); +#endif + } else { + spew("c.ult.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_ult_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_ult_fmt).encode()); +#endif + } +} + +BufferOffset AssemblerMIPSShared::as_cole(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, + FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.ole.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_ole_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_ole_fmt).encode()); +#endif + } else { + spew("c.ole.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_ole_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_ole_fmt).encode()); +#endif + } +} + +BufferOffset AssemblerMIPSShared::as_cule(FloatFormat fmt, FloatRegister fs, + FloatRegister ft, + FPConditionBit fcc) { + if (fmt == DoubleFloat) { + spew("c.ule.d FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_d_r6, ft, fs, FloatRegisters::f24, ff_c_ule_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_d, ft, fs, fcc << FccShift, ff_c_ule_fmt).encode()); +#endif + } else { + spew("c.ule.s FCC%d,%3s,%3s", fcc, fs.name(), ft.name()); +#ifdef MIPSR6 + return writeInst( + InstReg(op_cop1, rs_s_r6, ft, fs, FloatRegisters::f24, ff_c_ule_fmt) + .encode()); +#else + return writeInst( + InstReg(op_cop1, rs_s, ft, fs, fcc << FccShift, ff_c_ule_fmt).encode()); +#endif + } +} + +// FP conditional move. +BufferOffset AssemblerMIPSShared::as_movt(FloatFormat fmt, FloatRegister fd, + FloatRegister fs, + FPConditionBit fcc) { + Register rt = Register::FromCode(fcc << 2 | 1); + if (fmt == DoubleFloat) { + spew("movt.d FCC%d,%3s,%3s", fcc, fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, rt, fs, fd, ff_movf_fmt).encode()); + } else { + spew("movt.s FCC%d,%3s,%3s", fcc, fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, rt, fs, fd, ff_movf_fmt).encode()); + } +} + +BufferOffset AssemblerMIPSShared::as_movf(FloatFormat fmt, FloatRegister fd, + FloatRegister fs, + FPConditionBit fcc) { + Register rt = Register::FromCode(fcc << 2 | 0); + if (fmt == DoubleFloat) { + spew("movf.d FCC%d,%3s,%3s", fcc, fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_d, rt, fs, fd, ff_movf_fmt).encode()); + } else { + spew("movf.s FCC%d,%3s,%3s", fcc, fd.name(), fs.name()); + return writeInst(InstReg(op_cop1, rs_s, rt, fs, fd, ff_movf_fmt).encode()); + } +} + +BufferOffset AssemblerMIPSShared::as_movz(FloatFormat fmt, FloatRegister fd, + FloatRegister fs, Register rt) { + if (fmt == DoubleFloat) { + spew("movz.d %3s,%3s,%3s", fd.name(), fs.name(), rt.name()); + return writeInst(InstReg(op_cop1, rs_d, rt, fs, fd, ff_movz_fmt).encode()); + } else { + spew("movz.s %3s,%3s,%3s", fd.name(), fs.name(), rt.name()); + return writeInst(InstReg(op_cop1, rs_s, rt, fs, fd, ff_movz_fmt).encode()); + } +} + +BufferOffset AssemblerMIPSShared::as_movn(FloatFormat fmt, FloatRegister fd, + FloatRegister fs, Register rt) { + if (fmt == DoubleFloat) { + spew("movn.d %3s,%3s,%3s", fd.name(), fs.name(), rt.name()); + return writeInst(InstReg(op_cop1, rs_d, rt, fs, fd, ff_movn_fmt).encode()); + } else { + spew("movn.s %3s,%3s,%3s", fd.name(), fs.name(), rt.name()); + return writeInst(InstReg(op_cop1, rs_s, rt, fs, fd, ff_movn_fmt).encode()); + } +} + +BufferOffset AssemblerMIPSShared::as_max(FloatFormat fmt, FloatRegister fd, + FloatRegister fs, FloatRegister ft) { + if (fmt == DoubleFloat) { + spew("max %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_d, ft, fs, fd, ff_max).encode()); + } else { + spew("max %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_s, ft, fs, fd, ff_max).encode()); + } +} + +BufferOffset AssemblerMIPSShared::as_min(FloatFormat fmt, FloatRegister fd, + FloatRegister fs, FloatRegister ft) { + if (fmt == DoubleFloat) { + spew("min %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_d, ft, fs, fd, ff_min).encode()); + } else { + spew("min %3s,%3s,%3s", fd.name(), fs.name(), ft.name()); + return writeInst(InstReg(op_cop1, rs_s, ft, fs, fd, ff_min).encode()); + } +} + +BufferOffset AssemblerMIPSShared::as_tge(Register rs, Register rt, + uint32_t code) { + MOZ_ASSERT(code <= MAX_BREAK_CODE); + spew("tge %3s,%3s,%d", rs.name(), rt.name(), code); + return writeInst(InstReg(op_special, rs, rt, zero, code, ff_tge).encode()); +} + +BufferOffset AssemblerMIPSShared::as_tgeu(Register rs, Register rt, + uint32_t code) { + MOZ_ASSERT(code <= MAX_BREAK_CODE); + spew("tgeu %3s,%3s,%d", rs.name(), rt.name(), code); + return writeInst(InstReg(op_special, rs, rt, zero, code, ff_tgeu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_tlt(Register rs, Register rt, + uint32_t code) { + MOZ_ASSERT(code <= MAX_BREAK_CODE); + spew("tlt %3s,%3s,%d", rs.name(), rt.name(), code); + return writeInst(InstReg(op_special, rs, rt, zero, code, ff_tlt).encode()); +} + +BufferOffset AssemblerMIPSShared::as_tltu(Register rs, Register rt, + uint32_t code) { + MOZ_ASSERT(code <= MAX_BREAK_CODE); + spew("tltu %3s,%3s,%d", rs.name(), rt.name(), code); + return writeInst(InstReg(op_special, rs, rt, zero, code, ff_tltu).encode()); +} + +BufferOffset AssemblerMIPSShared::as_teq(Register rs, Register rt, + uint32_t code) { + MOZ_ASSERT(code <= MAX_BREAK_CODE); + spew("teq %3s,%3s,%d", rs.name(), rt.name(), code); + return writeInst(InstReg(op_special, rs, rt, zero, code, ff_teq).encode()); +} + +BufferOffset AssemblerMIPSShared::as_tne(Register rs, Register rt, + uint32_t code) { + MOZ_ASSERT(code <= MAX_BREAK_CODE); + spew("tne %3s,%3s,%d", rs.name(), rt.name(), code); + return writeInst(InstReg(op_special, rs, rt, zero, code, ff_tne).encode()); +} + +void AssemblerMIPSShared::bind(Label* label, BufferOffset boff) { + spew(".set Llabel %p", label); + // If our caller didn't give us an explicit target to bind to + // then we want to bind to the location of the next instruction + BufferOffset dest = boff.assigned() ? boff : nextOffset(); + if (label->used()) { + int32_t next; + + // A used label holds a link to branch that uses it. + BufferOffset b(label); + do { + // Even a 0 offset may be invalid if we're out of memory. + if (oom()) { + return; + } + + Instruction* inst = editSrc(b); + + // Second word holds a pointer to the next branch in label's chain. + next = inst[1].encode(); + bind(reinterpret_cast<InstImm*>(inst), b.getOffset(), dest.getOffset()); + + b = BufferOffset(next); + } while (next != LabelBase::INVALID_OFFSET); + } + label->bind(dest.getOffset()); +} + +void AssemblerMIPSShared::retarget(Label* label, Label* target) { + spew("retarget %p -> %p", label, target); + if (label->used() && !oom()) { + if (target->bound()) { + bind(label, BufferOffset(target)); + } else if (target->used()) { + // The target is not bound but used. Prepend label's branch list + // onto target's. + int32_t next; + BufferOffset labelBranchOffset(label); + + // Find the head of the use chain for label. + do { + Instruction* inst = editSrc(labelBranchOffset); + + // Second word holds a pointer to the next branch in chain. + next = inst[1].encode(); + labelBranchOffset = BufferOffset(next); + } while (next != LabelBase::INVALID_OFFSET); + + // Then patch the head of label's use chain to the tail of + // target's use chain, prepending the entire use chain of target. + Instruction* inst = editSrc(labelBranchOffset); + int32_t prev = target->offset(); + target->use(label->offset()); + inst[1].setData(prev); + } else { + // The target is unbound and unused. We can just take the head of + // the list hanging off of label, and dump that into target. + target->use(label->offset()); + } + } + label->reset(); +} + +void dbg_break() {} +void AssemblerMIPSShared::as_break(uint32_t code) { + MOZ_ASSERT(code <= MAX_BREAK_CODE); + spew("break %d", code); + writeInst(op_special | code << FunctionBits | ff_break); +} + +void AssemblerMIPSShared::as_sync(uint32_t stype) { + MOZ_ASSERT(stype <= 31); + spew("sync %d", stype); + writeInst(InstReg(op_special, zero, zero, zero, stype, ff_sync).encode()); +} + +// This just stomps over memory with 32 bits of raw data. Its purpose is to +// overwrite the call of JITed code with 32 bits worth of an offset. This will +// is only meant to function on code that has been invalidated, so it should +// be totally safe. Since that instruction will never be executed again, a +// ICache flush should not be necessary +void AssemblerMIPSShared::PatchWrite_Imm32(CodeLocationLabel label, Imm32 imm) { + // Raw is going to be the return address. + uint32_t* raw = (uint32_t*)label.raw(); + // Overwrite the 4 bytes before the return address, which will + // end up being the call instruction. + *(raw - 1) = imm.value; +} + +uint8_t* AssemblerMIPSShared::NextInstruction(uint8_t* inst_, uint32_t* count) { + Instruction* inst = reinterpret_cast<Instruction*>(inst_); + if (count != nullptr) { + *count += sizeof(Instruction); + } + return reinterpret_cast<uint8_t*>(inst->next()); +} + +// Since there are no pools in MIPS implementation, this should be simple. +Instruction* Instruction::next() { return this + 1; } + +InstImm AssemblerMIPSShared::invertBranch(InstImm branch, + BOffImm16 skipOffset) { + uint32_t rt = 0; + OpcodeField op = (OpcodeField)(branch.extractOpcode() << OpcodeShift); + switch (op) { + case op_beq: + branch.setBOffImm16(skipOffset); + branch.setOpcode(op_bne); + return branch; + case op_bne: + branch.setBOffImm16(skipOffset); + branch.setOpcode(op_beq); + return branch; + case op_bgtz: + branch.setBOffImm16(skipOffset); + branch.setOpcode(op_blez); + return branch; + case op_blez: + branch.setBOffImm16(skipOffset); + branch.setOpcode(op_bgtz); + return branch; + case op_regimm: + branch.setBOffImm16(skipOffset); + rt = branch.extractRT(); + if (rt == (rt_bltz >> RTShift)) { + branch.setRT(rt_bgez); + return branch; + } + if (rt == (rt_bgez >> RTShift)) { + branch.setRT(rt_bltz); + return branch; + } + + MOZ_CRASH("Error creating long branch."); + + case op_cop1: + MOZ_ASSERT(branch.extractRS() == rs_bc1 >> RSShift); + + branch.setBOffImm16(skipOffset); + rt = branch.extractRT(); + if (rt & 0x1) { + branch.setRT((RTField)((rt & ~0x1) << RTShift)); + } else { + branch.setRT((RTField)((rt | 0x1) << RTShift)); + } + return branch; + default: + MOZ_CRASH("Error creating long branch."); + } +} + +void AssemblerMIPSShared::ToggleToJmp(CodeLocationLabel inst_) { + InstImm* inst = (InstImm*)inst_.raw(); + + MOZ_ASSERT(inst->extractOpcode() == ((uint32_t)op_andi >> OpcodeShift)); + // We converted beq to andi, so now we restore it. + inst->setOpcode(op_beq); +} + +void AssemblerMIPSShared::ToggleToCmp(CodeLocationLabel inst_) { + InstImm* inst = (InstImm*)inst_.raw(); + + // toggledJump is allways used for short jumps. + MOZ_ASSERT(inst->extractOpcode() == ((uint32_t)op_beq >> OpcodeShift)); + // Replace "beq $zero, $zero, offset" with "andi $zero, $zero, offset" + inst->setOpcode(op_andi); +} + +void AssemblerMIPSShared::UpdateLuiOriValue(Instruction* inst0, + Instruction* inst1, + uint32_t value) { + MOZ_ASSERT(inst0->extractOpcode() == ((uint32_t)op_lui >> OpcodeShift)); + MOZ_ASSERT(inst1->extractOpcode() == ((uint32_t)op_ori >> OpcodeShift)); + + ((InstImm*)inst0)->setImm16(Imm16::Upper(Imm32(value))); + ((InstImm*)inst1)->setImm16(Imm16::Lower(Imm32(value))); +} + +#ifdef JS_JITSPEW +void AssemblerMIPSShared::decodeBranchInstAndSpew(InstImm branch) { + OpcodeField op = (OpcodeField)(branch.extractOpcode() << OpcodeShift); + uint32_t rt_id; + uint32_t rs_id; + uint32_t immi = branch.extractImm16Value(); + uint32_t fcc; + switch (op) { + case op_beq: + rt_id = branch.extractRT(); + rs_id = branch.extractRS(); + spew("beq %3s,%3s,0x%x", Registers::GetName(rs_id), + Registers::GetName(rt_id), (int32_t(immi << 18) >> 16) + 4); + break; + case op_bne: + rt_id = branch.extractRT(); + rs_id = branch.extractRS(); + spew("bne %3s,%3s,0x%x", Registers::GetName(rs_id), + Registers::GetName(rt_id), (int32_t(immi << 18) >> 16) + 4); + break; + case op_bgtz: + rs_id = branch.extractRS(); + spew("bgt %3s, 0,0x%x", Registers::GetName(rs_id), + (int32_t(immi << 18) >> 16) + 4); + break; + case op_blez: + rs_id = branch.extractRS(); + spew("ble %3s, 0,0x%x", Registers::GetName(rs_id), + (int32_t(immi << 18) >> 16) + 4); + break; + case op_regimm: + rt_id = branch.extractRT(); + if (rt_id == (rt_bltz >> RTShift)) { + rs_id = branch.extractRS(); + spew("blt %3s, 0,0x%x", Registers::GetName(rs_id), + (int32_t(immi << 18) >> 16) + 4); + } else if (rt_id == (rt_bgez >> RTShift)) { + rs_id = branch.extractRS(); + spew("bge %3s, 0,0x%x", Registers::GetName(rs_id), + (int32_t(immi << 18) >> 16) + 4); + } else { + MOZ_CRASH("Error disassemble branch."); + } + break; + case op_cop1: + MOZ_ASSERT(branch.extractRS() == rs_bc1 >> RSShift); + rt_id = branch.extractRT(); + fcc = branch.extractBitField(FCccShift + FCccBits - 1, FCccShift); + if (rt_id & 0x1) { + spew("bc1t FCC%d, 0x%x", fcc, (int32_t(immi << 18) >> 16) + 4); + } else { + spew("bc1f FCC%d, 0x%x", fcc, (int32_t(immi << 18) >> 16) + 4); + } + break; + default: + MOZ_CRASH("Error disassemble branch."); + } +} +#endif diff --git a/js/src/jit/mips-shared/Assembler-mips-shared.h b/js/src/jit/mips-shared/Assembler-mips-shared.h new file mode 100644 index 0000000000..fabb963fdc --- /dev/null +++ b/js/src/jit/mips-shared/Assembler-mips-shared.h @@ -0,0 +1,1495 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_Assembler_mips_shared_h +#define jit_mips_shared_Assembler_mips_shared_h + +#include "mozilla/Attributes.h" +#include "mozilla/MathAlgorithms.h" +#include "mozilla/Sprintf.h" + +#include "jit/CompactBuffer.h" +#include "jit/JitCode.h" +#include "jit/JitSpewer.h" +#include "jit/mips-shared/Architecture-mips-shared.h" +#include "jit/shared/Assembler-shared.h" +#include "jit/shared/IonAssemblerBuffer.h" +#include "wasm/WasmTypeDecls.h" + +namespace js { +namespace jit { + +static constexpr Register zero{Registers::zero}; +static constexpr Register at{Registers::at}; +static constexpr Register v0{Registers::v0}; +static constexpr Register v1{Registers::v1}; +static constexpr Register a0{Registers::a0}; +static constexpr Register a1{Registers::a1}; +static constexpr Register a2{Registers::a2}; +static constexpr Register a3{Registers::a3}; +static constexpr Register a4{Registers::ta0}; +static constexpr Register a5{Registers::ta1}; +static constexpr Register a6{Registers::ta2}; +static constexpr Register a7{Registers::ta3}; +static constexpr Register t0{Registers::t0}; +static constexpr Register t1{Registers::t1}; +static constexpr Register t2{Registers::t2}; +static constexpr Register t3{Registers::t3}; +static constexpr Register t4{Registers::ta0}; +static constexpr Register t5{Registers::ta1}; +static constexpr Register t6{Registers::ta2}; +static constexpr Register t7{Registers::ta3}; +static constexpr Register s0{Registers::s0}; +static constexpr Register s1{Registers::s1}; +static constexpr Register s2{Registers::s2}; +static constexpr Register s3{Registers::s3}; +static constexpr Register s4{Registers::s4}; +static constexpr Register s5{Registers::s5}; +static constexpr Register s6{Registers::s6}; +static constexpr Register s7{Registers::s7}; +static constexpr Register t8{Registers::t8}; +static constexpr Register t9{Registers::t9}; +static constexpr Register k0{Registers::k0}; +static constexpr Register k1{Registers::k1}; +static constexpr Register gp{Registers::gp}; +static constexpr Register sp{Registers::sp}; +static constexpr Register fp{Registers::fp}; +static constexpr Register ra{Registers::ra}; + +static constexpr Register ScratchRegister = at; +static constexpr Register SecondScratchReg = t8; + +// Helper classes for ScratchRegister usage. Asserts that only one piece +// of code thinks it has exclusive ownership of each scratch register. +struct ScratchRegisterScope : public AutoRegisterScope { + explicit ScratchRegisterScope(MacroAssembler& masm) + : AutoRegisterScope(masm, ScratchRegister) {} +}; +struct SecondScratchRegisterScope : public AutoRegisterScope { + explicit SecondScratchRegisterScope(MacroAssembler& masm) + : AutoRegisterScope(masm, SecondScratchReg) {} +}; + +// Use arg reg from EnterJIT function as OsrFrameReg. +static constexpr Register OsrFrameReg = a3; +static constexpr Register CallTempReg0 = t0; +static constexpr Register CallTempReg1 = t1; +static constexpr Register CallTempReg2 = t2; +static constexpr Register CallTempReg3 = t3; + +static constexpr Register IntArgReg0 = a0; +static constexpr Register IntArgReg1 = a1; +static constexpr Register IntArgReg2 = a2; +static constexpr Register IntArgReg3 = a3; +static constexpr Register IntArgReg4 = a4; +static constexpr Register IntArgReg5 = a5; +static constexpr Register IntArgReg6 = a6; +static constexpr Register IntArgReg7 = a7; +static constexpr Register GlobalReg = s6; // used by Odin +static constexpr Register HeapReg = s7; // used by Odin + +static constexpr Register PreBarrierReg = a1; + +static constexpr Register InvalidReg{Registers::invalid_reg}; +static constexpr FloatRegister InvalidFloatReg; + +static constexpr Register StackPointer = sp; +static constexpr Register FramePointer = fp; +static constexpr Register ReturnReg = v0; +static constexpr FloatRegister ReturnSimd128Reg = InvalidFloatReg; +static constexpr FloatRegister ScratchSimd128Reg = InvalidFloatReg; + +// A bias applied to the GlobalReg to allow the use of instructions with small +// negative immediate offsets which doubles the range of global data that can be +// accessed with a single instruction. +static const int32_t WasmGlobalRegBias = 32768; + +// Registerd used in RegExpMatcher instruction (do not use JSReturnOperand). +static constexpr Register RegExpMatcherRegExpReg = CallTempReg0; +static constexpr Register RegExpMatcherStringReg = CallTempReg1; +static constexpr Register RegExpMatcherLastIndexReg = CallTempReg2; + +// Registerd used in RegExpTester instruction (do not use ReturnReg). +static constexpr Register RegExpTesterRegExpReg = CallTempReg0; +static constexpr Register RegExpTesterStringReg = CallTempReg1; +static constexpr Register RegExpTesterLastIndexReg = CallTempReg2; + +static constexpr uint32_t CodeAlignment = 8; + +/* clang-format off */ +// MIPS instruction types +// +---------------------------------------------------------------+ +// | 6 | 5 | 5 | 5 | 5 | 6 | +// +---------------------------------------------------------------+ +// Register type | Opcode | Rs | Rt | Rd | Sa | Function | +// +---------------------------------------------------------------+ +// | 6 | 5 | 5 | 16 | +// +---------------------------------------------------------------+ +// Immediate type | Opcode | Rs | Rt | 2's complement constant | +// +---------------------------------------------------------------+ +// | 6 | 26 | +// +---------------------------------------------------------------+ +// Jump type | Opcode | jump_target | +// +---------------------------------------------------------------+ +// 31 bit bit 0 +/* clang-format on */ + +// MIPS instruction encoding constants. +static const uint32_t OpcodeShift = 26; +static const uint32_t OpcodeBits = 6; +static const uint32_t RSShift = 21; +static const uint32_t RSBits = 5; +static const uint32_t RTShift = 16; +static const uint32_t RTBits = 5; +static const uint32_t RDShift = 11; +static const uint32_t RDBits = 5; +static const uint32_t RZShift = 0; +static const uint32_t RZBits = 5; +static const uint32_t SAShift = 6; +static const uint32_t SABits = 5; +static const uint32_t FunctionShift = 0; +static const uint32_t FunctionBits = 6; +static const uint32_t Imm16Shift = 0; +static const uint32_t Imm16Bits = 16; +static const uint32_t Imm26Shift = 0; +static const uint32_t Imm26Bits = 26; +static const uint32_t Imm28Shift = 0; +static const uint32_t Imm28Bits = 28; +static const uint32_t ImmFieldShift = 2; +static const uint32_t FRBits = 5; +static const uint32_t FRShift = 21; +static const uint32_t FSShift = 11; +static const uint32_t FSBits = 5; +static const uint32_t FTShift = 16; +static const uint32_t FTBits = 5; +static const uint32_t FDShift = 6; +static const uint32_t FDBits = 5; +static const uint32_t FCccShift = 8; +static const uint32_t FCccBits = 3; +static const uint32_t FBccShift = 18; +static const uint32_t FBccBits = 3; +static const uint32_t FBtrueShift = 16; +static const uint32_t FBtrueBits = 1; +static const uint32_t FccMask = 0x7; +static const uint32_t FccShift = 2; + +// MIPS instruction field bit masks. +static const uint32_t OpcodeMask = ((1 << OpcodeBits) - 1) << OpcodeShift; +static const uint32_t Imm16Mask = ((1 << Imm16Bits) - 1) << Imm16Shift; +static const uint32_t Imm26Mask = ((1 << Imm26Bits) - 1) << Imm26Shift; +static const uint32_t Imm28Mask = ((1 << Imm28Bits) - 1) << Imm28Shift; +static const uint32_t RSMask = ((1 << RSBits) - 1) << RSShift; +static const uint32_t RTMask = ((1 << RTBits) - 1) << RTShift; +static const uint32_t RDMask = ((1 << RDBits) - 1) << RDShift; +static const uint32_t SAMask = ((1 << SABits) - 1) << SAShift; +static const uint32_t FunctionMask = ((1 << FunctionBits) - 1) << FunctionShift; +static const uint32_t RegMask = Registers::Total - 1; + +static const uint32_t BREAK_STACK_UNALIGNED = 1; +static const uint32_t MAX_BREAK_CODE = 1024 - 1; +static const uint32_t WASM_TRAP = 6; // BRK_OVERFLOW + +class Instruction; +class InstReg; +class InstImm; +class InstJump; + +uint32_t RS(Register r); +uint32_t RT(Register r); +uint32_t RT(FloatRegister r); +uint32_t RD(Register r); +uint32_t RD(FloatRegister r); +uint32_t RZ(Register r); +uint32_t RZ(FloatRegister r); +uint32_t SA(uint32_t value); +uint32_t SA(FloatRegister r); +uint32_t FS(uint32_t value); + +Register toRS(Instruction& i); +Register toRT(Instruction& i); +Register toRD(Instruction& i); +Register toR(Instruction& i); + +// MIPS enums for instruction fields +enum OpcodeField { + op_special = 0 << OpcodeShift, + op_regimm = 1 << OpcodeShift, + + op_j = 2 << OpcodeShift, + op_jal = 3 << OpcodeShift, + op_beq = 4 << OpcodeShift, + op_bne = 5 << OpcodeShift, + op_blez = 6 << OpcodeShift, + op_bgtz = 7 << OpcodeShift, + + op_addi = 8 << OpcodeShift, + op_addiu = 9 << OpcodeShift, + op_slti = 10 << OpcodeShift, + op_sltiu = 11 << OpcodeShift, + op_andi = 12 << OpcodeShift, + op_ori = 13 << OpcodeShift, + op_xori = 14 << OpcodeShift, + op_lui = 15 << OpcodeShift, + + op_cop1 = 17 << OpcodeShift, + op_cop1x = 19 << OpcodeShift, + + op_beql = 20 << OpcodeShift, + op_bnel = 21 << OpcodeShift, + op_blezl = 22 << OpcodeShift, + op_bgtzl = 23 << OpcodeShift, + + op_daddi = 24 << OpcodeShift, + op_daddiu = 25 << OpcodeShift, + + op_ldl = 26 << OpcodeShift, + op_ldr = 27 << OpcodeShift, + + op_special2 = 28 << OpcodeShift, + op_special3 = 31 << OpcodeShift, + + op_lb = 32 << OpcodeShift, + op_lh = 33 << OpcodeShift, + op_lwl = 34 << OpcodeShift, + op_lw = 35 << OpcodeShift, + op_lbu = 36 << OpcodeShift, + op_lhu = 37 << OpcodeShift, + op_lwr = 38 << OpcodeShift, + op_lwu = 39 << OpcodeShift, + op_sb = 40 << OpcodeShift, + op_sh = 41 << OpcodeShift, + op_swl = 42 << OpcodeShift, + op_sw = 43 << OpcodeShift, + op_sdl = 44 << OpcodeShift, + op_sdr = 45 << OpcodeShift, + op_swr = 46 << OpcodeShift, + + op_ll = 48 << OpcodeShift, + op_lwc1 = 49 << OpcodeShift, + op_lwc2 = 50 << OpcodeShift, + op_lld = 52 << OpcodeShift, + op_ldc1 = 53 << OpcodeShift, + op_ldc2 = 54 << OpcodeShift, + op_ld = 55 << OpcodeShift, + + op_sc = 56 << OpcodeShift, + op_swc1 = 57 << OpcodeShift, + op_swc2 = 58 << OpcodeShift, + op_scd = 60 << OpcodeShift, + op_sdc1 = 61 << OpcodeShift, + op_sdc2 = 62 << OpcodeShift, + op_sd = 63 << OpcodeShift, +}; + +enum RSField { + rs_zero = 0 << RSShift, + // cop1 encoding of RS field. + rs_mfc1 = 0 << RSShift, + rs_one = 1 << RSShift, + rs_dmfc1 = 1 << RSShift, + rs_cfc1 = 2 << RSShift, + rs_mfhc1 = 3 << RSShift, + rs_mtc1 = 4 << RSShift, + rs_dmtc1 = 5 << RSShift, + rs_ctc1 = 6 << RSShift, + rs_mthc1 = 7 << RSShift, + rs_bc1 = 8 << RSShift, + rs_f = 0x9 << RSShift, + rs_t = 0xd << RSShift, + rs_s_r6 = 20 << RSShift, + rs_d_r6 = 21 << RSShift, + rs_s = 16 << RSShift, + rs_d = 17 << RSShift, + rs_w = 20 << RSShift, + rs_l = 21 << RSShift, + rs_ps = 22 << RSShift +}; + +enum RTField { + rt_zero = 0 << RTShift, + // regimm encoding of RT field. + rt_bltz = 0 << RTShift, + rt_bgez = 1 << RTShift, + rt_bltzal = 16 << RTShift, + rt_bgezal = 17 << RTShift +}; + +enum FunctionField { + // special encoding of function field. + ff_sll = 0, + ff_movci = 1, + ff_srl = 2, + ff_sra = 3, + ff_sllv = 4, + ff_srlv = 6, + ff_srav = 7, + + ff_jr = 8, + ff_jalr = 9, + ff_movz = 10, + ff_movn = 11, + ff_break = 13, + ff_sync = 15, + + ff_mfhi = 16, + ff_mflo = 18, + + ff_dsllv = 20, + ff_dsrlv = 22, + ff_dsrav = 23, + + ff_mult = 24, + ff_multu = 25, + + ff_mulu = 25, + ff_muh = 24, + ff_muhu = 25, + ff_dmul = 28, + ff_dmulu = 29, + ff_dmuh = 28, + ff_dmuhu = 29, + + ff_div = 26, + ff_mod = 26, + ff_divu = 27, + ff_modu = 27, + ff_dmult = 28, + ff_dmultu = 29, + ff_ddiv = 30, + ff_dmod = 30, + ff_ddivu = 31, + ff_dmodu = 31, + + ff_add = 32, + ff_addu = 33, + ff_sub = 34, + ff_subu = 35, + ff_and = 36, + ff_or = 37, + ff_xor = 38, + ff_nor = 39, + + ff_slt = 42, + ff_sltu = 43, + ff_dadd = 44, + ff_daddu = 45, + ff_dsub = 46, + ff_dsubu = 47, + + ff_tge = 48, + ff_tgeu = 49, + ff_tlt = 50, + ff_tltu = 51, + ff_teq = 52, + ff_seleqz = 53, + ff_tne = 54, + ff_selnez = 55, + ff_dsll = 56, + ff_dsrl = 58, + ff_dsra = 59, + ff_dsll32 = 60, + ff_dsrl32 = 62, + ff_dsra32 = 63, + + // special2 encoding of function field. + ff_madd = 0, + ff_maddu = 1, +#ifdef MIPSR6 + ff_clz = 16, + ff_dclz = 18, + ff_mul = 24, +#else + ff_mul = 2, + ff_clz = 32, + ff_dclz = 36, +#endif + ff_clo = 33, + + // special3 encoding of function field. + ff_ext = 0, + ff_dextm = 1, + ff_dextu = 2, + ff_dext = 3, + ff_ins = 4, + ff_dinsm = 5, + ff_dinsu = 6, + ff_dins = 7, + ff_bshfl = 32, + ff_dbshfl = 36, + ff_sc = 38, + ff_scd = 39, + ff_ll = 54, + ff_lld = 55, + + // cop1 encoding of function field. + ff_add_fmt = 0, + ff_sub_fmt = 1, + ff_mul_fmt = 2, + ff_div_fmt = 3, + ff_sqrt_fmt = 4, + ff_abs_fmt = 5, + ff_mov_fmt = 6, + ff_neg_fmt = 7, + + ff_round_l_fmt = 8, + ff_trunc_l_fmt = 9, + ff_ceil_l_fmt = 10, + ff_floor_l_fmt = 11, + + ff_round_w_fmt = 12, + ff_trunc_w_fmt = 13, + ff_ceil_w_fmt = 14, + ff_floor_w_fmt = 15, + + ff_movf_fmt = 17, + ff_movz_fmt = 18, + ff_movn_fmt = 19, + + ff_min = 28, + ff_max = 30, + + ff_cvt_s_fmt = 32, + ff_cvt_d_fmt = 33, + ff_cvt_w_fmt = 36, + ff_cvt_l_fmt = 37, + ff_cvt_ps_s = 38, + +#ifdef MIPSR6 + ff_c_f_fmt = 0, + ff_c_un_fmt = 1, + ff_c_eq_fmt = 2, + ff_c_ueq_fmt = 3, + ff_c_olt_fmt = 4, + ff_c_ult_fmt = 5, + ff_c_ole_fmt = 6, + ff_c_ule_fmt = 7, +#else + ff_c_f_fmt = 48, + ff_c_un_fmt = 49, + ff_c_eq_fmt = 50, + ff_c_ueq_fmt = 51, + ff_c_olt_fmt = 52, + ff_c_ult_fmt = 53, + ff_c_ole_fmt = 54, + ff_c_ule_fmt = 55, +#endif + + ff_madd_s = 32, + ff_madd_d = 33, + + // Loongson encoding of function field. + ff_gsxbx = 0, + ff_gsxhx = 1, + ff_gsxwx = 2, + ff_gsxdx = 3, + ff_gsxwlc1 = 4, + ff_gsxwrc1 = 5, + ff_gsxdlc1 = 6, + ff_gsxdrc1 = 7, + ff_gsxwxc1 = 6, + ff_gsxdxc1 = 7, + ff_gsxq = 0x20, + ff_gsxqc1 = 0x8020, + + ff_null = 0 +}; + +class Operand; + +// A BOffImm16 is a 16 bit immediate that is used for branches. +class BOffImm16 { + uint32_t data; + + public: + uint32_t encode() { + MOZ_ASSERT(!isInvalid()); + return data; + } + int32_t decode() { + MOZ_ASSERT(!isInvalid()); + return (int32_t(data << 18) >> 16) + 4; + } + + explicit BOffImm16(int offset) : data((offset - 4) >> 2 & Imm16Mask) { + MOZ_ASSERT((offset & 0x3) == 0); + MOZ_ASSERT(IsInRange(offset)); + } + static bool IsInRange(int offset) { + if ((offset - 4) < int(unsigned(INT16_MIN) << 2)) { + return false; + } + if ((offset - 4) > (INT16_MAX << 2)) { + return false; + } + return true; + } + static const uint32_t INVALID = 0x00020000; + BOffImm16() : data(INVALID) {} + + bool isInvalid() { return data == INVALID; } + Instruction* getDest(Instruction* src) const; + + BOffImm16(InstImm inst); +}; + +// A JOffImm26 is a 26 bit immediate that is used for unconditional jumps. +class JOffImm26 { + uint32_t data; + + public: + uint32_t encode() { + MOZ_ASSERT(!isInvalid()); + return data; + } + int32_t decode() { + MOZ_ASSERT(!isInvalid()); + return (int32_t(data << 8) >> 6) + 4; + } + + explicit JOffImm26(int offset) : data((offset - 4) >> 2 & Imm26Mask) { + MOZ_ASSERT((offset & 0x3) == 0); + MOZ_ASSERT(IsInRange(offset)); + } + static bool IsInRange(int offset) { + if ((offset - 4) < -536870912) { + return false; + } + if ((offset - 4) > 536870908) { + return false; + } + return true; + } + static const uint32_t INVALID = 0x20000000; + JOffImm26() : data(INVALID) {} + + bool isInvalid() { return data == INVALID; } + Instruction* getDest(Instruction* src); +}; + +class Imm16 { + uint16_t value; + + public: + Imm16(); + Imm16(uint32_t imm) : value(imm) {} + uint32_t encode() { return value; } + int32_t decodeSigned() { return value; } + uint32_t decodeUnsigned() { return value; } + static bool IsInSignedRange(int32_t imm) { + return imm >= INT16_MIN && imm <= INT16_MAX; + } + static bool IsInUnsignedRange(uint32_t imm) { return imm <= UINT16_MAX; } + static Imm16 Lower(Imm32 imm) { return Imm16(imm.value & 0xffff); } + static Imm16 Upper(Imm32 imm) { return Imm16((imm.value >> 16) & 0xffff); } +}; + +class Imm8 { + uint8_t value; + + public: + Imm8(); + Imm8(uint32_t imm) : value(imm) {} + uint32_t encode(uint32_t shift) { return value << shift; } + int32_t decodeSigned() { return value; } + uint32_t decodeUnsigned() { return value; } + static bool IsInSignedRange(int32_t imm) { + return imm >= INT8_MIN && imm <= INT8_MAX; + } + static bool IsInUnsignedRange(uint32_t imm) { return imm <= UINT8_MAX; } + static Imm8 Lower(Imm16 imm) { return Imm8(imm.decodeSigned() & 0xff); } + static Imm8 Upper(Imm16 imm) { + return Imm8((imm.decodeSigned() >> 8) & 0xff); + } +}; + +class GSImm13 { + uint16_t value; + + public: + GSImm13(); + GSImm13(uint32_t imm) : value(imm & ~0xf) {} + uint32_t encode(uint32_t shift) { return ((value >> 4) & 0x1ff) << shift; } + int32_t decodeSigned() { return value; } + uint32_t decodeUnsigned() { return value; } + static bool IsInRange(int32_t imm) { + return imm >= int32_t(uint32_t(-256) << 4) && imm <= (255 << 4); + } +}; + +class Operand { + public: + enum Tag { REG, FREG, MEM }; + + private: + Tag tag : 3; + uint32_t reg : 5; + int32_t offset; + + public: + Operand(Register reg_) : tag(REG), reg(reg_.code()) {} + + Operand(FloatRegister freg) : tag(FREG), reg(freg.code()) {} + + Operand(Register base, Imm32 off) + : tag(MEM), reg(base.code()), offset(off.value) {} + + Operand(Register base, int32_t off) + : tag(MEM), reg(base.code()), offset(off) {} + + Operand(const Address& addr) + : tag(MEM), reg(addr.base.code()), offset(addr.offset) {} + + Tag getTag() const { return tag; } + + Register toReg() const { + MOZ_ASSERT(tag == REG); + return Register::FromCode(reg); + } + + FloatRegister toFReg() const { + MOZ_ASSERT(tag == FREG); + return FloatRegister::FromCode(reg); + } + + void toAddr(Register* r, Imm32* dest) const { + MOZ_ASSERT(tag == MEM); + *r = Register::FromCode(reg); + *dest = Imm32(offset); + } + Address toAddress() const { + MOZ_ASSERT(tag == MEM); + return Address(Register::FromCode(reg), offset); + } + int32_t disp() const { + MOZ_ASSERT(tag == MEM); + return offset; + } + + int32_t base() const { + MOZ_ASSERT(tag == MEM); + return reg; + } + Register baseReg() const { + MOZ_ASSERT(tag == MEM); + return Register::FromCode(reg); + } +}; + +inline Imm32 Imm64::firstHalf() const { return low(); } + +inline Imm32 Imm64::secondHalf() const { return hi(); } + +static constexpr int32_t SliceSize = 1024; +typedef js::jit::AssemblerBuffer<SliceSize, Instruction> MIPSBuffer; + +class MIPSBufferWithExecutableCopy : public MIPSBuffer { + public: + void executableCopy(uint8_t* buffer) { + if (this->oom()) { + return; + } + + for (Slice* cur = head; cur != nullptr; cur = cur->getNext()) { + memcpy(buffer, &cur->instructions, cur->length()); + buffer += cur->length(); + } + } + + bool appendRawCode(const uint8_t* code, size_t numBytes) { + if (this->oom()) { + return false; + } + while (numBytes > SliceSize) { + this->putBytes(SliceSize, code); + numBytes -= SliceSize; + code += SliceSize; + } + this->putBytes(numBytes, code); + return !this->oom(); + } +}; + +class AssemblerMIPSShared : public AssemblerShared { + public: + enum Condition { + Equal, + NotEqual, + Above, + AboveOrEqual, + Below, + BelowOrEqual, + GreaterThan, + GreaterThanOrEqual, + LessThan, + LessThanOrEqual, + Overflow, + CarrySet, + CarryClear, + Signed, + NotSigned, + Zero, + NonZero, + Always, + }; + + enum DoubleCondition { + // These conditions will only evaluate to true if the comparison is ordered + // - i.e. neither operand is NaN. + DoubleOrdered, + DoubleEqual, + DoubleNotEqual, + DoubleGreaterThan, + DoubleGreaterThanOrEqual, + DoubleLessThan, + DoubleLessThanOrEqual, + // If either operand is NaN, these conditions always evaluate to true. + DoubleUnordered, + DoubleEqualOrUnordered, + DoubleNotEqualOrUnordered, + DoubleGreaterThanOrUnordered, + DoubleGreaterThanOrEqualOrUnordered, + DoubleLessThanOrUnordered, + DoubleLessThanOrEqualOrUnordered + }; + + enum FPConditionBit { FCC0 = 0, FCC1, FCC2, FCC3, FCC4, FCC5, FCC6, FCC7 }; + + enum FPControl { + FIR = 0, + UFR, + UNFR = 4, + FCCR = 25, + FEXR, + FENR = 28, + FCSR = 31 + }; + + enum FCSRBit { CauseI = 12, CauseU, CauseO, CauseZ, CauseV }; + + enum FloatFormat { SingleFloat, DoubleFloat }; + + enum JumpOrCall { BranchIsJump, BranchIsCall }; + + enum FloatTestKind { TestForTrue, TestForFalse }; + + // :( this should be protected, but since CodeGenerator + // wants to use it, It needs to go out here :( + + BufferOffset nextOffset() { return m_buffer.nextOffset(); } + + protected: + Instruction* editSrc(BufferOffset bo) { return m_buffer.getInst(bo); } + + // structure for fixing up pc-relative loads/jumps when a the machine code + // gets moved (executable copy, gc, etc.) + struct RelativePatch { + // the offset within the code buffer where the value is loaded that + // we want to fix-up + BufferOffset offset; + void* target; + RelocationKind kind; + + RelativePatch(BufferOffset offset, void* target, RelocationKind kind) + : offset(offset), target(target), kind(kind) {} + }; + + js::Vector<RelativePatch, 8, SystemAllocPolicy> jumps_; + + CompactBufferWriter jumpRelocations_; + CompactBufferWriter dataRelocations_; + + MIPSBufferWithExecutableCopy m_buffer; + +#ifdef JS_JITSPEW + Sprinter* printer; +#endif + + public: + AssemblerMIPSShared() + : m_buffer(), +#ifdef JS_JITSPEW + printer(nullptr), +#endif + isFinished(false) { + } + + static Condition InvertCondition(Condition cond); + static DoubleCondition InvertCondition(DoubleCondition cond); + + // As opposed to x86/x64 version, the data relocation has to be executed + // before to recover the pointer, and not after. + void writeDataRelocation(ImmGCPtr ptr) { + // Raw GC pointer relocations and Value relocations both end up in + // TraceOneDataRelocation. + if (ptr.value) { + if (gc::IsInsideNursery(ptr.value)) { + embedsNurseryPointers_ = true; + } + dataRelocations_.writeUnsigned(nextOffset().getOffset()); + } + } + + void assertNoGCThings() const { +#ifdef DEBUG + MOZ_ASSERT(dataRelocations_.length() == 0); + for (auto& j : jumps_) { + MOZ_ASSERT(j.kind == RelocationKind::HARDCODED); + } +#endif + } + + public: + void setUnlimitedBuffer() { m_buffer.setUnlimited(); } + bool oom() const; + + void setPrinter(Sprinter* sp) { +#ifdef JS_JITSPEW + printer = sp; +#endif + } + +#ifdef JS_JITSPEW + inline void spew(const char* fmt, ...) MOZ_FORMAT_PRINTF(2, 3) { + if (MOZ_UNLIKELY(printer || JitSpewEnabled(JitSpew_Codegen))) { + va_list va; + va_start(va, fmt); + spew(fmt, va); + va_end(va); + } + } + + void decodeBranchInstAndSpew(InstImm branch); +#else + MOZ_ALWAYS_INLINE void spew(const char* fmt, ...) MOZ_FORMAT_PRINTF(2, 3) {} +#endif + +#ifdef JS_JITSPEW + MOZ_COLD void spew(const char* fmt, va_list va) MOZ_FORMAT_PRINTF(2, 0) { + // Buffer to hold the formatted string. Note that this may contain + // '%' characters, so do not pass it directly to printf functions. + char buf[200]; + + int i = VsprintfLiteral(buf, fmt, va); + if (i > -1) { + if (printer) { + printer->printf("%s\n", buf); + } + js::jit::JitSpew(js::jit::JitSpew_Codegen, "%s", buf); + } + } +#endif + + Register getStackPointer() const { return StackPointer; } + + protected: + bool isFinished; + + public: + void finish(); + bool appendRawCode(const uint8_t* code, size_t numBytes); + bool reserve(size_t size); + bool swapBuffer(wasm::Bytes& bytes); + void executableCopy(void* buffer); + void copyJumpRelocationTable(uint8_t* dest); + void copyDataRelocationTable(uint8_t* dest); + + // Size of the instruction stream, in bytes. + size_t size() const; + // Size of the jump relocation table, in bytes. + size_t jumpRelocationTableBytes() const; + size_t dataRelocationTableBytes() const; + + // Size of the data table, in bytes. + size_t bytesNeeded() const; + + // Write a blob of binary into the instruction stream *OR* + // into a destination address. If dest is nullptr (the default), then the + // instruction gets written into the instruction stream. If dest is not null + // it is interpreted as a pointer to the location that we want the + // instruction to be written. + BufferOffset writeInst(uint32_t x, uint32_t* dest = nullptr); + // A static variant for the cases where we don't want to have an assembler + // object at all. Normally, you would use the dummy (nullptr) object. + static void WriteInstStatic(uint32_t x, uint32_t* dest); + + public: + BufferOffset haltingAlign(int alignment); + BufferOffset nopAlign(int alignment); + BufferOffset as_nop(); + + // Branch and jump instructions + BufferOffset as_bal(BOffImm16 off); + BufferOffset as_b(BOffImm16 off); + + InstImm getBranchCode(JumpOrCall jumpOrCall); + InstImm getBranchCode(Register s, Register t, Condition c); + InstImm getBranchCode(Register s, Condition c); + InstImm getBranchCode(FloatTestKind testKind, FPConditionBit fcc); + + BufferOffset as_j(JOffImm26 off); + BufferOffset as_jal(JOffImm26 off); + + BufferOffset as_jr(Register rs); + BufferOffset as_jalr(Register rs); + + // Arithmetic instructions + BufferOffset as_addu(Register rd, Register rs, Register rt); + BufferOffset as_addiu(Register rd, Register rs, int32_t j); + BufferOffset as_daddu(Register rd, Register rs, Register rt); + BufferOffset as_daddiu(Register rd, Register rs, int32_t j); + BufferOffset as_subu(Register rd, Register rs, Register rt); + BufferOffset as_dsubu(Register rd, Register rs, Register rt); + BufferOffset as_mult(Register rs, Register rt); + BufferOffset as_multu(Register rs, Register rt); + BufferOffset as_dmult(Register rs, Register rt); + BufferOffset as_dmultu(Register rs, Register rt); + BufferOffset as_div(Register rs, Register rt); + BufferOffset as_divu(Register rs, Register rt); + BufferOffset as_mul(Register rd, Register rs, Register rt); + BufferOffset as_madd(Register rs, Register rt); + BufferOffset as_maddu(Register rs, Register rt); + BufferOffset as_ddiv(Register rs, Register rt); + BufferOffset as_ddivu(Register rs, Register rt); + + BufferOffset as_muh(Register rd, Register rs, Register rt); + BufferOffset as_muhu(Register rd, Register rs, Register rt); + BufferOffset as_mulu(Register rd, Register rs, Register rt); + BufferOffset as_dmuh(Register rd, Register rs, Register rt); + BufferOffset as_dmuhu(Register rd, Register rs, Register rt); + BufferOffset as_dmul(Register rd, Register rs, Register rt); + BufferOffset as_dmulu(Register rd, Register rs, Register rt); + BufferOffset as_div(Register rd, Register rs, Register rt); + BufferOffset as_divu(Register rd, Register rs, Register rt); + BufferOffset as_mod(Register rd, Register rs, Register rt); + BufferOffset as_modu(Register rd, Register rs, Register rt); + BufferOffset as_ddiv(Register rd, Register rs, Register rt); + BufferOffset as_ddivu(Register rd, Register rs, Register rt); + BufferOffset as_dmod(Register rd, Register rs, Register rt); + BufferOffset as_dmodu(Register rd, Register rs, Register rt); + + // Logical instructions + BufferOffset as_and(Register rd, Register rs, Register rt); + BufferOffset as_or(Register rd, Register rs, Register rt); + BufferOffset as_xor(Register rd, Register rs, Register rt); + BufferOffset as_nor(Register rd, Register rs, Register rt); + + BufferOffset as_andi(Register rd, Register rs, int32_t j); + BufferOffset as_ori(Register rd, Register rs, int32_t j); + BufferOffset as_xori(Register rd, Register rs, int32_t j); + BufferOffset as_lui(Register rd, int32_t j); + + // Shift instructions + // as_sll(zero, zero, x) instructions are reserved as nop + BufferOffset as_sll(Register rd, Register rt, uint16_t sa); + BufferOffset as_dsll(Register rd, Register rt, uint16_t sa); + BufferOffset as_dsll32(Register rd, Register rt, uint16_t sa); + BufferOffset as_sllv(Register rd, Register rt, Register rs); + BufferOffset as_dsllv(Register rd, Register rt, Register rs); + BufferOffset as_srl(Register rd, Register rt, uint16_t sa); + BufferOffset as_dsrl(Register rd, Register rt, uint16_t sa); + BufferOffset as_dsrl32(Register rd, Register rt, uint16_t sa); + BufferOffset as_srlv(Register rd, Register rt, Register rs); + BufferOffset as_dsrlv(Register rd, Register rt, Register rs); + BufferOffset as_sra(Register rd, Register rt, uint16_t sa); + BufferOffset as_dsra(Register rd, Register rt, uint16_t sa); + BufferOffset as_dsra32(Register rd, Register rt, uint16_t sa); + BufferOffset as_srav(Register rd, Register rt, Register rs); + BufferOffset as_rotr(Register rd, Register rt, uint16_t sa); + BufferOffset as_rotrv(Register rd, Register rt, Register rs); + BufferOffset as_dsrav(Register rd, Register rt, Register rs); + BufferOffset as_drotr(Register rd, Register rt, uint16_t sa); + BufferOffset as_drotr32(Register rd, Register rt, uint16_t sa); + BufferOffset as_drotrv(Register rd, Register rt, Register rs); + + // Load and store instructions + BufferOffset as_lb(Register rd, Register rs, int16_t off); + BufferOffset as_lbu(Register rd, Register rs, int16_t off); + BufferOffset as_lh(Register rd, Register rs, int16_t off); + BufferOffset as_lhu(Register rd, Register rs, int16_t off); + BufferOffset as_lw(Register rd, Register rs, int16_t off); + BufferOffset as_lwu(Register rd, Register rs, int16_t off); + BufferOffset as_lwl(Register rd, Register rs, int16_t off); + BufferOffset as_lwr(Register rd, Register rs, int16_t off); + BufferOffset as_ll(Register rd, Register rs, int16_t off); + BufferOffset as_lld(Register rd, Register rs, int16_t off); + BufferOffset as_ld(Register rd, Register rs, int16_t off); + BufferOffset as_ldl(Register rd, Register rs, int16_t off); + BufferOffset as_ldr(Register rd, Register rs, int16_t off); + BufferOffset as_sb(Register rd, Register rs, int16_t off); + BufferOffset as_sh(Register rd, Register rs, int16_t off); + BufferOffset as_sw(Register rd, Register rs, int16_t off); + BufferOffset as_swl(Register rd, Register rs, int16_t off); + BufferOffset as_swr(Register rd, Register rs, int16_t off); + BufferOffset as_sc(Register rd, Register rs, int16_t off); + BufferOffset as_scd(Register rd, Register rs, int16_t off); + BufferOffset as_sd(Register rd, Register rs, int16_t off); + BufferOffset as_sdl(Register rd, Register rs, int16_t off); + BufferOffset as_sdr(Register rd, Register rs, int16_t off); + + // Loongson-specific load and store instructions + BufferOffset as_gslbx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gssbx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gslhx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gsshx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gslwx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gsswx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gsldx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gssdx(Register rd, Register rs, Register ri, int16_t off); + BufferOffset as_gslq(Register rh, Register rl, Register rs, int16_t off); + BufferOffset as_gssq(Register rh, Register rl, Register rs, int16_t off); + + // Move from HI/LO register. + BufferOffset as_mfhi(Register rd); + BufferOffset as_mflo(Register rd); + + // Set on less than. + BufferOffset as_slt(Register rd, Register rs, Register rt); + BufferOffset as_sltu(Register rd, Register rs, Register rt); + BufferOffset as_slti(Register rd, Register rs, int32_t j); + BufferOffset as_sltiu(Register rd, Register rs, uint32_t j); + + // Conditional move. + BufferOffset as_movz(Register rd, Register rs, Register rt); + BufferOffset as_movn(Register rd, Register rs, Register rt); + BufferOffset as_movt(Register rd, Register rs, uint16_t cc = 0); + BufferOffset as_movf(Register rd, Register rs, uint16_t cc = 0); + BufferOffset as_seleqz(Register rd, Register rs, Register rt); + BufferOffset as_selnez(Register rd, Register rs, Register rt); + + // Bit twiddling. + BufferOffset as_clz(Register rd, Register rs); + BufferOffset as_dclz(Register rd, Register rs); + BufferOffset as_wsbh(Register rd, Register rt); + BufferOffset as_dsbh(Register rd, Register rt); + BufferOffset as_dshd(Register rd, Register rt); + BufferOffset as_ins(Register rt, Register rs, uint16_t pos, uint16_t size); + BufferOffset as_dins(Register rt, Register rs, uint16_t pos, uint16_t size); + BufferOffset as_dinsm(Register rt, Register rs, uint16_t pos, uint16_t size); + BufferOffset as_dinsu(Register rt, Register rs, uint16_t pos, uint16_t size); + BufferOffset as_ext(Register rt, Register rs, uint16_t pos, uint16_t size); + BufferOffset as_dext(Register rt, Register rs, uint16_t pos, uint16_t size); + BufferOffset as_dextm(Register rt, Register rs, uint16_t pos, uint16_t size); + BufferOffset as_dextu(Register rt, Register rs, uint16_t pos, uint16_t size); + + // Sign extend + BufferOffset as_seb(Register rd, Register rt); + BufferOffset as_seh(Register rd, Register rt); + + // FP instructions + + BufferOffset as_ldc1(FloatRegister ft, Register base, int32_t off); + BufferOffset as_sdc1(FloatRegister ft, Register base, int32_t off); + + BufferOffset as_lwc1(FloatRegister ft, Register base, int32_t off); + BufferOffset as_swc1(FloatRegister ft, Register base, int32_t off); + + // Loongson-specific FP load and store instructions + BufferOffset as_gsldl(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gsldr(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gssdl(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gssdr(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gslsl(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gslsr(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gsssl(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gsssr(FloatRegister fd, Register base, int32_t off); + BufferOffset as_gslsx(FloatRegister fd, Register rs, Register ri, + int16_t off); + BufferOffset as_gsssx(FloatRegister fd, Register rs, Register ri, + int16_t off); + BufferOffset as_gsldx(FloatRegister fd, Register rs, Register ri, + int16_t off); + BufferOffset as_gssdx(FloatRegister fd, Register rs, Register ri, + int16_t off); + BufferOffset as_gslq(FloatRegister rh, FloatRegister rl, Register rs, + int16_t off); + BufferOffset as_gssq(FloatRegister rh, FloatRegister rl, Register rs, + int16_t off); + + BufferOffset as_movs(FloatRegister fd, FloatRegister fs); + BufferOffset as_movd(FloatRegister fd, FloatRegister fs); + + BufferOffset as_ctc1(Register rt, FPControl fc); + BufferOffset as_cfc1(Register rt, FPControl fc); + + BufferOffset as_mtc1(Register rt, FloatRegister fs); + BufferOffset as_mfc1(Register rt, FloatRegister fs); + + BufferOffset as_mthc1(Register rt, FloatRegister fs); + BufferOffset as_mfhc1(Register rt, FloatRegister fs); + BufferOffset as_dmtc1(Register rt, FloatRegister fs); + BufferOffset as_dmfc1(Register rt, FloatRegister fs); + + public: + // FP convert instructions + BufferOffset as_ceilws(FloatRegister fd, FloatRegister fs); + BufferOffset as_floorws(FloatRegister fd, FloatRegister fs); + BufferOffset as_roundws(FloatRegister fd, FloatRegister fs); + BufferOffset as_truncws(FloatRegister fd, FloatRegister fs); + BufferOffset as_truncls(FloatRegister fd, FloatRegister fs); + + BufferOffset as_ceilwd(FloatRegister fd, FloatRegister fs); + BufferOffset as_floorwd(FloatRegister fd, FloatRegister fs); + BufferOffset as_roundwd(FloatRegister fd, FloatRegister fs); + BufferOffset as_truncwd(FloatRegister fd, FloatRegister fs); + BufferOffset as_truncld(FloatRegister fd, FloatRegister fs); + + BufferOffset as_cvtdl(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtds(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtdw(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtld(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtls(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtsd(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtsl(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtsw(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtwd(FloatRegister fd, FloatRegister fs); + BufferOffset as_cvtws(FloatRegister fd, FloatRegister fs); + + // FP arithmetic instructions + BufferOffset as_adds(FloatRegister fd, FloatRegister fs, FloatRegister ft); + BufferOffset as_addd(FloatRegister fd, FloatRegister fs, FloatRegister ft); + BufferOffset as_subs(FloatRegister fd, FloatRegister fs, FloatRegister ft); + BufferOffset as_subd(FloatRegister fd, FloatRegister fs, FloatRegister ft); + + BufferOffset as_abss(FloatRegister fd, FloatRegister fs); + BufferOffset as_absd(FloatRegister fd, FloatRegister fs); + BufferOffset as_negs(FloatRegister fd, FloatRegister fs); + BufferOffset as_negd(FloatRegister fd, FloatRegister fs); + + BufferOffset as_muls(FloatRegister fd, FloatRegister fs, FloatRegister ft); + BufferOffset as_muld(FloatRegister fd, FloatRegister fs, FloatRegister ft); + BufferOffset as_divs(FloatRegister fd, FloatRegister fs, FloatRegister ft); + BufferOffset as_divd(FloatRegister fd, FloatRegister fs, FloatRegister ft); + BufferOffset as_sqrts(FloatRegister fd, FloatRegister fs); + BufferOffset as_sqrtd(FloatRegister fd, FloatRegister fs); + + BufferOffset as_max(FloatFormat fmt, FloatRegister fd, FloatRegister fs, + FloatRegister ft); + BufferOffset as_min(FloatFormat fmt, FloatRegister fd, FloatRegister fs, + FloatRegister ft); + + // FP compare instructions + BufferOffset as_cf(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + BufferOffset as_cun(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + BufferOffset as_ceq(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + BufferOffset as_cueq(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + BufferOffset as_colt(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + BufferOffset as_cult(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + BufferOffset as_cole(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + BufferOffset as_cule(FloatFormat fmt, FloatRegister fs, FloatRegister ft, + FPConditionBit fcc = FCC0); + + // FP conditional move. + BufferOffset as_movt(FloatFormat fmt, FloatRegister fd, FloatRegister fs, + FPConditionBit fcc = FCC0); + BufferOffset as_movf(FloatFormat fmt, FloatRegister fd, FloatRegister fs, + FPConditionBit fcc = FCC0); + BufferOffset as_movz(FloatFormat fmt, FloatRegister fd, FloatRegister fs, + Register rt); + BufferOffset as_movn(FloatFormat fmt, FloatRegister fd, FloatRegister fs, + Register rt); + + // Conditional trap operations + BufferOffset as_tge(Register rs, Register rt, uint32_t code = 0); + BufferOffset as_tgeu(Register rs, Register rt, uint32_t code = 0); + BufferOffset as_tlt(Register rs, Register rt, uint32_t code = 0); + BufferOffset as_tltu(Register rs, Register rt, uint32_t code = 0); + BufferOffset as_teq(Register rs, Register rt, uint32_t code = 0); + BufferOffset as_tne(Register rs, Register rt, uint32_t code = 0); + + // label operations + void bind(Label* label, BufferOffset boff = BufferOffset()); + virtual void bind(InstImm* inst, uintptr_t branch, uintptr_t target) = 0; + void bind(CodeLabel* label) { label->target()->bind(currentOffset()); } + uint32_t currentOffset() { return nextOffset().getOffset(); } + void retarget(Label* label, Label* target); + + void call(Label* label); + void call(void* target); + + void as_break(uint32_t code); + void as_sync(uint32_t stype = 0); + + public: + static bool SupportsFloatingPoint() { +#if (defined(__mips_hard_float) && !defined(__mips_single_float)) || \ + defined(JS_SIMULATOR_MIPS32) || defined(JS_SIMULATOR_MIPS64) + return true; +#else + return false; +#endif + } + static bool SupportsUnalignedAccesses() { return true; } + static bool SupportsFastUnalignedFPAccesses() { return false; } + + static bool HasRoundInstruction(RoundingMode mode) { return false; } + + protected: + InstImm invertBranch(InstImm branch, BOffImm16 skipOffset); + void addPendingJump(BufferOffset src, ImmPtr target, RelocationKind kind) { + enoughMemory_ &= jumps_.append(RelativePatch(src, target.value, kind)); + if (kind == RelocationKind::JITCODE) { + jumpRelocations_.writeUnsigned(src.getOffset()); + } + } + + void addLongJump(BufferOffset src, BufferOffset dst) { + CodeLabel cl; + cl.patchAt()->bind(src.getOffset()); + cl.target()->bind(dst.getOffset()); + cl.setLinkMode(CodeLabel::JumpImmediate); + addCodeLabel(std::move(cl)); + } + + public: + void flushBuffer() {} + + void comment(const char* msg) { spew("; %s", msg); } + + static uint32_t NopSize() { return 4; } + + static void PatchWrite_Imm32(CodeLocationLabel label, Imm32 imm); + + static uint32_t AlignDoubleArg(uint32_t offset) { + return (offset + 1U) & ~1U; + } + + static uint8_t* NextInstruction(uint8_t* instruction, + uint32_t* count = nullptr); + + static void ToggleToJmp(CodeLocationLabel inst_); + static void ToggleToCmp(CodeLocationLabel inst_); + + static void UpdateLuiOriValue(Instruction* inst0, Instruction* inst1, + uint32_t value); + + void verifyHeapAccessDisassembly(uint32_t begin, uint32_t end, + const Disassembler::HeapAccess& heapAccess) { + // Implement this if we implement a disassembler. + } +}; // AssemblerMIPSShared + +// sll zero, zero, 0 +const uint32_t NopInst = 0x00000000; + +// An Instruction is a structure for both encoding and decoding any and all +// MIPS instructions. +class Instruction { + protected: + uint32_t data; + + // Standard constructor + Instruction(uint32_t data_) : data(data_) {} + + // You should never create an instruction directly. You should create a + // more specific instruction which will eventually call one of these + // constructors for you. + public: + uint32_t encode() const { return data; } + + void makeNop() { data = NopInst; } + + void setData(uint32_t data) { this->data = data; } + + const Instruction& operator=(const Instruction& src) { + data = src.data; + return *this; + } + + // Extract the one particular bit. + uint32_t extractBit(uint32_t bit) { return (encode() >> bit) & 1; } + // Extract a bit field out of the instruction + uint32_t extractBitField(uint32_t hi, uint32_t lo) { + return (encode() >> lo) & ((2 << (hi - lo)) - 1); + } + // Since all MIPS instructions have opcode, the opcode + // extractor resides in the base class. + uint32_t extractOpcode() { + return extractBitField(OpcodeShift + OpcodeBits - 1, OpcodeShift); + } + // Return the fields at their original place in the instruction encoding. + OpcodeField OpcodeFieldRaw() const { + return static_cast<OpcodeField>(encode() & OpcodeMask); + } + + // Get the next instruction in the instruction stream. + // This does neat things like ignoreconstant pools and their guards. + Instruction* next(); + + // Sometimes, an api wants a uint32_t (or a pointer to it) rather than + // an instruction. raw() just coerces this into a pointer to a uint32_t + const uint32_t* raw() const { return &data; } + uint32_t size() const { return 4; } +}; // Instruction + +// make sure that it is the right size +static_assert(sizeof(Instruction) == 4, + "Size of Instruction class has to be 4 bytes."); + +class InstNOP : public Instruction { + public: + InstNOP() : Instruction(NopInst) {} +}; + +// Class for register type instructions. +class InstReg : public Instruction { + public: + InstReg(OpcodeField op, Register rd, FunctionField ff) + : Instruction(op | RD(rd) | ff) {} + InstReg(OpcodeField op, Register rs, Register rt, FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | ff) {} + InstReg(OpcodeField op, Register rs, Register rt, Register rd, + FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | RD(rd) | ff) {} + InstReg(OpcodeField op, Register rs, Register rt, Register rd, uint32_t sa, + FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | RD(rd) | SA(sa) | ff) {} + InstReg(OpcodeField op, RSField rs, Register rt, Register rd, uint32_t sa, + FunctionField ff) + : Instruction(op | rs | RT(rt) | RD(rd) | SA(sa) | ff) {} + InstReg(OpcodeField op, Register rs, RTField rt, Register rd, uint32_t sa, + FunctionField ff) + : Instruction(op | RS(rs) | rt | RD(rd) | SA(sa) | ff) {} + InstReg(OpcodeField op, Register rs, uint32_t cc, Register rd, uint32_t sa, + FunctionField ff) + : Instruction(op | RS(rs) | cc | RD(rd) | SA(sa) | ff) {} + InstReg(OpcodeField op, uint32_t code, FunctionField ff) + : Instruction(op | code | ff) {} + // for float point + InstReg(OpcodeField op, RSField rs, Register rt, uint32_t fs) + : Instruction(op | rs | RT(rt) | FS(fs)) {} + InstReg(OpcodeField op, RSField rs, Register rt, FloatRegister rd) + : Instruction(op | rs | RT(rt) | RD(rd)) {} + InstReg(OpcodeField op, RSField rs, Register rt, FloatRegister rd, + uint32_t sa, FunctionField ff) + : Instruction(op | rs | RT(rt) | RD(rd) | SA(sa) | ff) {} + InstReg(OpcodeField op, RSField rs, Register rt, FloatRegister fs, + FloatRegister fd, FunctionField ff) + : Instruction(op | rs | RT(rt) | RD(fs) | SA(fd) | ff) {} + InstReg(OpcodeField op, RSField rs, FloatRegister ft, FloatRegister fs, + FloatRegister fd, FunctionField ff) + : Instruction(op | rs | RT(ft) | RD(fs) | SA(fd) | ff) {} + InstReg(OpcodeField op, RSField rs, FloatRegister ft, FloatRegister fd, + uint32_t sa, FunctionField ff) + : Instruction(op | rs | RT(ft) | RD(fd) | SA(sa) | ff) {} + + uint32_t extractRS() { + return extractBitField(RSShift + RSBits - 1, RSShift); + } + uint32_t extractRT() { + return extractBitField(RTShift + RTBits - 1, RTShift); + } + uint32_t extractRD() { + return extractBitField(RDShift + RDBits - 1, RDShift); + } + uint32_t extractSA() { + return extractBitField(SAShift + SABits - 1, SAShift); + } + uint32_t extractFunctionField() { + return extractBitField(FunctionShift + FunctionBits - 1, FunctionShift); + } +}; + +// Class for branch, load and store instructions with immediate offset. +class InstImm : public Instruction { + public: + void extractImm16(BOffImm16* dest); + + InstImm(OpcodeField op, Register rs, Register rt, BOffImm16 off) + : Instruction(op | RS(rs) | RT(rt) | off.encode()) {} + InstImm(OpcodeField op, Register rs, RTField rt, BOffImm16 off) + : Instruction(op | RS(rs) | rt | off.encode()) {} + InstImm(OpcodeField op, RSField rs, uint32_t cc, BOffImm16 off) + : Instruction(op | rs | cc | off.encode()) {} + InstImm(OpcodeField op, Register rs, Register rt, Imm16 off) + : Instruction(op | RS(rs) | RT(rt) | off.encode()) {} + InstImm(uint32_t raw) : Instruction(raw) {} + // For floating-point loads and stores. + InstImm(OpcodeField op, Register rs, FloatRegister rt, Imm16 off) + : Instruction(op | RS(rs) | RT(rt) | off.encode()) {} + + uint32_t extractOpcode() { + return extractBitField(OpcodeShift + OpcodeBits - 1, OpcodeShift); + } + void setOpcode(OpcodeField op) { data = (data & ~OpcodeMask) | op; } + uint32_t extractRS() { + return extractBitField(RSShift + RSBits - 1, RSShift); + } + uint32_t extractRT() { + return extractBitField(RTShift + RTBits - 1, RTShift); + } + void setRT(RTField rt) { data = (data & ~RTMask) | rt; } + uint32_t extractImm16Value() { + return extractBitField(Imm16Shift + Imm16Bits - 1, Imm16Shift); + } + void setBOffImm16(BOffImm16 off) { + // Reset immediate field and replace it + data = (data & ~Imm16Mask) | off.encode(); + } + void setImm16(Imm16 off) { + // Reset immediate field and replace it + data = (data & ~Imm16Mask) | off.encode(); + } +}; + +// Class for Jump type instructions. +class InstJump : public Instruction { + public: + InstJump(OpcodeField op, JOffImm26 off) : Instruction(op | off.encode()) {} + + uint32_t extractImm26Value() { + return extractBitField(Imm26Shift + Imm26Bits - 1, Imm26Shift); + } +}; + +// Class for Loongson-specific instructions +class InstGS : public Instruction { + public: + // For indexed loads and stores. + InstGS(OpcodeField op, Register rs, Register rt, Register rd, Imm8 off, + FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | RD(rd) | off.encode(3) | ff) {} + InstGS(OpcodeField op, Register rs, FloatRegister rt, Register rd, Imm8 off, + FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | RD(rd) | off.encode(3) | ff) {} + // For quad-word loads and stores. + InstGS(OpcodeField op, Register rs, Register rt, Register rz, GSImm13 off, + FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | RZ(rz) | off.encode(6) | ff) {} + InstGS(OpcodeField op, Register rs, FloatRegister rt, FloatRegister rz, + GSImm13 off, FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | RZ(rz) | off.encode(6) | ff) {} + InstGS(uint32_t raw) : Instruction(raw) {} + // For floating-point unaligned loads and stores. + InstGS(OpcodeField op, Register rs, FloatRegister rt, Imm8 off, + FunctionField ff) + : Instruction(op | RS(rs) | RT(rt) | off.encode(6) | ff) {} +}; + +inline bool IsUnaligned(const wasm::MemoryAccessDesc& access) { + if (!access.align()) { + return false; + } + +#ifdef JS_CODEGEN_MIPS32 + if (access.type() == Scalar::Int64 && access.align() >= 4) { + return false; + } +#endif + + return access.align() < access.byteSize(); +} + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_Assembler_mips_shared_h */ diff --git a/js/src/jit/mips-shared/AtomicOperations-mips-shared.h b/js/src/jit/mips-shared/AtomicOperations-mips-shared.h new file mode 100644 index 0000000000..5ef11fd8c2 --- /dev/null +++ b/js/src/jit/mips-shared/AtomicOperations-mips-shared.h @@ -0,0 +1,521 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* For documentation, see jit/AtomicOperations.h */ + +// NOTE, MIPS32 unlike MIPS64 doesn't provide hardware support for lock-free +// 64-bit atomics. We lie down below about 8-byte atomics being always lock- +// free in order to support wasm jit. The 64-bit atomic for MIPS32 do not use +// __atomic intrinsic and therefore do not relay on -latomic. +// Access to a aspecific 64-bit variable in memory is protected by an +// AddressLock whose instance is shared between jit and AtomicOperations. + +#ifndef jit_mips_shared_AtomicOperations_mips_shared_h +#define jit_mips_shared_AtomicOperations_mips_shared_h + +#include "mozilla/Assertions.h" +#include "mozilla/Types.h" + +#include "builtin/AtomicsObject.h" +#include "vm/Uint8Clamped.h" + +#if !defined(__clang__) && !defined(__GNUC__) +# error "This file only for gcc-compatible compilers" +#endif + +#if defined(JS_SIMULATOR_MIPS32) && !defined(__i386__) +# error "The MIPS32 simulator atomics assume x86" +#endif + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +struct AddressLock { + public: + void acquire(); + void release(); + + private: + uint32_t spinlock; +}; + +static_assert(sizeof(AddressLock) == sizeof(uint32_t), + "AddressLock must be 4 bytes for it to be consumed by jit"); + +// For now use a single global AddressLock. +static AddressLock gAtomic64Lock; + +struct MOZ_RAII AddressGuard { + explicit AddressGuard(void* addr) { gAtomic64Lock.acquire(); } + + ~AddressGuard() { gAtomic64Lock.release(); } +}; + +#endif + +} // namespace jit +} // namespace js + +inline bool js::jit::AtomicOperations::hasAtomic8() { return true; } + +inline bool js::jit::AtomicOperations::isLockfree8() { + MOZ_ASSERT(__atomic_always_lock_free(sizeof(int8_t), 0)); + MOZ_ASSERT(__atomic_always_lock_free(sizeof(int16_t), 0)); + MOZ_ASSERT(__atomic_always_lock_free(sizeof(int32_t), 0)); +#if defined(JS_64BIT) + MOZ_ASSERT(__atomic_always_lock_free(sizeof(int64_t), 0)); +#endif + return true; +} + +inline void js::jit::AtomicOperations::fenceSeqCst() { + __atomic_thread_fence(__ATOMIC_SEQ_CST); +} + +template <typename T> +inline T js::jit::AtomicOperations::loadSeqCst(T* addr) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + T v; + __atomic_load(addr, &v, __ATOMIC_SEQ_CST); + return v; +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::loadSeqCst(int64_t* addr) { + AddressGuard guard(addr); + return *addr; +} + +template <> +inline uint64_t js::jit::AtomicOperations::loadSeqCst(uint64_t* addr) { + AddressGuard guard(addr); + return *addr; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline void js::jit::AtomicOperations::storeSeqCst(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + __atomic_store(addr, &val, __ATOMIC_SEQ_CST); +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline void js::jit::AtomicOperations::storeSeqCst(int64_t* addr, int64_t val) { + AddressGuard guard(addr); + *addr = val; +} + +template <> +inline void js::jit::AtomicOperations::storeSeqCst(uint64_t* addr, + uint64_t val) { + AddressGuard guard(addr); + *addr = val; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline T js::jit::AtomicOperations::compareExchangeSeqCst(T* addr, T oldval, + T newval) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + __atomic_compare_exchange(addr, &oldval, &newval, false, __ATOMIC_SEQ_CST, + __ATOMIC_SEQ_CST); + return oldval; +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::compareExchangeSeqCst( + int64_t* addr, int64_t oldval, int64_t newval) { + AddressGuard guard(addr); + int64_t val = *addr; + if (val == oldval) { + *addr = newval; + } + return val; +} + +template <> +inline uint64_t js::jit::AtomicOperations::compareExchangeSeqCst( + uint64_t* addr, uint64_t oldval, uint64_t newval) { + AddressGuard guard(addr); + uint64_t val = *addr; + if (val == oldval) { + *addr = newval; + } + return val; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline T js::jit::AtomicOperations::fetchAddSeqCst(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + return __atomic_fetch_add(addr, val, __ATOMIC_SEQ_CST); +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::fetchAddSeqCst(int64_t* addr, + int64_t val) { + AddressGuard guard(addr); + int64_t old = *addr; + *addr = old + val; + return old; +} + +template <> +inline uint64_t js::jit::AtomicOperations::fetchAddSeqCst(uint64_t* addr, + uint64_t val) { + AddressGuard guard(addr); + uint64_t old = *addr; + *addr = old + val; + return old; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline T js::jit::AtomicOperations::fetchSubSeqCst(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + return __atomic_fetch_sub(addr, val, __ATOMIC_SEQ_CST); +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::fetchSubSeqCst(int64_t* addr, + int64_t val) { + AddressGuard guard(addr); + int64_t old = *addr; + *addr = old - val; + return old; +} + +template <> +inline uint64_t js::jit::AtomicOperations::fetchSubSeqCst(uint64_t* addr, + uint64_t val) { + AddressGuard guard(addr); + uint64_t old = *addr; + *addr = old - val; + return old; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline T js::jit::AtomicOperations::fetchAndSeqCst(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + return __atomic_fetch_and(addr, val, __ATOMIC_SEQ_CST); +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::fetchAndSeqCst(int64_t* addr, + int64_t val) { + AddressGuard guard(addr); + int64_t old = *addr; + *addr = old & val; + return old; +} + +template <> +inline uint64_t js::jit::AtomicOperations::fetchAndSeqCst(uint64_t* addr, + uint64_t val) { + AddressGuard guard(addr); + uint64_t old = *addr; + *addr = old & val; + return old; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline T js::jit::AtomicOperations::fetchOrSeqCst(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + return __atomic_fetch_or(addr, val, __ATOMIC_SEQ_CST); +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::fetchOrSeqCst(int64_t* addr, + int64_t val) { + AddressGuard guard(addr); + int64_t old = *addr; + *addr = old | val; + return old; +} + +template <> +inline uint64_t js::jit::AtomicOperations::fetchOrSeqCst(uint64_t* addr, + uint64_t val) { + AddressGuard guard(addr); + uint64_t old = *addr; + *addr = old | val; + return old; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline T js::jit::AtomicOperations::fetchXorSeqCst(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + return __atomic_fetch_xor(addr, val, __ATOMIC_SEQ_CST); +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::fetchXorSeqCst(int64_t* addr, + int64_t val) { + AddressGuard guard(addr); + int64_t old = *addr; + *addr = old ^ val; + return old; +} + +template <> +inline uint64_t js::jit::AtomicOperations::fetchXorSeqCst(uint64_t* addr, + uint64_t val) { + AddressGuard guard(addr); + uint64_t old = *addr; + *addr = old ^ val; + return old; +} + +#endif + +} // namespace jit +} // namespace js + +template <typename T> +inline T js::jit::AtomicOperations::loadSafeWhenRacy(T* addr) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + T v; + __atomic_load(addr, &v, __ATOMIC_RELAXED); + return v; +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::loadSafeWhenRacy(int64_t* addr) { + return *addr; +} + +template <> +inline uint64_t js::jit::AtomicOperations::loadSafeWhenRacy(uint64_t* addr) { + return *addr; +} + +#endif + +template <> +inline uint8_clamped js::jit::AtomicOperations::loadSafeWhenRacy( + uint8_clamped* addr) { + uint8_t v; + __atomic_load(&addr->val, &v, __ATOMIC_RELAXED); + return uint8_clamped(v); +} + +template <> +inline float js::jit::AtomicOperations::loadSafeWhenRacy(float* addr) { + return *addr; +} + +template <> +inline double js::jit::AtomicOperations::loadSafeWhenRacy(double* addr) { + return *addr; +} + +} // namespace jit +} // namespace js + +template <typename T> +inline void js::jit::AtomicOperations::storeSafeWhenRacy(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + __atomic_store(addr, &val, __ATOMIC_RELAXED); +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline void js::jit::AtomicOperations::storeSafeWhenRacy(int64_t* addr, + int64_t val) { + *addr = val; +} + +template <> +inline void js::jit::AtomicOperations::storeSafeWhenRacy(uint64_t* addr, + uint64_t val) { + *addr = val; +} + +#endif + +template <> +inline void js::jit::AtomicOperations::storeSafeWhenRacy(uint8_clamped* addr, + uint8_clamped val) { + __atomic_store(&addr->val, &val.val, __ATOMIC_RELAXED); +} + +template <> +inline void js::jit::AtomicOperations::storeSafeWhenRacy(float* addr, + float val) { + *addr = val; +} + +template <> +inline void js::jit::AtomicOperations::storeSafeWhenRacy(double* addr, + double val) { + *addr = val; +} + +} // namespace jit +} // namespace js + +inline void js::jit::AtomicOperations::memcpySafeWhenRacy(void* dest, + const void* src, + size_t nbytes) { + MOZ_ASSERT(!((char*)dest <= (char*)src && (char*)src < (char*)dest + nbytes)); + MOZ_ASSERT(!((char*)src <= (char*)dest && (char*)dest < (char*)src + nbytes)); + ::memcpy(dest, src, nbytes); +} + +inline void js::jit::AtomicOperations::memmoveSafeWhenRacy(void* dest, + const void* src, + size_t nbytes) { + ::memmove(dest, src, nbytes); +} + +template <typename T> +inline T js::jit::AtomicOperations::exchangeSeqCst(T* addr, T val) { + static_assert(sizeof(T) <= sizeof(void*), + "atomics supported up to pointer size only"); + T v; + __atomic_exchange(addr, &val, &v, __ATOMIC_SEQ_CST); + return v; +} + +namespace js { +namespace jit { + +#if !defined(JS_64BIT) + +template <> +inline int64_t js::jit::AtomicOperations::exchangeSeqCst(int64_t* addr, + int64_t val) { + AddressGuard guard(addr); + int64_t old = *addr; + *addr = val; + return old; +} + +template <> +inline uint64_t js::jit::AtomicOperations::exchangeSeqCst(uint64_t* addr, + uint64_t val) { + AddressGuard guard(addr); + uint64_t old = *addr; + *addr = val; + return old; +} + +#endif + +} // namespace jit +} // namespace js + +#if !defined(JS_64BIT) + +inline void js::jit::AddressLock::acquire() { + uint32_t zero = 0; + uint32_t one = 1; + while (!__atomic_compare_exchange(&spinlock, &zero, &one, true, + __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)) { + zero = 0; + } +} + +inline void js::jit::AddressLock::release() { + uint32_t zero = 0; + __atomic_store(&spinlock, &zero, __ATOMIC_SEQ_CST); +} + +#endif + +#endif // jit_mips_shared_AtomicOperations_mips_shared_h diff --git a/js/src/jit/mips-shared/BaselineIC-mips-shared.cpp b/js/src/jit/mips-shared/BaselineIC-mips-shared.cpp new file mode 100644 index 0000000000..6e21edc0ba --- /dev/null +++ b/js/src/jit/mips-shared/BaselineIC-mips-shared.cpp @@ -0,0 +1,37 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/BaselineIC.h" +#include "jit/SharedICHelpers.h" + +using namespace js; +using namespace js::jit; + +namespace js { +namespace jit { + +bool ICCompare_Double::Compiler::generateStubCode(MacroAssembler& masm) { + Label failure, isNaN; + masm.ensureDouble(R0, FloatReg0, &failure); + masm.ensureDouble(R1, FloatReg1, &failure); + + Register dest = R0.scratchReg(); + + Assembler::DoubleCondition doubleCond = JSOpToDoubleCondition(op); + + masm.ma_cmp_set_double(dest, FloatReg0, FloatReg1, doubleCond); + + masm.tagValue(JSVAL_TYPE_BOOLEAN, dest, R0); + EmitReturnFromIC(masm); + + // Failure case - jump to next stub + masm.bind(&failure); + EmitStubGuardFailure(masm); + return true; +} + +} // namespace jit +} // namespace js diff --git a/js/src/jit/mips-shared/CodeGenerator-mips-shared.cpp b/js/src/jit/mips-shared/CodeGenerator-mips-shared.cpp new file mode 100644 index 0000000000..68f1e5fe34 --- /dev/null +++ b/js/src/jit/mips-shared/CodeGenerator-mips-shared.cpp @@ -0,0 +1,2440 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/mips-shared/CodeGenerator-mips-shared.h" + +#include "mozilla/DebugOnly.h" +#include "mozilla/MathAlgorithms.h" + +#include "jsnum.h" + +#include "jit/CodeGenerator.h" +#include "jit/InlineScriptTree.h" +#include "jit/JitRuntime.h" +#include "jit/MIR.h" +#include "jit/MIRGraph.h" +#include "js/Conversions.h" +#include "vm/JSContext.h" +#include "vm/Realm.h" +#include "vm/Shape.h" + +#include "jit/MacroAssembler-inl.h" +#include "jit/shared/CodeGenerator-shared-inl.h" +#include "vm/JSScript-inl.h" + +using namespace js; +using namespace js::jit; + +using JS::GenericNaN; +using JS::ToInt32; +using mozilla::DebugOnly; +using mozilla::FloorLog2; +using mozilla::NegativeInfinity; + +// shared +CodeGeneratorMIPSShared::CodeGeneratorMIPSShared(MIRGenerator* gen, + LIRGraph* graph, + MacroAssembler* masm) + : CodeGeneratorShared(gen, graph, masm) {} + +Operand CodeGeneratorMIPSShared::ToOperand(const LAllocation& a) { + if (a.isGeneralReg()) { + return Operand(a.toGeneralReg()->reg()); + } + if (a.isFloatReg()) { + return Operand(a.toFloatReg()->reg()); + } + return Operand(ToAddress(a)); +} + +Operand CodeGeneratorMIPSShared::ToOperand(const LAllocation* a) { + return ToOperand(*a); +} + +Operand CodeGeneratorMIPSShared::ToOperand(const LDefinition* def) { + return ToOperand(def->output()); +} + +#ifdef JS_PUNBOX64 +Operand CodeGeneratorMIPSShared::ToOperandOrRegister64( + const LInt64Allocation input) { + return ToOperand(input.value()); +} +#else +Register64 CodeGeneratorMIPSShared::ToOperandOrRegister64( + const LInt64Allocation input) { + return ToRegister64(input); +} +#endif + +void CodeGeneratorMIPSShared::branchToBlock(Assembler::FloatFormat fmt, + FloatRegister lhs, + FloatRegister rhs, MBasicBlock* mir, + Assembler::DoubleCondition cond) { + // Skip past trivial blocks. + Label* label = skipTrivialBlocks(mir)->lir()->label(); + if (fmt == Assembler::DoubleFloat) { + masm.branchDouble(cond, lhs, rhs, label); + } else { + masm.branchFloat(cond, lhs, rhs, label); + } +} + +void OutOfLineBailout::accept(CodeGeneratorMIPSShared* codegen) { + codegen->visitOutOfLineBailout(this); +} + +void CodeGenerator::visitTestIAndBranch(LTestIAndBranch* test) { + const LAllocation* opd = test->getOperand(0); + MBasicBlock* ifTrue = test->ifTrue(); + MBasicBlock* ifFalse = test->ifFalse(); + + emitBranch(ToRegister(opd), Imm32(0), Assembler::NonZero, ifTrue, ifFalse); +} + +void CodeGenerator::visitCompare(LCompare* comp) { + MCompare* mir = comp->mir(); + Assembler::Condition cond = JSOpToCondition(mir->compareType(), comp->jsop()); + const LAllocation* left = comp->getOperand(0); + const LAllocation* right = comp->getOperand(1); + const LDefinition* def = comp->getDef(0); + +#ifdef JS_CODEGEN_MIPS64 + if (mir->compareType() == MCompare::Compare_Object || + mir->compareType() == MCompare::Compare_Symbol || + mir->compareType() == MCompare::Compare_UIntPtr || + mir->compareType() == MCompare::Compare_RefOrNull) { + if (right->isConstant()) { + MOZ_ASSERT(mir->compareType() == MCompare::Compare_UIntPtr); + masm.cmpPtrSet(cond, ToRegister(left), Imm32(ToInt32(right)), + ToRegister(def)); + } else if (right->isGeneralReg()) { + masm.cmpPtrSet(cond, ToRegister(left), ToRegister(right), + ToRegister(def)); + } else { + masm.cmpPtrSet(cond, ToRegister(left), ToAddress(right), ToRegister(def)); + } + return; + } +#endif + + if (right->isConstant()) { + masm.cmp32Set(cond, ToRegister(left), Imm32(ToInt32(right)), + ToRegister(def)); + } else if (right->isGeneralReg()) { + masm.cmp32Set(cond, ToRegister(left), ToRegister(right), ToRegister(def)); + } else { + masm.cmp32Set(cond, ToRegister(left), ToAddress(right), ToRegister(def)); + } +} + +void CodeGenerator::visitCompareAndBranch(LCompareAndBranch* comp) { + MCompare* mir = comp->cmpMir(); + Assembler::Condition cond = JSOpToCondition(mir->compareType(), comp->jsop()); + +#ifdef JS_CODEGEN_MIPS64 + if (mir->compareType() == MCompare::Compare_Object || + mir->compareType() == MCompare::Compare_Symbol || + mir->compareType() == MCompare::Compare_UIntPtr || + mir->compareType() == MCompare::Compare_RefOrNull) { + if (comp->right()->isConstant()) { + MOZ_ASSERT(mir->compareType() == MCompare::Compare_UIntPtr); + emitBranch(ToRegister(comp->left()), Imm32(ToInt32(comp->right())), cond, + comp->ifTrue(), comp->ifFalse()); + } else if (comp->right()->isGeneralReg()) { + emitBranch(ToRegister(comp->left()), ToRegister(comp->right()), cond, + comp->ifTrue(), comp->ifFalse()); + } else { + masm.loadPtr(ToAddress(comp->right()), ScratchRegister); + emitBranch(ToRegister(comp->left()), ScratchRegister, cond, + comp->ifTrue(), comp->ifFalse()); + } + return; + } +#endif + + if (comp->right()->isConstant()) { + emitBranch(ToRegister(comp->left()), Imm32(ToInt32(comp->right())), cond, + comp->ifTrue(), comp->ifFalse()); + } else if (comp->right()->isGeneralReg()) { + emitBranch(ToRegister(comp->left()), ToRegister(comp->right()), cond, + comp->ifTrue(), comp->ifFalse()); + } else { + masm.load32(ToAddress(comp->right()), ScratchRegister); + emitBranch(ToRegister(comp->left()), ScratchRegister, cond, comp->ifTrue(), + comp->ifFalse()); + } +} + +bool CodeGeneratorMIPSShared::generateOutOfLineCode() { + if (!CodeGeneratorShared::generateOutOfLineCode()) { + return false; + } + + if (deoptLabel_.used()) { + // All non-table-based bailouts will go here. + masm.bind(&deoptLabel_); + + // Push the frame size, so the handler can recover the IonScript. + // Frame size is stored in 'ra' and pushed by GenerateBailoutThunk + // We have to use 'ra' because generateBailoutTable will implicitly do + // the same. + masm.move32(Imm32(frameSize()), ra); + + TrampolinePtr handler = gen->jitRuntime()->getGenericBailoutHandler(); + masm.jump(handler); + } + + return !masm.oom(); +} + +void CodeGeneratorMIPSShared::bailoutFrom(Label* label, LSnapshot* snapshot) { + MOZ_ASSERT_IF(!masm.oom(), label->used()); + MOZ_ASSERT_IF(!masm.oom(), !label->bound()); + + encode(snapshot); + + InlineScriptTree* tree = snapshot->mir()->block()->trackedTree(); + OutOfLineBailout* ool = + new (alloc()) OutOfLineBailout(snapshot, masm.framePushed()); + addOutOfLineCode(ool, + new (alloc()) BytecodeSite(tree, tree->script()->code())); + + masm.retarget(label, ool->entry()); +} + +void CodeGeneratorMIPSShared::bailout(LSnapshot* snapshot) { + Label label; + masm.jump(&label); + bailoutFrom(&label, snapshot); +} + +void CodeGenerator::visitMinMaxD(LMinMaxD* ins) { + FloatRegister first = ToFloatRegister(ins->first()); + FloatRegister second = ToFloatRegister(ins->second()); + + MOZ_ASSERT(first == ToFloatRegister(ins->output())); + + if (ins->mir()->isMax()) { + masm.maxDouble(second, first, true); + } else { + masm.minDouble(second, first, true); + } +} + +void CodeGenerator::visitMinMaxF(LMinMaxF* ins) { + FloatRegister first = ToFloatRegister(ins->first()); + FloatRegister second = ToFloatRegister(ins->second()); + + MOZ_ASSERT(first == ToFloatRegister(ins->output())); + + if (ins->mir()->isMax()) { + masm.maxFloat32(second, first, true); + } else { + masm.minFloat32(second, first, true); + } +} + +void CodeGenerator::visitAddI(LAddI* ins) { + const LAllocation* lhs = ins->getOperand(0); + const LAllocation* rhs = ins->getOperand(1); + const LDefinition* dest = ins->getDef(0); + + MOZ_ASSERT(rhs->isConstant() || rhs->isGeneralReg()); + + // If there is no snapshot, we don't need to check for overflow + if (!ins->snapshot()) { + if (rhs->isConstant()) { + masm.ma_addu(ToRegister(dest), ToRegister(lhs), Imm32(ToInt32(rhs))); + } else { + masm.as_addu(ToRegister(dest), ToRegister(lhs), ToRegister(rhs)); + } + return; + } + + Label overflow; + if (rhs->isConstant()) { + masm.ma_add32TestOverflow(ToRegister(dest), ToRegister(lhs), + Imm32(ToInt32(rhs)), &overflow); + } else { + masm.ma_add32TestOverflow(ToRegister(dest), ToRegister(lhs), + ToRegister(rhs), &overflow); + } + + bailoutFrom(&overflow, ins->snapshot()); +} + +void CodeGenerator::visitAddI64(LAddI64* lir) { + const LInt64Allocation lhs = lir->getInt64Operand(LAddI64::Lhs); + const LInt64Allocation rhs = lir->getInt64Operand(LAddI64::Rhs); + + MOZ_ASSERT(ToOutRegister64(lir) == ToRegister64(lhs)); + + if (IsConstant(rhs)) { + masm.add64(Imm64(ToInt64(rhs)), ToRegister64(lhs)); + return; + } + + masm.add64(ToOperandOrRegister64(rhs), ToRegister64(lhs)); +} + +void CodeGenerator::visitSubI(LSubI* ins) { + const LAllocation* lhs = ins->getOperand(0); + const LAllocation* rhs = ins->getOperand(1); + const LDefinition* dest = ins->getDef(0); + + MOZ_ASSERT(rhs->isConstant() || rhs->isGeneralReg()); + + // If there is no snapshot, we don't need to check for overflow + if (!ins->snapshot()) { + if (rhs->isConstant()) { + masm.ma_subu(ToRegister(dest), ToRegister(lhs), Imm32(ToInt32(rhs))); + } else { + masm.as_subu(ToRegister(dest), ToRegister(lhs), ToRegister(rhs)); + } + return; + } + + Label overflow; + if (rhs->isConstant()) { + masm.ma_sub32TestOverflow(ToRegister(dest), ToRegister(lhs), + Imm32(ToInt32(rhs)), &overflow); + } else { + masm.ma_sub32TestOverflow(ToRegister(dest), ToRegister(lhs), + ToRegister(rhs), &overflow); + } + + bailoutFrom(&overflow, ins->snapshot()); +} + +void CodeGenerator::visitSubI64(LSubI64* lir) { + const LInt64Allocation lhs = lir->getInt64Operand(LSubI64::Lhs); + const LInt64Allocation rhs = lir->getInt64Operand(LSubI64::Rhs); + + MOZ_ASSERT(ToOutRegister64(lir) == ToRegister64(lhs)); + + if (IsConstant(rhs)) { + masm.sub64(Imm64(ToInt64(rhs)), ToRegister64(lhs)); + return; + } + + masm.sub64(ToOperandOrRegister64(rhs), ToRegister64(lhs)); +} + +void CodeGenerator::visitMulI(LMulI* ins) { + const LAllocation* lhs = ins->lhs(); + const LAllocation* rhs = ins->rhs(); + Register dest = ToRegister(ins->output()); + MMul* mul = ins->mir(); + + MOZ_ASSERT_IF(mul->mode() == MMul::Integer, + !mul->canBeNegativeZero() && !mul->canOverflow()); + + if (rhs->isConstant()) { + int32_t constant = ToInt32(rhs); + Register src = ToRegister(lhs); + + // Bailout on -0.0 + if (mul->canBeNegativeZero() && constant <= 0) { + Assembler::Condition cond = + (constant == 0) ? Assembler::LessThan : Assembler::Equal; + bailoutCmp32(cond, src, Imm32(0), ins->snapshot()); + } + + switch (constant) { + case -1: + if (mul->canOverflow()) { + bailoutCmp32(Assembler::Equal, src, Imm32(INT32_MIN), + ins->snapshot()); + } + + masm.ma_negu(dest, src); + break; + case 0: + masm.move32(Imm32(0), dest); + break; + case 1: + masm.move32(src, dest); + break; + case 2: + if (mul->canOverflow()) { + Label mulTwoOverflow; + masm.ma_add32TestOverflow(dest, src, src, &mulTwoOverflow); + + bailoutFrom(&mulTwoOverflow, ins->snapshot()); + } else { + masm.as_addu(dest, src, src); + } + break; + default: + uint32_t shift = FloorLog2(constant); + + if (!mul->canOverflow() && (constant > 0)) { + // If it cannot overflow, we can do lots of optimizations. + uint32_t rest = constant - (1 << shift); + + // See if the constant has one bit set, meaning it can be + // encoded as a bitshift. + if ((1 << shift) == constant) { + masm.ma_sll(dest, src, Imm32(shift)); + return; + } + + // If the constant cannot be encoded as (1<<C1), see if it can + // be encoded as (1<<C1) | (1<<C2), which can be computed + // using an add and a shift. + uint32_t shift_rest = FloorLog2(rest); + if (src != dest && (1u << shift_rest) == rest) { + masm.ma_sll(dest, src, Imm32(shift - shift_rest)); + masm.add32(src, dest); + if (shift_rest != 0) { + masm.ma_sll(dest, dest, Imm32(shift_rest)); + } + return; + } + } + + if (mul->canOverflow() && (constant > 0) && (src != dest)) { + // To stay on the safe side, only optimize things that are a + // power of 2. + + if ((1 << shift) == constant) { + // dest = lhs * pow(2, shift) + masm.ma_sll(dest, src, Imm32(shift)); + // At runtime, check (lhs == dest >> shift), if this does + // not hold, some bits were lost due to overflow, and the + // computation should be resumed as a double. + masm.ma_sra(ScratchRegister, dest, Imm32(shift)); + bailoutCmp32(Assembler::NotEqual, src, ScratchRegister, + ins->snapshot()); + return; + } + } + + if (mul->canOverflow()) { + Label mulConstOverflow; + masm.ma_mul32TestOverflow(dest, ToRegister(lhs), Imm32(ToInt32(rhs)), + &mulConstOverflow); + + bailoutFrom(&mulConstOverflow, ins->snapshot()); + } else { + masm.ma_mul(dest, src, Imm32(ToInt32(rhs))); + } + break; + } + } else { + Label multRegOverflow; + + if (mul->canOverflow()) { + masm.ma_mul32TestOverflow(dest, ToRegister(lhs), ToRegister(rhs), + &multRegOverflow); + bailoutFrom(&multRegOverflow, ins->snapshot()); + } else { + masm.as_mul(dest, ToRegister(lhs), ToRegister(rhs)); + } + + if (mul->canBeNegativeZero()) { + Label done; + masm.ma_b(dest, dest, &done, Assembler::NonZero, ShortJump); + + // Result is -0 if lhs or rhs is negative. + // In that case result must be double value so bailout + Register scratch = SecondScratchReg; + masm.as_or(scratch, ToRegister(lhs), ToRegister(rhs)); + bailoutCmp32(Assembler::Signed, scratch, scratch, ins->snapshot()); + + masm.bind(&done); + } + } +} + +void CodeGenerator::visitMulI64(LMulI64* lir) { + const LInt64Allocation lhs = lir->getInt64Operand(LMulI64::Lhs); + const LInt64Allocation rhs = lir->getInt64Operand(LMulI64::Rhs); + const Register64 output = ToOutRegister64(lir); + + if (IsConstant(rhs)) { + int64_t constant = ToInt64(rhs); + switch (constant) { + case -1: + masm.neg64(ToRegister64(lhs)); + return; + case 0: + masm.xor64(ToRegister64(lhs), ToRegister64(lhs)); + return; + case 1: + // nop + return; + default: + if (constant > 0) { + if (mozilla::IsPowerOfTwo(static_cast<uint32_t>(constant + 1))) { + masm.move64(ToRegister64(lhs), output); + masm.lshift64(Imm32(FloorLog2(constant + 1)), output); + masm.sub64(ToRegister64(lhs), output); + return; + } else if (mozilla::IsPowerOfTwo( + static_cast<uint32_t>(constant - 1))) { + masm.move64(ToRegister64(lhs), output); + masm.lshift64(Imm32(FloorLog2(constant - 1u)), output); + masm.add64(ToRegister64(lhs), output); + return; + } + // Use shift if constant is power of 2. + int32_t shift = mozilla::FloorLog2(constant); + if (int64_t(1) << shift == constant) { + masm.lshift64(Imm32(shift), ToRegister64(lhs)); + return; + } + } + Register temp = ToTempRegisterOrInvalid(lir->temp()); + masm.mul64(Imm64(constant), ToRegister64(lhs), temp); + } + } else { + Register temp = ToTempRegisterOrInvalid(lir->temp()); + masm.mul64(ToOperandOrRegister64(rhs), ToRegister64(lhs), temp); + } +} + +void CodeGenerator::visitDivI(LDivI* ins) { + // Extract the registers from this instruction + Register lhs = ToRegister(ins->lhs()); + Register rhs = ToRegister(ins->rhs()); + Register dest = ToRegister(ins->output()); + Register temp = ToRegister(ins->getTemp(0)); + MDiv* mir = ins->mir(); + + Label done; + + // Handle divide by zero. + if (mir->canBeDivideByZero()) { + if (mir->trapOnError()) { + Label nonZero; + masm.ma_b(rhs, rhs, &nonZero, Assembler::NonZero); + masm.wasmTrap(wasm::Trap::IntegerDivideByZero, mir->bytecodeOffset()); + masm.bind(&nonZero); + } else if (mir->canTruncateInfinities()) { + // Truncated division by zero is zero (Infinity|0 == 0) + Label notzero; + masm.ma_b(rhs, rhs, ¬zero, Assembler::NonZero, ShortJump); + masm.move32(Imm32(0), dest); + masm.ma_b(&done, ShortJump); + masm.bind(¬zero); + } else { + MOZ_ASSERT(mir->fallible()); + bailoutCmp32(Assembler::Zero, rhs, rhs, ins->snapshot()); + } + } + + // Handle an integer overflow exception from -2147483648 / -1. + if (mir->canBeNegativeOverflow()) { + Label notMinInt; + masm.move32(Imm32(INT32_MIN), temp); + masm.ma_b(lhs, temp, ¬MinInt, Assembler::NotEqual, ShortJump); + + masm.move32(Imm32(-1), temp); + if (mir->trapOnError()) { + Label ok; + masm.ma_b(rhs, temp, &ok, Assembler::NotEqual); + masm.wasmTrap(wasm::Trap::IntegerOverflow, mir->bytecodeOffset()); + masm.bind(&ok); + } else if (mir->canTruncateOverflow()) { + // (-INT32_MIN)|0 == INT32_MIN + Label skip; + masm.ma_b(rhs, temp, &skip, Assembler::NotEqual, ShortJump); + masm.move32(Imm32(INT32_MIN), dest); + masm.ma_b(&done, ShortJump); + masm.bind(&skip); + } else { + MOZ_ASSERT(mir->fallible()); + bailoutCmp32(Assembler::Equal, rhs, temp, ins->snapshot()); + } + masm.bind(¬MinInt); + } + + // Handle negative 0. (0/-Y) + if (!mir->canTruncateNegativeZero() && mir->canBeNegativeZero()) { + Label nonzero; + masm.ma_b(lhs, lhs, &nonzero, Assembler::NonZero, ShortJump); + bailoutCmp32(Assembler::LessThan, rhs, Imm32(0), ins->snapshot()); + masm.bind(&nonzero); + } + // Note: above safety checks could not be verified as Ion seems to be + // smarter and requires double arithmetic in such cases. + + // All regular. Lets call div. + if (mir->canTruncateRemainder()) { +#ifdef MIPSR6 + masm.as_div(dest, lhs, rhs); +#else + masm.as_div(lhs, rhs); + masm.as_mflo(dest); +#endif + } else { + MOZ_ASSERT(mir->fallible()); + + Label remainderNonZero; + masm.ma_div_branch_overflow(dest, lhs, rhs, &remainderNonZero); + bailoutFrom(&remainderNonZero, ins->snapshot()); + } + + masm.bind(&done); +} + +void CodeGenerator::visitDivPowTwoI(LDivPowTwoI* ins) { + Register lhs = ToRegister(ins->numerator()); + Register dest = ToRegister(ins->output()); + Register tmp = ToRegister(ins->getTemp(0)); + int32_t shift = ins->shift(); + + if (shift != 0) { + MDiv* mir = ins->mir(); + if (!mir->isTruncated()) { + // If the remainder is going to be != 0, bailout since this must + // be a double. + masm.ma_sll(tmp, lhs, Imm32(32 - shift)); + bailoutCmp32(Assembler::NonZero, tmp, tmp, ins->snapshot()); + } + + if (!mir->canBeNegativeDividend()) { + // Numerator is unsigned, so needs no adjusting. Do the shift. + masm.ma_sra(dest, lhs, Imm32(shift)); + return; + } + + // Adjust the value so that shifting produces a correctly rounded result + // when the numerator is negative. See 10-1 "Signed Division by a Known + // Power of 2" in Henry S. Warren, Jr.'s Hacker's Delight. + if (shift > 1) { + masm.ma_sra(tmp, lhs, Imm32(31)); + masm.ma_srl(tmp, tmp, Imm32(32 - shift)); + masm.add32(lhs, tmp); + } else { + masm.ma_srl(tmp, lhs, Imm32(32 - shift)); + masm.add32(lhs, tmp); + } + + // Do the shift. + masm.ma_sra(dest, tmp, Imm32(shift)); + } else { + masm.move32(lhs, dest); + } +} + +void CodeGenerator::visitModI(LModI* ins) { + // Extract the registers from this instruction + Register lhs = ToRegister(ins->lhs()); + Register rhs = ToRegister(ins->rhs()); + Register dest = ToRegister(ins->output()); + Register callTemp = ToRegister(ins->callTemp()); + MMod* mir = ins->mir(); + Label done, prevent; + + masm.move32(lhs, callTemp); + + // Prevent INT_MIN % -1; + // The integer division will give INT_MIN, but we want -(double)INT_MIN. + if (mir->canBeNegativeDividend()) { + masm.ma_b(lhs, Imm32(INT_MIN), &prevent, Assembler::NotEqual, ShortJump); + if (mir->isTruncated()) { + // (INT_MIN % -1)|0 == 0 + Label skip; + masm.ma_b(rhs, Imm32(-1), &skip, Assembler::NotEqual, ShortJump); + masm.move32(Imm32(0), dest); + masm.ma_b(&done, ShortJump); + masm.bind(&skip); + } else { + MOZ_ASSERT(mir->fallible()); + bailoutCmp32(Assembler::Equal, rhs, Imm32(-1), ins->snapshot()); + } + masm.bind(&prevent); + } + + // 0/X (with X < 0) is bad because both of these values *should* be + // doubles, and the result should be -0.0, which cannot be represented in + // integers. X/0 is bad because it will give garbage (or abort), when it + // should give either \infty, -\infty or NAN. + + // Prevent 0 / X (with X < 0) and X / 0 + // testing X / Y. Compare Y with 0. + // There are three cases: (Y < 0), (Y == 0) and (Y > 0) + // If (Y < 0), then we compare X with 0, and bail if X == 0 + // If (Y == 0), then we simply want to bail. + // if (Y > 0), we don't bail. + + if (mir->canBeDivideByZero()) { + if (mir->isTruncated()) { + if (mir->trapOnError()) { + Label nonZero; + masm.ma_b(rhs, rhs, &nonZero, Assembler::NonZero); + masm.wasmTrap(wasm::Trap::IntegerDivideByZero, mir->bytecodeOffset()); + masm.bind(&nonZero); + } else { + Label skip; + masm.ma_b(rhs, Imm32(0), &skip, Assembler::NotEqual, ShortJump); + masm.move32(Imm32(0), dest); + masm.ma_b(&done, ShortJump); + masm.bind(&skip); + } + } else { + MOZ_ASSERT(mir->fallible()); + bailoutCmp32(Assembler::Equal, rhs, Imm32(0), ins->snapshot()); + } + } + + if (mir->canBeNegativeDividend()) { + Label notNegative; + masm.ma_b(rhs, Imm32(0), ¬Negative, Assembler::GreaterThan, ShortJump); + if (mir->isTruncated()) { + // NaN|0 == 0 and (0 % -X)|0 == 0 + Label skip; + masm.ma_b(lhs, Imm32(0), &skip, Assembler::NotEqual, ShortJump); + masm.move32(Imm32(0), dest); + masm.ma_b(&done, ShortJump); + masm.bind(&skip); + } else { + MOZ_ASSERT(mir->fallible()); + bailoutCmp32(Assembler::Equal, lhs, Imm32(0), ins->snapshot()); + } + masm.bind(¬Negative); + } +#ifdef MIPSR6 + masm.as_mod(dest, lhs, rhs); +#else + masm.as_div(lhs, rhs); + masm.as_mfhi(dest); +#endif + + // If X%Y == 0 and X < 0, then we *actually* wanted to return -0.0 + if (mir->canBeNegativeDividend()) { + if (mir->isTruncated()) { + // -0.0|0 == 0 + } else { + MOZ_ASSERT(mir->fallible()); + // See if X < 0 + masm.ma_b(dest, Imm32(0), &done, Assembler::NotEqual, ShortJump); + bailoutCmp32(Assembler::Signed, callTemp, Imm32(0), ins->snapshot()); + } + } + masm.bind(&done); +} + +void CodeGenerator::visitModPowTwoI(LModPowTwoI* ins) { + Register in = ToRegister(ins->getOperand(0)); + Register out = ToRegister(ins->getDef(0)); + MMod* mir = ins->mir(); + Label negative, done; + + masm.move32(in, out); + masm.ma_b(in, in, &done, Assembler::Zero, ShortJump); + // Switch based on sign of the lhs. + // Positive numbers are just a bitmask + masm.ma_b(in, in, &negative, Assembler::Signed, ShortJump); + { + masm.and32(Imm32((1 << ins->shift()) - 1), out); + masm.ma_b(&done, ShortJump); + } + + // Negative numbers need a negate, bitmask, negate + { + masm.bind(&negative); + masm.neg32(out); + masm.and32(Imm32((1 << ins->shift()) - 1), out); + masm.neg32(out); + } + if (mir->canBeNegativeDividend()) { + if (!mir->isTruncated()) { + MOZ_ASSERT(mir->fallible()); + bailoutCmp32(Assembler::Equal, out, zero, ins->snapshot()); + } else { + // -0|0 == 0 + } + } + masm.bind(&done); +} + +void CodeGenerator::visitModMaskI(LModMaskI* ins) { + Register src = ToRegister(ins->getOperand(0)); + Register dest = ToRegister(ins->getDef(0)); + Register tmp0 = ToRegister(ins->getTemp(0)); + Register tmp1 = ToRegister(ins->getTemp(1)); + MMod* mir = ins->mir(); + + if (!mir->isTruncated() && mir->canBeNegativeDividend()) { + MOZ_ASSERT(mir->fallible()); + + Label bail; + masm.ma_mod_mask(src, dest, tmp0, tmp1, ins->shift(), &bail); + bailoutFrom(&bail, ins->snapshot()); + } else { + masm.ma_mod_mask(src, dest, tmp0, tmp1, ins->shift(), nullptr); + } +} + +void CodeGenerator::visitBitNotI(LBitNotI* ins) { + const LAllocation* input = ins->getOperand(0); + const LDefinition* dest = ins->getDef(0); + MOZ_ASSERT(!input->isConstant()); + + masm.ma_not(ToRegister(dest), ToRegister(input)); +} + +void CodeGenerator::visitBitOpI(LBitOpI* ins) { + const LAllocation* lhs = ins->getOperand(0); + const LAllocation* rhs = ins->getOperand(1); + const LDefinition* dest = ins->getDef(0); + // all of these bitops should be either imm32's, or integer registers. + switch (ins->bitop()) { + case JSOp::BitOr: + if (rhs->isConstant()) { + masm.ma_or(ToRegister(dest), ToRegister(lhs), Imm32(ToInt32(rhs))); + } else { + masm.as_or(ToRegister(dest), ToRegister(lhs), ToRegister(rhs)); + } + break; + case JSOp::BitXor: + if (rhs->isConstant()) { + masm.ma_xor(ToRegister(dest), ToRegister(lhs), Imm32(ToInt32(rhs))); + } else { + masm.as_xor(ToRegister(dest), ToRegister(lhs), ToRegister(rhs)); + } + break; + case JSOp::BitAnd: + if (rhs->isConstant()) { + masm.ma_and(ToRegister(dest), ToRegister(lhs), Imm32(ToInt32(rhs))); + } else { + masm.as_and(ToRegister(dest), ToRegister(lhs), ToRegister(rhs)); + } + break; + default: + MOZ_CRASH("unexpected binary opcode"); + } +} + +void CodeGenerator::visitBitOpI64(LBitOpI64* lir) { + const LInt64Allocation lhs = lir->getInt64Operand(LBitOpI64::Lhs); + const LInt64Allocation rhs = lir->getInt64Operand(LBitOpI64::Rhs); + + MOZ_ASSERT(ToOutRegister64(lir) == ToRegister64(lhs)); + + switch (lir->bitop()) { + case JSOp::BitOr: + if (IsConstant(rhs)) { + masm.or64(Imm64(ToInt64(rhs)), ToRegister64(lhs)); + } else { + masm.or64(ToOperandOrRegister64(rhs), ToRegister64(lhs)); + } + break; + case JSOp::BitXor: + if (IsConstant(rhs)) { + masm.xor64(Imm64(ToInt64(rhs)), ToRegister64(lhs)); + } else { + masm.xor64(ToOperandOrRegister64(rhs), ToRegister64(lhs)); + } + break; + case JSOp::BitAnd: + if (IsConstant(rhs)) { + masm.and64(Imm64(ToInt64(rhs)), ToRegister64(lhs)); + } else { + masm.and64(ToOperandOrRegister64(rhs), ToRegister64(lhs)); + } + break; + default: + MOZ_CRASH("unexpected binary opcode"); + } +} + +void CodeGenerator::visitShiftI(LShiftI* ins) { + Register lhs = ToRegister(ins->lhs()); + const LAllocation* rhs = ins->rhs(); + Register dest = ToRegister(ins->output()); + + if (rhs->isConstant()) { + int32_t shift = ToInt32(rhs) & 0x1F; + switch (ins->bitop()) { + case JSOp::Lsh: + if (shift) { + masm.ma_sll(dest, lhs, Imm32(shift)); + } else { + masm.move32(lhs, dest); + } + break; + case JSOp::Rsh: + if (shift) { + masm.ma_sra(dest, lhs, Imm32(shift)); + } else { + masm.move32(lhs, dest); + } + break; + case JSOp::Ursh: + if (shift) { + masm.ma_srl(dest, lhs, Imm32(shift)); + } else { + // x >>> 0 can overflow. + if (ins->mir()->toUrsh()->fallible()) { + bailoutCmp32(Assembler::LessThan, lhs, Imm32(0), ins->snapshot()); + } + masm.move32(lhs, dest); + } + break; + default: + MOZ_CRASH("Unexpected shift op"); + } + } else { + // The shift amounts should be AND'ed into the 0-31 range + masm.ma_and(dest, ToRegister(rhs), Imm32(0x1F)); + + switch (ins->bitop()) { + case JSOp::Lsh: + masm.ma_sll(dest, lhs, dest); + break; + case JSOp::Rsh: + masm.ma_sra(dest, lhs, dest); + break; + case JSOp::Ursh: + masm.ma_srl(dest, lhs, dest); + if (ins->mir()->toUrsh()->fallible()) { + // x >>> 0 can overflow. + bailoutCmp32(Assembler::LessThan, dest, Imm32(0), ins->snapshot()); + } + break; + default: + MOZ_CRASH("Unexpected shift op"); + } + } +} + +void CodeGenerator::visitShiftI64(LShiftI64* lir) { + const LInt64Allocation lhs = lir->getInt64Operand(LShiftI64::Lhs); + LAllocation* rhs = lir->getOperand(LShiftI64::Rhs); + + MOZ_ASSERT(ToOutRegister64(lir) == ToRegister64(lhs)); + + if (rhs->isConstant()) { + int32_t shift = int32_t(rhs->toConstant()->toInt64() & 0x3F); + switch (lir->bitop()) { + case JSOp::Lsh: + if (shift) { + masm.lshift64(Imm32(shift), ToRegister64(lhs)); + } + break; + case JSOp::Rsh: + if (shift) { + masm.rshift64Arithmetic(Imm32(shift), ToRegister64(lhs)); + } + break; + case JSOp::Ursh: + if (shift) { + masm.rshift64(Imm32(shift), ToRegister64(lhs)); + } + break; + default: + MOZ_CRASH("Unexpected shift op"); + } + return; + } + + switch (lir->bitop()) { + case JSOp::Lsh: + masm.lshift64(ToRegister(rhs), ToRegister64(lhs)); + break; + case JSOp::Rsh: + masm.rshift64Arithmetic(ToRegister(rhs), ToRegister64(lhs)); + break; + case JSOp::Ursh: + masm.rshift64(ToRegister(rhs), ToRegister64(lhs)); + break; + default: + MOZ_CRASH("Unexpected shift op"); + } +} + +void CodeGenerator::visitRotateI64(LRotateI64* lir) { + MRotate* mir = lir->mir(); + LAllocation* count = lir->count(); + + Register64 input = ToRegister64(lir->input()); + Register64 output = ToOutRegister64(lir); + Register temp = ToTempRegisterOrInvalid(lir->temp()); + +#ifdef JS_CODEGEN_MIPS64 + MOZ_ASSERT(input == output); +#endif + + if (count->isConstant()) { + int32_t c = int32_t(count->toConstant()->toInt64() & 0x3F); + if (!c) { +#ifdef JS_CODEGEN_MIPS32 + masm.move64(input, output); +#endif + return; + } + if (mir->isLeftRotate()) { + masm.rotateLeft64(Imm32(c), input, output, temp); + } else { + masm.rotateRight64(Imm32(c), input, output, temp); + } + } else { + if (mir->isLeftRotate()) { + masm.rotateLeft64(ToRegister(count), input, output, temp); + } else { + masm.rotateRight64(ToRegister(count), input, output, temp); + } + } +} + +void CodeGenerator::visitUrshD(LUrshD* ins) { + Register lhs = ToRegister(ins->lhs()); + Register temp = ToRegister(ins->temp()); + + const LAllocation* rhs = ins->rhs(); + FloatRegister out = ToFloatRegister(ins->output()); + + if (rhs->isConstant()) { + masm.ma_srl(temp, lhs, Imm32(ToInt32(rhs))); + } else { + masm.ma_srl(temp, lhs, ToRegister(rhs)); + } + + masm.convertUInt32ToDouble(temp, out); +} + +void CodeGenerator::visitClzI(LClzI* ins) { + Register input = ToRegister(ins->input()); + Register output = ToRegister(ins->output()); + + masm.as_clz(output, input); +} + +void CodeGenerator::visitCtzI(LCtzI* ins) { + Register input = ToRegister(ins->input()); + Register output = ToRegister(ins->output()); + + masm.ma_ctz(output, input); +} + +void CodeGenerator::visitPopcntI(LPopcntI* ins) { + Register input = ToRegister(ins->input()); + Register output = ToRegister(ins->output()); + Register tmp = ToRegister(ins->temp0()); + + masm.popcnt32(input, output, tmp); +} + +void CodeGenerator::visitPopcntI64(LPopcntI64* ins) { + Register64 input = ToRegister64(ins->getInt64Operand(0)); + Register64 output = ToOutRegister64(ins); + Register tmp = ToRegister(ins->getTemp(0)); + + masm.popcnt64(input, output, tmp); +} + +void CodeGenerator::visitPowHalfD(LPowHalfD* ins) { + FloatRegister input = ToFloatRegister(ins->input()); + FloatRegister output = ToFloatRegister(ins->output()); + + Label done, skip; + + // Masm.pow(-Infinity, 0.5) == Infinity. + masm.loadConstantDouble(NegativeInfinity<double>(), ScratchDoubleReg); + masm.ma_bc1d(input, ScratchDoubleReg, &skip, + Assembler::DoubleNotEqualOrUnordered, ShortJump); + masm.as_negd(output, ScratchDoubleReg); + masm.ma_b(&done, ShortJump); + + masm.bind(&skip); + // Math.pow(-0, 0.5) == 0 == Math.pow(0, 0.5). + // Adding 0 converts any -0 to 0. + masm.loadConstantDouble(0.0, ScratchDoubleReg); + masm.as_addd(output, input, ScratchDoubleReg); + masm.as_sqrtd(output, output); + + masm.bind(&done); +} + +MoveOperand CodeGeneratorMIPSShared::toMoveOperand(LAllocation a) const { + if (a.isGeneralReg()) { + return MoveOperand(ToRegister(a)); + } + if (a.isFloatReg()) { + return MoveOperand(ToFloatRegister(a)); + } + MoveOperand::Kind kind = + a.isStackArea() ? MoveOperand::EFFECTIVE_ADDRESS : MoveOperand::MEMORY; + Address address = ToAddress(a); + MOZ_ASSERT((address.offset & 3) == 0); + return MoveOperand(address, kind); +} + +void CodeGenerator::visitMathD(LMathD* math) { + FloatRegister src1 = ToFloatRegister(math->getOperand(0)); + FloatRegister src2 = ToFloatRegister(math->getOperand(1)); + FloatRegister output = ToFloatRegister(math->getDef(0)); + + switch (math->jsop()) { + case JSOp::Add: + masm.as_addd(output, src1, src2); + break; + case JSOp::Sub: + masm.as_subd(output, src1, src2); + break; + case JSOp::Mul: + masm.as_muld(output, src1, src2); + break; + case JSOp::Div: + masm.as_divd(output, src1, src2); + break; + default: + MOZ_CRASH("unexpected opcode"); + } +} + +void CodeGenerator::visitMathF(LMathF* math) { + FloatRegister src1 = ToFloatRegister(math->getOperand(0)); + FloatRegister src2 = ToFloatRegister(math->getOperand(1)); + FloatRegister output = ToFloatRegister(math->getDef(0)); + + switch (math->jsop()) { + case JSOp::Add: + masm.as_adds(output, src1, src2); + break; + case JSOp::Sub: + masm.as_subs(output, src1, src2); + break; + case JSOp::Mul: + masm.as_muls(output, src1, src2); + break; + case JSOp::Div: + masm.as_divs(output, src1, src2); + break; + default: + MOZ_CRASH("unexpected opcode"); + } +} + +void CodeGenerator::visitTruncateDToInt32(LTruncateDToInt32* ins) { + emitTruncateDouble(ToFloatRegister(ins->input()), ToRegister(ins->output()), + ins->mir()); +} + +void CodeGenerator::visitTruncateFToInt32(LTruncateFToInt32* ins) { + emitTruncateFloat32(ToFloatRegister(ins->input()), ToRegister(ins->output()), + ins->mir()); +} + +void CodeGenerator::visitWasmBuiltinTruncateDToInt32( + LWasmBuiltinTruncateDToInt32* lir) { + emitTruncateDouble(ToFloatRegister(lir->getOperand(0)), + ToRegister(lir->getDef(0)), lir->mir()); +} + +void CodeGenerator::visitWasmBuiltinTruncateFToInt32( + LWasmBuiltinTruncateFToInt32* lir) { + emitTruncateFloat32(ToFloatRegister(lir->getOperand(0)), + ToRegister(lir->getDef(0)), lir->mir()); +} + +void CodeGenerator::visitWasmTruncateToInt32(LWasmTruncateToInt32* lir) { + auto input = ToFloatRegister(lir->input()); + auto output = ToRegister(lir->output()); + + MWasmTruncateToInt32* mir = lir->mir(); + MIRType fromType = mir->input()->type(); + + MOZ_ASSERT(fromType == MIRType::Double || fromType == MIRType::Float32); + + auto* ool = new (alloc()) OutOfLineWasmTruncateCheck(mir, input, output); + addOutOfLineCode(ool, mir); + + Label* oolEntry = ool->entry(); + if (mir->isUnsigned()) { + if (fromType == MIRType::Double) { + masm.wasmTruncateDoubleToUInt32(input, output, mir->isSaturating(), + oolEntry); + } else if (fromType == MIRType::Float32) { + masm.wasmTruncateFloat32ToUInt32(input, output, mir->isSaturating(), + oolEntry); + } else { + MOZ_CRASH("unexpected type"); + } + + masm.bind(ool->rejoin()); + return; + } + + if (fromType == MIRType::Double) { + masm.wasmTruncateDoubleToInt32(input, output, mir->isSaturating(), + oolEntry); + } else if (fromType == MIRType::Float32) { + masm.wasmTruncateFloat32ToInt32(input, output, mir->isSaturating(), + oolEntry); + } else { + MOZ_CRASH("unexpected type"); + } + + masm.bind(ool->rejoin()); +} + +void CodeGeneratorMIPSShared::visitOutOfLineBailout(OutOfLineBailout* ool) { + // Push snapshotOffset and make sure stack is aligned. + masm.subPtr(Imm32(sizeof(Value)), StackPointer); + masm.storePtr(ImmWord(ool->snapshot()->snapshotOffset()), + Address(StackPointer, 0)); + + masm.jump(&deoptLabel_); +} + +void CodeGeneratorMIPSShared::visitOutOfLineWasmTruncateCheck( + OutOfLineWasmTruncateCheck* ool) { + if (ool->toType() == MIRType::Int32) { + masm.outOfLineWasmTruncateToInt32Check( + ool->input(), ool->output(), ool->fromType(), ool->flags(), + ool->rejoin(), ool->bytecodeOffset()); + } else { + MOZ_ASSERT(ool->toType() == MIRType::Int64); + masm.outOfLineWasmTruncateToInt64Check( + ool->input(), ool->output64(), ool->fromType(), ool->flags(), + ool->rejoin(), ool->bytecodeOffset()); + } +} + +void CodeGenerator::visitCopySignF(LCopySignF* ins) { + FloatRegister lhs = ToFloatRegister(ins->getOperand(0)); + FloatRegister rhs = ToFloatRegister(ins->getOperand(1)); + FloatRegister output = ToFloatRegister(ins->getDef(0)); + + Register lhsi = ToRegister(ins->getTemp(0)); + Register rhsi = ToRegister(ins->getTemp(1)); + + masm.moveFromFloat32(lhs, lhsi); + masm.moveFromFloat32(rhs, rhsi); + + // Combine. + masm.ma_ins(rhsi, lhsi, 0, 31); + + masm.moveToFloat32(rhsi, output); +} + +void CodeGenerator::visitCopySignD(LCopySignD* ins) { + FloatRegister lhs = ToFloatRegister(ins->getOperand(0)); + FloatRegister rhs = ToFloatRegister(ins->getOperand(1)); + FloatRegister output = ToFloatRegister(ins->getDef(0)); + + Register lhsi = ToRegister(ins->getTemp(0)); + Register rhsi = ToRegister(ins->getTemp(1)); + + // Manipulate high words of double inputs. + masm.moveFromDoubleHi(lhs, lhsi); + masm.moveFromDoubleHi(rhs, rhsi); + + // Combine. + masm.ma_ins(rhsi, lhsi, 0, 31); + + masm.moveToDoubleHi(rhsi, output); +} + +void CodeGenerator::visitValue(LValue* value) { + const ValueOperand out = ToOutValue(value); + + masm.moveValue(value->value(), out); +} + +void CodeGenerator::visitDouble(LDouble* ins) { + const LDefinition* out = ins->getDef(0); + + masm.loadConstantDouble(ins->value(), ToFloatRegister(out)); +} + +void CodeGenerator::visitFloat32(LFloat32* ins) { + const LDefinition* out = ins->getDef(0); + masm.loadConstantFloat32(ins->value(), ToFloatRegister(out)); +} + +void CodeGenerator::visitTestDAndBranch(LTestDAndBranch* test) { + FloatRegister input = ToFloatRegister(test->input()); + + MBasicBlock* ifTrue = test->ifTrue(); + MBasicBlock* ifFalse = test->ifFalse(); + + masm.loadConstantDouble(0.0, ScratchDoubleReg); + // If 0, or NaN, the result is false. + + if (isNextBlock(ifFalse->lir())) { + branchToBlock(Assembler::DoubleFloat, input, ScratchDoubleReg, ifTrue, + Assembler::DoubleNotEqual); + } else { + branchToBlock(Assembler::DoubleFloat, input, ScratchDoubleReg, ifFalse, + Assembler::DoubleEqualOrUnordered); + jumpToBlock(ifTrue); + } +} + +void CodeGenerator::visitTestFAndBranch(LTestFAndBranch* test) { + FloatRegister input = ToFloatRegister(test->input()); + + MBasicBlock* ifTrue = test->ifTrue(); + MBasicBlock* ifFalse = test->ifFalse(); + + masm.loadConstantFloat32(0.0f, ScratchFloat32Reg); + // If 0, or NaN, the result is false. + + if (isNextBlock(ifFalse->lir())) { + branchToBlock(Assembler::SingleFloat, input, ScratchFloat32Reg, ifTrue, + Assembler::DoubleNotEqual); + } else { + branchToBlock(Assembler::SingleFloat, input, ScratchFloat32Reg, ifFalse, + Assembler::DoubleEqualOrUnordered); + jumpToBlock(ifTrue); + } +} + +void CodeGenerator::visitCompareD(LCompareD* comp) { + FloatRegister lhs = ToFloatRegister(comp->left()); + FloatRegister rhs = ToFloatRegister(comp->right()); + Register dest = ToRegister(comp->output()); + + Assembler::DoubleCondition cond = JSOpToDoubleCondition(comp->mir()->jsop()); + masm.ma_cmp_set_double(dest, lhs, rhs, cond); +} + +void CodeGenerator::visitCompareF(LCompareF* comp) { + FloatRegister lhs = ToFloatRegister(comp->left()); + FloatRegister rhs = ToFloatRegister(comp->right()); + Register dest = ToRegister(comp->output()); + + Assembler::DoubleCondition cond = JSOpToDoubleCondition(comp->mir()->jsop()); + masm.ma_cmp_set_float32(dest, lhs, rhs, cond); +} + +void CodeGenerator::visitCompareDAndBranch(LCompareDAndBranch* comp) { + FloatRegister lhs = ToFloatRegister(comp->left()); + FloatRegister rhs = ToFloatRegister(comp->right()); + + Assembler::DoubleCondition cond = + JSOpToDoubleCondition(comp->cmpMir()->jsop()); + MBasicBlock* ifTrue = comp->ifTrue(); + MBasicBlock* ifFalse = comp->ifFalse(); + + if (isNextBlock(ifFalse->lir())) { + branchToBlock(Assembler::DoubleFloat, lhs, rhs, ifTrue, cond); + } else { + branchToBlock(Assembler::DoubleFloat, lhs, rhs, ifFalse, + Assembler::InvertCondition(cond)); + jumpToBlock(ifTrue); + } +} + +void CodeGenerator::visitCompareFAndBranch(LCompareFAndBranch* comp) { + FloatRegister lhs = ToFloatRegister(comp->left()); + FloatRegister rhs = ToFloatRegister(comp->right()); + + Assembler::DoubleCondition cond = + JSOpToDoubleCondition(comp->cmpMir()->jsop()); + MBasicBlock* ifTrue = comp->ifTrue(); + MBasicBlock* ifFalse = comp->ifFalse(); + + if (isNextBlock(ifFalse->lir())) { + branchToBlock(Assembler::SingleFloat, lhs, rhs, ifTrue, cond); + } else { + branchToBlock(Assembler::SingleFloat, lhs, rhs, ifFalse, + Assembler::InvertCondition(cond)); + jumpToBlock(ifTrue); + } +} + +void CodeGenerator::visitBitAndAndBranch(LBitAndAndBranch* lir) { + if (lir->right()->isConstant()) { + masm.ma_and(ScratchRegister, ToRegister(lir->left()), + Imm32(ToInt32(lir->right()))); + } else { + masm.as_and(ScratchRegister, ToRegister(lir->left()), + ToRegister(lir->right())); + } + emitBranch(ScratchRegister, ScratchRegister, lir->cond(), lir->ifTrue(), + lir->ifFalse()); +} + +void CodeGenerator::visitWasmUint32ToDouble(LWasmUint32ToDouble* lir) { + masm.convertUInt32ToDouble(ToRegister(lir->input()), + ToFloatRegister(lir->output())); +} + +void CodeGenerator::visitWasmUint32ToFloat32(LWasmUint32ToFloat32* lir) { + masm.convertUInt32ToFloat32(ToRegister(lir->input()), + ToFloatRegister(lir->output())); +} + +void CodeGenerator::visitNotI(LNotI* ins) { + masm.cmp32Set(Assembler::Equal, ToRegister(ins->input()), Imm32(0), + ToRegister(ins->output())); +} + +void CodeGenerator::visitNotD(LNotD* ins) { + // Since this operation is not, we want to set a bit if + // the double is falsey, which means 0.0, -0.0 or NaN. + FloatRegister in = ToFloatRegister(ins->input()); + Register dest = ToRegister(ins->output()); + + masm.loadConstantDouble(0.0, ScratchDoubleReg); + masm.ma_cmp_set_double(dest, in, ScratchDoubleReg, + Assembler::DoubleEqualOrUnordered); +} + +void CodeGenerator::visitNotF(LNotF* ins) { + // Since this operation is not, we want to set a bit if + // the float32 is falsey, which means 0.0, -0.0 or NaN. + FloatRegister in = ToFloatRegister(ins->input()); + Register dest = ToRegister(ins->output()); + + masm.loadConstantFloat32(0.0f, ScratchFloat32Reg); + masm.ma_cmp_set_float32(dest, in, ScratchFloat32Reg, + Assembler::DoubleEqualOrUnordered); +} + +void CodeGenerator::visitMemoryBarrier(LMemoryBarrier* ins) { + masm.memoryBarrier(ins->type()); +} + +void CodeGeneratorMIPSShared::generateInvalidateEpilogue() { + // Ensure that there is enough space in the buffer for the OsiPoint + // patching to occur. Otherwise, we could overwrite the invalidation + // epilogue. + for (size_t i = 0; i < sizeof(void*); i += Assembler::NopSize()) { + masm.nop(); + } + + masm.bind(&invalidate_); + + // Push the return address of the point that we bailed out at to the stack + masm.Push(ra); + + // Push the Ion script onto the stack (when we determine what that + // pointer is). + invalidateEpilogueData_ = masm.pushWithPatch(ImmWord(uintptr_t(-1))); + + // Jump to the invalidator which will replace the current frame. + TrampolinePtr thunk = gen->jitRuntime()->getInvalidationThunk(); + masm.jump(thunk); +} + +class js::jit::OutOfLineTableSwitch + : public OutOfLineCodeBase<CodeGeneratorMIPSShared> { + MTableSwitch* mir_; + CodeLabel jumpLabel_; + + void accept(CodeGeneratorMIPSShared* codegen) { + codegen->visitOutOfLineTableSwitch(this); + } + + public: + OutOfLineTableSwitch(MTableSwitch* mir) : mir_(mir) {} + + MTableSwitch* mir() const { return mir_; } + + CodeLabel* jumpLabel() { return &jumpLabel_; } +}; + +void CodeGeneratorMIPSShared::visitOutOfLineTableSwitch( + OutOfLineTableSwitch* ool) { + MTableSwitch* mir = ool->mir(); + + masm.haltingAlign(sizeof(void*)); + masm.bind(ool->jumpLabel()); + masm.addCodeLabel(*ool->jumpLabel()); + + for (size_t i = 0; i < mir->numCases(); i++) { + LBlock* caseblock = skipTrivialBlocks(mir->getCase(i))->lir(); + Label* caseheader = caseblock->label(); + uint32_t caseoffset = caseheader->offset(); + + // The entries of the jump table need to be absolute addresses and thus + // must be patched after codegen is finished. + CodeLabel cl; + masm.writeCodePointer(&cl); + cl.target()->bind(caseoffset); + masm.addCodeLabel(cl); + } +} + +void CodeGeneratorMIPSShared::emitTableSwitchDispatch(MTableSwitch* mir, + Register index, + Register base) { + Label* defaultcase = skipTrivialBlocks(mir->getDefault())->lir()->label(); + + // Lower value with low value + if (mir->low() != 0) { + masm.subPtr(Imm32(mir->low()), index); + } + + // Jump to default case if input is out of range + int32_t cases = mir->numCases(); + masm.branchPtr(Assembler::AboveOrEqual, index, ImmWord(cases), defaultcase); + + // To fill in the CodeLabels for the case entries, we need to first + // generate the case entries (we don't yet know their offsets in the + // instruction stream). + OutOfLineTableSwitch* ool = new (alloc()) OutOfLineTableSwitch(mir); + addOutOfLineCode(ool, mir); + + // Compute the position where a pointer to the right case stands. + masm.ma_li(base, ool->jumpLabel()); + + BaseIndex pointer(base, index, ScalePointer); + + // Jump to the right case + masm.branchToComputedAddress(pointer); +} + +void CodeGenerator::visitWasmHeapBase(LWasmHeapBase* ins) { + MOZ_ASSERT(ins->instance()->isBogus()); + masm.movePtr(HeapReg, ToRegister(ins->output())); +} + +template <typename T> +void CodeGeneratorMIPSShared::emitWasmLoad(T* lir) { + const MWasmLoad* mir = lir->mir(); + SecondScratchRegisterScope scratch2(masm); + + Register ptr = ToRegister(lir->ptr()); + Register ptrScratch = InvalidReg; + if (!lir->ptrCopy()->isBogusTemp()) { + ptrScratch = ToRegister(lir->ptrCopy()); + } + + if (mir->base()->type() == MIRType::Int32) { + masm.move32To64ZeroExtend(ptr, Register64(scratch2)); + ptr = scratch2; + ptrScratch = ptrScratch != InvalidReg ? scratch2 : InvalidReg; + } + + if (IsUnaligned(mir->access())) { + if (IsFloatingPointType(mir->type())) { + masm.wasmUnalignedLoadFP(mir->access(), HeapReg, ptr, ptrScratch, + ToFloatRegister(lir->output()), + ToRegister(lir->getTemp(1))); + } else { + masm.wasmUnalignedLoad(mir->access(), HeapReg, ptr, ptrScratch, + ToRegister(lir->output()), + ToRegister(lir->getTemp(1))); + } + } else { + masm.wasmLoad(mir->access(), HeapReg, ptr, ptrScratch, + ToAnyRegister(lir->output())); + } +} + +void CodeGenerator::visitWasmLoad(LWasmLoad* lir) { emitWasmLoad(lir); } + +void CodeGenerator::visitWasmUnalignedLoad(LWasmUnalignedLoad* lir) { + emitWasmLoad(lir); +} + +template <typename T> +void CodeGeneratorMIPSShared::emitWasmStore(T* lir) { + const MWasmStore* mir = lir->mir(); + SecondScratchRegisterScope scratch2(masm); + + Register ptr = ToRegister(lir->ptr()); + Register ptrScratch = InvalidReg; + if (!lir->ptrCopy()->isBogusTemp()) { + ptrScratch = ToRegister(lir->ptrCopy()); + } + + if (mir->base()->type() == MIRType::Int32) { + masm.move32To64ZeroExtend(ptr, Register64(scratch2)); + ptr = scratch2; + ptrScratch = ptrScratch != InvalidReg ? scratch2 : InvalidReg; + } + + if (IsUnaligned(mir->access())) { + if (mir->access().type() == Scalar::Float32 || + mir->access().type() == Scalar::Float64) { + masm.wasmUnalignedStoreFP(mir->access(), ToFloatRegister(lir->value()), + HeapReg, ptr, ptrScratch, + ToRegister(lir->getTemp(1))); + } else { + masm.wasmUnalignedStore(mir->access(), ToRegister(lir->value()), HeapReg, + ptr, ptrScratch, ToRegister(lir->getTemp(1))); + } + } else { + masm.wasmStore(mir->access(), ToAnyRegister(lir->value()), HeapReg, ptr, + ptrScratch); + } +} + +void CodeGenerator::visitWasmStore(LWasmStore* lir) { emitWasmStore(lir); } + +void CodeGenerator::visitWasmUnalignedStore(LWasmUnalignedStore* lir) { + emitWasmStore(lir); +} + +void CodeGenerator::visitAsmJSLoadHeap(LAsmJSLoadHeap* ins) { + const MAsmJSLoadHeap* mir = ins->mir(); + const LAllocation* ptr = ins->ptr(); + const LDefinition* out = ins->output(); + const LAllocation* boundsCheckLimit = ins->boundsCheckLimit(); + + bool isSigned; + int size; + bool isFloat = false; + switch (mir->access().type()) { + case Scalar::Int8: + isSigned = true; + size = 8; + break; + case Scalar::Uint8: + isSigned = false; + size = 8; + break; + case Scalar::Int16: + isSigned = true; + size = 16; + break; + case Scalar::Uint16: + isSigned = false; + size = 16; + break; + case Scalar::Int32: + isSigned = true; + size = 32; + break; + case Scalar::Uint32: + isSigned = false; + size = 32; + break; + case Scalar::Float64: + isFloat = true; + size = 64; + break; + case Scalar::Float32: + isFloat = true; + size = 32; + break; + default: + MOZ_CRASH("unexpected array type"); + } + + if (ptr->isConstant()) { + MOZ_ASSERT(!mir->needsBoundsCheck()); + int32_t ptrImm = ptr->toConstant()->toInt32(); + MOZ_ASSERT(ptrImm >= 0); + if (isFloat) { + if (size == 32) { + masm.loadFloat32(Address(HeapReg, ptrImm), ToFloatRegister(out)); + } else { + masm.loadDouble(Address(HeapReg, ptrImm), ToFloatRegister(out)); + } + } else { + masm.ma_load(ToRegister(out), Address(HeapReg, ptrImm), + static_cast<LoadStoreSize>(size), + isSigned ? SignExtend : ZeroExtend); + } + return; + } + + Register ptrReg = ToRegister(ptr); + + if (!mir->needsBoundsCheck()) { + if (isFloat) { + if (size == 32) { + masm.loadFloat32(BaseIndex(HeapReg, ptrReg, TimesOne), + ToFloatRegister(out)); + } else { + masm.loadDouble(BaseIndex(HeapReg, ptrReg, TimesOne), + ToFloatRegister(out)); + } + } else { + masm.ma_load(ToRegister(out), BaseIndex(HeapReg, ptrReg, TimesOne), + static_cast<LoadStoreSize>(size), + isSigned ? SignExtend : ZeroExtend); + } + return; + } + + Label done, outOfRange; + masm.wasmBoundsCheck32(Assembler::AboveOrEqual, ptrReg, + ToRegister(boundsCheckLimit), &outOfRange); + // Offset is ok, let's load value. + if (isFloat) { + if (size == 32) { + masm.loadFloat32(BaseIndex(HeapReg, ptrReg, TimesOne), + ToFloatRegister(out)); + } else { + masm.loadDouble(BaseIndex(HeapReg, ptrReg, TimesOne), + ToFloatRegister(out)); + } + } else { + masm.ma_load(ToRegister(out), BaseIndex(HeapReg, ptrReg, TimesOne), + static_cast<LoadStoreSize>(size), + isSigned ? SignExtend : ZeroExtend); + } + masm.ma_b(&done, ShortJump); + masm.bind(&outOfRange); + // Offset is out of range. Load default values. + if (isFloat) { + if (size == 32) { + masm.loadConstantFloat32(float(GenericNaN()), ToFloatRegister(out)); + } else { + masm.loadConstantDouble(GenericNaN(), ToFloatRegister(out)); + } + } else { + masm.move32(Imm32(0), ToRegister(out)); + } + masm.bind(&done); +} + +void CodeGenerator::visitAsmJSStoreHeap(LAsmJSStoreHeap* ins) { + const MAsmJSStoreHeap* mir = ins->mir(); + const LAllocation* value = ins->value(); + const LAllocation* ptr = ins->ptr(); + const LAllocation* boundsCheckLimit = ins->boundsCheckLimit(); + + bool isSigned; + int size; + bool isFloat = false; + switch (mir->access().type()) { + case Scalar::Int8: + isSigned = true; + size = 8; + break; + case Scalar::Uint8: + isSigned = false; + size = 8; + break; + case Scalar::Int16: + isSigned = true; + size = 16; + break; + case Scalar::Uint16: + isSigned = false; + size = 16; + break; + case Scalar::Int32: + isSigned = true; + size = 32; + break; + case Scalar::Uint32: + isSigned = false; + size = 32; + break; + case Scalar::Float64: + isFloat = true; + size = 64; + break; + case Scalar::Float32: + isFloat = true; + size = 32; + break; + default: + MOZ_CRASH("unexpected array type"); + } + + if (ptr->isConstant()) { + MOZ_ASSERT(!mir->needsBoundsCheck()); + int32_t ptrImm = ptr->toConstant()->toInt32(); + MOZ_ASSERT(ptrImm >= 0); + + if (isFloat) { + FloatRegister freg = ToFloatRegister(value); + Address addr(HeapReg, ptrImm); + if (size == 32) { + masm.storeFloat32(freg, addr); + } else { + masm.storeDouble(freg, addr); + } + } else { + masm.ma_store(ToRegister(value), Address(HeapReg, ptrImm), + static_cast<LoadStoreSize>(size), + isSigned ? SignExtend : ZeroExtend); + } + return; + } + + Register ptrReg = ToRegister(ptr); + Address dstAddr(ptrReg, 0); + + if (!mir->needsBoundsCheck()) { + if (isFloat) { + FloatRegister freg = ToFloatRegister(value); + BaseIndex bi(HeapReg, ptrReg, TimesOne); + if (size == 32) { + masm.storeFloat32(freg, bi); + } else { + masm.storeDouble(freg, bi); + } + } else { + masm.ma_store(ToRegister(value), BaseIndex(HeapReg, ptrReg, TimesOne), + static_cast<LoadStoreSize>(size), + isSigned ? SignExtend : ZeroExtend); + } + return; + } + + Label outOfRange; + masm.wasmBoundsCheck32(Assembler::AboveOrEqual, ptrReg, + ToRegister(boundsCheckLimit), &outOfRange); + + // Offset is ok, let's store value. + if (isFloat) { + if (size == 32) { + masm.storeFloat32(ToFloatRegister(value), + BaseIndex(HeapReg, ptrReg, TimesOne)); + } else + masm.storeDouble(ToFloatRegister(value), + BaseIndex(HeapReg, ptrReg, TimesOne)); + } else { + masm.ma_store(ToRegister(value), BaseIndex(HeapReg, ptrReg, TimesOne), + static_cast<LoadStoreSize>(size), + isSigned ? SignExtend : ZeroExtend); + } + + masm.bind(&outOfRange); +} + +void CodeGenerator::visitWasmCompareExchangeHeap( + LWasmCompareExchangeHeap* ins) { + MWasmCompareExchangeHeap* mir = ins->mir(); + Register ptrReg = ToRegister(ins->ptr()); + BaseIndex srcAddr(HeapReg, ptrReg, TimesOne, mir->access().offset()); + MOZ_ASSERT(ins->addrTemp()->isBogusTemp()); + + Register oldval = ToRegister(ins->oldValue()); + Register newval = ToRegister(ins->newValue()); + Register valueTemp = ToTempRegisterOrInvalid(ins->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(ins->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(ins->maskTemp()); + + masm.wasmCompareExchange(mir->access(), srcAddr, oldval, newval, valueTemp, + offsetTemp, maskTemp, ToRegister(ins->output())); +} + +void CodeGenerator::visitWasmAtomicExchangeHeap(LWasmAtomicExchangeHeap* ins) { + MWasmAtomicExchangeHeap* mir = ins->mir(); + Register ptrReg = ToRegister(ins->ptr()); + Register value = ToRegister(ins->value()); + BaseIndex srcAddr(HeapReg, ptrReg, TimesOne, mir->access().offset()); + MOZ_ASSERT(ins->addrTemp()->isBogusTemp()); + + Register valueTemp = ToTempRegisterOrInvalid(ins->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(ins->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(ins->maskTemp()); + + masm.wasmAtomicExchange(mir->access(), srcAddr, value, valueTemp, offsetTemp, + maskTemp, ToRegister(ins->output())); +} + +void CodeGenerator::visitWasmAtomicBinopHeap(LWasmAtomicBinopHeap* ins) { + MOZ_ASSERT(ins->mir()->hasUses()); + MOZ_ASSERT(ins->addrTemp()->isBogusTemp()); + + MWasmAtomicBinopHeap* mir = ins->mir(); + Register ptrReg = ToRegister(ins->ptr()); + Register valueTemp = ToTempRegisterOrInvalid(ins->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(ins->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(ins->maskTemp()); + + BaseIndex srcAddr(HeapReg, ptrReg, TimesOne, mir->access().offset()); + + masm.wasmAtomicFetchOp(mir->access(), mir->operation(), + ToRegister(ins->value()), srcAddr, valueTemp, + offsetTemp, maskTemp, ToRegister(ins->output())); +} + +void CodeGenerator::visitWasmAtomicBinopHeapForEffect( + LWasmAtomicBinopHeapForEffect* ins) { + MOZ_ASSERT(!ins->mir()->hasUses()); + MOZ_ASSERT(ins->addrTemp()->isBogusTemp()); + + MWasmAtomicBinopHeap* mir = ins->mir(); + Register ptrReg = ToRegister(ins->ptr()); + Register valueTemp = ToTempRegisterOrInvalid(ins->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(ins->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(ins->maskTemp()); + + BaseIndex srcAddr(HeapReg, ptrReg, TimesOne, mir->access().offset()); + masm.wasmAtomicEffectOp(mir->access(), mir->operation(), + ToRegister(ins->value()), srcAddr, valueTemp, + offsetTemp, maskTemp); +} + +void CodeGenerator::visitWasmStackArg(LWasmStackArg* ins) { + const MWasmStackArg* mir = ins->mir(); + if (ins->arg()->isConstant()) { + masm.storePtr(ImmWord(ToInt32(ins->arg())), + Address(StackPointer, mir->spOffset())); + } else { + if (ins->arg()->isGeneralReg()) { + masm.storePtr(ToRegister(ins->arg()), + Address(StackPointer, mir->spOffset())); + } else if (mir->input()->type() == MIRType::Double) { + masm.storeDouble(ToFloatRegister(ins->arg()).doubleOverlay(), + Address(StackPointer, mir->spOffset())); + } else { + masm.storeFloat32(ToFloatRegister(ins->arg()), + Address(StackPointer, mir->spOffset())); + } + } +} + +void CodeGenerator::visitWasmStackArgI64(LWasmStackArgI64* ins) { + const MWasmStackArg* mir = ins->mir(); + Address dst(StackPointer, mir->spOffset()); + if (IsConstant(ins->arg())) { + masm.store64(Imm64(ToInt64(ins->arg())), dst); + } else { + masm.store64(ToRegister64(ins->arg()), dst); + } +} + +void CodeGenerator::visitWasmSelect(LWasmSelect* ins) { + MIRType mirType = ins->mir()->type(); + + Register cond = ToRegister(ins->condExpr()); + const LAllocation* falseExpr = ins->falseExpr(); + + if (mirType == MIRType::Int32 || mirType == MIRType::RefOrNull) { + Register out = ToRegister(ins->output()); + MOZ_ASSERT(ToRegister(ins->trueExpr()) == out, + "true expr input is reused for output"); + if (falseExpr->isRegister()) { + masm.as_movz(out, ToRegister(falseExpr), cond); + } else { + masm.cmp32Load32(Assembler::Zero, cond, cond, ToAddress(falseExpr), out); + } + return; + } + + FloatRegister out = ToFloatRegister(ins->output()); + MOZ_ASSERT(ToFloatRegister(ins->trueExpr()) == out, + "true expr input is reused for output"); + + if (falseExpr->isFloatReg()) { + if (mirType == MIRType::Float32) { + masm.as_movz(Assembler::SingleFloat, out, ToFloatRegister(falseExpr), + cond); + } else if (mirType == MIRType::Double) { + masm.as_movz(Assembler::DoubleFloat, out, ToFloatRegister(falseExpr), + cond); + } else { + MOZ_CRASH("unhandled type in visitWasmSelect!"); + } + } else { + Label done; + masm.ma_b(cond, cond, &done, Assembler::NonZero, ShortJump); + + if (mirType == MIRType::Float32) { + masm.loadFloat32(ToAddress(falseExpr), out); + } else if (mirType == MIRType::Double) { + masm.loadDouble(ToAddress(falseExpr), out); + } else { + MOZ_CRASH("unhandled type in visitWasmSelect!"); + } + + masm.bind(&done); + } +} + +// We expect to handle only the case where compare is {U,}Int32 and select is +// {U,}Int32, and the "true" input is reused for the output. +void CodeGenerator::visitWasmCompareAndSelect(LWasmCompareAndSelect* ins) { + bool cmpIs32bit = ins->compareType() == MCompare::Compare_Int32 || + ins->compareType() == MCompare::Compare_UInt32; + bool selIs32bit = ins->mir()->type() == MIRType::Int32; + + MOZ_RELEASE_ASSERT( + cmpIs32bit && selIs32bit, + "CodeGenerator::visitWasmCompareAndSelect: unexpected types"); + + Register trueExprAndDest = ToRegister(ins->output()); + MOZ_ASSERT(ToRegister(ins->ifTrueExpr()) == trueExprAndDest, + "true expr input is reused for output"); + + Assembler::Condition cond = Assembler::InvertCondition( + JSOpToCondition(ins->compareType(), ins->jsop())); + const LAllocation* rhs = ins->rightExpr(); + const LAllocation* falseExpr = ins->ifFalseExpr(); + Register lhs = ToRegister(ins->leftExpr()); + + masm.cmp32Move32(cond, lhs, ToRegister(rhs), ToRegister(falseExpr), + trueExprAndDest); +} + +void CodeGenerator::visitWasmReinterpret(LWasmReinterpret* lir) { + MOZ_ASSERT(gen->compilingWasm()); + MWasmReinterpret* ins = lir->mir(); + + MIRType to = ins->type(); + DebugOnly<MIRType> from = ins->input()->type(); + + switch (to) { + case MIRType::Int32: + MOZ_ASSERT(from == MIRType::Float32); + masm.as_mfc1(ToRegister(lir->output()), ToFloatRegister(lir->input())); + break; + case MIRType::Float32: + MOZ_ASSERT(from == MIRType::Int32); + masm.as_mtc1(ToRegister(lir->input()), ToFloatRegister(lir->output())); + break; + case MIRType::Double: + case MIRType::Int64: + MOZ_CRASH("not handled by this LIR opcode"); + default: + MOZ_CRASH("unexpected WasmReinterpret"); + } +} + +void CodeGenerator::visitUDivOrMod(LUDivOrMod* ins) { + Register lhs = ToRegister(ins->lhs()); + Register rhs = ToRegister(ins->rhs()); + Register output = ToRegister(ins->output()); + Label done; + + // Prevent divide by zero. + if (ins->canBeDivideByZero()) { + if (ins->mir()->isTruncated()) { + if (ins->trapOnError()) { + Label nonZero; + masm.ma_b(rhs, rhs, &nonZero, Assembler::NonZero); + masm.wasmTrap(wasm::Trap::IntegerDivideByZero, ins->bytecodeOffset()); + masm.bind(&nonZero); + } else { + // Infinity|0 == 0 + Label notzero; + masm.ma_b(rhs, rhs, ¬zero, Assembler::NonZero, ShortJump); + masm.move32(Imm32(0), output); + masm.ma_b(&done, ShortJump); + masm.bind(¬zero); + } + } else { + bailoutCmp32(Assembler::Equal, rhs, Imm32(0), ins->snapshot()); + } + } + +#ifdef MIPSR6 + masm.as_modu(output, lhs, rhs); +#else + masm.as_divu(lhs, rhs); + masm.as_mfhi(output); +#endif + + // If the remainder is > 0, bailout since this must be a double. + if (ins->mir()->isDiv()) { + if (!ins->mir()->toDiv()->canTruncateRemainder()) { + bailoutCmp32(Assembler::NonZero, output, output, ins->snapshot()); + } + // Get quotient +#ifdef MIPSR6 + masm.as_divu(output, lhs, rhs); +#else + masm.as_mflo(output); +#endif + } + + if (!ins->mir()->isTruncated()) { + bailoutCmp32(Assembler::LessThan, output, Imm32(0), ins->snapshot()); + } + + masm.bind(&done); +} + +void CodeGenerator::visitEffectiveAddress(LEffectiveAddress* ins) { + const MEffectiveAddress* mir = ins->mir(); + Register base = ToRegister(ins->base()); + Register index = ToRegister(ins->index()); + Register output = ToRegister(ins->output()); + + BaseIndex address(base, index, mir->scale(), mir->displacement()); + masm.computeEffectiveAddress(address, output); +} + +void CodeGenerator::visitNegI(LNegI* ins) { + Register input = ToRegister(ins->input()); + Register output = ToRegister(ins->output()); + + masm.ma_negu(output, input); +} + +void CodeGenerator::visitNegI64(LNegI64* ins) { + Register64 input = ToRegister64(ins->getInt64Operand(0)); + MOZ_ASSERT(input == ToOutRegister64(ins)); + masm.neg64(input); +} + +void CodeGenerator::visitNegD(LNegD* ins) { + FloatRegister input = ToFloatRegister(ins->input()); + FloatRegister output = ToFloatRegister(ins->output()); + + masm.as_negd(output, input); +} + +void CodeGenerator::visitNegF(LNegF* ins) { + FloatRegister input = ToFloatRegister(ins->input()); + FloatRegister output = ToFloatRegister(ins->output()); + + masm.as_negs(output, input); +} + +void CodeGenerator::visitWasmAddOffset(LWasmAddOffset* lir) { + MWasmAddOffset* mir = lir->mir(); + Register base = ToRegister(lir->base()); + Register out = ToRegister(lir->output()); + + Label ok; + masm.ma_add32TestCarry(Assembler::CarryClear, out, base, Imm32(mir->offset()), + &ok); + masm.wasmTrap(wasm::Trap::OutOfBounds, mir->bytecodeOffset()); + masm.bind(&ok); +} + +void CodeGenerator::visitWasmAddOffset64(LWasmAddOffset64* lir) { + MWasmAddOffset* mir = lir->mir(); + Register64 base = ToRegister64(lir->base()); + Register64 out = ToOutRegister64(lir); + + Label ok; + masm.ma_addPtrTestCarry(Assembler::CarryClear, out.reg, base.reg, + ImmWord(mir->offset()), &ok); + masm.wasmTrap(wasm::Trap::OutOfBounds, mir->bytecodeOffset()); + masm.bind(&ok); +} + +void CodeGenerator::visitAtomicTypedArrayElementBinop( + LAtomicTypedArrayElementBinop* lir) { + MOZ_ASSERT(!lir->mir()->isForEffect()); + + AnyRegister output = ToAnyRegister(lir->output()); + Register elements = ToRegister(lir->elements()); + Register outTemp = ToTempRegisterOrInvalid(lir->temp2()); + Register valueTemp = ToTempRegisterOrInvalid(lir->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(lir->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(lir->maskTemp()); + Register value = ToRegister(lir->value()); + + Scalar::Type arrayType = lir->mir()->arrayType(); + + if (lir->index()->isConstant()) { + Address mem = ToAddress(elements, lir->index(), arrayType); + masm.atomicFetchOpJS(arrayType, Synchronization::Full(), + lir->mir()->operation(), value, mem, valueTemp, + offsetTemp, maskTemp, outTemp, output); + } else { + BaseIndex mem(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.atomicFetchOpJS(arrayType, Synchronization::Full(), + lir->mir()->operation(), value, mem, valueTemp, + offsetTemp, maskTemp, outTemp, output); + } +} + +void CodeGenerator::visitAtomicTypedArrayElementBinopForEffect( + LAtomicTypedArrayElementBinopForEffect* lir) { + MOZ_ASSERT(lir->mir()->isForEffect()); + + Register elements = ToRegister(lir->elements()); + Register valueTemp = ToTempRegisterOrInvalid(lir->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(lir->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(lir->maskTemp()); + Register value = ToRegister(lir->value()); + Scalar::Type arrayType = lir->mir()->arrayType(); + + if (lir->index()->isConstant()) { + Address mem = ToAddress(elements, lir->index(), arrayType); + masm.atomicEffectOpJS(arrayType, Synchronization::Full(), + lir->mir()->operation(), value, mem, valueTemp, + offsetTemp, maskTemp); + } else { + BaseIndex mem(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.atomicEffectOpJS(arrayType, Synchronization::Full(), + lir->mir()->operation(), value, mem, valueTemp, + offsetTemp, maskTemp); + } +} + +void CodeGenerator::visitCompareExchangeTypedArrayElement( + LCompareExchangeTypedArrayElement* lir) { + Register elements = ToRegister(lir->elements()); + AnyRegister output = ToAnyRegister(lir->output()); + Register outTemp = ToTempRegisterOrInvalid(lir->temp()); + + Register oldval = ToRegister(lir->oldval()); + Register newval = ToRegister(lir->newval()); + Register valueTemp = ToTempRegisterOrInvalid(lir->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(lir->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(lir->maskTemp()); + + Scalar::Type arrayType = lir->mir()->arrayType(); + + if (lir->index()->isConstant()) { + Address dest = ToAddress(elements, lir->index(), arrayType); + masm.compareExchangeJS(arrayType, Synchronization::Full(), dest, oldval, + newval, valueTemp, offsetTemp, maskTemp, outTemp, + output); + } else { + BaseIndex dest(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.compareExchangeJS(arrayType, Synchronization::Full(), dest, oldval, + newval, valueTemp, offsetTemp, maskTemp, outTemp, + output); + } +} + +void CodeGenerator::visitAtomicExchangeTypedArrayElement( + LAtomicExchangeTypedArrayElement* lir) { + Register elements = ToRegister(lir->elements()); + AnyRegister output = ToAnyRegister(lir->output()); + Register outTemp = ToTempRegisterOrInvalid(lir->temp()); + + Register value = ToRegister(lir->value()); + Register valueTemp = ToTempRegisterOrInvalid(lir->valueTemp()); + Register offsetTemp = ToTempRegisterOrInvalid(lir->offsetTemp()); + Register maskTemp = ToTempRegisterOrInvalid(lir->maskTemp()); + + Scalar::Type arrayType = lir->mir()->arrayType(); + + if (lir->index()->isConstant()) { + Address dest = ToAddress(elements, lir->index(), arrayType); + masm.atomicExchangeJS(arrayType, Synchronization::Full(), dest, value, + valueTemp, offsetTemp, maskTemp, outTemp, output); + } else { + BaseIndex dest(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.atomicExchangeJS(arrayType, Synchronization::Full(), dest, value, + valueTemp, offsetTemp, maskTemp, outTemp, output); + } +} + +void CodeGenerator::visitCompareExchangeTypedArrayElement64( + LCompareExchangeTypedArrayElement64* lir) { + Register elements = ToRegister(lir->elements()); + Register oldval = ToRegister(lir->oldval()); + Register newval = ToRegister(lir->newval()); + Register64 temp1 = ToRegister64(lir->temp1()); + Register64 temp2 = ToRegister64(lir->temp2()); + Register out = ToRegister(lir->output()); + Register64 tempOut(out); + + Scalar::Type arrayType = lir->mir()->arrayType(); + + masm.loadBigInt64(oldval, temp1); + masm.loadBigInt64(newval, tempOut); + + if (lir->index()->isConstant()) { + Address dest = ToAddress(elements, lir->index(), arrayType); + masm.compareExchange64(Synchronization::Full(), dest, temp1, tempOut, + temp2); + } else { + BaseIndex dest(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.compareExchange64(Synchronization::Full(), dest, temp1, tempOut, + temp2); + } + + emitCreateBigInt(lir, arrayType, temp2, out, temp1.scratchReg()); +} + +void CodeGenerator::visitAtomicExchangeTypedArrayElement64( + LAtomicExchangeTypedArrayElement64* lir) { + Register elements = ToRegister(lir->elements()); + Register value = ToRegister(lir->value()); + Register64 temp1 = ToRegister64(lir->temp1()); + Register64 temp2 = Register64(ToRegister(lir->temp2())); + Register out = ToRegister(lir->output()); + + Scalar::Type arrayType = lir->mir()->arrayType(); + + masm.loadBigInt64(value, temp1); + + if (lir->index()->isConstant()) { + Address dest = ToAddress(elements, lir->index(), arrayType); + masm.atomicExchange64(Synchronization::Full(), dest, temp1, temp2); + } else { + BaseIndex dest(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.atomicExchange64(Synchronization::Full(), dest, temp1, temp2); + } + + emitCreateBigInt(lir, arrayType, temp2, out, temp1.scratchReg()); +} + +void CodeGenerator::visitAtomicTypedArrayElementBinop64( + LAtomicTypedArrayElementBinop64* lir) { + MOZ_ASSERT(lir->mir()->hasUses()); + + Register elements = ToRegister(lir->elements()); + Register value = ToRegister(lir->value()); + Register64 temp1 = ToRegister64(lir->temp1()); + Register64 temp2 = ToRegister64(lir->temp2()); + Register out = ToRegister(lir->output()); + Register64 tempOut = Register64(out); + + Scalar::Type arrayType = lir->mir()->arrayType(); + AtomicOp atomicOp = lir->mir()->operation(); + + masm.loadBigInt64(value, temp1); + + if (lir->index()->isConstant()) { + Address dest = ToAddress(elements, lir->index(), arrayType); + masm.atomicFetchOp64(Synchronization::Full(), atomicOp, temp1, dest, + tempOut, temp2); + } else { + BaseIndex dest(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.atomicFetchOp64(Synchronization::Full(), atomicOp, temp1, dest, + tempOut, temp2); + } + + emitCreateBigInt(lir, arrayType, temp2, out, temp1.scratchReg()); +} + +void CodeGenerator::visitAtomicTypedArrayElementBinopForEffect64( + LAtomicTypedArrayElementBinopForEffect64* lir) { + MOZ_ASSERT(!lir->mir()->hasUses()); + + Register elements = ToRegister(lir->elements()); + Register value = ToRegister(lir->value()); + Register64 temp1 = ToRegister64(lir->temp1()); + Register64 temp2 = ToRegister64(lir->temp2()); + + Scalar::Type arrayType = lir->mir()->arrayType(); + AtomicOp atomicOp = lir->mir()->operation(); + + masm.loadBigInt64(value, temp1); + + if (lir->index()->isConstant()) { + Address dest = ToAddress(elements, lir->index(), arrayType); + masm.atomicEffectOp64(Synchronization::Full(), atomicOp, temp1, dest, + temp2); + } else { + BaseIndex dest(elements, ToRegister(lir->index()), + ScaleFromScalarType(arrayType)); + masm.atomicEffectOp64(Synchronization::Full(), atomicOp, temp1, dest, + temp2); + } +} + +void CodeGenerator::visitWasmCompareExchangeI64(LWasmCompareExchangeI64* lir) { + Register ptr = ToRegister(lir->ptr()); + Register64 oldValue = ToRegister64(lir->oldValue()); + Register64 newValue = ToRegister64(lir->newValue()); + Register64 output = ToOutRegister64(lir); + uint32_t offset = lir->mir()->access().offset(); + + BaseIndex addr(HeapReg, ptr, TimesOne, offset); + masm.wasmCompareExchange64(lir->mir()->access(), addr, oldValue, newValue, + output); +} + +void CodeGenerator::visitWasmAtomicExchangeI64(LWasmAtomicExchangeI64* lir) { + Register ptr = ToRegister(lir->ptr()); + Register64 value = ToRegister64(lir->value()); + Register64 output = ToOutRegister64(lir); + uint32_t offset = lir->mir()->access().offset(); + + BaseIndex addr(HeapReg, ptr, TimesOne, offset); + masm.wasmAtomicExchange64(lir->mir()->access(), addr, value, output); +} + +void CodeGenerator::visitWasmAtomicBinopI64(LWasmAtomicBinopI64* lir) { + Register ptr = ToRegister(lir->ptr()); + Register64 value = ToRegister64(lir->value()); + Register64 output = ToOutRegister64(lir); +#ifdef JS_CODEGEN_MIPS32 + Register64 temp(ToRegister(lir->getTemp(0)), ToRegister(lir->getTemp(1))); +#else + Register64 temp(ToRegister(lir->getTemp(0))); +#endif + uint32_t offset = lir->mir()->access().offset(); + + BaseIndex addr(HeapReg, ptr, TimesOne, offset); + + masm.wasmAtomicFetchOp64(lir->mir()->access(), lir->mir()->operation(), value, + addr, temp, output); +} + +void CodeGenerator::visitNearbyInt(LNearbyInt*) { MOZ_CRASH("NYI"); } + +void CodeGenerator::visitNearbyIntF(LNearbyIntF*) { MOZ_CRASH("NYI"); } + +void CodeGenerator::visitSimd128(LSimd128* ins) { MOZ_CRASH("No SIMD"); } + +void CodeGenerator::visitWasmTernarySimd128(LWasmTernarySimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmBinarySimd128(LWasmBinarySimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmBinarySimd128WithConstant( + LWasmBinarySimd128WithConstant* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmVariableShiftSimd128( + LWasmVariableShiftSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmConstantShiftSimd128( + LWasmConstantShiftSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmSignReplicationSimd128( + LWasmSignReplicationSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmShuffleSimd128(LWasmShuffleSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmPermuteSimd128(LWasmPermuteSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmReplaceLaneSimd128(LWasmReplaceLaneSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmReplaceInt64LaneSimd128( + LWasmReplaceInt64LaneSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmScalarToSimd128(LWasmScalarToSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmInt64ToSimd128(LWasmInt64ToSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmUnarySimd128(LWasmUnarySimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmReduceSimd128(LWasmReduceSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmReduceAndBranchSimd128( + LWasmReduceAndBranchSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmReduceSimd128ToInt64( + LWasmReduceSimd128ToInt64* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmLoadLaneSimd128(LWasmLoadLaneSimd128* ins) { + MOZ_CRASH("No SIMD"); +} + +void CodeGenerator::visitWasmStoreLaneSimd128(LWasmStoreLaneSimd128* ins) { + MOZ_CRASH("No SIMD"); +} diff --git a/js/src/jit/mips-shared/CodeGenerator-mips-shared.h b/js/src/jit/mips-shared/CodeGenerator-mips-shared.h new file mode 100644 index 0000000000..2452a443be --- /dev/null +++ b/js/src/jit/mips-shared/CodeGenerator-mips-shared.h @@ -0,0 +1,157 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_CodeGenerator_mips_shared_h +#define jit_mips_shared_CodeGenerator_mips_shared_h + +#include "jit/shared/CodeGenerator-shared.h" + +namespace js { +namespace jit { + +class CodeGeneratorMIPSShared; +class OutOfLineBailout; +class OutOfLineTableSwitch; + +using OutOfLineWasmTruncateCheck = + OutOfLineWasmTruncateCheckBase<CodeGeneratorMIPSShared>; + +class CodeGeneratorMIPSShared : public CodeGeneratorShared { + friend class MoveResolverMIPS; + + protected: + CodeGeneratorMIPSShared(MIRGenerator* gen, LIRGraph* graph, + MacroAssembler* masm); + + NonAssertingLabel deoptLabel_; + + Operand ToOperand(const LAllocation& a); + Operand ToOperand(const LAllocation* a); + Operand ToOperand(const LDefinition* def); + +#ifdef JS_PUNBOX64 + Operand ToOperandOrRegister64(const LInt64Allocation input); +#else + Register64 ToOperandOrRegister64(const LInt64Allocation input); +#endif + + MoveOperand toMoveOperand(LAllocation a) const; + + template <typename T1, typename T2> + void bailoutCmp32(Assembler::Condition c, T1 lhs, T2 rhs, + LSnapshot* snapshot) { + Label bail; + masm.branch32(c, lhs, rhs, &bail); + bailoutFrom(&bail, snapshot); + } + template <typename T1, typename T2> + void bailoutTest32(Assembler::Condition c, T1 lhs, T2 rhs, + LSnapshot* snapshot) { + Label bail; + masm.branchTest32(c, lhs, rhs, &bail); + bailoutFrom(&bail, snapshot); + } + template <typename T1, typename T2> + void bailoutCmpPtr(Assembler::Condition c, T1 lhs, T2 rhs, + LSnapshot* snapshot) { + Label bail; + masm.branchPtr(c, lhs, rhs, &bail); + bailoutFrom(&bail, snapshot); + } + void bailoutTestPtr(Assembler::Condition c, Register lhs, Register rhs, + LSnapshot* snapshot) { + Label bail; + masm.branchTestPtr(c, lhs, rhs, &bail); + bailoutFrom(&bail, snapshot); + } + void bailoutIfFalseBool(Register reg, LSnapshot* snapshot) { + Label bail; + masm.branchTest32(Assembler::Zero, reg, Imm32(0xFF), &bail); + bailoutFrom(&bail, snapshot); + } + + void bailoutFrom(Label* label, LSnapshot* snapshot); + void bailout(LSnapshot* snapshot); + + bool generateOutOfLineCode(); + + template <typename T> + void branchToBlock(Register lhs, T rhs, MBasicBlock* mir, + Assembler::Condition cond) { + masm.ma_b(lhs, rhs, skipTrivialBlocks(mir)->lir()->label(), cond); + } + void branchToBlock(Assembler::FloatFormat fmt, FloatRegister lhs, + FloatRegister rhs, MBasicBlock* mir, + Assembler::DoubleCondition cond); + + // Emits a branch that directs control flow to the true block if |cond| is + // true, and the false block if |cond| is false. + template <typename T> + void emitBranch(Register lhs, T rhs, Assembler::Condition cond, + MBasicBlock* mirTrue, MBasicBlock* mirFalse) { + if (isNextBlock(mirFalse->lir())) { + branchToBlock(lhs, rhs, mirTrue, cond); + } else { + branchToBlock(lhs, rhs, mirFalse, Assembler::InvertCondition(cond)); + jumpToBlock(mirTrue); + } + } + void testZeroEmitBranch(Assembler::Condition cond, Register reg, + MBasicBlock* ifTrue, MBasicBlock* ifFalse) { + emitBranch(reg, Imm32(0), cond, ifTrue, ifFalse); + } + + void emitTableSwitchDispatch(MTableSwitch* mir, Register index, + Register base); + + template <typename T> + void emitWasmLoad(T* ins); + template <typename T> + void emitWasmStore(T* ins); + + void generateInvalidateEpilogue(); + + // Generating a result. + template <typename S, typename T> + void atomicBinopToTypedIntArray(AtomicOp op, Scalar::Type arrayType, + const S& value, const T& mem, + Register flagTemp, Register outTemp, + Register valueTemp, Register offsetTemp, + Register maskTemp, AnyRegister output); + + // Generating no result. + template <typename S, typename T> + void atomicBinopToTypedIntArray(AtomicOp op, Scalar::Type arrayType, + const S& value, const T& mem, + Register flagTemp, Register valueTemp, + Register offsetTemp, Register maskTemp); + + public: + // Out of line visitors. + void visitOutOfLineBailout(OutOfLineBailout* ool); + void visitOutOfLineTableSwitch(OutOfLineTableSwitch* ool); + void visitOutOfLineWasmTruncateCheck(OutOfLineWasmTruncateCheck* ool); +}; + +// An out-of-line bailout thunk. +class OutOfLineBailout : public OutOfLineCodeBase<CodeGeneratorMIPSShared> { + protected: + LSnapshot* snapshot_; + uint32_t frameSize_; + + public: + OutOfLineBailout(LSnapshot* snapshot, uint32_t frameSize) + : snapshot_(snapshot), frameSize_(frameSize) {} + + void accept(CodeGeneratorMIPSShared* codegen) override; + + LSnapshot* snapshot() const { return snapshot_; } +}; + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_CodeGenerator_mips_shared_h */ diff --git a/js/src/jit/mips-shared/LIR-mips-shared.h b/js/src/jit/mips-shared/LIR-mips-shared.h new file mode 100644 index 0000000000..624e9eb6a7 --- /dev/null +++ b/js/src/jit/mips-shared/LIR-mips-shared.h @@ -0,0 +1,360 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_LIR_mips_shared_h +#define jit_mips_shared_LIR_mips_shared_h + +namespace js { +namespace jit { + +// Convert a 32-bit unsigned integer to a double. +class LWasmUint32ToDouble : public LInstructionHelper<1, 1, 0> { + public: + LIR_HEADER(WasmUint32ToDouble) + + LWasmUint32ToDouble(const LAllocation& input) + : LInstructionHelper(classOpcode) { + setOperand(0, input); + } +}; + +// Convert a 32-bit unsigned integer to a float32. +class LWasmUint32ToFloat32 : public LInstructionHelper<1, 1, 0> { + public: + LIR_HEADER(WasmUint32ToFloat32) + + LWasmUint32ToFloat32(const LAllocation& input) + : LInstructionHelper(classOpcode) { + setOperand(0, input); + } +}; + +class LDivI : public LBinaryMath<1> { + public: + LIR_HEADER(DivI); + + LDivI(const LAllocation& lhs, const LAllocation& rhs, const LDefinition& temp) + : LBinaryMath(classOpcode) { + setOperand(0, lhs); + setOperand(1, rhs); + setTemp(0, temp); + } + + MDiv* mir() const { return mir_->toDiv(); } +}; + +class LDivPowTwoI : public LInstructionHelper<1, 1, 1> { + const int32_t shift_; + + public: + LIR_HEADER(DivPowTwoI) + + LDivPowTwoI(const LAllocation& lhs, int32_t shift, const LDefinition& temp) + : LInstructionHelper(classOpcode), shift_(shift) { + setOperand(0, lhs); + setTemp(0, temp); + } + + const LAllocation* numerator() { return getOperand(0); } + int32_t shift() const { return shift_; } + MDiv* mir() const { return mir_->toDiv(); } +}; + +class LModI : public LBinaryMath<1> { + public: + LIR_HEADER(ModI); + + LModI(const LAllocation& lhs, const LAllocation& rhs, + const LDefinition& callTemp) + : LBinaryMath(classOpcode) { + setOperand(0, lhs); + setOperand(1, rhs); + setTemp(0, callTemp); + } + + const LDefinition* callTemp() { return getTemp(0); } + MMod* mir() const { return mir_->toMod(); } +}; + +class LModPowTwoI : public LInstructionHelper<1, 1, 0> { + const int32_t shift_; + + public: + LIR_HEADER(ModPowTwoI); + + LModPowTwoI(const LAllocation& lhs, int32_t shift) + : LInstructionHelper(classOpcode), shift_(shift) { + setOperand(0, lhs); + } + + int32_t shift() const { return shift_; } + MMod* mir() const { return mir_->toMod(); } +}; + +class LModMaskI : public LInstructionHelper<1, 1, 2> { + const int32_t shift_; + + public: + LIR_HEADER(ModMaskI); + + LModMaskI(const LAllocation& lhs, const LDefinition& temp0, + const LDefinition& temp1, int32_t shift) + : LInstructionHelper(classOpcode), shift_(shift) { + setOperand(0, lhs); + setTemp(0, temp0); + setTemp(1, temp1); + } + + int32_t shift() const { return shift_; } + MMod* mir() const { return mir_->toMod(); } +}; + +// Takes a tableswitch with an integer to decide +class LTableSwitch : public LInstructionHelper<0, 1, 2> { + public: + LIR_HEADER(TableSwitch); + + LTableSwitch(const LAllocation& in, const LDefinition& inputCopy, + const LDefinition& jumpTablePointer, MTableSwitch* ins) + : LInstructionHelper(classOpcode) { + setOperand(0, in); + setTemp(0, inputCopy); + setTemp(1, jumpTablePointer); + setMir(ins); + } + + MTableSwitch* mir() const { return mir_->toTableSwitch(); } + const LAllocation* index() { return getOperand(0); } + const LDefinition* tempInt() { return getTemp(0); } + // This is added to share the same CodeGenerator prefixes. + const LDefinition* tempPointer() { return getTemp(1); } +}; + +// Takes a tableswitch with an integer to decide +class LTableSwitchV : public LInstructionHelper<0, BOX_PIECES, 3> { + public: + LIR_HEADER(TableSwitchV); + + LTableSwitchV(const LBoxAllocation& input, const LDefinition& inputCopy, + const LDefinition& floatCopy, + const LDefinition& jumpTablePointer, MTableSwitch* ins) + : LInstructionHelper(classOpcode) { + setBoxOperand(InputValue, input); + setTemp(0, inputCopy); + setTemp(1, floatCopy); + setTemp(2, jumpTablePointer); + setMir(ins); + } + + MTableSwitch* mir() const { return mir_->toTableSwitch(); } + + static const size_t InputValue = 0; + + const LDefinition* tempInt() { return getTemp(0); } + const LDefinition* tempFloat() { return getTemp(1); } + const LDefinition* tempPointer() { return getTemp(2); } +}; + +class LMulI : public LBinaryMath<0> { + public: + LIR_HEADER(MulI); + + LMulI() : LBinaryMath(classOpcode) {} + + MMul* mir() { return mir_->toMul(); } +}; + +class LUDivOrMod : public LBinaryMath<0> { + public: + LIR_HEADER(UDivOrMod); + + LUDivOrMod() : LBinaryMath(classOpcode) {} + + MBinaryArithInstruction* mir() const { + MOZ_ASSERT(mir_->isDiv() || mir_->isMod()); + return static_cast<MBinaryArithInstruction*>(mir_); + } + + bool canBeDivideByZero() const { + if (mir_->isMod()) { + return mir_->toMod()->canBeDivideByZero(); + } + return mir_->toDiv()->canBeDivideByZero(); + } + + bool trapOnError() const { + if (mir_->isMod()) { + return mir_->toMod()->trapOnError(); + } + return mir_->toDiv()->trapOnError(); + } + + wasm::BytecodeOffset bytecodeOffset() const { + MOZ_ASSERT(mir_->isDiv() || mir_->isMod()); + if (mir_->isMod()) { + return mir_->toMod()->bytecodeOffset(); + } + return mir_->toDiv()->bytecodeOffset(); + } +}; + +namespace details { + +// Base class for the int64 and non-int64 variants. +template <size_t NumDefs> +class LWasmUnalignedLoadBase : public details::LWasmLoadBase<NumDefs, 2> { + public: + typedef LWasmLoadBase<NumDefs, 2> Base; + + explicit LWasmUnalignedLoadBase(LNode::Opcode opcode, const LAllocation& ptr, + const LDefinition& valueHelper) + : Base(opcode, ptr, LAllocation()) { + Base::setTemp(0, LDefinition::BogusTemp()); + Base::setTemp(1, valueHelper); + } + + const LAllocation* ptr() { return Base::getOperand(0); } + const LDefinition* ptrCopy() { return Base::getTemp(0); } +}; + +} // namespace details + +class LWasmUnalignedLoad : public details::LWasmUnalignedLoadBase<1> { + public: + LIR_HEADER(WasmUnalignedLoad); + + explicit LWasmUnalignedLoad(const LAllocation& ptr, + const LDefinition& valueHelper) + : LWasmUnalignedLoadBase(classOpcode, ptr, valueHelper) {} +}; + +class LWasmUnalignedLoadI64 + : public details::LWasmUnalignedLoadBase<INT64_PIECES> { + public: + LIR_HEADER(WasmUnalignedLoadI64); + + explicit LWasmUnalignedLoadI64(const LAllocation& ptr, + const LDefinition& valueHelper) + : LWasmUnalignedLoadBase(classOpcode, ptr, valueHelper) {} +}; + +namespace details { + +// Base class for the int64 and non-int64 variants. +template <size_t NumOps> +class LWasmUnalignedStoreBase : public LInstructionHelper<0, NumOps, 2> { + public: + typedef LInstructionHelper<0, NumOps, 2> Base; + + static const size_t PtrIndex = 0; + static const size_t ValueIndex = 1; + + LWasmUnalignedStoreBase(LNode::Opcode opcode, const LAllocation& ptr, + const LDefinition& valueHelper) + : Base(opcode) { + Base::setOperand(0, ptr); + Base::setTemp(0, LDefinition::BogusTemp()); + Base::setTemp(1, valueHelper); + } + + MWasmStore* mir() const { return Base::mir_->toWasmStore(); } + const LAllocation* ptr() { return Base::getOperand(PtrIndex); } + const LDefinition* ptrCopy() { return Base::getTemp(0); } +}; + +} // namespace details + +class LWasmUnalignedStore : public details::LWasmUnalignedStoreBase<2> { + public: + LIR_HEADER(WasmUnalignedStore); + + LWasmUnalignedStore(const LAllocation& ptr, const LAllocation& value, + const LDefinition& valueHelper) + : LWasmUnalignedStoreBase(classOpcode, ptr, valueHelper) { + setOperand(1, value); + } + + const LAllocation* value() { return Base::getOperand(ValueIndex); } +}; + +class LWasmUnalignedStoreI64 + : public details::LWasmUnalignedStoreBase<1 + INT64_PIECES> { + public: + LIR_HEADER(WasmUnalignedStoreI64); + LWasmUnalignedStoreI64(const LAllocation& ptr, const LInt64Allocation& value, + const LDefinition& valueHelper) + : LWasmUnalignedStoreBase(classOpcode, ptr, valueHelper) { + setInt64Operand(1, value); + } + + const LInt64Allocation value() { return getInt64Operand(ValueIndex); } +}; + +class LWasmCompareExchangeI64 + : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES + INT64_PIECES, + 0> { + public: + LIR_HEADER(WasmCompareExchangeI64); + + LWasmCompareExchangeI64(const LAllocation& ptr, + const LInt64Allocation& oldValue, + const LInt64Allocation& newValue) + : LInstructionHelper(classOpcode) { + setOperand(0, ptr); + setInt64Operand(1, oldValue); + setInt64Operand(1 + INT64_PIECES, newValue); + } + + const LAllocation* ptr() { return getOperand(0); } + const LInt64Allocation oldValue() { return getInt64Operand(1); } + const LInt64Allocation newValue() { + return getInt64Operand(1 + INT64_PIECES); + } + const MWasmCompareExchangeHeap* mir() const { + return mir_->toWasmCompareExchangeHeap(); + } +}; + +class LWasmAtomicExchangeI64 + : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES, 0> { + public: + LIR_HEADER(WasmAtomicExchangeI64); + + LWasmAtomicExchangeI64(const LAllocation& ptr, const LInt64Allocation& value) + : LInstructionHelper(classOpcode) { + setOperand(0, ptr); + setInt64Operand(1, value); + } + + const LAllocation* ptr() { return getOperand(0); } + const LInt64Allocation value() { return getInt64Operand(1); } + const MWasmAtomicExchangeHeap* mir() const { + return mir_->toWasmAtomicExchangeHeap(); + } +}; + +class LWasmAtomicBinopI64 + : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES, 2> { + public: + LIR_HEADER(WasmAtomicBinopI64); + + LWasmAtomicBinopI64(const LAllocation& ptr, const LInt64Allocation& value) + : LInstructionHelper(classOpcode) { + setOperand(0, ptr); + setInt64Operand(1, value); + } + + const LAllocation* ptr() { return getOperand(0); } + const LInt64Allocation value() { return getInt64Operand(1); } + const MWasmAtomicBinopHeap* mir() const { + return mir_->toWasmAtomicBinopHeap(); + } +}; + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_LIR_mips_shared_h */ diff --git a/js/src/jit/mips-shared/Lowering-mips-shared.cpp b/js/src/jit/mips-shared/Lowering-mips-shared.cpp new file mode 100644 index 0000000000..ea9e0ba3dd --- /dev/null +++ b/js/src/jit/mips-shared/Lowering-mips-shared.cpp @@ -0,0 +1,1023 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/mips-shared/Lowering-mips-shared.h" + +#include "mozilla/MathAlgorithms.h" + +#include "jit/Lowering.h" +#include "jit/MIR.h" + +#include "jit/shared/Lowering-shared-inl.h" + +using namespace js; +using namespace js::jit; + +using mozilla::FloorLog2; + +LAllocation LIRGeneratorMIPSShared::useByteOpRegister(MDefinition* mir) { + return useRegister(mir); +} + +LAllocation LIRGeneratorMIPSShared::useByteOpRegisterAtStart(MDefinition* mir) { + return useRegisterAtStart(mir); +} + +LAllocation LIRGeneratorMIPSShared::useByteOpRegisterOrNonDoubleConstant( + MDefinition* mir) { + return useRegisterOrNonDoubleConstant(mir); +} + +LDefinition LIRGeneratorMIPSShared::tempByteOpRegister() { return temp(); } + +// x = !y +void LIRGeneratorMIPSShared::lowerForALU(LInstructionHelper<1, 1, 0>* ins, + MDefinition* mir, MDefinition* input) { + ins->setOperand(0, useRegister(input)); + define( + ins, mir, + LDefinition(LDefinition::TypeFrom(mir->type()), LDefinition::REGISTER)); +} + +// z = x+y +void LIRGeneratorMIPSShared::lowerForALU(LInstructionHelper<1, 2, 0>* ins, + MDefinition* mir, MDefinition* lhs, + MDefinition* rhs) { + ins->setOperand(0, useRegister(lhs)); + ins->setOperand(1, useRegisterOrConstant(rhs)); + define( + ins, mir, + LDefinition(LDefinition::TypeFrom(mir->type()), LDefinition::REGISTER)); +} + +void LIRGeneratorMIPSShared::lowerForALUInt64( + LInstructionHelper<INT64_PIECES, INT64_PIECES, 0>* ins, MDefinition* mir, + MDefinition* input) { + ins->setInt64Operand(0, useInt64RegisterAtStart(input)); + defineInt64ReuseInput(ins, mir, 0); +} + +void LIRGeneratorMIPSShared::lowerForALUInt64( + LInstructionHelper<INT64_PIECES, 2 * INT64_PIECES, 0>* ins, + MDefinition* mir, MDefinition* lhs, MDefinition* rhs) { + ins->setInt64Operand(0, useInt64RegisterAtStart(lhs)); + ins->setInt64Operand(INT64_PIECES, willHaveDifferentLIRNodes(lhs, rhs) + ? useInt64OrConstant(rhs) + : useInt64OrConstantAtStart(rhs)); + defineInt64ReuseInput(ins, mir, 0); +} + +void LIRGeneratorMIPSShared::lowerForMulInt64(LMulI64* ins, MMul* mir, + MDefinition* lhs, + MDefinition* rhs) { + bool needsTemp = false; + bool cannotAliasRhs = false; + bool reuseInput = true; + +#ifdef JS_CODEGEN_MIPS32 + needsTemp = true; + cannotAliasRhs = true; + // See the documentation on willHaveDifferentLIRNodes; that test does not + // allow additional constraints. + MOZ_CRASH( + "cannotAliasRhs cannot be used the way it is used in the guard below"); + if (rhs->isConstant()) { + int64_t constant = rhs->toConstant()->toInt64(); + int32_t shift = mozilla::FloorLog2(constant); + // See special cases in CodeGeneratorMIPSShared::visitMulI64 + if (constant >= -1 && constant <= 2) { + needsTemp = false; + } + if (int64_t(1) << shift == constant) { + needsTemp = false; + } + if (mozilla::IsPowerOfTwo(static_cast<uint32_t>(constant + 1)) || + mozilla::IsPowerOfTwo(static_cast<uint32_t>(constant - 1))) + reuseInput = false; + } +#endif + ins->setInt64Operand(0, useInt64RegisterAtStart(lhs)); + ins->setInt64Operand(INT64_PIECES, + (willHaveDifferentLIRNodes(lhs, rhs) || cannotAliasRhs) + ? useInt64OrConstant(rhs) + : useInt64OrConstantAtStart(rhs)); + + if (needsTemp) { + ins->setTemp(0, temp()); + } + if (reuseInput) { + defineInt64ReuseInput(ins, mir, 0); + } else { + defineInt64(ins, mir); + } +} + +template <size_t Temps> +void LIRGeneratorMIPSShared::lowerForShiftInt64( + LInstructionHelper<INT64_PIECES, INT64_PIECES + 1, Temps>* ins, + MDefinition* mir, MDefinition* lhs, MDefinition* rhs) { +#ifdef JS_CODEGEN_MIPS32 + if (mir->isRotate()) { + if (!rhs->isConstant()) { + ins->setTemp(0, temp()); + } + ins->setInt64Operand(0, useInt64Register(lhs)); + } else { + ins->setInt64Operand(0, useInt64RegisterAtStart(lhs)); + } +#else + ins->setInt64Operand(0, useInt64RegisterAtStart(lhs)); +#endif + + static_assert(LShiftI64::Rhs == INT64_PIECES, + "Assume Rhs is located at INT64_PIECES."); + static_assert(LRotateI64::Count == INT64_PIECES, + "Assume Count is located at INT64_PIECES."); + + ins->setOperand(INT64_PIECES, useRegisterOrConstant(rhs)); + +#ifdef JS_CODEGEN_MIPS32 + if (mir->isRotate()) { + defineInt64(ins, mir); + } else { + defineInt64ReuseInput(ins, mir, 0); + } +#else + defineInt64ReuseInput(ins, mir, 0); +#endif +} + +template void LIRGeneratorMIPSShared::lowerForShiftInt64( + LInstructionHelper<INT64_PIECES, INT64_PIECES + 1, 0>* ins, + MDefinition* mir, MDefinition* lhs, MDefinition* rhs); +template void LIRGeneratorMIPSShared::lowerForShiftInt64( + LInstructionHelper<INT64_PIECES, INT64_PIECES + 1, 1>* ins, + MDefinition* mir, MDefinition* lhs, MDefinition* rhs); + +void LIRGeneratorMIPSShared::lowerForCompareI64AndBranch( + MTest* mir, MCompare* comp, JSOp op, MDefinition* left, MDefinition* right, + MBasicBlock* ifTrue, MBasicBlock* ifFalse) { + LCompareI64AndBranch* lir = new (alloc()) + LCompareI64AndBranch(comp, op, useInt64Register(left), + useInt64OrConstant(right), ifTrue, ifFalse); + add(lir, mir); +} + +void LIRGeneratorMIPSShared::lowerForFPU(LInstructionHelper<1, 1, 0>* ins, + MDefinition* mir, MDefinition* input) { + ins->setOperand(0, useRegister(input)); + define( + ins, mir, + LDefinition(LDefinition::TypeFrom(mir->type()), LDefinition::REGISTER)); +} + +template <size_t Temps> +void LIRGeneratorMIPSShared::lowerForFPU(LInstructionHelper<1, 2, Temps>* ins, + MDefinition* mir, MDefinition* lhs, + MDefinition* rhs) { + ins->setOperand(0, useRegister(lhs)); + ins->setOperand(1, useRegister(rhs)); + define( + ins, mir, + LDefinition(LDefinition::TypeFrom(mir->type()), LDefinition::REGISTER)); +} + +template void LIRGeneratorMIPSShared::lowerForFPU( + LInstructionHelper<1, 2, 0>* ins, MDefinition* mir, MDefinition* lhs, + MDefinition* rhs); +template void LIRGeneratorMIPSShared::lowerForFPU( + LInstructionHelper<1, 2, 1>* ins, MDefinition* mir, MDefinition* lhs, + MDefinition* rhs); + +void LIRGeneratorMIPSShared::lowerForBitAndAndBranch(LBitAndAndBranch* baab, + MInstruction* mir, + MDefinition* lhs, + MDefinition* rhs) { + baab->setOperand(0, useRegisterAtStart(lhs)); + baab->setOperand(1, useRegisterOrConstantAtStart(rhs)); + add(baab, mir); +} + +void LIRGeneratorMIPSShared::lowerWasmBuiltinTruncateToInt32( + MWasmBuiltinTruncateToInt32* ins) { + MDefinition* opd = ins->input(); + MOZ_ASSERT(opd->type() == MIRType::Double || opd->type() == MIRType::Float32); + + if (opd->type() == MIRType::Double) { + define(new (alloc()) LWasmBuiltinTruncateDToInt32( + useRegister(opd), useFixed(ins->instance(), InstanceReg), + LDefinition::BogusTemp()), + ins); + return; + } + + define(new (alloc()) LWasmBuiltinTruncateFToInt32( + useRegister(opd), useFixed(ins->instance(), InstanceReg), + LDefinition::BogusTemp()), + ins); +} + +void LIRGeneratorMIPSShared::lowerForShift(LInstructionHelper<1, 2, 0>* ins, + MDefinition* mir, MDefinition* lhs, + MDefinition* rhs) { + ins->setOperand(0, useRegister(lhs)); + ins->setOperand(1, useRegisterOrConstant(rhs)); + define(ins, mir); +} + +void LIRGeneratorMIPSShared::lowerDivI(MDiv* div) { + if (div->isUnsigned()) { + lowerUDiv(div); + return; + } + + // Division instructions are slow. Division by constant denominators can be + // rewritten to use other instructions. + if (div->rhs()->isConstant()) { + int32_t rhs = div->rhs()->toConstant()->toInt32(); + // Check for division by a positive power of two, which is an easy and + // important case to optimize. Note that other optimizations are also + // possible; division by negative powers of two can be optimized in a + // similar manner as positive powers of two, and division by other + // constants can be optimized by a reciprocal multiplication technique. + int32_t shift = FloorLog2(rhs); + if (rhs > 0 && 1 << shift == rhs) { + LDivPowTwoI* lir = + new (alloc()) LDivPowTwoI(useRegister(div->lhs()), shift, temp()); + if (div->fallible()) { + assignSnapshot(lir, div->bailoutKind()); + } + define(lir, div); + return; + } + } + + LDivI* lir = new (alloc()) + LDivI(useRegister(div->lhs()), useRegister(div->rhs()), temp()); + if (div->fallible()) { + assignSnapshot(lir, div->bailoutKind()); + } + define(lir, div); +} + +void LIRGeneratorMIPSShared::lowerNegI(MInstruction* ins, MDefinition* input) { + define(new (alloc()) LNegI(useRegisterAtStart(input)), ins); +} + +void LIRGeneratorMIPSShared::lowerNegI64(MInstruction* ins, + MDefinition* input) { + defineInt64ReuseInput(new (alloc()) LNegI64(useInt64RegisterAtStart(input)), + ins, 0); +} + +void LIRGenerator::visitAbs(MAbs* ins) { + define(allocateAbs(ins, useRegisterAtStart(ins->input())), ins); +} + +void LIRGeneratorMIPSShared::lowerMulI(MMul* mul, MDefinition* lhs, + MDefinition* rhs) { + LMulI* lir = new (alloc()) LMulI; + if (mul->fallible()) { + assignSnapshot(lir, mul->bailoutKind()); + } + + lowerForALU(lir, mul, lhs, rhs); +} + +void LIRGeneratorMIPSShared::lowerModI(MMod* mod) { + if (mod->isUnsigned()) { + lowerUMod(mod); + return; + } + + if (mod->rhs()->isConstant()) { + int32_t rhs = mod->rhs()->toConstant()->toInt32(); + int32_t shift = FloorLog2(rhs); + if (rhs > 0 && 1 << shift == rhs) { + LModPowTwoI* lir = + new (alloc()) LModPowTwoI(useRegister(mod->lhs()), shift); + if (mod->fallible()) { + assignSnapshot(lir, mod->bailoutKind()); + } + define(lir, mod); + return; + } else if (shift < 31 && (1 << (shift + 1)) - 1 == rhs) { + LModMaskI* lir = new (alloc()) + LModMaskI(useRegister(mod->lhs()), temp(LDefinition::GENERAL), + temp(LDefinition::GENERAL), shift + 1); + if (mod->fallible()) { + assignSnapshot(lir, mod->bailoutKind()); + } + define(lir, mod); + return; + } + } + LModI* lir = + new (alloc()) LModI(useRegister(mod->lhs()), useRegister(mod->rhs()), + temp(LDefinition::GENERAL)); + + if (mod->fallible()) { + assignSnapshot(lir, mod->bailoutKind()); + } + define(lir, mod); +} + +void LIRGenerator::visitPowHalf(MPowHalf* ins) { + MDefinition* input = ins->input(); + MOZ_ASSERT(input->type() == MIRType::Double); + LPowHalfD* lir = new (alloc()) LPowHalfD(useRegisterAtStart(input)); + defineReuseInput(lir, ins, 0); +} + +void LIRGeneratorMIPSShared::lowerWasmSelectI(MWasmSelect* select) { + auto* lir = new (alloc()) + LWasmSelect(useRegisterAtStart(select->trueExpr()), + useAny(select->falseExpr()), useRegister(select->condExpr())); + defineReuseInput(lir, select, LWasmSelect::TrueExprIndex); +} + +void LIRGeneratorMIPSShared::lowerWasmSelectI64(MWasmSelect* select) { + auto* lir = new (alloc()) LWasmSelectI64( + useInt64RegisterAtStart(select->trueExpr()), + useInt64(select->falseExpr()), useRegister(select->condExpr())); + defineInt64ReuseInput(lir, select, LWasmSelectI64::TrueExprIndex); +} + +LTableSwitch* LIRGeneratorMIPSShared::newLTableSwitch( + const LAllocation& in, const LDefinition& inputCopy, + MTableSwitch* tableswitch) { + return new (alloc()) LTableSwitch(in, inputCopy, temp(), tableswitch); +} + +LTableSwitchV* LIRGeneratorMIPSShared::newLTableSwitchV( + MTableSwitch* tableswitch) { + return new (alloc()) LTableSwitchV(useBox(tableswitch->getOperand(0)), temp(), + tempDouble(), temp(), tableswitch); +} + +void LIRGeneratorMIPSShared::lowerUrshD(MUrsh* mir) { + MDefinition* lhs = mir->lhs(); + MDefinition* rhs = mir->rhs(); + + MOZ_ASSERT(lhs->type() == MIRType::Int32); + MOZ_ASSERT(rhs->type() == MIRType::Int32); + + LUrshD* lir = new (alloc()) + LUrshD(useRegister(lhs), useRegisterOrConstant(rhs), temp()); + define(lir, mir); +} + +void LIRGeneratorMIPSShared::lowerPowOfTwoI(MPow* mir) { + int32_t base = mir->input()->toConstant()->toInt32(); + MDefinition* power = mir->power(); + + auto* lir = new (alloc()) LPowOfTwoI(useRegister(power), base); + assignSnapshot(lir, mir->bailoutKind()); + define(lir, mir); +} + +void LIRGeneratorMIPSShared::lowerBigIntLsh(MBigIntLsh* ins) { + auto* lir = new (alloc()) LBigIntLsh( + useRegister(ins->lhs()), useRegister(ins->rhs()), temp(), temp(), temp()); + define(lir, ins); + assignSafepoint(lir, ins); +} + +void LIRGeneratorMIPSShared::lowerBigIntRsh(MBigIntRsh* ins) { + auto* lir = new (alloc()) LBigIntRsh( + useRegister(ins->lhs()), useRegister(ins->rhs()), temp(), temp(), temp()); + define(lir, ins); + assignSafepoint(lir, ins); +} + +void LIRGenerator::visitWasmNeg(MWasmNeg* ins) { + if (ins->type() == MIRType::Int32) { + define(new (alloc()) LNegI(useRegisterAtStart(ins->input())), ins); + } else if (ins->type() == MIRType::Float32) { + define(new (alloc()) LNegF(useRegisterAtStart(ins->input())), ins); + } else { + MOZ_ASSERT(ins->type() == MIRType::Double); + define(new (alloc()) LNegD(useRegisterAtStart(ins->input())), ins); + } +} + +void LIRGenerator::visitWasmHeapBase(MWasmHeapBase* ins) { + auto* lir = new (alloc()) LWasmHeapBase(LAllocation()); + define(lir, ins); +} + +void LIRGenerator::visitWasmLoad(MWasmLoad* ins) { + MDefinition* base = ins->base(); + // 'base' is a GPR but may be of either type. If it is 32-bit, it is + // sign-extended on mips64 platform and we should explicitly promote it to + // 64-bit when use it as an index register in memory accesses. + MOZ_ASSERT(base->type() == MIRType::Int32 || base->type() == MIRType::Int64); + + LAllocation ptr; +#ifdef JS_CODEGEN_MIPS32 + if (ins->type() == MIRType::Int64) { + ptr = useRegister(base); + } else { + ptr = useRegisterAtStart(base); + } +#else + ptr = useRegisterAtStart(base); +#endif + + if (IsUnaligned(ins->access())) { + if (ins->type() == MIRType::Int64) { + auto* lir = new (alloc()) LWasmUnalignedLoadI64(ptr, temp()); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + defineInt64(lir, ins); + return; + } + + auto* lir = new (alloc()) LWasmUnalignedLoad(ptr, temp()); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + define(lir, ins); + return; + } + + if (ins->type() == MIRType::Int64) { +#ifdef JS_CODEGEN_MIPS32 + if (ins->access().isAtomic()) { + auto* lir = new (alloc()) LWasmAtomicLoadI64(ptr); + defineInt64(lir, ins); + return; + } +#endif + auto* lir = new (alloc()) LWasmLoadI64(ptr); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + defineInt64(lir, ins); + return; + } + + auto* lir = new (alloc()) LWasmLoad(ptr); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + define(lir, ins); +} + +void LIRGenerator::visitWasmStore(MWasmStore* ins) { + MDefinition* base = ins->base(); + // See comment in visitWasmLoad re the type of 'base'. + MOZ_ASSERT(base->type() == MIRType::Int32 || base->type() == MIRType::Int64); + + MDefinition* value = ins->value(); + + if (IsUnaligned(ins->access())) { + LAllocation baseAlloc = useRegisterAtStart(base); + if (ins->access().type() == Scalar::Int64) { + LInt64Allocation valueAlloc = useInt64RegisterAtStart(value); + auto* lir = + new (alloc()) LWasmUnalignedStoreI64(baseAlloc, valueAlloc, temp()); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + add(lir, ins); + return; + } + + LAllocation valueAlloc = useRegisterAtStart(value); + auto* lir = + new (alloc()) LWasmUnalignedStore(baseAlloc, valueAlloc, temp()); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + add(lir, ins); + return; + } + + if (ins->access().type() == Scalar::Int64) { +#ifdef JS_CODEGEN_MIPS32 + if (ins->access().isAtomic()) { + auto* lir = new (alloc()) LWasmAtomicStoreI64( + useRegister(base), useInt64Register(value), temp()); + add(lir, ins); + return; + } +#endif + + LAllocation baseAlloc = useRegisterAtStart(base); + LInt64Allocation valueAlloc = useInt64RegisterAtStart(value); + auto* lir = new (alloc()) LWasmStoreI64(baseAlloc, valueAlloc); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + add(lir, ins); + return; + } + + LAllocation baseAlloc = useRegisterAtStart(base); + LAllocation valueAlloc = useRegisterAtStart(value); + auto* lir = new (alloc()) LWasmStore(baseAlloc, valueAlloc); + if (ins->access().offset()) { + lir->setTemp(0, tempCopy(base, 0)); + } + + add(lir, ins); +} + +void LIRGeneratorMIPSShared::lowerUDiv(MDiv* div) { + MDefinition* lhs = div->getOperand(0); + MDefinition* rhs = div->getOperand(1); + + LUDivOrMod* lir = new (alloc()) LUDivOrMod; + lir->setOperand(0, useRegister(lhs)); + lir->setOperand(1, useRegister(rhs)); + if (div->fallible()) { + assignSnapshot(lir, div->bailoutKind()); + } + + define(lir, div); +} + +void LIRGeneratorMIPSShared::lowerUMod(MMod* mod) { + MDefinition* lhs = mod->getOperand(0); + MDefinition* rhs = mod->getOperand(1); + + LUDivOrMod* lir = new (alloc()) LUDivOrMod; + lir->setOperand(0, useRegister(lhs)); + lir->setOperand(1, useRegister(rhs)); + if (mod->fallible()) { + assignSnapshot(lir, mod->bailoutKind()); + } + + define(lir, mod); +} + +void LIRGenerator::visitWasmUnsignedToDouble(MWasmUnsignedToDouble* ins) { + MOZ_ASSERT(ins->input()->type() == MIRType::Int32); + LWasmUint32ToDouble* lir = + new (alloc()) LWasmUint32ToDouble(useRegisterAtStart(ins->input())); + define(lir, ins); +} + +void LIRGenerator::visitWasmUnsignedToFloat32(MWasmUnsignedToFloat32* ins) { + MOZ_ASSERT(ins->input()->type() == MIRType::Int32); + LWasmUint32ToFloat32* lir = + new (alloc()) LWasmUint32ToFloat32(useRegisterAtStart(ins->input())); + define(lir, ins); +} + +void LIRGenerator::visitAsmJSLoadHeap(MAsmJSLoadHeap* ins) { + MOZ_ASSERT(ins->access().offset() == 0); + + MDefinition* base = ins->base(); + MOZ_ASSERT(base->type() == MIRType::Int32); + LAllocation baseAlloc; + LAllocation limitAlloc; + // For MIPS it is best to keep the 'base' in a register if a bounds check + // is needed. + if (base->isConstant() && !ins->needsBoundsCheck()) { + // A bounds check is only skipped for a positive index. + MOZ_ASSERT(base->toConstant()->toInt32() >= 0); + baseAlloc = LAllocation(base->toConstant()); + } else { + baseAlloc = useRegisterAtStart(base); + if (ins->needsBoundsCheck()) { + MDefinition* boundsCheckLimit = ins->boundsCheckLimit(); + MOZ_ASSERT(boundsCheckLimit->type() == MIRType::Int32); + limitAlloc = useRegisterAtStart(boundsCheckLimit); + } + } + + define(new (alloc()) LAsmJSLoadHeap(baseAlloc, limitAlloc, LAllocation()), + ins); +} + +void LIRGenerator::visitAsmJSStoreHeap(MAsmJSStoreHeap* ins) { + MOZ_ASSERT(ins->access().offset() == 0); + + MDefinition* base = ins->base(); + MOZ_ASSERT(base->type() == MIRType::Int32); + LAllocation baseAlloc; + LAllocation limitAlloc; + if (base->isConstant() && !ins->needsBoundsCheck()) { + MOZ_ASSERT(base->toConstant()->toInt32() >= 0); + baseAlloc = LAllocation(base->toConstant()); + } else { + baseAlloc = useRegisterAtStart(base); + if (ins->needsBoundsCheck()) { + MDefinition* boundsCheckLimit = ins->boundsCheckLimit(); + MOZ_ASSERT(boundsCheckLimit->type() == MIRType::Int32); + limitAlloc = useRegisterAtStart(boundsCheckLimit); + } + } + + add(new (alloc()) LAsmJSStoreHeap(baseAlloc, useRegisterAtStart(ins->value()), + limitAlloc, LAllocation()), + ins); +} + +void LIRGenerator::visitSubstr(MSubstr* ins) { + LSubstr* lir = new (alloc()) + LSubstr(useRegister(ins->string()), useRegister(ins->begin()), + useRegister(ins->length()), temp(), temp(), tempByteOpRegister()); + define(lir, ins); + assignSafepoint(lir, ins); +} + +void LIRGenerator::visitCompareExchangeTypedArrayElement( + MCompareExchangeTypedArrayElement* ins) { + MOZ_ASSERT(ins->arrayType() != Scalar::Float32); + MOZ_ASSERT(ins->arrayType() != Scalar::Float64); + + MOZ_ASSERT(ins->elements()->type() == MIRType::Elements); + MOZ_ASSERT(ins->index()->type() == MIRType::IntPtr); + + const LUse elements = useRegister(ins->elements()); + const LAllocation index = + useRegisterOrIndexConstant(ins->index(), ins->arrayType()); + + const LAllocation newval = useRegister(ins->newval()); + const LAllocation oldval = useRegister(ins->oldval()); + + if (Scalar::isBigIntType(ins->arrayType())) { + LInt64Definition temp1 = tempInt64(); + LInt64Definition temp2 = tempInt64(); + + auto* lir = new (alloc()) LCompareExchangeTypedArrayElement64( + elements, index, oldval, newval, temp1, temp2); + define(lir, ins); + assignSafepoint(lir, ins); + return; + } + + // If the target is a floating register then we need a temp at the + // CodeGenerator level for creating the result. + + LDefinition outTemp = LDefinition::BogusTemp(); + LDefinition valueTemp = LDefinition::BogusTemp(); + LDefinition offsetTemp = LDefinition::BogusTemp(); + LDefinition maskTemp = LDefinition::BogusTemp(); + + if (ins->arrayType() == Scalar::Uint32 && IsFloatingPointType(ins->type())) { + outTemp = temp(); + } + + if (Scalar::byteSize(ins->arrayType()) < 4) { + valueTemp = temp(); + offsetTemp = temp(); + maskTemp = temp(); + } + + LCompareExchangeTypedArrayElement* lir = new (alloc()) + LCompareExchangeTypedArrayElement(elements, index, oldval, newval, + outTemp, valueTemp, offsetTemp, + maskTemp); + + define(lir, ins); +} + +void LIRGenerator::visitAtomicExchangeTypedArrayElement( + MAtomicExchangeTypedArrayElement* ins) { + MOZ_ASSERT(ins->elements()->type() == MIRType::Elements); + MOZ_ASSERT(ins->index()->type() == MIRType::IntPtr); + + const LUse elements = useRegister(ins->elements()); + const LAllocation index = + useRegisterOrIndexConstant(ins->index(), ins->arrayType()); + + const LAllocation value = useRegister(ins->value()); + + if (Scalar::isBigIntType(ins->arrayType())) { + LInt64Definition temp1 = tempInt64(); + LDefinition temp2 = temp(); + + auto* lir = new (alloc()) LAtomicExchangeTypedArrayElement64( + elements, index, value, temp1, temp2); + define(lir, ins); + assignSafepoint(lir, ins); + return; + } + + // If the target is a floating register then we need a temp at the + // CodeGenerator level for creating the result. + + MOZ_ASSERT(ins->arrayType() <= Scalar::Uint32); + + LDefinition outTemp = LDefinition::BogusTemp(); + LDefinition valueTemp = LDefinition::BogusTemp(); + LDefinition offsetTemp = LDefinition::BogusTemp(); + LDefinition maskTemp = LDefinition::BogusTemp(); + + if (ins->arrayType() == Scalar::Uint32) { + MOZ_ASSERT(ins->type() == MIRType::Double); + outTemp = temp(); + } + + if (Scalar::byteSize(ins->arrayType()) < 4) { + valueTemp = temp(); + offsetTemp = temp(); + maskTemp = temp(); + } + + LAtomicExchangeTypedArrayElement* lir = + new (alloc()) LAtomicExchangeTypedArrayElement( + elements, index, value, outTemp, valueTemp, offsetTemp, maskTemp); + + define(lir, ins); +} + +void LIRGenerator::visitWasmCompareExchangeHeap(MWasmCompareExchangeHeap* ins) { + MDefinition* base = ins->base(); + // See comment in visitWasmLoad re the type of 'base'. + MOZ_ASSERT(base->type() == MIRType::Int32 || base->type() == MIRType::Int64); + + if (ins->access().type() == Scalar::Int64) { + auto* lir = new (alloc()) LWasmCompareExchangeI64( + useRegister(base), useInt64Register(ins->oldValue()), + useInt64Register(ins->newValue())); + defineInt64(lir, ins); + return; + } + + LDefinition valueTemp = LDefinition::BogusTemp(); + LDefinition offsetTemp = LDefinition::BogusTemp(); + LDefinition maskTemp = LDefinition::BogusTemp(); + + if (ins->access().byteSize() < 4) { + valueTemp = temp(); + offsetTemp = temp(); + maskTemp = temp(); + } + + LWasmCompareExchangeHeap* lir = new (alloc()) LWasmCompareExchangeHeap( + useRegister(base), useRegister(ins->oldValue()), + useRegister(ins->newValue()), valueTemp, offsetTemp, maskTemp); + + define(lir, ins); +} + +void LIRGenerator::visitWasmAtomicExchangeHeap(MWasmAtomicExchangeHeap* ins) { + MDefinition* base = ins->base(); + // See comment in visitWasmLoad re the type of 'base'. + MOZ_ASSERT(base->type() == MIRType::Int32 || base->type() == MIRType::Int64); + + if (ins->access().type() == Scalar::Int64) { + auto* lir = new (alloc()) LWasmAtomicExchangeI64( + useRegister(base), useInt64Register(ins->value())); + defineInt64(lir, ins); + return; + } + + LDefinition valueTemp = LDefinition::BogusTemp(); + LDefinition offsetTemp = LDefinition::BogusTemp(); + LDefinition maskTemp = LDefinition::BogusTemp(); + + if (ins->access().byteSize() < 4) { + valueTemp = temp(); + offsetTemp = temp(); + maskTemp = temp(); + } + + LWasmAtomicExchangeHeap* lir = new (alloc()) + LWasmAtomicExchangeHeap(useRegister(base), useRegister(ins->value()), + valueTemp, offsetTemp, maskTemp); + define(lir, ins); +} + +void LIRGenerator::visitWasmAtomicBinopHeap(MWasmAtomicBinopHeap* ins) { + MDefinition* base = ins->base(); + // See comment in visitWasmLoad re the type of 'base'. + MOZ_ASSERT(base->type() == MIRType::Int32 || base->type() == MIRType::Int64); + + if (ins->access().type() == Scalar::Int64) { + auto* lir = new (alloc()) + LWasmAtomicBinopI64(useRegister(base), useInt64Register(ins->value())); + lir->setTemp(0, temp()); +#ifdef JS_CODEGEN_MIPS32 + lir->setTemp(1, temp()); +#endif + defineInt64(lir, ins); + return; + } + + LDefinition valueTemp = LDefinition::BogusTemp(); + LDefinition offsetTemp = LDefinition::BogusTemp(); + LDefinition maskTemp = LDefinition::BogusTemp(); + + if (ins->access().byteSize() < 4) { + valueTemp = temp(); + offsetTemp = temp(); + maskTemp = temp(); + } + + if (!ins->hasUses()) { + LWasmAtomicBinopHeapForEffect* lir = new (alloc()) + LWasmAtomicBinopHeapForEffect(useRegister(base), + useRegister(ins->value()), valueTemp, + offsetTemp, maskTemp); + add(lir, ins); + return; + } + + LWasmAtomicBinopHeap* lir = new (alloc()) + LWasmAtomicBinopHeap(useRegister(base), useRegister(ins->value()), + valueTemp, offsetTemp, maskTemp); + + define(lir, ins); +} + +void LIRGenerator::visitAtomicTypedArrayElementBinop( + MAtomicTypedArrayElementBinop* ins) { + MOZ_ASSERT(ins->arrayType() != Scalar::Uint8Clamped); + MOZ_ASSERT(ins->arrayType() != Scalar::Float32); + MOZ_ASSERT(ins->arrayType() != Scalar::Float64); + + MOZ_ASSERT(ins->elements()->type() == MIRType::Elements); + MOZ_ASSERT(ins->index()->type() == MIRType::IntPtr); + + const LUse elements = useRegister(ins->elements()); + const LAllocation index = + useRegisterOrIndexConstant(ins->index(), ins->arrayType()); + const LAllocation value = useRegister(ins->value()); + + if (Scalar::isBigIntType(ins->arrayType())) { + LInt64Definition temp1 = tempInt64(); + LInt64Definition temp2 = tempInt64(); + + // Case 1: the result of the operation is not used. + // + // We can omit allocating the result BigInt. + + if (ins->isForEffect()) { + auto* lir = new (alloc()) LAtomicTypedArrayElementBinopForEffect64( + elements, index, value, temp1, temp2); + add(lir, ins); + return; + } + + // Case 2: the result of the operation is used. + + auto* lir = new (alloc()) + LAtomicTypedArrayElementBinop64(elements, index, value, temp1, temp2); + define(lir, ins); + assignSafepoint(lir, ins); + return; + } + + LDefinition valueTemp = LDefinition::BogusTemp(); + LDefinition offsetTemp = LDefinition::BogusTemp(); + LDefinition maskTemp = LDefinition::BogusTemp(); + + if (Scalar::byteSize(ins->arrayType()) < 4) { + valueTemp = temp(); + offsetTemp = temp(); + maskTemp = temp(); + } + + if (ins->isForEffect()) { + LAtomicTypedArrayElementBinopForEffect* lir = + new (alloc()) LAtomicTypedArrayElementBinopForEffect( + elements, index, value, valueTemp, offsetTemp, maskTemp); + add(lir, ins); + return; + } + + // For a Uint32Array with a known double result we need a temp for + // the intermediate output. + + LDefinition outTemp = LDefinition::BogusTemp(); + + if (ins->arrayType() == Scalar::Uint32 && IsFloatingPointType(ins->type())) { + outTemp = temp(); + } + + LAtomicTypedArrayElementBinop* lir = + new (alloc()) LAtomicTypedArrayElementBinop( + elements, index, value, outTemp, valueTemp, offsetTemp, maskTemp); + define(lir, ins); +} + +void LIRGenerator::visitCopySign(MCopySign* ins) { + MDefinition* lhs = ins->lhs(); + MDefinition* rhs = ins->rhs(); + + MOZ_ASSERT(IsFloatingPointType(lhs->type())); + MOZ_ASSERT(lhs->type() == rhs->type()); + MOZ_ASSERT(lhs->type() == ins->type()); + + LInstructionHelper<1, 2, 2>* lir; + if (lhs->type() == MIRType::Double) { + lir = new (alloc()) LCopySignD(); + } else { + lir = new (alloc()) LCopySignF(); + } + + lir->setTemp(0, temp()); + lir->setTemp(1, temp()); + + lir->setOperand(0, useRegisterAtStart(lhs)); + lir->setOperand(1, useRegister(rhs)); + defineReuseInput(lir, ins, 0); +} + +void LIRGenerator::visitExtendInt32ToInt64(MExtendInt32ToInt64* ins) { + defineInt64( + new (alloc()) LExtendInt32ToInt64(useRegisterAtStart(ins->input())), ins); +} + +void LIRGenerator::visitSignExtendInt64(MSignExtendInt64* ins) { + defineInt64(new (alloc()) + LSignExtendInt64(useInt64RegisterAtStart(ins->input())), + ins); +} + +// On mips we specialize the only cases where compare is {U,}Int32 and select +// is {U,}Int32. +bool LIRGeneratorShared::canSpecializeWasmCompareAndSelect( + MCompare::CompareType compTy, MIRType insTy) { + return insTy == MIRType::Int32 && (compTy == MCompare::Compare_Int32 || + compTy == MCompare::Compare_UInt32); +} + +void LIRGeneratorShared::lowerWasmCompareAndSelect(MWasmSelect* ins, + MDefinition* lhs, + MDefinition* rhs, + MCompare::CompareType compTy, + JSOp jsop) { + MOZ_ASSERT(canSpecializeWasmCompareAndSelect(compTy, ins->type())); + auto* lir = new (alloc()) LWasmCompareAndSelect( + useRegister(lhs), useRegister(rhs), compTy, jsop, + useRegisterAtStart(ins->trueExpr()), useRegister(ins->falseExpr())); + defineReuseInput(lir, ins, LWasmCompareAndSelect::IfTrueExprIndex); +} + +void LIRGenerator::visitWasmTernarySimd128(MWasmTernarySimd128* ins) { + MOZ_CRASH("ternary SIMD NYI"); +} + +void LIRGenerator::visitWasmBinarySimd128(MWasmBinarySimd128* ins) { + MOZ_CRASH("binary SIMD NYI"); +} + +#ifdef ENABLE_WASM_SIMD +bool MWasmTernarySimd128::specializeBitselectConstantMaskAsShuffle( + int8_t shuffle[16]) { + return false; +} +bool MWasmTernarySimd128::canRelaxBitselect() { return false; } + +bool MWasmBinarySimd128::canPmaddubsw() { return false; } +#endif + +bool MWasmBinarySimd128::specializeForConstantRhs() { + // Probably many we want to do here + return false; +} + +void LIRGenerator::visitWasmBinarySimd128WithConstant( + MWasmBinarySimd128WithConstant* ins) { + MOZ_CRASH("binary SIMD with constant NYI"); +} + +void LIRGenerator::visitWasmShiftSimd128(MWasmShiftSimd128* ins) { + MOZ_CRASH("shift SIMD NYI"); +} + +void LIRGenerator::visitWasmShuffleSimd128(MWasmShuffleSimd128* ins) { + MOZ_CRASH("shuffle SIMD NYI"); +} + +void LIRGenerator::visitWasmReplaceLaneSimd128(MWasmReplaceLaneSimd128* ins) { + MOZ_CRASH("replace-lane SIMD NYI"); +} + +void LIRGenerator::visitWasmScalarToSimd128(MWasmScalarToSimd128* ins) { + MOZ_CRASH("scalar-to-SIMD NYI"); +} + +void LIRGenerator::visitWasmUnarySimd128(MWasmUnarySimd128* ins) { + MOZ_CRASH("unary SIMD NYI"); +} + +void LIRGenerator::visitWasmReduceSimd128(MWasmReduceSimd128* ins) { + MOZ_CRASH("reduce-SIMD NYI"); +} + +void LIRGenerator::visitWasmLoadLaneSimd128(MWasmLoadLaneSimd128* ins) { + MOZ_CRASH("load-lane SIMD NYI"); +} + +void LIRGenerator::visitWasmStoreLaneSimd128(MWasmStoreLaneSimd128* ins) { + MOZ_CRASH("store-lane SIMD NYI"); +} diff --git a/js/src/jit/mips-shared/Lowering-mips-shared.h b/js/src/jit/mips-shared/Lowering-mips-shared.h new file mode 100644 index 0000000000..ca74a7aaf5 --- /dev/null +++ b/js/src/jit/mips-shared/Lowering-mips-shared.h @@ -0,0 +1,89 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_Lowering_mips_shared_h +#define jit_mips_shared_Lowering_mips_shared_h + +#include "jit/shared/Lowering-shared.h" + +namespace js { +namespace jit { + +class LIRGeneratorMIPSShared : public LIRGeneratorShared { + protected: + LIRGeneratorMIPSShared(MIRGenerator* gen, MIRGraph& graph, LIRGraph& lirGraph) + : LIRGeneratorShared(gen, graph, lirGraph) {} + + // x86 has constraints on what registers can be formatted for 1-byte + // stores and loads; on MIPS all registers are okay. + LAllocation useByteOpRegister(MDefinition* mir); + LAllocation useByteOpRegisterAtStart(MDefinition* mir); + LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition* mir); + LDefinition tempByteOpRegister(); + + bool needTempForPostBarrier() { return false; } + + void lowerForShift(LInstructionHelper<1, 2, 0>* ins, MDefinition* mir, + MDefinition* lhs, MDefinition* rhs); + void lowerUrshD(MUrsh* mir); + + void lowerPowOfTwoI(MPow* mir); + + void lowerForALU(LInstructionHelper<1, 1, 0>* ins, MDefinition* mir, + MDefinition* input); + void lowerForALU(LInstructionHelper<1, 2, 0>* ins, MDefinition* mir, + MDefinition* lhs, MDefinition* rhs); + + void lowerForALUInt64(LInstructionHelper<INT64_PIECES, INT64_PIECES, 0>* ins, + MDefinition* mir, MDefinition* input); + void lowerForALUInt64( + LInstructionHelper<INT64_PIECES, 2 * INT64_PIECES, 0>* ins, + MDefinition* mir, MDefinition* lhs, MDefinition* rhs); + void lowerForMulInt64(LMulI64* ins, MMul* mir, MDefinition* lhs, + MDefinition* rhs); + template <size_t Temps> + void lowerForShiftInt64( + LInstructionHelper<INT64_PIECES, INT64_PIECES + 1, Temps>* ins, + MDefinition* mir, MDefinition* lhs, MDefinition* rhs); + + void lowerForCompareI64AndBranch(MTest* mir, MCompare* comp, JSOp op, + MDefinition* left, MDefinition* right, + MBasicBlock* ifTrue, MBasicBlock* ifFalse); + + void lowerForFPU(LInstructionHelper<1, 1, 0>* ins, MDefinition* mir, + MDefinition* src); + template <size_t Temps> + void lowerForFPU(LInstructionHelper<1, 2, Temps>* ins, MDefinition* mir, + MDefinition* lhs, MDefinition* rhs); + + void lowerForBitAndAndBranch(LBitAndAndBranch* baab, MInstruction* mir, + MDefinition* lhs, MDefinition* rhs); + void lowerWasmBuiltinTruncateToInt32(MWasmBuiltinTruncateToInt32* ins); + void lowerDivI(MDiv* div); + void lowerModI(MMod* mod); + void lowerNegI(MInstruction* ins, MDefinition* input); + void lowerNegI64(MInstruction* ins, MDefinition* input); + void lowerMulI(MMul* mul, MDefinition* lhs, MDefinition* rhs); + void lowerUDiv(MDiv* div); + void lowerUMod(MMod* mod); + void lowerWasmSelectI(MWasmSelect* select); + void lowerWasmSelectI64(MWasmSelect* select); + + void lowerBigIntLsh(MBigIntLsh* ins); + void lowerBigIntRsh(MBigIntRsh* ins); + + LTableSwitch* newLTableSwitch(const LAllocation& in, + const LDefinition& inputCopy, + MTableSwitch* ins); + LTableSwitchV* newLTableSwitchV(MTableSwitch* ins); + + void lowerPhi(MPhi* phi); +}; + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_Lowering_mips_shared_h */ diff --git a/js/src/jit/mips-shared/MacroAssembler-mips-shared-inl.h b/js/src/jit/mips-shared/MacroAssembler-mips-shared-inl.h new file mode 100644 index 0000000000..69c914f584 --- /dev/null +++ b/js/src/jit/mips-shared/MacroAssembler-mips-shared-inl.h @@ -0,0 +1,1312 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_MacroAssembler_mips_shared_inl_h +#define jit_mips_shared_MacroAssembler_mips_shared_inl_h + +#include "jit/mips-shared/MacroAssembler-mips-shared.h" + +namespace js { +namespace jit { + +//{{{ check_macroassembler_style + +void MacroAssembler::moveFloat32ToGPR(FloatRegister src, Register dest) { + moveFromFloat32(src, dest); +} + +void MacroAssembler::moveGPRToFloat32(Register src, FloatRegister dest) { + moveToFloat32(src, dest); +} + +void MacroAssembler::move8SignExtend(Register src, Register dest) { + ma_seb(dest, src); +} + +void MacroAssembler::move16SignExtend(Register src, Register dest) { + ma_seh(dest, src); +} + +void MacroAssembler::loadAbiReturnAddress(Register dest) { movePtr(ra, dest); } + +// =============================================================== +// Logical instructions + +void MacroAssembler::not32(Register reg) { ma_not(reg, reg); } + +void MacroAssembler::and32(Register src, Register dest) { + as_and(dest, dest, src); +} + +void MacroAssembler::and32(Imm32 imm, Register dest) { ma_and(dest, imm); } + +void MacroAssembler::and32(Imm32 imm, const Address& dest) { + load32(dest, SecondScratchReg); + ma_and(SecondScratchReg, imm); + store32(SecondScratchReg, dest); +} + +void MacroAssembler::and32(const Address& src, Register dest) { + load32(src, SecondScratchReg); + ma_and(dest, SecondScratchReg); +} + +void MacroAssembler::or32(Register src, Register dest) { ma_or(dest, src); } + +void MacroAssembler::or32(Imm32 imm, Register dest) { ma_or(dest, imm); } + +void MacroAssembler::or32(Imm32 imm, const Address& dest) { + load32(dest, SecondScratchReg); + ma_or(SecondScratchReg, imm); + store32(SecondScratchReg, dest); +} + +void MacroAssembler::xor32(Register src, Register dest) { ma_xor(dest, src); } + +void MacroAssembler::xor32(Imm32 imm, Register dest) { ma_xor(dest, imm); } + +void MacroAssembler::xor32(Imm32 imm, const Address& dest) { + load32(dest, SecondScratchReg); + ma_xor(SecondScratchReg, imm); + store32(SecondScratchReg, dest); +} + +void MacroAssembler::xor32(const Address& src, Register dest) { + load32(src, SecondScratchReg); + ma_xor(dest, SecondScratchReg); +} + +// =============================================================== +// Swap instructions + +void MacroAssembler::byteSwap16SignExtend(Register reg) { + ma_wsbh(reg, reg); + ma_seh(reg, reg); +} + +void MacroAssembler::byteSwap16ZeroExtend(Register reg) { + ma_wsbh(reg, reg); + ma_and(reg, Imm32(0xFFFF)); +} + +void MacroAssembler::byteSwap32(Register reg) { + ma_wsbh(reg, reg); + as_rotr(reg, reg, 16); +} + +// =============================================================== +// Arithmetic instructions + +void MacroAssembler::add32(Register src, Register dest) { + as_addu(dest, dest, src); +} + +void MacroAssembler::add32(Imm32 imm, Register dest) { + ma_addu(dest, dest, imm); +} + +void MacroAssembler::add32(Imm32 imm, const Address& dest) { + load32(dest, SecondScratchReg); + ma_addu(SecondScratchReg, imm); + store32(SecondScratchReg, dest); +} + +void MacroAssembler::addPtr(Imm32 imm, const Address& dest) { + loadPtr(dest, ScratchRegister); + addPtr(imm, ScratchRegister); + storePtr(ScratchRegister, dest); +} + +void MacroAssembler::addPtr(const Address& src, Register dest) { + loadPtr(src, ScratchRegister); + addPtr(ScratchRegister, dest); +} + +void MacroAssembler::addDouble(FloatRegister src, FloatRegister dest) { + as_addd(dest, dest, src); +} + +void MacroAssembler::addFloat32(FloatRegister src, FloatRegister dest) { + as_adds(dest, dest, src); +} + +void MacroAssembler::sub32(Register src, Register dest) { + as_subu(dest, dest, src); +} + +void MacroAssembler::sub32(Imm32 imm, Register dest) { + ma_subu(dest, dest, imm); +} + +void MacroAssembler::sub32(const Address& src, Register dest) { + load32(src, SecondScratchReg); + as_subu(dest, dest, SecondScratchReg); +} + +void MacroAssembler::subPtr(Register src, const Address& dest) { + loadPtr(dest, SecondScratchReg); + subPtr(src, SecondScratchReg); + storePtr(SecondScratchReg, dest); +} + +void MacroAssembler::subPtr(const Address& addr, Register dest) { + loadPtr(addr, SecondScratchReg); + subPtr(SecondScratchReg, dest); +} + +void MacroAssembler::subDouble(FloatRegister src, FloatRegister dest) { + as_subd(dest, dest, src); +} + +void MacroAssembler::subFloat32(FloatRegister src, FloatRegister dest) { + as_subs(dest, dest, src); +} + +void MacroAssembler::mul32(Register rhs, Register srcDest) { + as_mul(srcDest, srcDest, rhs); +} + +void MacroAssembler::mul32(Imm32 imm, Register srcDest) { + move32(imm, SecondScratchReg); + mul32(SecondScratchReg, srcDest); +} + +void MacroAssembler::mulFloat32(FloatRegister src, FloatRegister dest) { + as_muls(dest, dest, src); +} + +void MacroAssembler::mulDouble(FloatRegister src, FloatRegister dest) { + as_muld(dest, dest, src); +} + +void MacroAssembler::mulDoublePtr(ImmPtr imm, Register temp, + FloatRegister dest) { + movePtr(imm, ScratchRegister); + loadDouble(Address(ScratchRegister, 0), ScratchDoubleReg); + mulDouble(ScratchDoubleReg, dest); +} + +void MacroAssembler::quotient32(Register rhs, Register srcDest, + bool isUnsigned) { + if (isUnsigned) { +#ifdef MIPSR6 + as_divu(srcDest, srcDest, rhs); +#else + as_divu(srcDest, rhs); +#endif + } else { +#ifdef MIPSR6 + as_div(srcDest, srcDest, rhs); +#else + as_div(srcDest, rhs); +#endif + } +#ifndef MIPSR6 + as_mflo(srcDest); +#endif +} + +void MacroAssembler::remainder32(Register rhs, Register srcDest, + bool isUnsigned) { + if (isUnsigned) { +#ifdef MIPSR6 + as_modu(srcDest, srcDest, rhs); +#else + as_divu(srcDest, rhs); +#endif + } else { +#ifdef MIPSR6 + as_mod(srcDest, srcDest, rhs); +#else + as_div(srcDest, rhs); +#endif + } +#ifndef MIPSR6 + as_mfhi(srcDest); +#endif +} + +void MacroAssembler::divFloat32(FloatRegister src, FloatRegister dest) { + as_divs(dest, dest, src); +} + +void MacroAssembler::divDouble(FloatRegister src, FloatRegister dest) { + as_divd(dest, dest, src); +} + +void MacroAssembler::neg32(Register reg) { ma_negu(reg, reg); } + +void MacroAssembler::negateDouble(FloatRegister reg) { as_negd(reg, reg); } + +void MacroAssembler::negateFloat(FloatRegister reg) { as_negs(reg, reg); } + +void MacroAssembler::abs32(Register src, Register dest) { + // TODO: There's probably a better way to do this. + if (src != dest) { + move32(src, dest); + } + Label positive; + branchTest32(Assembler::NotSigned, dest, dest, &positive); + neg32(dest); + bind(&positive); +} + +void MacroAssembler::absFloat32(FloatRegister src, FloatRegister dest) { + as_abss(dest, src); +} + +void MacroAssembler::absDouble(FloatRegister src, FloatRegister dest) { + as_absd(dest, src); +} + +void MacroAssembler::sqrtFloat32(FloatRegister src, FloatRegister dest) { + as_sqrts(dest, src); +} + +void MacroAssembler::sqrtDouble(FloatRegister src, FloatRegister dest) { + as_sqrtd(dest, src); +} + +void MacroAssembler::minFloat32(FloatRegister other, FloatRegister srcDest, + bool handleNaN) { + minMaxFloat32(srcDest, other, handleNaN, false); +} + +void MacroAssembler::minDouble(FloatRegister other, FloatRegister srcDest, + bool handleNaN) { + minMaxDouble(srcDest, other, handleNaN, false); +} + +void MacroAssembler::maxFloat32(FloatRegister other, FloatRegister srcDest, + bool handleNaN) { + minMaxFloat32(srcDest, other, handleNaN, true); +} + +void MacroAssembler::maxDouble(FloatRegister other, FloatRegister srcDest, + bool handleNaN) { + minMaxDouble(srcDest, other, handleNaN, true); +} + +// =============================================================== +// Shift functions + +void MacroAssembler::lshift32(Register src, Register dest) { + ma_sll(dest, dest, src); +} + +void MacroAssembler::flexibleLshift32(Register src, Register dest) { + lshift32(src, dest); +} + +void MacroAssembler::lshift32(Imm32 imm, Register dest) { + ma_sll(dest, dest, imm); +} + +void MacroAssembler::rshift32(Register src, Register dest) { + ma_srl(dest, dest, src); +} + +void MacroAssembler::flexibleRshift32(Register src, Register dest) { + rshift32(src, dest); +} + +void MacroAssembler::rshift32(Imm32 imm, Register dest) { + ma_srl(dest, dest, imm); +} + +void MacroAssembler::rshift32Arithmetic(Register src, Register dest) { + ma_sra(dest, dest, src); +} + +void MacroAssembler::flexibleRshift32Arithmetic(Register src, Register dest) { + rshift32Arithmetic(src, dest); +} + +void MacroAssembler::rshift32Arithmetic(Imm32 imm, Register dest) { + ma_sra(dest, dest, imm); +} + +// =============================================================== +// Rotation functions +void MacroAssembler::rotateLeft(Imm32 count, Register input, Register dest) { + if (count.value) { + ma_rol(dest, input, count); + } else { + ma_move(dest, input); + } +} +void MacroAssembler::rotateLeft(Register count, Register input, Register dest) { + ma_rol(dest, input, count); +} +void MacroAssembler::rotateRight(Imm32 count, Register input, Register dest) { + if (count.value) { + ma_ror(dest, input, count); + } else { + ma_move(dest, input); + } +} +void MacroAssembler::rotateRight(Register count, Register input, + Register dest) { + ma_ror(dest, input, count); +} + +// =============================================================== +// Bit counting functions + +void MacroAssembler::clz32(Register src, Register dest, bool knownNotZero) { + as_clz(dest, src); +} + +void MacroAssembler::ctz32(Register src, Register dest, bool knownNotZero) { + ma_ctz(dest, src); +} + +void MacroAssembler::popcnt32(Register input, Register output, Register tmp) { + // Equivalent to GCC output of mozilla::CountPopulation32() + ma_move(output, input); + ma_sra(tmp, input, Imm32(1)); + ma_and(tmp, Imm32(0x55555555)); + ma_subu(output, tmp); + ma_sra(tmp, output, Imm32(2)); + ma_and(output, Imm32(0x33333333)); + ma_and(tmp, Imm32(0x33333333)); + ma_addu(output, tmp); + ma_srl(tmp, output, Imm32(4)); + ma_addu(output, tmp); + ma_and(output, Imm32(0xF0F0F0F)); + ma_sll(tmp, output, Imm32(8)); + ma_addu(output, tmp); + ma_sll(tmp, output, Imm32(16)); + ma_addu(output, tmp); + ma_sra(output, output, Imm32(24)); +} + +// =============================================================== +// Condition functions + +void MacroAssembler::cmp8Set(Condition cond, Address lhs, Imm32 rhs, + Register dest) { + SecondScratchRegisterScope scratch2(*this); + MOZ_ASSERT(scratch2 != lhs.base); + + switch (cond) { + case Assembler::Equal: + case Assembler::NotEqual: + case Assembler::Above: + case Assembler::AboveOrEqual: + case Assembler::Below: + case Assembler::BelowOrEqual: + load8ZeroExtend(lhs, scratch2); + ma_cmp_set(dest, scratch2, Imm32(uint8_t(rhs.value)), cond); + break; + + case Assembler::GreaterThan: + case Assembler::GreaterThanOrEqual: + case Assembler::LessThan: + case Assembler::LessThanOrEqual: + load8SignExtend(lhs, scratch2); + ma_cmp_set(dest, scratch2, Imm32(int8_t(rhs.value)), cond); + break; + + default: + MOZ_CRASH("unexpected condition"); + } +} + +void MacroAssembler::cmp16Set(Condition cond, Address lhs, Imm32 rhs, + Register dest) { + SecondScratchRegisterScope scratch2(*this); + MOZ_ASSERT(scratch2 != lhs.base); + + switch (cond) { + case Assembler::Equal: + case Assembler::NotEqual: + case Assembler::Above: + case Assembler::AboveOrEqual: + case Assembler::Below: + case Assembler::BelowOrEqual: + load16ZeroExtend(lhs, scratch2); + ma_cmp_set(dest, scratch2, Imm32(uint16_t(rhs.value)), cond); + break; + + case Assembler::GreaterThan: + case Assembler::GreaterThanOrEqual: + case Assembler::LessThan: + case Assembler::LessThanOrEqual: + load16SignExtend(lhs, scratch2); + ma_cmp_set(dest, scratch2, Imm32(int16_t(rhs.value)), cond); + break; + + default: + MOZ_CRASH("unexpected condition"); + } +} + +// =============================================================== +// Branch functions + +void MacroAssembler::branch8(Condition cond, const Address& lhs, Imm32 rhs, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + MOZ_ASSERT(scratch2 != lhs.base); + + switch (cond) { + case Assembler::Equal: + case Assembler::NotEqual: + case Assembler::Above: + case Assembler::AboveOrEqual: + case Assembler::Below: + case Assembler::BelowOrEqual: + load8ZeroExtend(lhs, scratch2); + branch32(cond, scratch2, Imm32(uint8_t(rhs.value)), label); + break; + + case Assembler::GreaterThan: + case Assembler::GreaterThanOrEqual: + case Assembler::LessThan: + case Assembler::LessThanOrEqual: + load8SignExtend(lhs, scratch2); + branch32(cond, scratch2, Imm32(int8_t(rhs.value)), label); + break; + + default: + MOZ_CRASH("unexpected condition"); + } +} + +void MacroAssembler::branch8(Condition cond, const BaseIndex& lhs, Register rhs, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + MOZ_ASSERT(scratch2 != lhs.base); + + computeScaledAddress(lhs, scratch2); + + switch (cond) { + case Assembler::Equal: + case Assembler::NotEqual: + case Assembler::Above: + case Assembler::AboveOrEqual: + case Assembler::Below: + case Assembler::BelowOrEqual: + load8ZeroExtend(Address(scratch2, lhs.offset), scratch2); + branch32(cond, scratch2, rhs, label); + break; + + case Assembler::GreaterThan: + case Assembler::GreaterThanOrEqual: + case Assembler::LessThan: + case Assembler::LessThanOrEqual: + load8SignExtend(Address(scratch2, lhs.offset), scratch2); + branch32(cond, scratch2, rhs, label); + break; + + default: + MOZ_CRASH("unexpected condition"); + } +} + +void MacroAssembler::branch16(Condition cond, const Address& lhs, Imm32 rhs, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + MOZ_ASSERT(scratch2 != lhs.base); + + switch (cond) { + case Assembler::Equal: + case Assembler::NotEqual: + case Assembler::Above: + case Assembler::AboveOrEqual: + case Assembler::Below: + case Assembler::BelowOrEqual: + load16ZeroExtend(lhs, scratch2); + branch32(cond, scratch2, Imm32(uint16_t(rhs.value)), label); + break; + + case Assembler::GreaterThan: + case Assembler::GreaterThanOrEqual: + case Assembler::LessThan: + case Assembler::LessThanOrEqual: + load16SignExtend(lhs, scratch2); + branch32(cond, scratch2, Imm32(int16_t(rhs.value)), label); + break; + + default: + MOZ_CRASH("unexpected condition"); + } +} + +template <class L> +void MacroAssembler::branch32(Condition cond, Register lhs, Register rhs, + L label) { + ma_b(lhs, rhs, label, cond); +} + +template <class L> +void MacroAssembler::branch32(Condition cond, Register lhs, Imm32 imm, + L label) { + ma_b(lhs, imm, label, cond); +} + +void MacroAssembler::branch32(Condition cond, const Address& lhs, Register rhs, + Label* label) { + load32(lhs, SecondScratchReg); + ma_b(SecondScratchReg, rhs, label, cond); +} + +void MacroAssembler::branch32(Condition cond, const Address& lhs, Imm32 rhs, + Label* label) { + load32(lhs, SecondScratchReg); + ma_b(SecondScratchReg, rhs, label, cond); +} + +void MacroAssembler::branch32(Condition cond, const AbsoluteAddress& lhs, + Register rhs, Label* label) { + load32(lhs, SecondScratchReg); + ma_b(SecondScratchReg, rhs, label, cond); +} + +void MacroAssembler::branch32(Condition cond, const AbsoluteAddress& lhs, + Imm32 rhs, Label* label) { + load32(lhs, SecondScratchReg); + ma_b(SecondScratchReg, rhs, label, cond); +} + +void MacroAssembler::branch32(Condition cond, const BaseIndex& lhs, Imm32 rhs, + Label* label) { + load32(lhs, SecondScratchReg); + ma_b(SecondScratchReg, rhs, label, cond); +} + +void MacroAssembler::branch32(Condition cond, wasm::SymbolicAddress addr, + Imm32 imm, Label* label) { + load32(addr, SecondScratchReg); + ma_b(SecondScratchReg, imm, label, cond); +} + +template <class L> +void MacroAssembler::branchPtr(Condition cond, Register lhs, Register rhs, + L label) { + ma_b(lhs, rhs, label, cond); +} + +void MacroAssembler::branchPtr(Condition cond, Register lhs, Imm32 rhs, + Label* label) { + ma_b(lhs, rhs, label, cond); +} + +void MacroAssembler::branchPtr(Condition cond, Register lhs, ImmPtr rhs, + Label* label) { + ma_b(lhs, rhs, label, cond); +} + +void MacroAssembler::branchPtr(Condition cond, Register lhs, ImmGCPtr rhs, + Label* label) { + ma_b(lhs, rhs, label, cond); +} + +void MacroAssembler::branchPtr(Condition cond, Register lhs, ImmWord rhs, + Label* label) { + ma_b(lhs, rhs, label, cond); +} + +template <class L> +void MacroAssembler::branchPtr(Condition cond, const Address& lhs, Register rhs, + L label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, const Address& lhs, ImmPtr rhs, + Label* label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, const Address& lhs, ImmGCPtr rhs, + Label* label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, const Address& lhs, ImmWord rhs, + Label* label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, const AbsoluteAddress& lhs, + Register rhs, Label* label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, const AbsoluteAddress& lhs, + ImmWord rhs, Label* label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, wasm::SymbolicAddress lhs, + Register rhs, Label* label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, const BaseIndex& lhs, + ImmWord rhs, Label* label) { + loadPtr(lhs, SecondScratchReg); + branchPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchPtr(Condition cond, const BaseIndex& lhs, + Register rhs, Label* label) { + SecondScratchRegisterScope scratch(*this); + loadPtr(lhs, scratch); + branchPtr(cond, scratch, rhs, label); +} + +void MacroAssembler::branchFloat(DoubleCondition cond, FloatRegister lhs, + FloatRegister rhs, Label* label) { + ma_bc1s(lhs, rhs, label, cond); +} + +void MacroAssembler::branchTruncateFloat32ToInt32(FloatRegister src, + Register dest, Label* fail) { + convertFloat32ToInt32(src, dest, fail, false); +} + +void MacroAssembler::branchDouble(DoubleCondition cond, FloatRegister lhs, + FloatRegister rhs, Label* label) { + ma_bc1d(lhs, rhs, label, cond); +} + +void MacroAssembler::branchTruncateDoubleToInt32(FloatRegister src, + Register dest, Label* fail) { + convertDoubleToInt32(src, dest, fail, false); +} + +template <typename T> +void MacroAssembler::branchAdd32(Condition cond, T src, Register dest, + Label* overflow) { + switch (cond) { + case Overflow: + ma_add32TestOverflow(dest, dest, src, overflow); + break; + case CarryClear: + case CarrySet: + ma_add32TestCarry(cond, dest, dest, src, overflow); + break; + default: + MOZ_CRASH("NYI"); + } +} + +template <typename T> +void MacroAssembler::branchSub32(Condition cond, T src, Register dest, + Label* overflow) { + switch (cond) { + case Overflow: + ma_sub32TestOverflow(dest, dest, src, overflow); + break; + case NonZero: + case Zero: + case Signed: + case NotSigned: + ma_subu(dest, src); + ma_b(dest, dest, overflow, cond); + break; + default: + MOZ_CRASH("NYI"); + } +} + +template <typename T> +void MacroAssembler::branchMul32(Condition cond, T src, Register dest, + Label* overflow) { + MOZ_ASSERT(cond == Assembler::Overflow); + ma_mul32TestOverflow(dest, dest, src, overflow); +} + +template <typename T> +void MacroAssembler::branchRshift32(Condition cond, T src, Register dest, + Label* label) { + MOZ_ASSERT(cond == Zero || cond == NonZero); + rshift32(src, dest); + branch32(cond == Zero ? Equal : NotEqual, dest, Imm32(0), label); +} + +void MacroAssembler::branchNeg32(Condition cond, Register reg, Label* label) { + MOZ_ASSERT(cond == Overflow); + neg32(reg); + branch32(Assembler::Equal, reg, Imm32(INT32_MIN), label); +} + +template <typename T> +void MacroAssembler::branchAddPtr(Condition cond, T src, Register dest, + Label* label) { + switch (cond) { + case Overflow: + ma_addPtrTestOverflow(dest, dest, src, label); + break; + case CarryClear: + case CarrySet: + ma_addPtrTestCarry(cond, dest, dest, src, label); + break; + default: + MOZ_CRASH("NYI"); + } +} + +template <typename T> +void MacroAssembler::branchSubPtr(Condition cond, T src, Register dest, + Label* label) { + switch (cond) { + case Overflow: + ma_subPtrTestOverflow(dest, dest, src, label); + break; + case NonZero: + case Zero: + case Signed: + case NotSigned: + subPtr(src, dest); + ma_b(dest, dest, label, cond); + break; + default: + MOZ_CRASH("NYI"); + } +} + +void MacroAssembler::branchMulPtr(Condition cond, Register src, Register dest, + Label* label) { + MOZ_ASSERT(cond == Assembler::Overflow); + ma_mulPtrTestOverflow(dest, dest, src, label); +} + +void MacroAssembler::decBranchPtr(Condition cond, Register lhs, Imm32 rhs, + Label* label) { + subPtr(rhs, lhs); + branchPtr(cond, lhs, Imm32(0), label); +} + +template <class L> +void MacroAssembler::branchTest32(Condition cond, Register lhs, Register rhs, + L label) { + MOZ_ASSERT(cond == Zero || cond == NonZero || cond == Signed || + cond == NotSigned); + if (lhs == rhs) { + ma_b(lhs, rhs, label, cond); + } else { + as_and(ScratchRegister, lhs, rhs); + ma_b(ScratchRegister, ScratchRegister, label, cond); + } +} + +template <class L> +void MacroAssembler::branchTest32(Condition cond, Register lhs, Imm32 rhs, + L label) { + MOZ_ASSERT(cond == Zero || cond == NonZero || cond == Signed || + cond == NotSigned); + ma_and(ScratchRegister, lhs, rhs); + ma_b(ScratchRegister, ScratchRegister, label, cond); +} + +void MacroAssembler::branchTest32(Condition cond, const Address& lhs, Imm32 rhs, + Label* label) { + load32(lhs, SecondScratchReg); + branchTest32(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchTest32(Condition cond, const AbsoluteAddress& lhs, + Imm32 rhs, Label* label) { + load32(lhs, SecondScratchReg); + branchTest32(cond, SecondScratchReg, rhs, label); +} + +template <class L> +void MacroAssembler::branchTestPtr(Condition cond, Register lhs, Register rhs, + L label) { + MOZ_ASSERT(cond == Zero || cond == NonZero || cond == Signed || + cond == NotSigned); + if (lhs == rhs) { + ma_b(lhs, rhs, label, cond); + } else { + as_and(ScratchRegister, lhs, rhs); + ma_b(ScratchRegister, ScratchRegister, label, cond); + } +} + +void MacroAssembler::branchTestPtr(Condition cond, Register lhs, Imm32 rhs, + Label* label) { + MOZ_ASSERT(cond == Zero || cond == NonZero || cond == Signed || + cond == NotSigned); + ma_and(ScratchRegister, lhs, rhs); + ma_b(ScratchRegister, ScratchRegister, label, cond); +} + +void MacroAssembler::branchTestPtr(Condition cond, const Address& lhs, + Imm32 rhs, Label* label) { + loadPtr(lhs, SecondScratchReg); + branchTestPtr(cond, SecondScratchReg, rhs, label); +} + +void MacroAssembler::branchTestUndefined(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_UNDEFINED), label, cond); +} + +void MacroAssembler::branchTestUndefined(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestUndefined(cond, tag, label); +} + +void MacroAssembler::branchTestUndefined(Condition cond, + const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestUndefined(cond, tag, label); +} + +void MacroAssembler::branchTestInt32(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_INT32), label, cond); +} + +void MacroAssembler::branchTestInt32(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestInt32(cond, tag, label); +} + +void MacroAssembler::branchTestInt32(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestInt32(cond, tag, label); +} + +void MacroAssembler::branchTestDouble(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestDouble(cond, tag, label); +} + +void MacroAssembler::branchTestDouble(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestDouble(cond, tag, label); +} + +void MacroAssembler::branchTestDoubleTruthy(bool b, FloatRegister value, + Label* label) { + ma_lid(ScratchDoubleReg, 0.0); + DoubleCondition cond = b ? DoubleNotEqual : DoubleEqualOrUnordered; + ma_bc1d(value, ScratchDoubleReg, label, cond); +} + +void MacroAssembler::branchTestNumber(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + Condition actual = cond == Equal ? BelowOrEqual : Above; + ma_b(tag, ImmTag(JS::detail::ValueUpperInclNumberTag), label, actual); +} + +void MacroAssembler::branchTestBoolean(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_BOOLEAN), label, cond); +} + +void MacroAssembler::branchTestBoolean(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestBoolean(cond, tag, label); +} + +void MacroAssembler::branchTestBoolean(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestBoolean(cond, tag, label); +} + +void MacroAssembler::branchTestString(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_STRING), label, cond); +} + +void MacroAssembler::branchTestString(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestString(cond, tag, label); +} + +void MacroAssembler::branchTestString(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestString(cond, tag, label); +} + +void MacroAssembler::branchTestSymbol(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_SYMBOL), label, cond); +} + +void MacroAssembler::branchTestSymbol(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestSymbol(cond, tag, label); +} + +void MacroAssembler::branchTestSymbol(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestSymbol(cond, tag, label); +} + +void MacroAssembler::branchTestBigInt(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_BIGINT), label, cond); +} + +void MacroAssembler::branchTestBigInt(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestBigInt(cond, tag, label); +} + +void MacroAssembler::branchTestNull(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_NULL), label, cond); +} + +void MacroAssembler::branchTestNull(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestNull(cond, tag, label); +} + +void MacroAssembler::branchTestNull(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestNull(cond, tag, label); +} + +void MacroAssembler::branchTestObject(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_OBJECT), label, cond); +} + +void MacroAssembler::branchTestObject(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestObject(cond, tag, label); +} + +void MacroAssembler::branchTestObject(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestObject(cond, tag, label); +} + +void MacroAssembler::branchTestGCThing(Condition cond, const Address& address, + Label* label) { + branchTestGCThingImpl(cond, address, label); +} + +void MacroAssembler::branchTestGCThing(Condition cond, const BaseIndex& address, + Label* label) { + branchTestGCThingImpl(cond, address, label); +} + +void MacroAssembler::branchTestGCThing(Condition cond, + const ValueOperand& address, + Label* label) { + branchTestGCThingImpl(cond, address, label); +} + +template <typename T> +void MacroAssembler::branchTestGCThingImpl(Condition cond, const T& address, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + ma_b(tag, ImmTag(JS::detail::ValueLowerInclGCThingTag), label, + (cond == Equal) ? AboveOrEqual : Below); +} + +void MacroAssembler::branchTestPrimitive(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JS::detail::ValueUpperExclPrimitiveTag), label, + (cond == Equal) ? Below : AboveOrEqual); +} + +void MacroAssembler::branchTestMagic(Condition cond, Register tag, + Label* label) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(tag, ImmTag(JSVAL_TAG_MAGIC), label, cond); +} + +void MacroAssembler::branchTestMagic(Condition cond, const Address& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestMagic(cond, tag, label); +} + +void MacroAssembler::branchTestMagic(Condition cond, const BaseIndex& address, + Label* label) { + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(address, scratch2); + branchTestMagic(cond, tag, label); +} + +template <typename T> +void MacroAssembler::testNumberSet(Condition cond, const T& src, + Register dest) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(src, scratch2); + ma_cmp_set(dest, tag, ImmTag(JS::detail::ValueUpperInclNumberTag), + cond == Equal ? BelowOrEqual : Above); +} + +template <typename T> +void MacroAssembler::testBooleanSet(Condition cond, const T& src, + Register dest) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(src, scratch2); + ma_cmp_set(dest, tag, ImmTag(JSVAL_TAG_BOOLEAN), cond); +} + +template <typename T> +void MacroAssembler::testStringSet(Condition cond, const T& src, + Register dest) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(src, scratch2); + ma_cmp_set(dest, tag, ImmTag(JSVAL_TAG_STRING), cond); +} + +template <typename T> +void MacroAssembler::testSymbolSet(Condition cond, const T& src, + Register dest) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(src, scratch2); + ma_cmp_set(dest, tag, ImmTag(JSVAL_TAG_SYMBOL), cond); +} + +template <typename T> +void MacroAssembler::testBigIntSet(Condition cond, const T& src, + Register dest) { + MOZ_ASSERT(cond == Equal || cond == NotEqual); + SecondScratchRegisterScope scratch2(*this); + Register tag = extractTag(src, scratch2); + ma_cmp_set(dest, tag, ImmTag(JSVAL_TAG_BIGINT), cond); +} + +void MacroAssembler::branchToComputedAddress(const BaseIndex& addr) { + loadPtr(addr, ScratchRegister); + branch(ScratchRegister); +} + +void MacroAssembler::cmp32Move32(Condition cond, Register lhs, Register rhs, + Register src, Register dest) { + Register scratch = ScratchRegister; + MOZ_ASSERT(src != scratch && dest != scratch); + cmp32Set(cond, lhs, rhs, scratch); +#ifdef MIPSR6 + as_selnez(src, src, scratch); + as_seleqz(dest, dest, scratch); + as_or(dest, dest, src); +#else + as_movn(dest, src, scratch); +#endif +} + +void MacroAssembler::cmp32MovePtr(Condition cond, Register lhs, Imm32 rhs, + Register src, Register dest) { + Register scratch = ScratchRegister; + MOZ_ASSERT(src != scratch && dest != scratch); + cmp32Set(cond, lhs, rhs, scratch); +#ifdef MIPSR6 + as_selnez(src, src, scratch); + as_seleqz(dest, dest, scratch); + as_or(dest, dest, src); +#else + as_movn(dest, src, scratch); +#endif +} + +void MacroAssembler::cmp32Move32(Condition cond, Register lhs, + const Address& rhs, Register src, + Register dest) { + SecondScratchRegisterScope scratch2(*this); + MOZ_ASSERT(lhs != scratch2 && src != scratch2 && dest != scratch2); + load32(rhs, scratch2); + cmp32Move32(cond, lhs, scratch2, src, dest); +} + +void MacroAssembler::cmp32Load32(Condition cond, Register lhs, + const Address& rhs, const Address& src, + Register dest) { + ScratchRegisterScope scratch(*this); + MOZ_ASSERT(lhs != scratch && dest != scratch); + load32(rhs, scratch); + cmp32Load32(cond, lhs, scratch, src, dest); +} + +void MacroAssembler::cmp32Load32(Condition cond, Register lhs, Register rhs, + const Address& src, Register dest) { + Label skip; + branch32(Assembler::InvertCondition(cond), lhs, rhs, &skip); + load32(src, dest); + bind(&skip); +} + +void MacroAssembler::cmp32LoadPtr(Condition cond, const Address& lhs, Imm32 rhs, + const Address& src, Register dest) { + Label skip; + branch32(Assembler::InvertCondition(cond), lhs, rhs, &skip); + loadPtr(src, dest); + bind(&skip); +} + +void MacroAssembler::test32LoadPtr(Condition cond, const Address& addr, + Imm32 mask, const Address& src, + Register dest) { + MOZ_RELEASE_ASSERT(!JitOptions.spectreStringMitigations); + Label skip; + branchTest32(Assembler::InvertCondition(cond), addr, mask, &skip); + loadPtr(src, dest); + bind(&skip); +} + +void MacroAssembler::test32MovePtr(Condition cond, const Address& addr, + Imm32 mask, Register src, Register dest) { + MOZ_CRASH(); +} + +void MacroAssembler::spectreBoundsCheck32(Register index, Register length, + Register maybeScratch, + Label* failure) { + MOZ_RELEASE_ASSERT(!JitOptions.spectreIndexMasking); + branch32(Assembler::BelowOrEqual, length, index, failure); +} + +void MacroAssembler::spectreBoundsCheck32(Register index, const Address& length, + Register maybeScratch, + Label* failure) { + MOZ_RELEASE_ASSERT(!JitOptions.spectreIndexMasking); + branch32(Assembler::BelowOrEqual, length, index, failure); +} + +void MacroAssembler::spectreBoundsCheckPtr(Register index, Register length, + Register maybeScratch, + Label* failure) { + MOZ_RELEASE_ASSERT(!JitOptions.spectreIndexMasking); + branchPtr(Assembler::BelowOrEqual, length, index, failure); +} + +void MacroAssembler::spectreBoundsCheckPtr(Register index, + const Address& length, + Register maybeScratch, + Label* failure) { + MOZ_RELEASE_ASSERT(!JitOptions.spectreIndexMasking); + branchPtr(Assembler::BelowOrEqual, length, index, failure); +} + +void MacroAssembler::spectreMovePtr(Condition cond, Register src, + Register dest) { + MOZ_CRASH(); +} + +void MacroAssembler::spectreZeroRegister(Condition cond, Register scratch, + Register dest) { + MOZ_CRASH(); +} + +// ======================================================================== +// Memory access primitives. + +void MacroAssembler::storeUncanonicalizedDouble(FloatRegister src, + const Address& addr) { + ma_sd(src, addr); +} +void MacroAssembler::storeUncanonicalizedDouble(FloatRegister src, + const BaseIndex& addr) { + ma_sd(src, addr); +} + +void MacroAssembler::storeUncanonicalizedFloat32(FloatRegister src, + const Address& addr) { + ma_ss(src, addr); +} +void MacroAssembler::storeUncanonicalizedFloat32(FloatRegister src, + const BaseIndex& addr) { + ma_ss(src, addr); +} + +void MacroAssembler::memoryBarrier(MemoryBarrierBits barrier) { + if (barrier) { + as_sync(); + } +} + +// =============================================================== +// Clamping functions. + +void MacroAssembler::clampIntToUint8(Register reg) { + // If reg is < 0, then we want to clamp to 0. + as_slti(ScratchRegister, reg, 0); +#ifdef MIPSR6 + as_seleqz(reg, reg, ScratchRegister); +#else + as_movn(reg, zero, ScratchRegister); +#endif + // If reg is >= 255, then we want to clamp to 255. + ma_li(SecondScratchReg, Imm32(255)); + as_slti(ScratchRegister, reg, 255); +#ifdef MIPSR6 + as_seleqz(SecondScratchReg, SecondScratchReg, ScratchRegister); + as_selnez(reg, reg, ScratchRegister); + as_or(reg, reg, SecondScratchReg); +#else + as_movz(reg, SecondScratchReg, ScratchRegister); +#endif +} + +//}}} check_macroassembler_style +// =============================================================== + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_MacroAssembler_mips_shared_inl_h */ diff --git a/js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp b/js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp new file mode 100644 index 0000000000..0f52a28e43 --- /dev/null +++ b/js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp @@ -0,0 +1,3355 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/mips-shared/MacroAssembler-mips-shared.h" + +#include "mozilla/EndianUtils.h" + +#include "jsmath.h" + +#include "jit/MacroAssembler.h" + +using namespace js; +using namespace jit; + +void MacroAssemblerMIPSShared::ma_move(Register rd, Register rs) { + as_or(rd, rs, zero); +} + +void MacroAssemblerMIPSShared::ma_li(Register dest, ImmGCPtr ptr) { + writeDataRelocation(ptr); + asMasm().ma_liPatchable(dest, ImmPtr(ptr.value)); +} + +void MacroAssemblerMIPSShared::ma_li(Register dest, Imm32 imm) { + if (Imm16::IsInSignedRange(imm.value)) { + as_addiu(dest, zero, imm.value); + } else if (Imm16::IsInUnsignedRange(imm.value)) { + as_ori(dest, zero, Imm16::Lower(imm).encode()); + } else if (Imm16::Lower(imm).encode() == 0) { + as_lui(dest, Imm16::Upper(imm).encode()); + } else { + as_lui(dest, Imm16::Upper(imm).encode()); + as_ori(dest, dest, Imm16::Lower(imm).encode()); + } +} + +// This method generates lui and ori instruction pair that can be modified by +// UpdateLuiOriValue, either during compilation (eg. Assembler::bind), or +// during execution (eg. jit::PatchJump). +void MacroAssemblerMIPSShared::ma_liPatchable(Register dest, Imm32 imm) { + m_buffer.ensureSpace(2 * sizeof(uint32_t)); + as_lui(dest, Imm16::Upper(imm).encode()); + as_ori(dest, dest, Imm16::Lower(imm).encode()); +} + +// Shifts +void MacroAssemblerMIPSShared::ma_sll(Register rd, Register rt, Imm32 shift) { + as_sll(rd, rt, shift.value % 32); +} +void MacroAssemblerMIPSShared::ma_srl(Register rd, Register rt, Imm32 shift) { + as_srl(rd, rt, shift.value % 32); +} + +void MacroAssemblerMIPSShared::ma_sra(Register rd, Register rt, Imm32 shift) { + as_sra(rd, rt, shift.value % 32); +} + +void MacroAssemblerMIPSShared::ma_ror(Register rd, Register rt, Imm32 shift) { + if (hasR2()) { + as_rotr(rd, rt, shift.value % 32); + } else { + ScratchRegisterScope scratch(asMasm()); + as_srl(scratch, rt, shift.value % 32); + as_sll(rd, rt, (32 - (shift.value % 32)) % 32); + as_or(rd, rd, scratch); + } +} + +void MacroAssemblerMIPSShared::ma_rol(Register rd, Register rt, Imm32 shift) { + if (hasR2()) { + as_rotr(rd, rt, (32 - (shift.value % 32)) % 32); + } else { + ScratchRegisterScope scratch(asMasm()); + as_srl(scratch, rt, (32 - (shift.value % 32)) % 32); + as_sll(rd, rt, shift.value % 32); + as_or(rd, rd, scratch); + } +} + +void MacroAssemblerMIPSShared::ma_sll(Register rd, Register rt, + Register shift) { + as_sllv(rd, rt, shift); +} + +void MacroAssemblerMIPSShared::ma_srl(Register rd, Register rt, + Register shift) { + as_srlv(rd, rt, shift); +} + +void MacroAssemblerMIPSShared::ma_sra(Register rd, Register rt, + Register shift) { + as_srav(rd, rt, shift); +} + +void MacroAssemblerMIPSShared::ma_ror(Register rd, Register rt, + Register shift) { + if (hasR2()) { + as_rotrv(rd, rt, shift); + } else { + ScratchRegisterScope scratch(asMasm()); + ma_negu(scratch, shift); + as_sllv(scratch, rt, scratch); + as_srlv(rd, rt, shift); + as_or(rd, rd, scratch); + } +} + +void MacroAssemblerMIPSShared::ma_rol(Register rd, Register rt, + Register shift) { + ScratchRegisterScope scratch(asMasm()); + ma_negu(scratch, shift); + if (hasR2()) { + as_rotrv(rd, rt, scratch); + } else { + as_srlv(rd, rt, scratch); + as_sllv(scratch, rt, shift); + as_or(rd, rd, scratch); + } +} + +void MacroAssemblerMIPSShared::ma_negu(Register rd, Register rs) { + as_subu(rd, zero, rs); +} + +void MacroAssemblerMIPSShared::ma_not(Register rd, Register rs) { + as_nor(rd, rs, zero); +} + +// Bit extract/insert +void MacroAssemblerMIPSShared::ma_ext(Register rt, Register rs, uint16_t pos, + uint16_t size) { + MOZ_ASSERT(pos < 32); + MOZ_ASSERT(pos + size < 33); + + if (hasR2()) { + as_ext(rt, rs, pos, size); + } else { + int shift_left = 32 - (pos + size); + as_sll(rt, rs, shift_left); + int shift_right = 32 - size; + if (shift_right > 0) { + as_srl(rt, rt, shift_right); + } + } +} + +void MacroAssemblerMIPSShared::ma_ins(Register rt, Register rs, uint16_t pos, + uint16_t size) { + MOZ_ASSERT(pos < 32); + MOZ_ASSERT(pos + size <= 32); + MOZ_ASSERT(size != 0); + + if (hasR2()) { + as_ins(rt, rs, pos, size); + } else { + ScratchRegisterScope scratch(asMasm()); + SecondScratchRegisterScope scratch2(asMasm()); + ma_subu(scratch, zero, Imm32(1)); + as_srl(scratch, scratch, 32 - size); + as_and(scratch2, rs, scratch); + as_sll(scratch2, scratch2, pos); + as_sll(scratch, scratch, pos); + as_nor(scratch, scratch, zero); + as_and(scratch, rt, scratch); + as_or(rt, scratch2, scratch); + } +} + +// Sign extend +void MacroAssemblerMIPSShared::ma_seb(Register rd, Register rt) { + if (hasR2()) { + as_seb(rd, rt); + } else { + as_sll(rd, rt, 24); + as_sra(rd, rd, 24); + } +} + +void MacroAssemblerMIPSShared::ma_seh(Register rd, Register rt) { + if (hasR2()) { + as_seh(rd, rt); + } else { + as_sll(rd, rt, 16); + as_sra(rd, rd, 16); + } +} + +// And. +void MacroAssemblerMIPSShared::ma_and(Register rd, Register rs) { + as_and(rd, rd, rs); +} + +void MacroAssemblerMIPSShared::ma_and(Register rd, Imm32 imm) { + ma_and(rd, rd, imm); +} + +void MacroAssemblerMIPSShared::ma_and(Register rd, Register rs, Imm32 imm) { + if (Imm16::IsInUnsignedRange(imm.value)) { + as_andi(rd, rs, imm.value); + } else { + ma_li(ScratchRegister, imm); + as_and(rd, rs, ScratchRegister); + } +} + +// Or. +void MacroAssemblerMIPSShared::ma_or(Register rd, Register rs) { + as_or(rd, rd, rs); +} + +void MacroAssemblerMIPSShared::ma_or(Register rd, Imm32 imm) { + ma_or(rd, rd, imm); +} + +void MacroAssemblerMIPSShared::ma_or(Register rd, Register rs, Imm32 imm) { + if (Imm16::IsInUnsignedRange(imm.value)) { + as_ori(rd, rs, imm.value); + } else { + ma_li(ScratchRegister, imm); + as_or(rd, rs, ScratchRegister); + } +} + +// xor +void MacroAssemblerMIPSShared::ma_xor(Register rd, Register rs) { + as_xor(rd, rd, rs); +} + +void MacroAssemblerMIPSShared::ma_xor(Register rd, Imm32 imm) { + ma_xor(rd, rd, imm); +} + +void MacroAssemblerMIPSShared::ma_xor(Register rd, Register rs, Imm32 imm) { + if (Imm16::IsInUnsignedRange(imm.value)) { + as_xori(rd, rs, imm.value); + } else { + ma_li(ScratchRegister, imm); + as_xor(rd, rs, ScratchRegister); + } +} + +// word swap bytes within halfwords +void MacroAssemblerMIPSShared::ma_wsbh(Register rd, Register rt) { + as_wsbh(rd, rt); +} + +void MacroAssemblerMIPSShared::ma_ctz(Register rd, Register rs) { + as_addiu(ScratchRegister, rs, -1); + as_xor(rd, ScratchRegister, rs); + as_and(rd, rd, ScratchRegister); + as_clz(rd, rd); + ma_li(ScratchRegister, Imm32(0x20)); + as_subu(rd, ScratchRegister, rd); +} + +// Arithmetic-based ops. + +// Add. +void MacroAssemblerMIPSShared::ma_addu(Register rd, Register rs, Imm32 imm) { + if (Imm16::IsInSignedRange(imm.value)) { + as_addiu(rd, rs, imm.value); + } else { + ma_li(ScratchRegister, imm); + as_addu(rd, rs, ScratchRegister); + } +} + +void MacroAssemblerMIPSShared::ma_addu(Register rd, Register rs) { + as_addu(rd, rd, rs); +} + +void MacroAssemblerMIPSShared::ma_addu(Register rd, Imm32 imm) { + ma_addu(rd, rd, imm); +} + +void MacroAssemblerMIPSShared::ma_add32TestCarry(Condition cond, Register rd, + Register rs, Register rt, + Label* overflow) { + MOZ_ASSERT(cond == Assembler::CarrySet || cond == Assembler::CarryClear); + MOZ_ASSERT_IF(rd == rs, rt != rd); + as_addu(rd, rs, rt); + as_sltu(SecondScratchReg, rd, rd == rs ? rt : rs); + ma_b(SecondScratchReg, SecondScratchReg, overflow, + cond == Assembler::CarrySet ? Assembler::NonZero : Assembler::Zero); +} + +void MacroAssemblerMIPSShared::ma_add32TestCarry(Condition cond, Register rd, + Register rs, Imm32 imm, + Label* overflow) { + ma_li(ScratchRegister, imm); + ma_add32TestCarry(cond, rd, rs, ScratchRegister, overflow); +} + +// Subtract. +void MacroAssemblerMIPSShared::ma_subu(Register rd, Register rs, Imm32 imm) { + if (Imm16::IsInSignedRange(-imm.value)) { + as_addiu(rd, rs, -imm.value); + } else { + ma_li(ScratchRegister, imm); + as_subu(rd, rs, ScratchRegister); + } +} + +void MacroAssemblerMIPSShared::ma_subu(Register rd, Imm32 imm) { + ma_subu(rd, rd, imm); +} + +void MacroAssemblerMIPSShared::ma_subu(Register rd, Register rs) { + as_subu(rd, rd, rs); +} + +void MacroAssemblerMIPSShared::ma_sub32TestOverflow(Register rd, Register rs, + Imm32 imm, + Label* overflow) { + if (imm.value != INT32_MIN) { + asMasm().ma_add32TestOverflow(rd, rs, Imm32(-imm.value), overflow); + } else { + ma_li(ScratchRegister, Imm32(imm.value)); + asMasm().ma_sub32TestOverflow(rd, rs, ScratchRegister, overflow); + } +} + +void MacroAssemblerMIPSShared::ma_mul(Register rd, Register rs, Imm32 imm) { + ma_li(ScratchRegister, imm); + as_mul(rd, rs, ScratchRegister); +} + +void MacroAssemblerMIPSShared::ma_mul32TestOverflow(Register rd, Register rs, + Register rt, + Label* overflow) { +#ifdef MIPSR6 + if (rd == rs) { + ma_move(SecondScratchReg, rs); + rs = SecondScratchReg; + } + as_mul(rd, rs, rt); + as_muh(SecondScratchReg, rs, rt); +#else + as_mult(rs, rt); + as_mflo(rd); + as_mfhi(SecondScratchReg); +#endif + as_sra(ScratchRegister, rd, 31); + ma_b(ScratchRegister, SecondScratchReg, overflow, Assembler::NotEqual); +} + +void MacroAssemblerMIPSShared::ma_mul32TestOverflow(Register rd, Register rs, + Imm32 imm, + Label* overflow) { + ma_li(ScratchRegister, imm); + ma_mul32TestOverflow(rd, rs, ScratchRegister, overflow); +} + +void MacroAssemblerMIPSShared::ma_div_branch_overflow(Register rd, Register rs, + Register rt, + Label* overflow) { +#ifdef MIPSR6 + if (rd == rs) { + ma_move(SecondScratchReg, rs); + rs = SecondScratchReg; + } + as_mod(ScratchRegister, rs, rt); +#else + as_div(rs, rt); + as_mfhi(ScratchRegister); +#endif + ma_b(ScratchRegister, ScratchRegister, overflow, Assembler::NonZero); +#ifdef MIPSR6 + as_div(rd, rs, rt); +#else + as_mflo(rd); +#endif +} + +void MacroAssemblerMIPSShared::ma_div_branch_overflow(Register rd, Register rs, + Imm32 imm, + Label* overflow) { + ma_li(ScratchRegister, imm); + ma_div_branch_overflow(rd, rs, ScratchRegister, overflow); +} + +void MacroAssemblerMIPSShared::ma_mod_mask(Register src, Register dest, + Register hold, Register remain, + int32_t shift, Label* negZero) { + // MATH: + // We wish to compute x % (1<<y) - 1 for a known constant, y. + // First, let b = (1<<y) and C = (1<<y)-1, then think of the 32 bit + // dividend as a number in base b, namely + // c_0*1 + c_1*b + c_2*b^2 ... c_n*b^n + // now, since both addition and multiplication commute with modulus, + // x % C == (c_0 + c_1*b + ... + c_n*b^n) % C == + // (c_0 % C) + (c_1%C) * (b % C) + (c_2 % C) * (b^2 % C)... + // now, since b == C + 1, b % C == 1, and b^n % C == 1 + // this means that the whole thing simplifies to: + // c_0 + c_1 + c_2 ... c_n % C + // each c_n can easily be computed by a shift/bitextract, and the modulus + // can be maintained by simply subtracting by C whenever the number gets + // over C. + int32_t mask = (1 << shift) - 1; + Label head, negative, sumSigned, done; + + // hold holds -1 if the value was negative, 1 otherwise. + // remain holds the remaining bits that have not been processed + // SecondScratchReg serves as a temporary location to store extracted bits + // into as well as holding the trial subtraction as a temp value dest is + // the accumulator (and holds the final result) + + // move the whole value into the remain. + ma_move(remain, src); + // Zero out the dest. + ma_li(dest, Imm32(0)); + // Set the hold appropriately. + ma_b(remain, remain, &negative, Signed, ShortJump); + ma_li(hold, Imm32(1)); + ma_b(&head, ShortJump); + + bind(&negative); + ma_li(hold, Imm32(-1)); + ma_negu(remain, remain); + + // Begin the main loop. + bind(&head); + + // Extract the bottom bits into SecondScratchReg. + ma_and(SecondScratchReg, remain, Imm32(mask)); + // Add those bits to the accumulator. + as_addu(dest, dest, SecondScratchReg); + // Do a trial subtraction + ma_subu(SecondScratchReg, dest, Imm32(mask)); + // If (sum - C) > 0, store sum - C back into sum, thus performing a + // modulus. + ma_b(SecondScratchReg, SecondScratchReg, &sumSigned, Signed, ShortJump); + ma_move(dest, SecondScratchReg); + bind(&sumSigned); + // Get rid of the bits that we extracted before. + as_srl(remain, remain, shift); + // If the shift produced zero, finish, otherwise, continue in the loop. + ma_b(remain, remain, &head, NonZero, ShortJump); + // Check the hold to see if we need to negate the result. + ma_b(hold, hold, &done, NotSigned, ShortJump); + + // If the hold was non-zero, negate the result to be in line with + // what JS wants + if (negZero != nullptr) { + // Jump out in case of negative zero. + ma_b(hold, hold, negZero, Zero); + ma_negu(dest, dest); + } else { + ma_negu(dest, dest); + } + + bind(&done); +} + +// Memory. + +void MacroAssemblerMIPSShared::ma_load(Register dest, const BaseIndex& src, + LoadStoreSize size, + LoadStoreExtension extension) { + if (isLoongson() && ZeroExtend != extension && + Imm8::IsInSignedRange(src.offset)) { + Register index = src.index; + + if (src.scale != TimesOne) { + int32_t shift = Imm32::ShiftOf(src.scale).value; + + MOZ_ASSERT(SecondScratchReg != src.base); + index = SecondScratchReg; +#ifdef JS_CODEGEN_MIPS64 + asMasm().ma_dsll(index, src.index, Imm32(shift)); +#else + asMasm().ma_sll(index, src.index, Imm32(shift)); +#endif + } + + switch (size) { + case SizeByte: + as_gslbx(dest, src.base, index, src.offset); + break; + case SizeHalfWord: + as_gslhx(dest, src.base, index, src.offset); + break; + case SizeWord: + as_gslwx(dest, src.base, index, src.offset); + break; + case SizeDouble: + as_gsldx(dest, src.base, index, src.offset); + break; + default: + MOZ_CRASH("Invalid argument for ma_load"); + } + return; + } + + asMasm().computeScaledAddress(src, SecondScratchReg); + asMasm().ma_load(dest, Address(SecondScratchReg, src.offset), size, + extension); +} + +void MacroAssemblerMIPSShared::ma_load_unaligned(Register dest, + const BaseIndex& src, + LoadStoreSize size, + LoadStoreExtension extension) { + int16_t lowOffset, hiOffset; + SecondScratchRegisterScope base(asMasm()); + asMasm().computeScaledAddress(src, base); + ScratchRegisterScope scratch(asMasm()); + + if (Imm16::IsInSignedRange(src.offset) && + Imm16::IsInSignedRange(src.offset + size / 8 - 1)) { + lowOffset = Imm16(src.offset).encode(); + hiOffset = Imm16(src.offset + size / 8 - 1).encode(); + } else { + ma_li(scratch, Imm32(src.offset)); + asMasm().addPtr(scratch, base); + lowOffset = Imm16(0).encode(); + hiOffset = Imm16(size / 8 - 1).encode(); + } + + switch (size) { + case SizeHalfWord: + MOZ_ASSERT(dest != scratch); + if (extension == ZeroExtend) { + as_lbu(scratch, base, hiOffset); + } else { + as_lb(scratch, base, hiOffset); + } + as_lbu(dest, base, lowOffset); + ma_ins(dest, scratch, 8, 24); + break; + case SizeWord: + MOZ_ASSERT(dest != base); + as_lwl(dest, base, hiOffset); + as_lwr(dest, base, lowOffset); +#ifdef JS_CODEGEN_MIPS64 + if (extension == ZeroExtend) { + as_dext(dest, dest, 0, 32); + } +#endif + break; +#ifdef JS_CODEGEN_MIPS64 + case SizeDouble: + MOZ_ASSERT(dest != base); + as_ldl(dest, base, hiOffset); + as_ldr(dest, base, lowOffset); + break; +#endif + default: + MOZ_CRASH("Invalid argument for ma_load_unaligned"); + } +} + +void MacroAssemblerMIPSShared::ma_load_unaligned(Register dest, + const Address& address, + LoadStoreSize size, + LoadStoreExtension extension) { + int16_t lowOffset, hiOffset; + ScratchRegisterScope scratch1(asMasm()); + SecondScratchRegisterScope scratch2(asMasm()); + Register base; + + if (Imm16::IsInSignedRange(address.offset) && + Imm16::IsInSignedRange(address.offset + size / 8 - 1)) { + base = address.base; + lowOffset = Imm16(address.offset).encode(); + hiOffset = Imm16(address.offset + size / 8 - 1).encode(); + } else { + ma_li(scratch1, Imm32(address.offset)); + asMasm().addPtr(address.base, scratch1); + base = scratch1; + lowOffset = Imm16(0).encode(); + hiOffset = Imm16(size / 8 - 1).encode(); + } + + switch (size) { + case SizeHalfWord: + MOZ_ASSERT(base != scratch2 && dest != scratch2); + if (extension == ZeroExtend) { + as_lbu(scratch2, base, hiOffset); + } else { + as_lb(scratch2, base, hiOffset); + } + as_lbu(dest, base, lowOffset); + ma_ins(dest, scratch2, 8, 24); + break; + case SizeWord: + MOZ_ASSERT(dest != base); + as_lwl(dest, base, hiOffset); + as_lwr(dest, base, lowOffset); +#ifdef JS_CODEGEN_MIPS64 + if (extension == ZeroExtend) { + as_dext(dest, dest, 0, 32); + } +#endif + break; +#ifdef JS_CODEGEN_MIPS64 + case SizeDouble: + MOZ_ASSERT(dest != base); + as_ldl(dest, base, hiOffset); + as_ldr(dest, base, lowOffset); + break; +#endif + default: + MOZ_CRASH("Invalid argument for ma_load_unaligned"); + } +} + +void MacroAssemblerMIPSShared::ma_load_unaligned( + const wasm::MemoryAccessDesc& access, Register dest, const BaseIndex& src, + Register temp, LoadStoreSize size, LoadStoreExtension extension) { + MOZ_ASSERT(MOZ_LITTLE_ENDIAN(), "Wasm-only; wasm is disabled on big-endian."); + int16_t lowOffset, hiOffset; + Register base; + + asMasm().computeScaledAddress(src, SecondScratchReg); + + if (Imm16::IsInSignedRange(src.offset) && + Imm16::IsInSignedRange(src.offset + size / 8 - 1)) { + base = SecondScratchReg; + lowOffset = Imm16(src.offset).encode(); + hiOffset = Imm16(src.offset + size / 8 - 1).encode(); + } else { + ma_li(ScratchRegister, Imm32(src.offset)); + asMasm().addPtr(SecondScratchReg, ScratchRegister); + base = ScratchRegister; + lowOffset = Imm16(0).encode(); + hiOffset = Imm16(size / 8 - 1).encode(); + } + + BufferOffset load; + switch (size) { + case SizeHalfWord: + if (extension == ZeroExtend) { + load = as_lbu(temp, base, hiOffset); + } else { + load = as_lb(temp, base, hiOffset); + } + as_lbu(dest, base, lowOffset); + ma_ins(dest, temp, 8, 24); + break; + case SizeWord: + load = as_lwl(dest, base, hiOffset); + as_lwr(dest, base, lowOffset); +#ifdef JS_CODEGEN_MIPS64 + if (extension == ZeroExtend) { + as_dext(dest, dest, 0, 32); + } +#endif + break; +#ifdef JS_CODEGEN_MIPS64 + case SizeDouble: + load = as_ldl(dest, base, hiOffset); + as_ldr(dest, base, lowOffset); + break; +#endif + default: + MOZ_CRASH("Invalid argument for ma_load"); + } + + append(access, load.getOffset()); +} + +void MacroAssemblerMIPSShared::ma_store(Register data, const BaseIndex& dest, + LoadStoreSize size, + LoadStoreExtension extension) { + if (isLoongson() && Imm8::IsInSignedRange(dest.offset)) { + Register index = dest.index; + + if (dest.scale != TimesOne) { + int32_t shift = Imm32::ShiftOf(dest.scale).value; + + MOZ_ASSERT(SecondScratchReg != dest.base); + index = SecondScratchReg; +#ifdef JS_CODEGEN_MIPS64 + asMasm().ma_dsll(index, dest.index, Imm32(shift)); +#else + asMasm().ma_sll(index, dest.index, Imm32(shift)); +#endif + } + + switch (size) { + case SizeByte: + as_gssbx(data, dest.base, index, dest.offset); + break; + case SizeHalfWord: + as_gsshx(data, dest.base, index, dest.offset); + break; + case SizeWord: + as_gsswx(data, dest.base, index, dest.offset); + break; + case SizeDouble: + as_gssdx(data, dest.base, index, dest.offset); + break; + default: + MOZ_CRASH("Invalid argument for ma_store"); + } + return; + } + + asMasm().computeScaledAddress(dest, SecondScratchReg); + asMasm().ma_store(data, Address(SecondScratchReg, dest.offset), size, + extension); +} + +void MacroAssemblerMIPSShared::ma_store(Imm32 imm, const BaseIndex& dest, + LoadStoreSize size, + LoadStoreExtension extension) { + if (isLoongson() && Imm8::IsInSignedRange(dest.offset)) { + Register data = zero; + Register index = dest.index; + + if (imm.value) { + MOZ_ASSERT(ScratchRegister != dest.base); + MOZ_ASSERT(ScratchRegister != dest.index); + data = ScratchRegister; + ma_li(data, imm); + } + + if (dest.scale != TimesOne) { + int32_t shift = Imm32::ShiftOf(dest.scale).value; + + MOZ_ASSERT(SecondScratchReg != dest.base); + index = SecondScratchReg; +#ifdef JS_CODEGEN_MIPS64 + asMasm().ma_dsll(index, dest.index, Imm32(shift)); +#else + asMasm().ma_sll(index, dest.index, Imm32(shift)); +#endif + } + + switch (size) { + case SizeByte: + as_gssbx(data, dest.base, index, dest.offset); + break; + case SizeHalfWord: + as_gsshx(data, dest.base, index, dest.offset); + break; + case SizeWord: + as_gsswx(data, dest.base, index, dest.offset); + break; + case SizeDouble: + as_gssdx(data, dest.base, index, dest.offset); + break; + default: + MOZ_CRASH("Invalid argument for ma_store"); + } + return; + } + + // Make sure that SecondScratchReg contains absolute address so that + // offset is 0. + asMasm().computeEffectiveAddress(dest, SecondScratchReg); + + // Scrach register is free now, use it for loading imm value + ma_li(ScratchRegister, imm); + + // with offset=0 ScratchRegister will not be used in ma_store() + // so we can use it as a parameter here + asMasm().ma_store(ScratchRegister, Address(SecondScratchReg, 0), size, + extension); +} + +void MacroAssemblerMIPSShared::ma_store_unaligned(Register data, + const Address& address, + LoadStoreSize size) { + int16_t lowOffset, hiOffset; + ScratchRegisterScope scratch(asMasm()); + Register base; + + if (Imm16::IsInSignedRange(address.offset) && + Imm16::IsInSignedRange(address.offset + size / 8 - 1)) { + base = address.base; + lowOffset = Imm16(address.offset).encode(); + hiOffset = Imm16(address.offset + size / 8 - 1).encode(); + } else { + ma_li(scratch, Imm32(address.offset)); + asMasm().addPtr(address.base, scratch); + base = scratch; + lowOffset = Imm16(0).encode(); + hiOffset = Imm16(size / 8 - 1).encode(); + } + + switch (size) { + case SizeHalfWord: { + SecondScratchRegisterScope scratch2(asMasm()); + MOZ_ASSERT(base != scratch2); + as_sb(data, base, lowOffset); + ma_ext(scratch2, data, 8, 8); + as_sb(scratch2, base, hiOffset); + break; + } + case SizeWord: + as_swl(data, base, hiOffset); + as_swr(data, base, lowOffset); + break; +#ifdef JS_CODEGEN_MIPS64 + case SizeDouble: + as_sdl(data, base, hiOffset); + as_sdr(data, base, lowOffset); + break; +#endif + default: + MOZ_CRASH("Invalid argument for ma_store_unaligned"); + } +} + +void MacroAssemblerMIPSShared::ma_store_unaligned(Register data, + const BaseIndex& dest, + LoadStoreSize size) { + int16_t lowOffset, hiOffset; + SecondScratchRegisterScope base(asMasm()); + asMasm().computeScaledAddress(dest, base); + ScratchRegisterScope scratch(asMasm()); + + if (Imm16::IsInSignedRange(dest.offset) && + Imm16::IsInSignedRange(dest.offset + size / 8 - 1)) { + lowOffset = Imm16(dest.offset).encode(); + hiOffset = Imm16(dest.offset + size / 8 - 1).encode(); + } else { + ma_li(scratch, Imm32(dest.offset)); + asMasm().addPtr(scratch, base); + lowOffset = Imm16(0).encode(); + hiOffset = Imm16(size / 8 - 1).encode(); + } + + switch (size) { + case SizeHalfWord: + MOZ_ASSERT(base != scratch); + as_sb(data, base, lowOffset); + ma_ext(scratch, data, 8, 8); + as_sb(scratch, base, hiOffset); + break; + case SizeWord: + as_swl(data, base, hiOffset); + as_swr(data, base, lowOffset); + break; +#ifdef JS_CODEGEN_MIPS64 + case SizeDouble: + as_sdl(data, base, hiOffset); + as_sdr(data, base, lowOffset); + break; +#endif + default: + MOZ_CRASH("Invalid argument for ma_store_unaligned"); + } +} + +void MacroAssemblerMIPSShared::ma_store_unaligned( + const wasm::MemoryAccessDesc& access, Register data, const BaseIndex& dest, + Register temp, LoadStoreSize size, LoadStoreExtension extension) { + MOZ_ASSERT(MOZ_LITTLE_ENDIAN(), "Wasm-only; wasm is disabled on big-endian."); + int16_t lowOffset, hiOffset; + Register base; + + asMasm().computeScaledAddress(dest, SecondScratchReg); + + if (Imm16::IsInSignedRange(dest.offset) && + Imm16::IsInSignedRange(dest.offset + size / 8 - 1)) { + base = SecondScratchReg; + lowOffset = Imm16(dest.offset).encode(); + hiOffset = Imm16(dest.offset + size / 8 - 1).encode(); + } else { + ma_li(ScratchRegister, Imm32(dest.offset)); + asMasm().addPtr(SecondScratchReg, ScratchRegister); + base = ScratchRegister; + lowOffset = Imm16(0).encode(); + hiOffset = Imm16(size / 8 - 1).encode(); + } + + BufferOffset store; + switch (size) { + case SizeHalfWord: + ma_ext(temp, data, 8, 8); + store = as_sb(temp, base, hiOffset); + as_sb(data, base, lowOffset); + break; + case SizeWord: + store = as_swl(data, base, hiOffset); + as_swr(data, base, lowOffset); + break; +#ifdef JS_CODEGEN_MIPS64 + case SizeDouble: + store = as_sdl(data, base, hiOffset); + as_sdr(data, base, lowOffset); + break; +#endif + default: + MOZ_CRASH("Invalid argument for ma_store"); + } + append(access, store.getOffset()); +} + +// Branches when done from within mips-specific code. +void MacroAssemblerMIPSShared::ma_b(Register lhs, Register rhs, Label* label, + Condition c, JumpKind jumpKind) { + switch (c) { + case Equal: + case NotEqual: + asMasm().branchWithCode(getBranchCode(lhs, rhs, c), label, jumpKind); + break; + case Always: + ma_b(label, jumpKind); + break; + case Zero: + case NonZero: + case Signed: + case NotSigned: + MOZ_ASSERT(lhs == rhs); + asMasm().branchWithCode(getBranchCode(lhs, c), label, jumpKind); + break; + default: + Condition cond = ma_cmp(ScratchRegister, lhs, rhs, c); + asMasm().branchWithCode(getBranchCode(ScratchRegister, cond), label, + jumpKind); + break; + } +} + +void MacroAssemblerMIPSShared::ma_b(Register lhs, Imm32 imm, Label* label, + Condition c, JumpKind jumpKind) { + MOZ_ASSERT(c != Overflow); + if (imm.value == 0) { + if (c == Always || c == AboveOrEqual) { + ma_b(label, jumpKind); + } else if (c == Below) { + ; // This condition is always false. No branch required. + } else { + asMasm().branchWithCode(getBranchCode(lhs, c), label, jumpKind); + } + } else { + switch (c) { + case Equal: + case NotEqual: + MOZ_ASSERT(lhs != ScratchRegister); + ma_li(ScratchRegister, imm); + ma_b(lhs, ScratchRegister, label, c, jumpKind); + break; + default: + Condition cond = ma_cmp(ScratchRegister, lhs, imm, c); + asMasm().branchWithCode(getBranchCode(ScratchRegister, cond), label, + jumpKind); + } + } +} + +void MacroAssemblerMIPSShared::ma_b(Register lhs, ImmPtr imm, Label* l, + Condition c, JumpKind jumpKind) { + asMasm().ma_b(lhs, ImmWord(uintptr_t(imm.value)), l, c, jumpKind); +} + +void MacroAssemblerMIPSShared::ma_b(Label* label, JumpKind jumpKind) { + asMasm().branchWithCode(getBranchCode(BranchIsJump), label, jumpKind); +} + +Assembler::Condition MacroAssemblerMIPSShared::ma_cmp(Register dest, + Register lhs, + Register rhs, + Condition c) { + switch (c) { + case Above: + // bgtu s,t,label => + // sltu at,t,s + // bne at,$zero,offs + as_sltu(dest, rhs, lhs); + return NotEqual; + case AboveOrEqual: + // bgeu s,t,label => + // sltu at,s,t + // beq at,$zero,offs + as_sltu(dest, lhs, rhs); + return Equal; + case Below: + // bltu s,t,label => + // sltu at,s,t + // bne at,$zero,offs + as_sltu(dest, lhs, rhs); + return NotEqual; + case BelowOrEqual: + // bleu s,t,label => + // sltu at,t,s + // beq at,$zero,offs + as_sltu(dest, rhs, lhs); + return Equal; + case GreaterThan: + // bgt s,t,label => + // slt at,t,s + // bne at,$zero,offs + as_slt(dest, rhs, lhs); + return NotEqual; + case GreaterThanOrEqual: + // bge s,t,label => + // slt at,s,t + // beq at,$zero,offs + as_slt(dest, lhs, rhs); + return Equal; + case LessThan: + // blt s,t,label => + // slt at,s,t + // bne at,$zero,offs + as_slt(dest, lhs, rhs); + return NotEqual; + case LessThanOrEqual: + // ble s,t,label => + // slt at,t,s + // beq at,$zero,offs + as_slt(dest, rhs, lhs); + return Equal; + default: + MOZ_CRASH("Invalid condition."); + } + return Always; +} + +Assembler::Condition MacroAssemblerMIPSShared::ma_cmp(Register dest, + Register lhs, Imm32 imm, + Condition c) { + ScratchRegisterScope scratch(asMasm()); + MOZ_ASSERT(lhs != scratch); + + switch (c) { + case Above: + case BelowOrEqual: + if (Imm16::IsInSignedRange(imm.value + 1) && imm.value != -1) { + // lhs <= rhs via lhs < rhs + 1 if rhs + 1 does not overflow + as_sltiu(dest, lhs, imm.value + 1); + + return (c == BelowOrEqual ? NotEqual : Equal); + } else { + ma_li(scratch, imm); + as_sltu(dest, scratch, lhs); + return (c == BelowOrEqual ? Equal : NotEqual); + } + case AboveOrEqual: + case Below: + if (Imm16::IsInSignedRange(imm.value)) { + as_sltiu(dest, lhs, imm.value); + } else { + ma_li(scratch, imm); + as_sltu(dest, lhs, scratch); + } + return (c == AboveOrEqual ? Equal : NotEqual); + case GreaterThan: + case LessThanOrEqual: + if (Imm16::IsInSignedRange(imm.value + 1)) { + // lhs <= rhs via lhs < rhs + 1. + as_slti(dest, lhs, imm.value + 1); + return (c == LessThanOrEqual ? NotEqual : Equal); + } else { + ma_li(scratch, imm); + as_slt(dest, scratch, lhs); + return (c == LessThanOrEqual ? Equal : NotEqual); + } + case GreaterThanOrEqual: + case LessThan: + if (Imm16::IsInSignedRange(imm.value)) { + as_slti(dest, lhs, imm.value); + } else { + ma_li(scratch, imm); + as_slt(dest, lhs, scratch); + } + return (c == GreaterThanOrEqual ? Equal : NotEqual); + default: + MOZ_CRASH("Invalid condition."); + } + return Always; +} + +void MacroAssemblerMIPSShared::ma_cmp_set(Register rd, Register rs, Register rt, + Condition c) { + switch (c) { + case Equal: + // seq d,s,t => + // xor d,s,t + // sltiu d,d,1 + as_xor(rd, rs, rt); + as_sltiu(rd, rd, 1); + break; + case NotEqual: + // sne d,s,t => + // xor d,s,t + // sltu d,$zero,d + as_xor(rd, rs, rt); + as_sltu(rd, zero, rd); + break; + case Above: + // sgtu d,s,t => + // sltu d,t,s + as_sltu(rd, rt, rs); + break; + case AboveOrEqual: + // sgeu d,s,t => + // sltu d,s,t + // xori d,d,1 + as_sltu(rd, rs, rt); + as_xori(rd, rd, 1); + break; + case Below: + // sltu d,s,t + as_sltu(rd, rs, rt); + break; + case BelowOrEqual: + // sleu d,s,t => + // sltu d,t,s + // xori d,d,1 + as_sltu(rd, rt, rs); + as_xori(rd, rd, 1); + break; + case GreaterThan: + // sgt d,s,t => + // slt d,t,s + as_slt(rd, rt, rs); + break; + case GreaterThanOrEqual: + // sge d,s,t => + // slt d,s,t + // xori d,d,1 + as_slt(rd, rs, rt); + as_xori(rd, rd, 1); + break; + case LessThan: + // slt d,s,t + as_slt(rd, rs, rt); + break; + case LessThanOrEqual: + // sle d,s,t => + // slt d,t,s + // xori d,d,1 + as_slt(rd, rt, rs); + as_xori(rd, rd, 1); + break; + case Zero: + MOZ_ASSERT(rs == rt); + // seq d,s,$zero => + // sltiu d,s,1 + as_sltiu(rd, rs, 1); + break; + case NonZero: + MOZ_ASSERT(rs == rt); + // sne d,s,$zero => + // sltu d,$zero,s + as_sltu(rd, zero, rs); + break; + case Signed: + MOZ_ASSERT(rs == rt); + as_slt(rd, rs, zero); + break; + case NotSigned: + MOZ_ASSERT(rs == rt); + // sge d,s,$zero => + // slt d,s,$zero + // xori d,d,1 + as_slt(rd, rs, zero); + as_xori(rd, rd, 1); + break; + default: + MOZ_CRASH("Invalid condition."); + } +} + +void MacroAssemblerMIPSShared::compareFloatingPoint( + FloatFormat fmt, FloatRegister lhs, FloatRegister rhs, DoubleCondition c, + FloatTestKind* testKind, FPConditionBit fcc) { + switch (c) { + case DoubleOrdered: + as_cun(fmt, lhs, rhs, fcc); + *testKind = TestForFalse; + break; + case DoubleEqual: + as_ceq(fmt, lhs, rhs, fcc); + *testKind = TestForTrue; + break; + case DoubleNotEqual: + as_cueq(fmt, lhs, rhs, fcc); + *testKind = TestForFalse; + break; + case DoubleGreaterThan: + as_colt(fmt, rhs, lhs, fcc); + *testKind = TestForTrue; + break; + case DoubleGreaterThanOrEqual: + as_cole(fmt, rhs, lhs, fcc); + *testKind = TestForTrue; + break; + case DoubleLessThan: + as_colt(fmt, lhs, rhs, fcc); + *testKind = TestForTrue; + break; + case DoubleLessThanOrEqual: + as_cole(fmt, lhs, rhs, fcc); + *testKind = TestForTrue; + break; + case DoubleUnordered: + as_cun(fmt, lhs, rhs, fcc); + *testKind = TestForTrue; + break; + case DoubleEqualOrUnordered: + as_cueq(fmt, lhs, rhs, fcc); + *testKind = TestForTrue; + break; + case DoubleNotEqualOrUnordered: + as_ceq(fmt, lhs, rhs, fcc); + *testKind = TestForFalse; + break; + case DoubleGreaterThanOrUnordered: + as_cult(fmt, rhs, lhs, fcc); + *testKind = TestForTrue; + break; + case DoubleGreaterThanOrEqualOrUnordered: + as_cule(fmt, rhs, lhs, fcc); + *testKind = TestForTrue; + break; + case DoubleLessThanOrUnordered: + as_cult(fmt, lhs, rhs, fcc); + *testKind = TestForTrue; + break; + case DoubleLessThanOrEqualOrUnordered: + as_cule(fmt, lhs, rhs, fcc); + *testKind = TestForTrue; + break; + default: + MOZ_CRASH("Invalid DoubleCondition."); + } +} + +void MacroAssemblerMIPSShared::ma_cmp_set_double(Register dest, + FloatRegister lhs, + FloatRegister rhs, + DoubleCondition c) { + FloatTestKind moveCondition; + compareFloatingPoint(DoubleFloat, lhs, rhs, c, &moveCondition); + +#ifdef MIPSR6 + as_mfc1(dest, FloatRegisters::f24); + if (moveCondition == TestForTrue) { + as_andi(dest, dest, 0x1); + } else { + as_addiu(dest, dest, 0x1); + } +#else + ma_li(dest, Imm32(1)); + + if (moveCondition == TestForTrue) { + as_movf(dest, zero); + } else { + as_movt(dest, zero); + } +#endif +} + +void MacroAssemblerMIPSShared::ma_cmp_set_float32(Register dest, + FloatRegister lhs, + FloatRegister rhs, + DoubleCondition c) { + FloatTestKind moveCondition; + compareFloatingPoint(SingleFloat, lhs, rhs, c, &moveCondition); + +#ifdef MIPSR6 + as_mfc1(dest, FloatRegisters::f24); + if (moveCondition == TestForTrue) { + as_andi(dest, dest, 0x1); + } else { + as_addiu(dest, dest, 0x1); + } +#else + ma_li(dest, Imm32(1)); + + if (moveCondition == TestForTrue) { + as_movf(dest, zero); + } else { + as_movt(dest, zero); + } +#endif +} + +void MacroAssemblerMIPSShared::ma_cmp_set(Register rd, Register rs, Imm32 imm, + Condition c) { + if (imm.value == 0) { + switch (c) { + case Equal: + case BelowOrEqual: + as_sltiu(rd, rs, 1); + break; + case NotEqual: + case Above: + as_sltu(rd, zero, rs); + break; + case AboveOrEqual: + case Below: + as_ori(rd, zero, c == AboveOrEqual ? 1 : 0); + break; + case GreaterThan: + case LessThanOrEqual: + as_slt(rd, zero, rs); + if (c == LessThanOrEqual) { + as_xori(rd, rd, 1); + } + break; + case LessThan: + case GreaterThanOrEqual: + as_slt(rd, rs, zero); + if (c == GreaterThanOrEqual) { + as_xori(rd, rd, 1); + } + break; + case Zero: + as_sltiu(rd, rs, 1); + break; + case NonZero: + as_sltu(rd, zero, rs); + break; + case Signed: + as_slt(rd, rs, zero); + break; + case NotSigned: + as_slt(rd, rs, zero); + as_xori(rd, rd, 1); + break; + default: + MOZ_CRASH("Invalid condition."); + } + return; + } + + switch (c) { + case Equal: + case NotEqual: + MOZ_ASSERT(rs != ScratchRegister); + ma_xor(rd, rs, imm); + if (c == Equal) { + as_sltiu(rd, rd, 1); + } else { + as_sltu(rd, zero, rd); + } + break; + case Zero: + case NonZero: + case Signed: + case NotSigned: + MOZ_CRASH("Invalid condition."); + default: + Condition cond = ma_cmp(rd, rs, imm, c); + MOZ_ASSERT(cond == Equal || cond == NotEqual); + + if (cond == Equal) as_xori(rd, rd, 1); + } +} + +// fp instructions +void MacroAssemblerMIPSShared::ma_lis(FloatRegister dest, float value) { + Imm32 imm(mozilla::BitwiseCast<uint32_t>(value)); + + if (imm.value != 0) { + ma_li(ScratchRegister, imm); + moveToFloat32(ScratchRegister, dest); + } else { + moveToFloat32(zero, dest); + } +} + +void MacroAssemblerMIPSShared::ma_sd(FloatRegister ft, BaseIndex address) { + if (isLoongson() && Imm8::IsInSignedRange(address.offset)) { + Register index = address.index; + + if (address.scale != TimesOne) { + int32_t shift = Imm32::ShiftOf(address.scale).value; + + MOZ_ASSERT(SecondScratchReg != address.base); + index = SecondScratchReg; +#ifdef JS_CODEGEN_MIPS64 + asMasm().ma_dsll(index, address.index, Imm32(shift)); +#else + asMasm().ma_sll(index, address.index, Imm32(shift)); +#endif + } + + as_gssdx(ft, address.base, index, address.offset); + return; + } + + asMasm().computeScaledAddress(address, SecondScratchReg); + asMasm().ma_sd(ft, Address(SecondScratchReg, address.offset)); +} + +void MacroAssemblerMIPSShared::ma_ss(FloatRegister ft, BaseIndex address) { + if (isLoongson() && Imm8::IsInSignedRange(address.offset)) { + Register index = address.index; + + if (address.scale != TimesOne) { + int32_t shift = Imm32::ShiftOf(address.scale).value; + + MOZ_ASSERT(SecondScratchReg != address.base); + index = SecondScratchReg; +#ifdef JS_CODEGEN_MIPS64 + asMasm().ma_dsll(index, address.index, Imm32(shift)); +#else + asMasm().ma_sll(index, address.index, Imm32(shift)); +#endif + } + + as_gsssx(ft, address.base, index, address.offset); + return; + } + + asMasm().computeScaledAddress(address, SecondScratchReg); + asMasm().ma_ss(ft, Address(SecondScratchReg, address.offset)); +} + +void MacroAssemblerMIPSShared::ma_ld(FloatRegister ft, const BaseIndex& src) { + asMasm().computeScaledAddress(src, SecondScratchReg); + asMasm().ma_ld(ft, Address(SecondScratchReg, src.offset)); +} + +void MacroAssemblerMIPSShared::ma_ls(FloatRegister ft, const BaseIndex& src) { + asMasm().computeScaledAddress(src, SecondScratchReg); + asMasm().ma_ls(ft, Address(SecondScratchReg, src.offset)); +} + +void MacroAssemblerMIPSShared::ma_bc1s(FloatRegister lhs, FloatRegister rhs, + Label* label, DoubleCondition c, + JumpKind jumpKind, FPConditionBit fcc) { + FloatTestKind testKind; + compareFloatingPoint(SingleFloat, lhs, rhs, c, &testKind, fcc); + asMasm().branchWithCode(getBranchCode(testKind, fcc), label, jumpKind); +} + +void MacroAssemblerMIPSShared::ma_bc1d(FloatRegister lhs, FloatRegister rhs, + Label* label, DoubleCondition c, + JumpKind jumpKind, FPConditionBit fcc) { + FloatTestKind testKind; + compareFloatingPoint(DoubleFloat, lhs, rhs, c, &testKind, fcc); + asMasm().branchWithCode(getBranchCode(testKind, fcc), label, jumpKind); +} + +void MacroAssemblerMIPSShared::minMaxDouble(FloatRegister srcDest, + FloatRegister second, + bool handleNaN, bool isMax) { + FloatRegister first = srcDest; + + Assembler::DoubleCondition cond = isMax ? Assembler::DoubleLessThanOrEqual + : Assembler::DoubleGreaterThanOrEqual; + Label nan, equal, done; + FloatTestKind moveCondition; + + // First or second is NaN, result is NaN. + ma_bc1d(first, second, &nan, Assembler::DoubleUnordered, ShortJump); +#ifdef MIPSR6 + if (isMax) { + as_max(DoubleFloat, srcDest, first, second); + } else { + as_min(DoubleFloat, srcDest, first, second); + } +#else + // Make sure we handle -0 and 0 right. + ma_bc1d(first, second, &equal, Assembler::DoubleEqual, ShortJump); + compareFloatingPoint(DoubleFloat, first, second, cond, &moveCondition); + MOZ_ASSERT(TestForTrue == moveCondition); + as_movt(DoubleFloat, first, second); + ma_b(&done, ShortJump); + + // Check for zero. + bind(&equal); + asMasm().loadConstantDouble(0.0, ScratchDoubleReg); + compareFloatingPoint(DoubleFloat, first, ScratchDoubleReg, + Assembler::DoubleEqual, &moveCondition); + + // So now both operands are either -0 or 0. + if (isMax) { + // -0 + -0 = -0 and -0 + 0 = 0. + as_addd(ScratchDoubleReg, first, second); + } else { + as_negd(ScratchDoubleReg, first); + as_subd(ScratchDoubleReg, ScratchDoubleReg, second); + as_negd(ScratchDoubleReg, ScratchDoubleReg); + } + MOZ_ASSERT(TestForTrue == moveCondition); + // First is 0 or -0, move max/min to it, else just return it. + as_movt(DoubleFloat, first, ScratchDoubleReg); +#endif + ma_b(&done, ShortJump); + + bind(&nan); + asMasm().loadConstantDouble(JS::GenericNaN(), srcDest); + + bind(&done); +} + +void MacroAssemblerMIPSShared::minMaxFloat32(FloatRegister srcDest, + FloatRegister second, + bool handleNaN, bool isMax) { + FloatRegister first = srcDest; + + Assembler::DoubleCondition cond = isMax ? Assembler::DoubleLessThanOrEqual + : Assembler::DoubleGreaterThanOrEqual; + Label nan, equal, done; + FloatTestKind moveCondition; + + // First or second is NaN, result is NaN. + ma_bc1s(first, second, &nan, Assembler::DoubleUnordered, ShortJump); +#ifdef MIPSR6 + if (isMax) { + as_max(SingleFloat, srcDest, first, second); + } else { + as_min(SingleFloat, srcDest, first, second); + } +#else + // Make sure we handle -0 and 0 right. + ma_bc1s(first, second, &equal, Assembler::DoubleEqual, ShortJump); + compareFloatingPoint(SingleFloat, first, second, cond, &moveCondition); + MOZ_ASSERT(TestForTrue == moveCondition); + as_movt(SingleFloat, first, second); + ma_b(&done, ShortJump); + + // Check for zero. + bind(&equal); + asMasm().loadConstantFloat32(0.0f, ScratchFloat32Reg); + compareFloatingPoint(SingleFloat, first, ScratchFloat32Reg, + Assembler::DoubleEqual, &moveCondition); + + // So now both operands are either -0 or 0. + if (isMax) { + // -0 + -0 = -0 and -0 + 0 = 0. + as_adds(ScratchFloat32Reg, first, second); + } else { + as_negs(ScratchFloat32Reg, first); + as_subs(ScratchFloat32Reg, ScratchFloat32Reg, second); + as_negs(ScratchFloat32Reg, ScratchFloat32Reg); + } + MOZ_ASSERT(TestForTrue == moveCondition); + // First is 0 or -0, move max/min to it, else just return it. + as_movt(SingleFloat, first, ScratchFloat32Reg); +#endif + ma_b(&done, ShortJump); + + bind(&nan); + asMasm().loadConstantFloat32(JS::GenericNaN(), srcDest); + + bind(&done); +} + +void MacroAssemblerMIPSShared::loadDouble(const Address& address, + FloatRegister dest) { + asMasm().ma_ld(dest, address); +} + +void MacroAssemblerMIPSShared::loadDouble(const BaseIndex& src, + FloatRegister dest) { + asMasm().ma_ld(dest, src); +} + +void MacroAssemblerMIPSShared::loadFloatAsDouble(const Address& address, + FloatRegister dest) { + asMasm().ma_ls(dest, address); + as_cvtds(dest, dest); +} + +void MacroAssemblerMIPSShared::loadFloatAsDouble(const BaseIndex& src, + FloatRegister dest) { + asMasm().loadFloat32(src, dest); + as_cvtds(dest, dest); +} + +void MacroAssemblerMIPSShared::loadFloat32(const Address& address, + FloatRegister dest) { + asMasm().ma_ls(dest, address); +} + +void MacroAssemblerMIPSShared::loadFloat32(const BaseIndex& src, + FloatRegister dest) { + asMasm().ma_ls(dest, src); +} + +void MacroAssemblerMIPSShared::ma_call(ImmPtr dest) { + asMasm().ma_liPatchable(CallReg, dest); + as_jalr(CallReg); + as_nop(); +} + +void MacroAssemblerMIPSShared::ma_jump(ImmPtr dest) { + asMasm().ma_liPatchable(ScratchRegister, dest); + as_jr(ScratchRegister); + as_nop(); +} + +MacroAssembler& MacroAssemblerMIPSShared::asMasm() { + return *static_cast<MacroAssembler*>(this); +} + +const MacroAssembler& MacroAssemblerMIPSShared::asMasm() const { + return *static_cast<const MacroAssembler*>(this); +} + +//{{{ check_macroassembler_style +// =============================================================== +// MacroAssembler high-level usage. + +void MacroAssembler::flush() {} + +// =============================================================== +// Stack manipulation functions. + +void MacroAssembler::Push(Register reg) { + ma_push(reg); + adjustFrame(int32_t(sizeof(intptr_t))); +} + +void MacroAssembler::Push(const Imm32 imm) { + ma_li(ScratchRegister, imm); + ma_push(ScratchRegister); + adjustFrame(int32_t(sizeof(intptr_t))); +} + +void MacroAssembler::Push(const ImmWord imm) { + ma_li(ScratchRegister, imm); + ma_push(ScratchRegister); + adjustFrame(int32_t(sizeof(intptr_t))); +} + +void MacroAssembler::Push(const ImmPtr imm) { + Push(ImmWord(uintptr_t(imm.value))); +} + +void MacroAssembler::Push(const ImmGCPtr ptr) { + ma_li(ScratchRegister, ptr); + ma_push(ScratchRegister); + adjustFrame(int32_t(sizeof(intptr_t))); +} + +void MacroAssembler::Push(FloatRegister f) { + ma_push(f); + adjustFrame(int32_t(f.pushSize())); +} + +void MacroAssembler::Pop(Register reg) { + ma_pop(reg); + adjustFrame(-int32_t(sizeof(intptr_t))); +} + +void MacroAssembler::Pop(FloatRegister f) { + ma_pop(f); + adjustFrame(-int32_t(f.pushSize())); +} + +void MacroAssembler::Pop(const ValueOperand& val) { + popValue(val); + adjustFrame(-int32_t(sizeof(Value))); +} + +void MacroAssembler::PopStackPtr() { + loadPtr(Address(StackPointer, 0), StackPointer); + adjustFrame(-int32_t(sizeof(intptr_t))); +} + +// =============================================================== +// Simple call functions. + +CodeOffset MacroAssembler::call(Register reg) { + as_jalr(reg); + as_nop(); + return CodeOffset(currentOffset()); +} + +CodeOffset MacroAssembler::call(Label* label) { + ma_bal(label); + return CodeOffset(currentOffset()); +} + +CodeOffset MacroAssembler::callWithPatch() { + as_bal(BOffImm16(3 * sizeof(uint32_t))); + addPtr(Imm32(5 * sizeof(uint32_t)), ra); + // Allocate space which will be patched by patchCall(). + spew(".space 32bit initValue 0xffff ffff"); + writeInst(UINT32_MAX); + as_lw(ScratchRegister, ra, -(int32_t)(5 * sizeof(uint32_t))); + addPtr(ra, ScratchRegister); + as_jr(ScratchRegister); + as_nop(); + return CodeOffset(currentOffset()); +} + +void MacroAssembler::patchCall(uint32_t callerOffset, uint32_t calleeOffset) { + BufferOffset call(callerOffset - 7 * sizeof(uint32_t)); + + BOffImm16 offset = BufferOffset(calleeOffset).diffB<BOffImm16>(call); + if (!offset.isInvalid()) { + InstImm* bal = (InstImm*)editSrc(call); + bal->setBOffImm16(offset); + } else { + uint32_t u32Offset = callerOffset - 5 * sizeof(uint32_t); + uint32_t* u32 = + reinterpret_cast<uint32_t*>(editSrc(BufferOffset(u32Offset))); + *u32 = calleeOffset - callerOffset; + } +} + +CodeOffset MacroAssembler::farJumpWithPatch() { + ma_move(SecondScratchReg, ra); + as_bal(BOffImm16(3 * sizeof(uint32_t))); + as_lw(ScratchRegister, ra, 0); + // Allocate space which will be patched by patchFarJump(). + CodeOffset farJump(currentOffset()); + spew(".space 32bit initValue 0xffff ffff"); + writeInst(UINT32_MAX); + addPtr(ra, ScratchRegister); + as_jr(ScratchRegister); + ma_move(ra, SecondScratchReg); + return farJump; +} + +void MacroAssembler::patchFarJump(CodeOffset farJump, uint32_t targetOffset) { + uint32_t* u32 = + reinterpret_cast<uint32_t*>(editSrc(BufferOffset(farJump.offset()))); + MOZ_ASSERT(*u32 == UINT32_MAX); + *u32 = targetOffset - farJump.offset(); +} + +CodeOffset MacroAssembler::call(wasm::SymbolicAddress target) { + movePtr(target, CallReg); + return call(CallReg); +} + +void MacroAssembler::call(const Address& addr) { + loadPtr(addr, CallReg); + call(CallReg); +} + +void MacroAssembler::call(ImmWord target) { call(ImmPtr((void*)target.value)); } + +void MacroAssembler::call(ImmPtr target) { + BufferOffset bo = m_buffer.nextOffset(); + addPendingJump(bo, target, RelocationKind::HARDCODED); + ma_call(target); +} + +void MacroAssembler::call(JitCode* c) { + BufferOffset bo = m_buffer.nextOffset(); + addPendingJump(bo, ImmPtr(c->raw()), RelocationKind::JITCODE); + ma_liPatchable(ScratchRegister, ImmPtr(c->raw())); + callJitNoProfiler(ScratchRegister); +} + +CodeOffset MacroAssembler::nopPatchableToCall() { + // MIPS32 //MIPS64 + as_nop(); // lui // lui + as_nop(); // ori // ori + as_nop(); // jalr // drotr32 + as_nop(); // ori +#ifdef JS_CODEGEN_MIPS64 + as_nop(); // jalr + as_nop(); +#endif + return CodeOffset(currentOffset()); +} + +void MacroAssembler::patchNopToCall(uint8_t* call, uint8_t* target) { +#ifdef JS_CODEGEN_MIPS64 + Instruction* inst = (Instruction*)call - 6 /* six nops */; + Assembler::WriteLoad64Instructions(inst, ScratchRegister, (uint64_t)target); + inst[4] = InstReg(op_special, ScratchRegister, zero, ra, ff_jalr); +#else + Instruction* inst = (Instruction*)call - 4 /* four nops */; + Assembler::WriteLuiOriInstructions(inst, &inst[1], ScratchRegister, + (uint32_t)target); + inst[2] = InstReg(op_special, ScratchRegister, zero, ra, ff_jalr); +#endif +} + +void MacroAssembler::patchCallToNop(uint8_t* call) { +#ifdef JS_CODEGEN_MIPS64 + Instruction* inst = (Instruction*)call - 6 /* six nops */; +#else + Instruction* inst = (Instruction*)call - 4 /* four nops */; +#endif + + inst[0].makeNop(); + inst[1].makeNop(); + inst[2].makeNop(); + inst[3].makeNop(); +#ifdef JS_CODEGEN_MIPS64 + inst[4].makeNop(); + inst[5].makeNop(); +#endif +} + +void MacroAssembler::pushReturnAddress() { push(ra); } + +void MacroAssembler::popReturnAddress() { pop(ra); } + +// =============================================================== +// Jit Frames. + +uint32_t MacroAssembler::pushFakeReturnAddress(Register scratch) { + CodeLabel cl; + + ma_li(scratch, &cl); + Push(scratch); + bind(&cl); + uint32_t retAddr = currentOffset(); + + addCodeLabel(cl); + return retAddr; +} + +void MacroAssembler::loadStoreBuffer(Register ptr, Register buffer) { + ma_and(buffer, ptr, Imm32(int32_t(~gc::ChunkMask))); + loadPtr(Address(buffer, gc::ChunkStoreBufferOffset), buffer); +} + +void MacroAssembler::branchPtrInNurseryChunk(Condition cond, Register ptr, + Register temp, Label* label) { + MOZ_ASSERT(cond == Assembler::Equal || cond == Assembler::NotEqual); + MOZ_ASSERT(ptr != temp); + MOZ_ASSERT(ptr != SecondScratchReg); + + ma_and(SecondScratchReg, ptr, Imm32(int32_t(~gc::ChunkMask))); + branchPtr(InvertCondition(cond), + Address(SecondScratchReg, gc::ChunkStoreBufferOffset), ImmWord(0), + label); +} + +void MacroAssembler::comment(const char* msg) { Assembler::comment(msg); } + +// =============================================================== +// WebAssembly + +CodeOffset MacroAssembler::wasmTrapInstruction() { + CodeOffset offset(currentOffset()); + as_teq(zero, zero, WASM_TRAP); + return offset; +} + +void MacroAssembler::wasmTruncateDoubleToInt32(FloatRegister input, + Register output, + bool isSaturating, + Label* oolEntry) { + as_truncwd(ScratchFloat32Reg, input); + as_cfc1(ScratchRegister, Assembler::FCSR); + moveFromFloat32(ScratchFloat32Reg, output); + ma_ext(ScratchRegister, ScratchRegister, Assembler::CauseV, 1); + ma_b(ScratchRegister, Imm32(0), oolEntry, Assembler::NotEqual); +} + +void MacroAssembler::wasmTruncateFloat32ToInt32(FloatRegister input, + Register output, + bool isSaturating, + Label* oolEntry) { + as_truncws(ScratchFloat32Reg, input); + as_cfc1(ScratchRegister, Assembler::FCSR); + moveFromFloat32(ScratchFloat32Reg, output); + ma_ext(ScratchRegister, ScratchRegister, Assembler::CauseV, 1); + ma_b(ScratchRegister, Imm32(0), oolEntry, Assembler::NotEqual); +} + +void MacroAssembler::oolWasmTruncateCheckF32ToI32(FloatRegister input, + Register output, + TruncFlags flags, + wasm::BytecodeOffset off, + Label* rejoin) { + outOfLineWasmTruncateToInt32Check(input, output, MIRType::Float32, flags, + rejoin, off); +} + +void MacroAssembler::oolWasmTruncateCheckF64ToI32(FloatRegister input, + Register output, + TruncFlags flags, + wasm::BytecodeOffset off, + Label* rejoin) { + outOfLineWasmTruncateToInt32Check(input, output, MIRType::Double, flags, + rejoin, off); +} + +void MacroAssembler::oolWasmTruncateCheckF32ToI64(FloatRegister input, + Register64 output, + TruncFlags flags, + wasm::BytecodeOffset off, + Label* rejoin) { + outOfLineWasmTruncateToInt64Check(input, output, MIRType::Float32, flags, + rejoin, off); +} + +void MacroAssembler::oolWasmTruncateCheckF64ToI64(FloatRegister input, + Register64 output, + TruncFlags flags, + wasm::BytecodeOffset off, + Label* rejoin) { + outOfLineWasmTruncateToInt64Check(input, output, MIRType::Double, flags, + rejoin, off); +} + +void MacroAssemblerMIPSShared::outOfLineWasmTruncateToInt32Check( + FloatRegister input, Register output, MIRType fromType, TruncFlags flags, + Label* rejoin, wasm::BytecodeOffset trapOffset) { + bool isUnsigned = flags & TRUNC_UNSIGNED; + bool isSaturating = flags & TRUNC_SATURATING; + + if (isSaturating) { + if (fromType == MIRType::Double) { + asMasm().loadConstantDouble(0.0, ScratchDoubleReg); + } else { + asMasm().loadConstantFloat32(0.0f, ScratchFloat32Reg); + } + + if (isUnsigned) { + ma_li(output, Imm32(UINT32_MAX)); + + FloatTestKind moveCondition; + compareFloatingPoint( + fromType == MIRType::Double ? DoubleFloat : SingleFloat, input, + fromType == MIRType::Double ? ScratchDoubleReg : ScratchFloat32Reg, + Assembler::DoubleLessThanOrUnordered, &moveCondition); + MOZ_ASSERT(moveCondition == TestForTrue); + + as_movt(output, zero); + } else { + // Positive overflow is already saturated to INT32_MAX, so we only have + // to handle NaN and negative overflow here. + + FloatTestKind moveCondition; + compareFloatingPoint( + fromType == MIRType::Double ? DoubleFloat : SingleFloat, input, input, + Assembler::DoubleUnordered, &moveCondition); + MOZ_ASSERT(moveCondition == TestForTrue); + + as_movt(output, zero); + + compareFloatingPoint( + fromType == MIRType::Double ? DoubleFloat : SingleFloat, input, + fromType == MIRType::Double ? ScratchDoubleReg : ScratchFloat32Reg, + Assembler::DoubleLessThan, &moveCondition); + MOZ_ASSERT(moveCondition == TestForTrue); + + ma_li(ScratchRegister, Imm32(INT32_MIN)); + as_movt(output, ScratchRegister); + } + + MOZ_ASSERT(rejoin->bound()); + asMasm().jump(rejoin); + return; + } + + Label inputIsNaN; + + if (fromType == MIRType::Double) { + asMasm().branchDouble(Assembler::DoubleUnordered, input, input, + &inputIsNaN); + } else if (fromType == MIRType::Float32) { + asMasm().branchFloat(Assembler::DoubleUnordered, input, input, &inputIsNaN); + } + + asMasm().wasmTrap(wasm::Trap::IntegerOverflow, trapOffset); + asMasm().bind(&inputIsNaN); + asMasm().wasmTrap(wasm::Trap::InvalidConversionToInteger, trapOffset); +} + +void MacroAssemblerMIPSShared::outOfLineWasmTruncateToInt64Check( + FloatRegister input, Register64 output_, MIRType fromType, TruncFlags flags, + Label* rejoin, wasm::BytecodeOffset trapOffset) { + bool isUnsigned = flags & TRUNC_UNSIGNED; + bool isSaturating = flags & TRUNC_SATURATING; + + if (isSaturating) { +#if defined(JS_CODEGEN_MIPS32) + // Saturating callouts don't use ool path. + return; +#else + Register output = output_.reg; + + if (fromType == MIRType::Double) { + asMasm().loadConstantDouble(0.0, ScratchDoubleReg); + } else { + asMasm().loadConstantFloat32(0.0f, ScratchFloat32Reg); + } + + if (isUnsigned) { + asMasm().ma_li(output, ImmWord(UINT64_MAX)); + + FloatTestKind moveCondition; + compareFloatingPoint( + fromType == MIRType::Double ? DoubleFloat : SingleFloat, input, + fromType == MIRType::Double ? ScratchDoubleReg : ScratchFloat32Reg, + Assembler::DoubleLessThanOrUnordered, &moveCondition); + MOZ_ASSERT(moveCondition == TestForTrue); + + as_movt(output, zero); + + } else { + // Positive overflow is already saturated to INT64_MAX, so we only have + // to handle NaN and negative overflow here. + + FloatTestKind moveCondition; + compareFloatingPoint( + fromType == MIRType::Double ? DoubleFloat : SingleFloat, input, input, + Assembler::DoubleUnordered, &moveCondition); + MOZ_ASSERT(moveCondition == TestForTrue); + + as_movt(output, zero); + + compareFloatingPoint( + fromType == MIRType::Double ? DoubleFloat : SingleFloat, input, + fromType == MIRType::Double ? ScratchDoubleReg : ScratchFloat32Reg, + Assembler::DoubleLessThan, &moveCondition); + MOZ_ASSERT(moveCondition == TestForTrue); + + asMasm().ma_li(ScratchRegister, ImmWord(INT64_MIN)); + as_movt(output, ScratchRegister); + } + + MOZ_ASSERT(rejoin->bound()); + asMasm().jump(rejoin); + return; +#endif + } + + Label inputIsNaN; + + if (fromType == MIRType::Double) { + asMasm().branchDouble(Assembler::DoubleUnordered, input, input, + &inputIsNaN); + } else if (fromType == MIRType::Float32) { + asMasm().branchFloat(Assembler::DoubleUnordered, input, input, &inputIsNaN); + } + +#if defined(JS_CODEGEN_MIPS32) + + // Only possible valid input that produces INT64_MIN result. + double validInput = + isUnsigned ? double(uint64_t(INT64_MIN)) : double(int64_t(INT64_MIN)); + + if (fromType == MIRType::Double) { + asMasm().loadConstantDouble(validInput, ScratchDoubleReg); + asMasm().branchDouble(Assembler::DoubleEqual, input, ScratchDoubleReg, + rejoin); + } else { + asMasm().loadConstantFloat32(float(validInput), ScratchFloat32Reg); + asMasm().branchFloat(Assembler::DoubleEqual, input, ScratchDoubleReg, + rejoin); + } + +#endif + + asMasm().wasmTrap(wasm::Trap::IntegerOverflow, trapOffset); + asMasm().bind(&inputIsNaN); + asMasm().wasmTrap(wasm::Trap::InvalidConversionToInteger, trapOffset); +} + +void MacroAssembler::wasmLoad(const wasm::MemoryAccessDesc& access, + Register memoryBase, Register ptr, + Register ptrScratch, AnyRegister output) { + wasmLoadImpl(access, memoryBase, ptr, ptrScratch, output, InvalidReg); +} + +void MacroAssembler::wasmUnalignedLoad(const wasm::MemoryAccessDesc& access, + Register memoryBase, Register ptr, + Register ptrScratch, Register output, + Register tmp) { + wasmLoadImpl(access, memoryBase, ptr, ptrScratch, AnyRegister(output), tmp); +} + +void MacroAssembler::wasmUnalignedLoadFP(const wasm::MemoryAccessDesc& access, + Register memoryBase, Register ptr, + Register ptrScratch, + FloatRegister output, Register tmp1) { + wasmLoadImpl(access, memoryBase, ptr, ptrScratch, AnyRegister(output), tmp1); +} + +void MacroAssembler::wasmStore(const wasm::MemoryAccessDesc& access, + AnyRegister value, Register memoryBase, + Register ptr, Register ptrScratch) { + wasmStoreImpl(access, value, memoryBase, ptr, ptrScratch, InvalidReg); +} + +void MacroAssembler::wasmUnalignedStore(const wasm::MemoryAccessDesc& access, + Register value, Register memoryBase, + Register ptr, Register ptrScratch, + Register tmp) { + wasmStoreImpl(access, AnyRegister(value), memoryBase, ptr, ptrScratch, tmp); +} + +void MacroAssembler::wasmUnalignedStoreFP(const wasm::MemoryAccessDesc& access, + FloatRegister floatValue, + Register memoryBase, Register ptr, + Register ptrScratch, Register tmp) { + wasmStoreImpl(access, AnyRegister(floatValue), memoryBase, ptr, ptrScratch, + tmp); +} + +void MacroAssemblerMIPSShared::wasmLoadImpl( + const wasm::MemoryAccessDesc& access, Register memoryBase, Register ptr, + Register ptrScratch, AnyRegister output, Register tmp) { + uint32_t offset = access.offset(); + MOZ_ASSERT(offset < asMasm().wasmMaxOffsetGuardLimit()); + MOZ_ASSERT_IF(offset, ptrScratch != InvalidReg); + + // Maybe add the offset. + if (offset) { + asMasm().addPtr(ImmWord(offset), ptrScratch); + ptr = ptrScratch; + } + + unsigned byteSize = access.byteSize(); + bool isSigned; + bool isFloat = false; + + MOZ_ASSERT(!access.isZeroExtendSimd128Load()); + MOZ_ASSERT(!access.isSplatSimd128Load()); + MOZ_ASSERT(!access.isWidenSimd128Load()); + switch (access.type()) { + case Scalar::Int8: + isSigned = true; + break; + case Scalar::Uint8: + isSigned = false; + break; + case Scalar::Int16: + isSigned = true; + break; + case Scalar::Uint16: + isSigned = false; + break; + case Scalar::Int32: + isSigned = true; + break; + case Scalar::Uint32: + isSigned = false; + break; + case Scalar::Float64: + isFloat = true; + break; + case Scalar::Float32: + isFloat = true; + break; + default: + MOZ_CRASH("unexpected array type"); + } + + BaseIndex address(memoryBase, ptr, TimesOne); + if (IsUnaligned(access)) { + MOZ_ASSERT(tmp != InvalidReg); + if (isFloat) { + if (byteSize == 4) { + asMasm().loadUnalignedFloat32(access, address, tmp, output.fpu()); + } else { + asMasm().loadUnalignedDouble(access, address, tmp, output.fpu()); + } + } else { + asMasm().ma_load_unaligned(access, output.gpr(), address, tmp, + static_cast<LoadStoreSize>(8 * byteSize), + isSigned ? SignExtend : ZeroExtend); + } + return; + } + + asMasm().memoryBarrierBefore(access.sync()); + if (isFloat) { + if (byteSize == 4) { + asMasm().ma_ls(output.fpu(), address); + } else { + asMasm().ma_ld(output.fpu(), address); + } + } else { + asMasm().ma_load(output.gpr(), address, + static_cast<LoadStoreSize>(8 * byteSize), + isSigned ? SignExtend : ZeroExtend); + } + asMasm().append(access, asMasm().size() - 4); + asMasm().memoryBarrierAfter(access.sync()); +} + +void MacroAssemblerMIPSShared::wasmStoreImpl( + const wasm::MemoryAccessDesc& access, AnyRegister value, + Register memoryBase, Register ptr, Register ptrScratch, Register tmp) { + uint32_t offset = access.offset(); + MOZ_ASSERT(offset < asMasm().wasmMaxOffsetGuardLimit()); + MOZ_ASSERT_IF(offset, ptrScratch != InvalidReg); + + // Maybe add the offset. + if (offset) { + asMasm().addPtr(ImmWord(offset), ptrScratch); + ptr = ptrScratch; + } + + unsigned byteSize = access.byteSize(); + bool isSigned; + bool isFloat = false; + + switch (access.type()) { + case Scalar::Int8: + isSigned = true; + break; + case Scalar::Uint8: + isSigned = false; + break; + case Scalar::Int16: + isSigned = true; + break; + case Scalar::Uint16: + isSigned = false; + break; + case Scalar::Int32: + isSigned = true; + break; + case Scalar::Uint32: + isSigned = false; + break; + case Scalar::Int64: + isSigned = true; + break; + case Scalar::Float64: + isFloat = true; + break; + case Scalar::Float32: + isFloat = true; + break; + default: + MOZ_CRASH("unexpected array type"); + } + + BaseIndex address(memoryBase, ptr, TimesOne); + if (IsUnaligned(access)) { + MOZ_ASSERT(tmp != InvalidReg); + if (isFloat) { + if (byteSize == 4) { + asMasm().storeUnalignedFloat32(access, value.fpu(), tmp, address); + } else { + asMasm().storeUnalignedDouble(access, value.fpu(), tmp, address); + } + } else { + asMasm().ma_store_unaligned(access, value.gpr(), address, tmp, + static_cast<LoadStoreSize>(8 * byteSize), + isSigned ? SignExtend : ZeroExtend); + } + return; + } + + asMasm().memoryBarrierBefore(access.sync()); + if (isFloat) { + if (byteSize == 4) { + asMasm().ma_ss(value.fpu(), address); + } else { + asMasm().ma_sd(value.fpu(), address); + } + } else { + asMasm().ma_store(value.gpr(), address, + static_cast<LoadStoreSize>(8 * byteSize), + isSigned ? SignExtend : ZeroExtend); + } + // Only the last emitted instruction is a memory access. + asMasm().append(access, asMasm().size() - 4); + asMasm().memoryBarrierAfter(access.sync()); +} + +void MacroAssembler::enterFakeExitFrameForWasm(Register cxreg, Register scratch, + ExitFrameType type) { + enterFakeExitFrame(cxreg, scratch, type); +} + +// ======================================================================== +// Primitive atomic operations. + +template <typename T> +static void CompareExchange(MacroAssembler& masm, + const wasm::MemoryAccessDesc* access, + Scalar::Type type, const Synchronization& sync, + const T& mem, Register oldval, Register newval, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + bool signExtend = Scalar::isSignedIntType(type); + unsigned nbytes = Scalar::byteSize(type); + + switch (nbytes) { + case 1: + case 2: + break; + case 4: + MOZ_ASSERT(valueTemp == InvalidReg); + MOZ_ASSERT(offsetTemp == InvalidReg); + MOZ_ASSERT(maskTemp == InvalidReg); + break; + default: + MOZ_CRASH(); + } + + Label again, end; + + masm.computeEffectiveAddress(mem, SecondScratchReg); + + if (nbytes == 4) { + masm.memoryBarrierBefore(sync); + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(output, SecondScratchReg, 0); + masm.ma_b(output, oldval, &end, Assembler::NotEqual, ShortJump); + masm.ma_move(ScratchRegister, newval); + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + masm.memoryBarrierAfter(sync); + masm.bind(&end); + + return; + } + + masm.as_andi(offsetTemp, SecondScratchReg, 3); + masm.subPtr(offsetTemp, SecondScratchReg); +#if !MOZ_LITTLE_ENDIAN() + masm.as_xori(offsetTemp, offsetTemp, 3); +#endif + masm.as_sll(offsetTemp, offsetTemp, 3); + masm.ma_li(maskTemp, Imm32(UINT32_MAX >> ((4 - nbytes) * 8))); + masm.as_sllv(maskTemp, maskTemp, offsetTemp); + masm.as_nor(maskTemp, zero, maskTemp); + + masm.memoryBarrierBefore(sync); + + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(ScratchRegister, SecondScratchReg, 0); + + masm.as_srlv(output, ScratchRegister, offsetTemp); + + switch (nbytes) { + case 1: + if (signExtend) { + masm.ma_seb(valueTemp, oldval); + masm.ma_seb(output, output); + } else { + masm.as_andi(valueTemp, oldval, 0xff); + masm.as_andi(output, output, 0xff); + } + break; + case 2: + if (signExtend) { + masm.ma_seh(valueTemp, oldval); + masm.ma_seh(output, output); + } else { + masm.as_andi(valueTemp, oldval, 0xffff); + masm.as_andi(output, output, 0xffff); + } + break; + } + + masm.ma_b(output, valueTemp, &end, Assembler::NotEqual, ShortJump); + + masm.as_sllv(valueTemp, newval, offsetTemp); + masm.as_and(ScratchRegister, ScratchRegister, maskTemp); + masm.as_or(ScratchRegister, ScratchRegister, valueTemp); + + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + masm.memoryBarrierAfter(sync); + + masm.bind(&end); +} + +void MacroAssembler::compareExchange(Scalar::Type type, + const Synchronization& sync, + const Address& mem, Register oldval, + Register newval, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register output) { + CompareExchange(*this, nullptr, type, sync, mem, oldval, newval, valueTemp, + offsetTemp, maskTemp, output); +} + +void MacroAssembler::compareExchange(Scalar::Type type, + const Synchronization& sync, + const BaseIndex& mem, Register oldval, + Register newval, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register output) { + CompareExchange(*this, nullptr, type, sync, mem, oldval, newval, valueTemp, + offsetTemp, maskTemp, output); +} + +void MacroAssembler::wasmCompareExchange(const wasm::MemoryAccessDesc& access, + const Address& mem, Register oldval, + Register newval, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register output) { + CompareExchange(*this, &access, access.type(), access.sync(), mem, oldval, + newval, valueTemp, offsetTemp, maskTemp, output); +} + +void MacroAssembler::wasmCompareExchange(const wasm::MemoryAccessDesc& access, + const BaseIndex& mem, Register oldval, + Register newval, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register output) { + CompareExchange(*this, &access, access.type(), access.sync(), mem, oldval, + newval, valueTemp, offsetTemp, maskTemp, output); +} + +template <typename T> +static void AtomicExchange(MacroAssembler& masm, + const wasm::MemoryAccessDesc* access, + Scalar::Type type, const Synchronization& sync, + const T& mem, Register value, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register output) { + bool signExtend = Scalar::isSignedIntType(type); + unsigned nbytes = Scalar::byteSize(type); + + switch (nbytes) { + case 1: + case 2: + break; + case 4: + MOZ_ASSERT(valueTemp == InvalidReg); + MOZ_ASSERT(offsetTemp == InvalidReg); + MOZ_ASSERT(maskTemp == InvalidReg); + break; + default: + MOZ_CRASH(); + } + + Label again; + + masm.computeEffectiveAddress(mem, SecondScratchReg); + + if (nbytes == 4) { + masm.memoryBarrierBefore(sync); + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(output, SecondScratchReg, 0); + masm.ma_move(ScratchRegister, value); + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + masm.memoryBarrierAfter(sync); + + return; + } + + masm.as_andi(offsetTemp, SecondScratchReg, 3); + masm.subPtr(offsetTemp, SecondScratchReg); +#if !MOZ_LITTLE_ENDIAN() + masm.as_xori(offsetTemp, offsetTemp, 3); +#endif + masm.as_sll(offsetTemp, offsetTemp, 3); + masm.ma_li(maskTemp, Imm32(UINT32_MAX >> ((4 - nbytes) * 8))); + masm.as_sllv(maskTemp, maskTemp, offsetTemp); + masm.as_nor(maskTemp, zero, maskTemp); + switch (nbytes) { + case 1: + masm.as_andi(valueTemp, value, 0xff); + break; + case 2: + masm.as_andi(valueTemp, value, 0xffff); + break; + } + masm.as_sllv(valueTemp, valueTemp, offsetTemp); + + masm.memoryBarrierBefore(sync); + + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(output, SecondScratchReg, 0); + masm.as_and(ScratchRegister, output, maskTemp); + masm.as_or(ScratchRegister, ScratchRegister, valueTemp); + + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + masm.as_srlv(output, output, offsetTemp); + + switch (nbytes) { + case 1: + if (signExtend) { + masm.ma_seb(output, output); + } else { + masm.as_andi(output, output, 0xff); + } + break; + case 2: + if (signExtend) { + masm.ma_seh(output, output); + } else { + masm.as_andi(output, output, 0xffff); + } + break; + } + + masm.memoryBarrierAfter(sync); +} + +void MacroAssembler::atomicExchange(Scalar::Type type, + const Synchronization& sync, + const Address& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + AtomicExchange(*this, nullptr, type, sync, mem, value, valueTemp, offsetTemp, + maskTemp, output); +} + +void MacroAssembler::atomicExchange(Scalar::Type type, + const Synchronization& sync, + const BaseIndex& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + AtomicExchange(*this, nullptr, type, sync, mem, value, valueTemp, offsetTemp, + maskTemp, output); +} + +void MacroAssembler::wasmAtomicExchange(const wasm::MemoryAccessDesc& access, + const Address& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + AtomicExchange(*this, &access, access.type(), access.sync(), mem, value, + valueTemp, offsetTemp, maskTemp, output); +} + +void MacroAssembler::wasmAtomicExchange(const wasm::MemoryAccessDesc& access, + const BaseIndex& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + AtomicExchange(*this, &access, access.type(), access.sync(), mem, value, + valueTemp, offsetTemp, maskTemp, output); +} + +template <typename T> +static void AtomicFetchOp(MacroAssembler& masm, + const wasm::MemoryAccessDesc* access, + Scalar::Type type, const Synchronization& sync, + AtomicOp op, const T& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + bool signExtend = Scalar::isSignedIntType(type); + unsigned nbytes = Scalar::byteSize(type); + + switch (nbytes) { + case 1: + case 2: + break; + case 4: + MOZ_ASSERT(valueTemp == InvalidReg); + MOZ_ASSERT(offsetTemp == InvalidReg); + MOZ_ASSERT(maskTemp == InvalidReg); + break; + default: + MOZ_CRASH(); + } + + Label again; + + masm.computeEffectiveAddress(mem, SecondScratchReg); + + if (nbytes == 4) { + masm.memoryBarrierBefore(sync); + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(output, SecondScratchReg, 0); + + switch (op) { + case AtomicFetchAddOp: + masm.as_addu(ScratchRegister, output, value); + break; + case AtomicFetchSubOp: + masm.as_subu(ScratchRegister, output, value); + break; + case AtomicFetchAndOp: + masm.as_and(ScratchRegister, output, value); + break; + case AtomicFetchOrOp: + masm.as_or(ScratchRegister, output, value); + break; + case AtomicFetchXorOp: + masm.as_xor(ScratchRegister, output, value); + break; + default: + MOZ_CRASH(); + } + + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + masm.memoryBarrierAfter(sync); + + return; + } + + masm.as_andi(offsetTemp, SecondScratchReg, 3); + masm.subPtr(offsetTemp, SecondScratchReg); +#if !MOZ_LITTLE_ENDIAN() + masm.as_xori(offsetTemp, offsetTemp, 3); +#endif + masm.as_sll(offsetTemp, offsetTemp, 3); + masm.ma_li(maskTemp, Imm32(UINT32_MAX >> ((4 - nbytes) * 8))); + masm.as_sllv(maskTemp, maskTemp, offsetTemp); + masm.as_nor(maskTemp, zero, maskTemp); + + masm.memoryBarrierBefore(sync); + + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(ScratchRegister, SecondScratchReg, 0); + masm.as_srlv(output, ScratchRegister, offsetTemp); + + switch (op) { + case AtomicFetchAddOp: + masm.as_addu(valueTemp, output, value); + break; + case AtomicFetchSubOp: + masm.as_subu(valueTemp, output, value); + break; + case AtomicFetchAndOp: + masm.as_and(valueTemp, output, value); + break; + case AtomicFetchOrOp: + masm.as_or(valueTemp, output, value); + break; + case AtomicFetchXorOp: + masm.as_xor(valueTemp, output, value); + break; + default: + MOZ_CRASH(); + } + + switch (nbytes) { + case 1: + masm.as_andi(valueTemp, valueTemp, 0xff); + break; + case 2: + masm.as_andi(valueTemp, valueTemp, 0xffff); + break; + } + + masm.as_sllv(valueTemp, valueTemp, offsetTemp); + + masm.as_and(ScratchRegister, ScratchRegister, maskTemp); + masm.as_or(ScratchRegister, ScratchRegister, valueTemp); + + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + switch (nbytes) { + case 1: + if (signExtend) { + masm.ma_seb(output, output); + } else { + masm.as_andi(output, output, 0xff); + } + break; + case 2: + if (signExtend) { + masm.ma_seh(output, output); + } else { + masm.as_andi(output, output, 0xffff); + } + break; + } + + masm.memoryBarrierAfter(sync); +} + +void MacroAssembler::atomicFetchOp(Scalar::Type type, + const Synchronization& sync, AtomicOp op, + Register value, const Address& mem, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + AtomicFetchOp(*this, nullptr, type, sync, op, mem, value, valueTemp, + offsetTemp, maskTemp, output); +} + +void MacroAssembler::atomicFetchOp(Scalar::Type type, + const Synchronization& sync, AtomicOp op, + Register value, const BaseIndex& mem, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register output) { + AtomicFetchOp(*this, nullptr, type, sync, op, mem, value, valueTemp, + offsetTemp, maskTemp, output); +} + +void MacroAssembler::wasmAtomicFetchOp(const wasm::MemoryAccessDesc& access, + AtomicOp op, Register value, + const Address& mem, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register output) { + AtomicFetchOp(*this, &access, access.type(), access.sync(), op, mem, value, + valueTemp, offsetTemp, maskTemp, output); +} + +void MacroAssembler::wasmAtomicFetchOp(const wasm::MemoryAccessDesc& access, + AtomicOp op, Register value, + const BaseIndex& mem, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register output) { + AtomicFetchOp(*this, &access, access.type(), access.sync(), op, mem, value, + valueTemp, offsetTemp, maskTemp, output); +} + +template <typename T> +static void AtomicEffectOp(MacroAssembler& masm, + const wasm::MemoryAccessDesc* access, + Scalar::Type type, const Synchronization& sync, + AtomicOp op, const T& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp) { + unsigned nbytes = Scalar::byteSize(type); + + switch (nbytes) { + case 1: + case 2: + break; + case 4: + MOZ_ASSERT(valueTemp == InvalidReg); + MOZ_ASSERT(offsetTemp == InvalidReg); + MOZ_ASSERT(maskTemp == InvalidReg); + break; + default: + MOZ_CRASH(); + } + + Label again; + + masm.computeEffectiveAddress(mem, SecondScratchReg); + + if (nbytes == 4) { + masm.memoryBarrierBefore(sync); + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(ScratchRegister, SecondScratchReg, 0); + + switch (op) { + case AtomicFetchAddOp: + masm.as_addu(ScratchRegister, ScratchRegister, value); + break; + case AtomicFetchSubOp: + masm.as_subu(ScratchRegister, ScratchRegister, value); + break; + case AtomicFetchAndOp: + masm.as_and(ScratchRegister, ScratchRegister, value); + break; + case AtomicFetchOrOp: + masm.as_or(ScratchRegister, ScratchRegister, value); + break; + case AtomicFetchXorOp: + masm.as_xor(ScratchRegister, ScratchRegister, value); + break; + default: + MOZ_CRASH(); + } + + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + masm.memoryBarrierAfter(sync); + + return; + } + + masm.as_andi(offsetTemp, SecondScratchReg, 3); + masm.subPtr(offsetTemp, SecondScratchReg); +#if !MOZ_LITTLE_ENDIAN() + masm.as_xori(offsetTemp, offsetTemp, 3); +#endif + masm.as_sll(offsetTemp, offsetTemp, 3); + masm.ma_li(maskTemp, Imm32(UINT32_MAX >> ((4 - nbytes) * 8))); + masm.as_sllv(maskTemp, maskTemp, offsetTemp); + masm.as_nor(maskTemp, zero, maskTemp); + + masm.memoryBarrierBefore(sync); + + masm.bind(&again); + + if (access) { + masm.append(*access, masm.size()); + } + + masm.as_ll(ScratchRegister, SecondScratchReg, 0); + masm.as_srlv(valueTemp, ScratchRegister, offsetTemp); + + switch (op) { + case AtomicFetchAddOp: + masm.as_addu(valueTemp, valueTemp, value); + break; + case AtomicFetchSubOp: + masm.as_subu(valueTemp, valueTemp, value); + break; + case AtomicFetchAndOp: + masm.as_and(valueTemp, valueTemp, value); + break; + case AtomicFetchOrOp: + masm.as_or(valueTemp, valueTemp, value); + break; + case AtomicFetchXorOp: + masm.as_xor(valueTemp, valueTemp, value); + break; + default: + MOZ_CRASH(); + } + + switch (nbytes) { + case 1: + masm.as_andi(valueTemp, valueTemp, 0xff); + break; + case 2: + masm.as_andi(valueTemp, valueTemp, 0xffff); + break; + } + + masm.as_sllv(valueTemp, valueTemp, offsetTemp); + + masm.as_and(ScratchRegister, ScratchRegister, maskTemp); + masm.as_or(ScratchRegister, ScratchRegister, valueTemp); + + masm.as_sc(ScratchRegister, SecondScratchReg, 0); + + masm.ma_b(ScratchRegister, ScratchRegister, &again, Assembler::Zero, + ShortJump); + + masm.memoryBarrierAfter(sync); +} + +void MacroAssembler::wasmAtomicEffectOp(const wasm::MemoryAccessDesc& access, + AtomicOp op, Register value, + const Address& mem, Register valueTemp, + Register offsetTemp, + Register maskTemp) { + AtomicEffectOp(*this, &access, access.type(), access.sync(), op, mem, value, + valueTemp, offsetTemp, maskTemp); +} + +void MacroAssembler::wasmAtomicEffectOp(const wasm::MemoryAccessDesc& access, + AtomicOp op, Register value, + const BaseIndex& mem, + Register valueTemp, Register offsetTemp, + Register maskTemp) { + AtomicEffectOp(*this, &access, access.type(), access.sync(), op, mem, value, + valueTemp, offsetTemp, maskTemp); +} + +// ======================================================================== +// JS atomic operations. + +template <typename T> +static void CompareExchangeJS(MacroAssembler& masm, Scalar::Type arrayType, + const Synchronization& sync, const T& mem, + Register oldval, Register newval, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register temp, + AnyRegister output) { + if (arrayType == Scalar::Uint32) { + masm.compareExchange(arrayType, sync, mem, oldval, newval, valueTemp, + offsetTemp, maskTemp, temp); + masm.convertUInt32ToDouble(temp, output.fpu()); + } else { + masm.compareExchange(arrayType, sync, mem, oldval, newval, valueTemp, + offsetTemp, maskTemp, output.gpr()); + } +} + +void MacroAssembler::compareExchangeJS(Scalar::Type arrayType, + const Synchronization& sync, + const Address& mem, Register oldval, + Register newval, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register temp, AnyRegister output) { + CompareExchangeJS(*this, arrayType, sync, mem, oldval, newval, valueTemp, + offsetTemp, maskTemp, temp, output); +} + +void MacroAssembler::compareExchangeJS(Scalar::Type arrayType, + const Synchronization& sync, + const BaseIndex& mem, Register oldval, + Register newval, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register temp, AnyRegister output) { + CompareExchangeJS(*this, arrayType, sync, mem, oldval, newval, valueTemp, + offsetTemp, maskTemp, temp, output); +} + +template <typename T> +static void AtomicExchangeJS(MacroAssembler& masm, Scalar::Type arrayType, + const Synchronization& sync, const T& mem, + Register value, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register temp, AnyRegister output) { + if (arrayType == Scalar::Uint32) { + masm.atomicExchange(arrayType, sync, mem, value, valueTemp, offsetTemp, + maskTemp, temp); + masm.convertUInt32ToDouble(temp, output.fpu()); + } else { + masm.atomicExchange(arrayType, sync, mem, value, valueTemp, offsetTemp, + maskTemp, output.gpr()); + } +} + +void MacroAssembler::atomicExchangeJS(Scalar::Type arrayType, + const Synchronization& sync, + const Address& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register temp, + AnyRegister output) { + AtomicExchangeJS(*this, arrayType, sync, mem, value, valueTemp, offsetTemp, + maskTemp, temp, output); +} + +void MacroAssembler::atomicExchangeJS(Scalar::Type arrayType, + const Synchronization& sync, + const BaseIndex& mem, Register value, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register temp, + AnyRegister output) { + AtomicExchangeJS(*this, arrayType, sync, mem, value, valueTemp, offsetTemp, + maskTemp, temp, output); +} + +template <typename T> +static void AtomicFetchOpJS(MacroAssembler& masm, Scalar::Type arrayType, + const Synchronization& sync, AtomicOp op, + Register value, const T& mem, Register valueTemp, + Register offsetTemp, Register maskTemp, + Register temp, AnyRegister output) { + if (arrayType == Scalar::Uint32) { + masm.atomicFetchOp(arrayType, sync, op, value, mem, valueTemp, offsetTemp, + maskTemp, temp); + masm.convertUInt32ToDouble(temp, output.fpu()); + } else { + masm.atomicFetchOp(arrayType, sync, op, value, mem, valueTemp, offsetTemp, + maskTemp, output.gpr()); + } +} + +void MacroAssembler::atomicFetchOpJS(Scalar::Type arrayType, + const Synchronization& sync, AtomicOp op, + Register value, const Address& mem, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register temp, + AnyRegister output) { + AtomicFetchOpJS(*this, arrayType, sync, op, value, mem, valueTemp, offsetTemp, + maskTemp, temp, output); +} + +void MacroAssembler::atomicFetchOpJS(Scalar::Type arrayType, + const Synchronization& sync, AtomicOp op, + Register value, const BaseIndex& mem, + Register valueTemp, Register offsetTemp, + Register maskTemp, Register temp, + AnyRegister output) { + AtomicFetchOpJS(*this, arrayType, sync, op, value, mem, valueTemp, offsetTemp, + maskTemp, temp, output); +} + +void MacroAssembler::atomicEffectOpJS(Scalar::Type arrayType, + const Synchronization& sync, AtomicOp op, + Register value, const BaseIndex& mem, + Register valueTemp, Register offsetTemp, + Register maskTemp) { + AtomicEffectOp(*this, nullptr, arrayType, sync, op, mem, value, valueTemp, + offsetTemp, maskTemp); +} + +void MacroAssembler::atomicEffectOpJS(Scalar::Type arrayType, + const Synchronization& sync, AtomicOp op, + Register value, const Address& mem, + Register valueTemp, Register offsetTemp, + Register maskTemp) { + AtomicEffectOp(*this, nullptr, arrayType, sync, op, mem, value, valueTemp, + offsetTemp, maskTemp); +} + +void MacroAssembler::flexibleQuotient32(Register rhs, Register srcDest, + bool isUnsigned, + const LiveRegisterSet&) { + quotient32(rhs, srcDest, isUnsigned); +} + +void MacroAssembler::flexibleRemainder32(Register rhs, Register srcDest, + bool isUnsigned, + const LiveRegisterSet&) { + remainder32(rhs, srcDest, isUnsigned); +} + +void MacroAssembler::flexibleDivMod32(Register rhs, Register srcDest, + Register remOutput, bool isUnsigned, + const LiveRegisterSet&) { + if (isUnsigned) { +#ifdef MIPSR6 + as_divu(ScratchRegister, srcDest, rhs); + as_modu(remOutput, srcDest, rhs); + ma_move(srcDest, ScratchRegister); +#else + as_divu(srcDest, rhs); +#endif + } else { +#ifdef MIPSR6 + as_div(ScratchRegister, srcDest, rhs); + as_mod(remOutput, srcDest, rhs); + ma_move(srcDest, ScratchRegister); +#else + as_div(srcDest, rhs); +#endif + } +#ifndef MIPSR6 + as_mfhi(remOutput); + as_mflo(srcDest); +#endif +} + +CodeOffset MacroAssembler::moveNearAddressWithPatch(Register dest) { + return movWithPatch(ImmPtr(nullptr), dest); +} + +void MacroAssembler::patchNearAddressMove(CodeLocationLabel loc, + CodeLocationLabel target) { + PatchDataWithValueCheck(loc, ImmPtr(target.raw()), ImmPtr(nullptr)); +} + +// ======================================================================== +// Spectre Mitigations. + +void MacroAssembler::speculationBarrier() { MOZ_CRASH(); } + +void MacroAssembler::floorFloat32ToInt32(FloatRegister src, Register dest, + Label* fail) { + ScratchFloat32Scope scratch(*this); + + Label skipCheck, done; + + // If Nan, 0 or -0 check for bailout + loadConstantFloat32(0.0f, scratch); + ma_bc1s(src, scratch, &skipCheck, Assembler::DoubleNotEqual, ShortJump); + + // If binary value is not zero, it is NaN or -0, so we bail. + moveFromDoubleLo(src, SecondScratchReg); + branch32(Assembler::NotEqual, SecondScratchReg, Imm32(0), fail); + + // Input was zero, so return zero. + move32(Imm32(0), dest); + ma_b(&done, ShortJump); + + bind(&skipCheck); + as_floorws(scratch, src); + moveFromDoubleLo(scratch, dest); + + branch32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + branch32(Assembler::Equal, dest, Imm32(INT_MAX), fail); + + bind(&done); +} + +void MacroAssembler::floorDoubleToInt32(FloatRegister src, Register dest, + Label* fail) { + ScratchDoubleScope scratch(*this); + + Label skipCheck, done; + + // If Nan, 0 or -0 check for bailout + loadConstantDouble(0.0, scratch); + ma_bc1d(src, scratch, &skipCheck, Assembler::DoubleNotEqual, ShortJump); + + // If high part is not zero, it is NaN or -0, so we bail. + moveFromDoubleHi(src, SecondScratchReg); + branch32(Assembler::NotEqual, SecondScratchReg, Imm32(0), fail); + + // Input was zero, so return zero. + move32(Imm32(0), dest); + ma_b(&done, ShortJump); + + bind(&skipCheck); + as_floorwd(scratch, src); + moveFromDoubleLo(scratch, dest); + + branch32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + branch32(Assembler::Equal, dest, Imm32(INT_MAX), fail); + + bind(&done); +} + +void MacroAssembler::ceilFloat32ToInt32(FloatRegister src, Register dest, + Label* fail) { + ScratchFloat32Scope scratch(*this); + + Label performCeil, done; + + // If x < -1 or x > 0 then perform ceil. + loadConstantFloat32(0.0f, scratch); + branchFloat(Assembler::DoubleGreaterThan, src, scratch, &performCeil); + loadConstantFloat32(-1.0f, scratch); + branchFloat(Assembler::DoubleLessThanOrEqual, src, scratch, &performCeil); + + // If binary value is not zero, the input was not 0, so we bail. + moveFromFloat32(src, SecondScratchReg); + branch32(Assembler::NotEqual, SecondScratchReg, Imm32(0), fail); + + // Input was zero, so return zero. + move32(Imm32(0), dest); + ma_b(&done, ShortJump); + + bind(&performCeil); + as_ceilws(scratch, src); + moveFromFloat32(scratch, dest); + + branch32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + branch32(Assembler::Equal, dest, Imm32(INT_MAX), fail); + + bind(&done); +} + +void MacroAssembler::ceilDoubleToInt32(FloatRegister src, Register dest, + Label* fail) { + ScratchDoubleScope scratch(*this); + + Label performCeil, done; + + // If x < -1 or x > 0 then perform ceil. + loadConstantDouble(0, scratch); + branchDouble(Assembler::DoubleGreaterThan, src, scratch, &performCeil); + loadConstantDouble(-1, scratch); + branchDouble(Assembler::DoubleLessThanOrEqual, src, scratch, &performCeil); + + // If high part is not zero, the input was not 0, so we bail. + moveFromDoubleHi(src, SecondScratchReg); + branch32(Assembler::NotEqual, SecondScratchReg, Imm32(0), fail); + + // Input was zero, so return zero. + move32(Imm32(0), dest); + ma_b(&done, ShortJump); + + bind(&performCeil); + as_ceilwd(scratch, src); + moveFromDoubleLo(scratch, dest); + + branch32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + branch32(Assembler::Equal, dest, Imm32(INT_MAX), fail); + + bind(&done); +} + +void MacroAssembler::roundFloat32ToInt32(FloatRegister src, Register dest, + FloatRegister temp, Label* fail) { + ScratchFloat32Scope scratch(*this); + + Label negative, end, skipCheck; + + // Load biggest number less than 0.5 in the temp register. + loadConstantFloat32(GetBiggestNumberLessThan(0.5f), temp); + + // Branch to a slow path for negative inputs. Doesn't catch NaN or -0. + loadConstantFloat32(0.0f, scratch); + ma_bc1s(src, scratch, &negative, Assembler::DoubleLessThan, ShortJump); + + // If Nan, 0 or -0 check for bailout + ma_bc1s(src, scratch, &skipCheck, Assembler::DoubleNotEqual, ShortJump); + + // If binary value is not zero, it is NaN or -0, so we bail. + moveFromFloat32(src, SecondScratchReg); + branch32(Assembler::NotEqual, SecondScratchReg, Imm32(0), fail); + + // Input was zero, so return zero. + move32(Imm32(0), dest); + ma_b(&end, ShortJump); + + bind(&skipCheck); + as_adds(scratch, src, temp); + as_floorws(scratch, scratch); + + moveFromFloat32(scratch, dest); + + branchTest32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + branchTest32(Assembler::Equal, dest, Imm32(INT_MAX), fail); + + jump(&end); + + // Input is negative, but isn't -0. + bind(&negative); + + // Inputs in ]-0.5; 0] need to be added 0.5, other negative inputs need to + // be added the biggest double less than 0.5. + Label loadJoin; + loadConstantFloat32(-0.5f, scratch); + branchFloat(Assembler::DoubleLessThan, src, scratch, &loadJoin); + loadConstantFloat32(0.5f, temp); + bind(&loadJoin); + + as_adds(temp, src, temp); + + // If input + 0.5 >= 0, input is a negative number >= -0.5 and the + // result is -0. + branchFloat(Assembler::DoubleGreaterThanOrEqual, temp, scratch, fail); + + // Truncate and round toward zero. + // This is off-by-one for everything but integer-valued inputs. + as_floorws(scratch, temp); + moveFromFloat32(scratch, dest); + + branch32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + + bind(&end); +} + +void MacroAssembler::roundDoubleToInt32(FloatRegister src, Register dest, + FloatRegister temp, Label* fail) { + ScratchDoubleScope scratch(*this); + + Label negative, end, skipCheck; + + // Load biggest number less than 0.5 in the temp register. + loadConstantDouble(GetBiggestNumberLessThan(0.5), temp); + + // Branch to a slow path for negative inputs. Doesn't catch NaN or -0. + loadConstantDouble(0.0, scratch); + ma_bc1d(src, scratch, &negative, Assembler::DoubleLessThan, ShortJump); + + // If Nan, 0 or -0 check for bailout + ma_bc1d(src, scratch, &skipCheck, Assembler::DoubleNotEqual, ShortJump); + + // If high part is not zero, it is NaN or -0, so we bail. + moveFromDoubleHi(src, SecondScratchReg); + branch32(Assembler::NotEqual, SecondScratchReg, Imm32(0), fail); + + // Input was zero, so return zero. + move32(Imm32(0), dest); + ma_b(&end, ShortJump); + + bind(&skipCheck); + as_addd(scratch, src, temp); + as_floorwd(scratch, scratch); + + moveFromDoubleLo(scratch, dest); + + branch32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + branch32(Assembler::Equal, dest, Imm32(INT_MAX), fail); + + jump(&end); + + // Input is negative, but isn't -0. + bind(&negative); + + // Inputs in ]-0.5; 0] need to be added 0.5, other negative inputs need to + // be added the biggest double less than 0.5. + Label loadJoin; + loadConstantDouble(-0.5, scratch); + branchDouble(Assembler::DoubleLessThan, src, scratch, &loadJoin); + loadConstantDouble(0.5, temp); + bind(&loadJoin); + + addDouble(src, temp); + + // If input + 0.5 >= 0, input is a negative number >= -0.5 and the + // result is -0. + branchDouble(Assembler::DoubleGreaterThanOrEqual, temp, scratch, fail); + + // Truncate and round toward zero. + // This is off-by-one for everything but integer-valued inputs. + as_floorwd(scratch, temp); + moveFromDoubleLo(scratch, dest); + + branch32(Assembler::Equal, dest, Imm32(INT_MIN), fail); + + bind(&end); +} + +void MacroAssembler::truncFloat32ToInt32(FloatRegister src, Register dest, + Label* fail) { + Label notZero; + as_truncws(ScratchFloat32Reg, src); + as_cfc1(ScratchRegister, Assembler::FCSR); + moveFromFloat32(ScratchFloat32Reg, dest); + ma_ext(ScratchRegister, ScratchRegister, Assembler::CauseV, 1); + + ma_b(dest, Imm32(0), ¬Zero, Assembler::NotEqual, ShortJump); + moveFromFloat32(src, ScratchRegister); + // Check if src is in ]-1; -0] range by checking the sign bit. + as_slt(ScratchRegister, ScratchRegister, zero); + bind(¬Zero); + + branch32(Assembler::NotEqual, ScratchRegister, Imm32(0), fail); +} + +void MacroAssembler::truncDoubleToInt32(FloatRegister src, Register dest, + Label* fail) { + Label notZero; + as_truncwd(ScratchFloat32Reg, src); + as_cfc1(ScratchRegister, Assembler::FCSR); + moveFromFloat32(ScratchFloat32Reg, dest); + ma_ext(ScratchRegister, ScratchRegister, Assembler::CauseV, 1); + + ma_b(dest, Imm32(0), ¬Zero, Assembler::NotEqual, ShortJump); + moveFromDoubleHi(src, ScratchRegister); + // Check if src is in ]-1; -0] range by checking the sign bit. + as_slt(ScratchRegister, ScratchRegister, zero); + bind(¬Zero); + + branch32(Assembler::NotEqual, ScratchRegister, Imm32(0), fail); +} + +void MacroAssembler::nearbyIntDouble(RoundingMode mode, FloatRegister src, + FloatRegister dest) { + MOZ_CRASH("not supported on this platform"); +} + +void MacroAssembler::nearbyIntFloat32(RoundingMode mode, FloatRegister src, + FloatRegister dest) { + MOZ_CRASH("not supported on this platform"); +} + +void MacroAssembler::copySignDouble(FloatRegister lhs, FloatRegister rhs, + FloatRegister output) { + MOZ_CRASH("not supported on this platform"); +} + +void MacroAssembler::shiftIndex32AndAdd(Register indexTemp32, int shift, + Register pointer) { + if (IsShiftInScaleRange(shift)) { + computeEffectiveAddress( + BaseIndex(pointer, indexTemp32, ShiftToScale(shift)), pointer); + return; + } + lshift32(Imm32(shift), indexTemp32); + addPtr(indexTemp32, pointer); +} + +//}}} check_macroassembler_style diff --git a/js/src/jit/mips-shared/MacroAssembler-mips-shared.h b/js/src/jit/mips-shared/MacroAssembler-mips-shared.h new file mode 100644 index 0000000000..88238accbb --- /dev/null +++ b/js/src/jit/mips-shared/MacroAssembler-mips-shared.h @@ -0,0 +1,258 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_MacroAssembler_mips_shared_h +#define jit_mips_shared_MacroAssembler_mips_shared_h + +#if defined(JS_CODEGEN_MIPS32) +# include "jit/mips32/Assembler-mips32.h" +#elif defined(JS_CODEGEN_MIPS64) +# include "jit/mips64/Assembler-mips64.h" +#endif + +#include "jit/AtomicOp.h" + +namespace js { +namespace jit { + +enum LoadStoreSize { + SizeByte = 8, + SizeHalfWord = 16, + SizeWord = 32, + SizeDouble = 64 +}; + +enum LoadStoreExtension { ZeroExtend = 0, SignExtend = 1 }; + +enum JumpKind { LongJump = 0, ShortJump = 1 }; + +enum DelaySlotFill { DontFillDelaySlot = 0, FillDelaySlot = 1 }; + +static Register CallReg = t9; + +class MacroAssemblerMIPSShared : public Assembler { + protected: + // Perform a downcast. Should be removed by Bug 996602. + MacroAssembler& asMasm(); + const MacroAssembler& asMasm() const; + + Condition ma_cmp(Register rd, Register lhs, Register rhs, Condition c); + Condition ma_cmp(Register rd, Register lhs, Imm32 imm, Condition c); + + void compareFloatingPoint(FloatFormat fmt, FloatRegister lhs, + FloatRegister rhs, DoubleCondition c, + FloatTestKind* testKind, FPConditionBit fcc = FCC0); + + public: + void ma_move(Register rd, Register rs); + + void ma_li(Register dest, ImmGCPtr ptr); + + void ma_li(Register dest, Imm32 imm); + void ma_liPatchable(Register dest, Imm32 imm); + + // Shift operations + void ma_sll(Register rd, Register rt, Imm32 shift); + void ma_srl(Register rd, Register rt, Imm32 shift); + void ma_sra(Register rd, Register rt, Imm32 shift); + void ma_ror(Register rd, Register rt, Imm32 shift); + void ma_rol(Register rd, Register rt, Imm32 shift); + + void ma_sll(Register rd, Register rt, Register shift); + void ma_srl(Register rd, Register rt, Register shift); + void ma_sra(Register rd, Register rt, Register shift); + void ma_ror(Register rd, Register rt, Register shift); + void ma_rol(Register rd, Register rt, Register shift); + + // Negate + void ma_negu(Register rd, Register rs); + + void ma_not(Register rd, Register rs); + + // Bit extract/insert + void ma_ext(Register rt, Register rs, uint16_t pos, uint16_t size); + void ma_ins(Register rt, Register rs, uint16_t pos, uint16_t size); + + // Sign extend + void ma_seb(Register rd, Register rt); + void ma_seh(Register rd, Register rt); + + // and + void ma_and(Register rd, Register rs); + void ma_and(Register rd, Imm32 imm); + void ma_and(Register rd, Register rs, Imm32 imm); + + // or + void ma_or(Register rd, Register rs); + void ma_or(Register rd, Imm32 imm); + void ma_or(Register rd, Register rs, Imm32 imm); + + // xor + void ma_xor(Register rd, Register rs); + void ma_xor(Register rd, Imm32 imm); + void ma_xor(Register rd, Register rs, Imm32 imm); + + // word swap byte within halfwords + void ma_wsbh(Register rd, Register rt); + + void ma_ctz(Register rd, Register rs); + + // load + void ma_load(Register dest, const BaseIndex& src, + LoadStoreSize size = SizeWord, + LoadStoreExtension extension = SignExtend); + void ma_load_unaligned(Register dest, const BaseIndex& src, + LoadStoreSize size = SizeWord, + LoadStoreExtension extension = SignExtend); + void ma_load_unaligned(Register dest, const Address& address, + LoadStoreSize size = SizeWord, + LoadStoreExtension extension = SignExtend); + void ma_load_unaligned(const wasm::MemoryAccessDesc& access, Register dest, + const BaseIndex& src, Register temp, + LoadStoreSize size, LoadStoreExtension extension); + + // store + void ma_store(Register data, const BaseIndex& dest, + LoadStoreSize size = SizeWord, + LoadStoreExtension extension = SignExtend); + void ma_store(Imm32 imm, const BaseIndex& dest, LoadStoreSize size = SizeWord, + LoadStoreExtension extension = SignExtend); + void ma_store_unaligned(Register data, const Address& dest, + LoadStoreSize size = SizeWord); + void ma_store_unaligned(Register data, const BaseIndex& dest, + LoadStoreSize size = SizeWord); + void ma_store_unaligned(const wasm::MemoryAccessDesc& access, Register data, + const BaseIndex& dest, Register temp, + LoadStoreSize size, LoadStoreExtension extension); + + // arithmetic based ops + // add + void ma_addu(Register rd, Register rs, Imm32 imm); + void ma_addu(Register rd, Register rs); + void ma_addu(Register rd, Imm32 imm); + void ma_add32TestCarry(Condition cond, Register rd, Register rs, Register rt, + Label* overflow); + void ma_add32TestCarry(Condition cond, Register rd, Register rs, Imm32 imm, + Label* overflow); + + // subtract + void ma_subu(Register rd, Register rs, Imm32 imm); + void ma_subu(Register rd, Register rs); + void ma_subu(Register rd, Imm32 imm); + void ma_sub32TestOverflow(Register rd, Register rs, Imm32 imm, + Label* overflow); + + // multiplies. For now, there are only few that we care about. + void ma_mul(Register rd, Register rs, Imm32 imm); + void ma_mul32TestOverflow(Register rd, Register rs, Register rt, + Label* overflow); + void ma_mul32TestOverflow(Register rd, Register rs, Imm32 imm, + Label* overflow); + + // divisions + void ma_div_branch_overflow(Register rd, Register rs, Register rt, + Label* overflow); + void ma_div_branch_overflow(Register rd, Register rs, Imm32 imm, + Label* overflow); + + // fast mod, uses scratch registers, and thus needs to be in the assembler + // implicitly assumes that we can overwrite dest at the beginning of the + // sequence + void ma_mod_mask(Register src, Register dest, Register hold, Register remain, + int32_t shift, Label* negZero = nullptr); + + // branches when done from within mips-specific code + void ma_b(Register lhs, Register rhs, Label* l, Condition c, + JumpKind jumpKind = LongJump); + void ma_b(Register lhs, Imm32 imm, Label* l, Condition c, + JumpKind jumpKind = LongJump); + void ma_b(Register lhs, ImmPtr imm, Label* l, Condition c, + JumpKind jumpKind = LongJump); + void ma_b(Register lhs, ImmGCPtr imm, Label* l, Condition c, + JumpKind jumpKind = LongJump) { + MOZ_ASSERT(lhs != ScratchRegister); + ma_li(ScratchRegister, imm); + ma_b(lhs, ScratchRegister, l, c, jumpKind); + } + + void ma_b(Label* l, JumpKind jumpKind = LongJump); + + // fp instructions + void ma_lis(FloatRegister dest, float value); + + void ma_sd(FloatRegister src, BaseIndex address); + void ma_ss(FloatRegister src, BaseIndex address); + + void ma_ld(FloatRegister dest, const BaseIndex& src); + void ma_ls(FloatRegister dest, const BaseIndex& src); + + // FP branches + void ma_bc1s(FloatRegister lhs, FloatRegister rhs, Label* label, + DoubleCondition c, JumpKind jumpKind = LongJump, + FPConditionBit fcc = FCC0); + void ma_bc1d(FloatRegister lhs, FloatRegister rhs, Label* label, + DoubleCondition c, JumpKind jumpKind = LongJump, + FPConditionBit fcc = FCC0); + + void ma_call(ImmPtr dest); + + void ma_jump(ImmPtr dest); + + void ma_cmp_set(Register dst, Register lhs, Register rhs, Condition c); + void ma_cmp_set(Register dst, Register lhs, Imm32 imm, Condition c); + // void ma_cmp_set(Register dst, Address address, Imm32 imm, Condition c); + void ma_cmp_set_double(Register dst, FloatRegister lhs, FloatRegister rhs, + DoubleCondition c); + void ma_cmp_set_float32(Register dst, FloatRegister lhs, FloatRegister rhs, + DoubleCondition c); + + void moveToDoubleLo(Register src, FloatRegister dest) { as_mtc1(src, dest); } + void moveFromDoubleLo(FloatRegister src, Register dest) { + as_mfc1(dest, src); + } + + void moveToFloat32(Register src, FloatRegister dest) { as_mtc1(src, dest); } + void moveFromFloat32(FloatRegister src, Register dest) { as_mfc1(dest, src); } + + // Evaluate srcDest = minmax<isMax>{Float32,Double}(srcDest, other). + // Handle NaN specially if handleNaN is true. + void minMaxDouble(FloatRegister srcDest, FloatRegister other, bool handleNaN, + bool isMax); + void minMaxFloat32(FloatRegister srcDest, FloatRegister other, bool handleNaN, + bool isMax); + + void loadDouble(const Address& addr, FloatRegister dest); + void loadDouble(const BaseIndex& src, FloatRegister dest); + + // Load a float value into a register, then expand it to a double. + void loadFloatAsDouble(const Address& addr, FloatRegister dest); + void loadFloatAsDouble(const BaseIndex& src, FloatRegister dest); + + void loadFloat32(const Address& addr, FloatRegister dest); + void loadFloat32(const BaseIndex& src, FloatRegister dest); + + void outOfLineWasmTruncateToInt32Check(FloatRegister input, Register output, + MIRType fromType, TruncFlags flags, + Label* rejoin, + wasm::BytecodeOffset trapOffset); + void outOfLineWasmTruncateToInt64Check(FloatRegister input, Register64 output, + MIRType fromType, TruncFlags flags, + Label* rejoin, + wasm::BytecodeOffset trapOffset); + + protected: + void wasmLoadImpl(const wasm::MemoryAccessDesc& access, Register memoryBase, + Register ptr, Register ptrScratch, AnyRegister output, + Register tmp); + void wasmStoreImpl(const wasm::MemoryAccessDesc& access, AnyRegister value, + Register memoryBase, Register ptr, Register ptrScratch, + Register tmp); +}; + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_MacroAssembler_mips_shared_h */ diff --git a/js/src/jit/mips-shared/MoveEmitter-mips-shared.cpp b/js/src/jit/mips-shared/MoveEmitter-mips-shared.cpp new file mode 100644 index 0000000000..5ea8f0b8de --- /dev/null +++ b/js/src/jit/mips-shared/MoveEmitter-mips-shared.cpp @@ -0,0 +1,207 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/mips-shared/MoveEmitter-mips-shared.h" + +#include "jit/MacroAssembler-inl.h" + +using namespace js; +using namespace js::jit; + +void MoveEmitterMIPSShared::emit(const MoveResolver& moves) { + if (moves.numCycles()) { + // Reserve stack for cycle resolution + static_assert(SpillSlotSize == 8); + masm.reserveStack(moves.numCycles() * SpillSlotSize); + pushedAtCycle_ = masm.framePushed(); + } + + for (size_t i = 0; i < moves.numMoves(); i++) { + emit(moves.getMove(i)); + } +} + +Address MoveEmitterMIPSShared::cycleSlot(uint32_t slot, + uint32_t subslot) const { + int32_t offset = masm.framePushed() - pushedAtCycle_; + MOZ_ASSERT(Imm16::IsInSignedRange(offset)); + return Address(StackPointer, offset + slot * sizeof(double) + subslot); +} + +int32_t MoveEmitterMIPSShared::getAdjustedOffset(const MoveOperand& operand) { + MOZ_ASSERT(operand.isMemoryOrEffectiveAddress()); + if (operand.base() != StackPointer) { + return operand.disp(); + } + + // Adjust offset if stack pointer has been moved. + return operand.disp() + masm.framePushed() - pushedAtStart_; +} + +Address MoveEmitterMIPSShared::getAdjustedAddress(const MoveOperand& operand) { + return Address(operand.base(), getAdjustedOffset(operand)); +} + +Register MoveEmitterMIPSShared::tempReg() { + spilledReg_ = SecondScratchReg; + return SecondScratchReg; +} + +void MoveEmitterMIPSShared::emitMove(const MoveOperand& from, + const MoveOperand& to) { + if (from.isGeneralReg()) { + // Second scratch register should not be moved by MoveEmitter. + MOZ_ASSERT(from.reg() != spilledReg_); + + if (to.isGeneralReg()) { + masm.movePtr(from.reg(), to.reg()); + } else if (to.isMemory()) { + masm.storePtr(from.reg(), getAdjustedAddress(to)); + } else { + MOZ_CRASH("Invalid emitMove arguments."); + } + } else if (from.isMemory()) { + if (to.isGeneralReg()) { + masm.loadPtr(getAdjustedAddress(from), to.reg()); + } else if (to.isMemory()) { + masm.loadPtr(getAdjustedAddress(from), tempReg()); + masm.storePtr(tempReg(), getAdjustedAddress(to)); + } else { + MOZ_CRASH("Invalid emitMove arguments."); + } + } else if (from.isEffectiveAddress()) { + if (to.isGeneralReg()) { + masm.computeEffectiveAddress(getAdjustedAddress(from), to.reg()); + } else if (to.isMemory()) { + masm.computeEffectiveAddress(getAdjustedAddress(from), tempReg()); + masm.storePtr(tempReg(), getAdjustedAddress(to)); + } else { + MOZ_CRASH("Invalid emitMove arguments."); + } + } else { + MOZ_CRASH("Invalid emitMove arguments."); + } +} + +void MoveEmitterMIPSShared::emitInt32Move(const MoveOperand& from, + const MoveOperand& to) { + if (from.isGeneralReg()) { + // Second scratch register should not be moved by MoveEmitter. + MOZ_ASSERT(from.reg() != spilledReg_); + + if (to.isGeneralReg()) { + masm.move32(from.reg(), to.reg()); + } else if (to.isMemory()) { + masm.store32(from.reg(), getAdjustedAddress(to)); + } else { + MOZ_CRASH("Invalid emitInt32Move arguments."); + } + } else if (from.isMemory()) { + if (to.isGeneralReg()) { + masm.load32(getAdjustedAddress(from), to.reg()); + } else if (to.isMemory()) { + masm.load32(getAdjustedAddress(from), tempReg()); + masm.store32(tempReg(), getAdjustedAddress(to)); + } else { + MOZ_CRASH("Invalid emitInt32Move arguments."); + } + } else if (from.isEffectiveAddress()) { + if (to.isGeneralReg()) { + masm.computeEffectiveAddress(getAdjustedAddress(from), to.reg()); + } else if (to.isMemory()) { + masm.computeEffectiveAddress(getAdjustedAddress(from), tempReg()); + masm.store32(tempReg(), getAdjustedAddress(to)); + } else { + MOZ_CRASH("Invalid emitInt32Move arguments."); + } + } else { + MOZ_CRASH("Invalid emitInt32Move arguments."); + } +} + +void MoveEmitterMIPSShared::emitFloat32Move(const MoveOperand& from, + const MoveOperand& to) { + // Ensure that we can use ScratchFloat32Reg in memory move. + MOZ_ASSERT_IF(from.isFloatReg(), from.floatReg() != ScratchFloat32Reg); + MOZ_ASSERT_IF(to.isFloatReg(), to.floatReg() != ScratchFloat32Reg); + + if (from.isFloatReg()) { + if (to.isFloatReg()) { + masm.moveFloat32(from.floatReg(), to.floatReg()); + } else if (to.isGeneralReg()) { + // This should only be used when passing float parameter in a1,a2,a3 + MOZ_ASSERT(to.reg() == a1 || to.reg() == a2 || to.reg() == a3); + masm.moveFromFloat32(from.floatReg(), to.reg()); + } else { + MOZ_ASSERT(to.isMemory()); + masm.storeFloat32(from.floatReg(), getAdjustedAddress(to)); + } + } else if (to.isFloatReg()) { + MOZ_ASSERT(from.isMemory()); + masm.loadFloat32(getAdjustedAddress(from), to.floatReg()); + } else if (to.isGeneralReg()) { + MOZ_ASSERT(from.isMemory()); + // This should only be used when passing float parameter in a1,a2,a3 + MOZ_ASSERT(to.reg() == a1 || to.reg() == a2 || to.reg() == a3); + masm.loadPtr(getAdjustedAddress(from), to.reg()); + } else { + MOZ_ASSERT(from.isMemory()); + MOZ_ASSERT(to.isMemory()); + masm.loadFloat32(getAdjustedAddress(from), ScratchFloat32Reg); + masm.storeFloat32(ScratchFloat32Reg, getAdjustedAddress(to)); + } +} + +void MoveEmitterMIPSShared::emit(const MoveOp& move) { + const MoveOperand& from = move.from(); + const MoveOperand& to = move.to(); + + if (move.isCycleEnd() && move.isCycleBegin()) { + // A fun consequence of aliased registers is you can have multiple + // cycles at once, and one can end exactly where another begins. + breakCycle(from, to, move.endCycleType(), move.cycleBeginSlot()); + completeCycle(from, to, move.type(), move.cycleEndSlot()); + return; + } + + if (move.isCycleEnd()) { + MOZ_ASSERT(inCycle_); + completeCycle(from, to, move.type(), move.cycleEndSlot()); + MOZ_ASSERT(inCycle_ > 0); + inCycle_--; + return; + } + + if (move.isCycleBegin()) { + breakCycle(from, to, move.endCycleType(), move.cycleBeginSlot()); + inCycle_++; + } + + switch (move.type()) { + case MoveOp::FLOAT32: + emitFloat32Move(from, to); + break; + case MoveOp::DOUBLE: + emitDoubleMove(from, to); + break; + case MoveOp::INT32: + emitInt32Move(from, to); + break; + case MoveOp::GENERAL: + emitMove(from, to); + break; + default: + MOZ_CRASH("Unexpected move type"); + } +} + +void MoveEmitterMIPSShared::assertDone() { MOZ_ASSERT(inCycle_ == 0); } + +void MoveEmitterMIPSShared::finish() { + assertDone(); + + masm.freeStack(masm.framePushed() - pushedAtStart_); +} diff --git a/js/src/jit/mips-shared/MoveEmitter-mips-shared.h b/js/src/jit/mips-shared/MoveEmitter-mips-shared.h new file mode 100644 index 0000000000..81dbaddc45 --- /dev/null +++ b/js/src/jit/mips-shared/MoveEmitter-mips-shared.h @@ -0,0 +1,73 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_MoveEmitter_mips_shared_h +#define jit_mips_shared_MoveEmitter_mips_shared_h + +#include "jit/MacroAssembler.h" +#include "jit/MoveResolver.h" + +namespace js { +namespace jit { + +class MoveEmitterMIPSShared { + protected: + uint32_t inCycle_; + MacroAssembler& masm; + + // Original stack push value. + uint32_t pushedAtStart_; + + // These store stack offsets to spill locations, snapshotting + // codegen->framePushed_ at the time they were allocated. They are -1 if no + // stack space has been allocated for that particular spill. + int32_t pushedAtCycle_; + int32_t pushedAtSpill_; + + // These are registers that are available for temporary use. They may be + // assigned InvalidReg. If no corresponding spill space has been assigned, + // then these registers do not need to be spilled. + Register spilledReg_; + FloatRegister spilledFloatReg_; + + void assertDone(); + Register tempReg(); + FloatRegister tempFloatReg(); + Address cycleSlot(uint32_t slot, uint32_t subslot = 0) const; + int32_t getAdjustedOffset(const MoveOperand& operand); + Address getAdjustedAddress(const MoveOperand& operand); + + void emitMove(const MoveOperand& from, const MoveOperand& to); + void emitInt32Move(const MoveOperand& from, const MoveOperand& to); + void emitFloat32Move(const MoveOperand& from, const MoveOperand& to); + virtual void emitDoubleMove(const MoveOperand& from, + const MoveOperand& to) = 0; + virtual void breakCycle(const MoveOperand& from, const MoveOperand& to, + MoveOp::Type type, uint32_t slot) = 0; + virtual void completeCycle(const MoveOperand& from, const MoveOperand& to, + MoveOp::Type type, uint32_t slot) = 0; + void emit(const MoveOp& move); + + public: + MoveEmitterMIPSShared(MacroAssembler& masm) + : inCycle_(0), + masm(masm), + pushedAtStart_(masm.framePushed()), + pushedAtCycle_(-1), + pushedAtSpill_(-1), + spilledReg_(InvalidReg), + spilledFloatReg_(InvalidFloatReg) {} + ~MoveEmitterMIPSShared() { assertDone(); } + void emit(const MoveResolver& moves); + void finish(); + + void setScratchRegister(Register reg) {} +}; + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_MoveEmitter_mips_shared_h */ diff --git a/js/src/jit/mips-shared/SharedICHelpers-mips-shared-inl.h b/js/src/jit/mips-shared/SharedICHelpers-mips-shared-inl.h new file mode 100644 index 0000000000..cee021595f --- /dev/null +++ b/js/src/jit/mips-shared/SharedICHelpers-mips-shared-inl.h @@ -0,0 +1,82 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_SharedICHelpers_mips_shared_inl_h +#define jit_mips_shared_SharedICHelpers_mips_shared_inl_h + +#include "jit/BaselineFrame.h" +#include "jit/SharedICHelpers.h" + +#include "jit/MacroAssembler-inl.h" + +namespace js { +namespace jit { + +inline void EmitBaselineTailCallVM(TrampolinePtr target, MacroAssembler& masm, + uint32_t argSize) { +#ifdef DEBUG + Register scratch = R2.scratchReg(); + + // Compute frame size. + masm.movePtr(FramePointer, scratch); + masm.subPtr(StackPointer, scratch); + + // Store frame size without VMFunction arguments for debug assertions. + masm.subPtr(Imm32(argSize), scratch); + Address frameSizeAddr(FramePointer, + BaselineFrame::reverseOffsetOfDebugFrameSize()); + masm.store32(scratch, frameSizeAddr); + masm.addPtr(Imm32(argSize), scratch); +#endif + + // Push frame descriptor and perform the tail call. + // ICTailCallReg (ra) already contains the return address (as we + // keep it there through the stub calls), but the VMWrapper code being + // called expects the return address to also be pushed on the stack. + MOZ_ASSERT(ICTailCallReg == ra); + masm.pushFrameDescriptor(FrameType::BaselineJS); + masm.push(ra); + masm.jump(target); +} + +inline void EmitBaselineCallVM(TrampolinePtr target, MacroAssembler& masm) { + masm.pushFrameDescriptor(FrameType::BaselineStub); + masm.call(target); +} + +inline void EmitBaselineEnterStubFrame(MacroAssembler& masm, Register scratch) { + MOZ_ASSERT(scratch != ICTailCallReg); + +#ifdef DEBUG + // Compute frame size. + masm.movePtr(FramePointer, scratch); + masm.subPtr(StackPointer, scratch); + + Address frameSizeAddr(FramePointer, + BaselineFrame::reverseOffsetOfDebugFrameSize()); + masm.store32(scratch, frameSizeAddr); +#endif + + // Note: when making changes here, don't forget to update + // BaselineStubFrame if needed. + + // Push frame descriptor and return address. + masm.PushFrameDescriptor(FrameType::BaselineJS); + masm.Push(ICTailCallReg); + + // Save old frame pointer, stack pointer and stub reg. + masm.Push(FramePointer); + masm.movePtr(StackPointer, FramePointer); + masm.Push(ICStubReg); + + // Stack should remain aligned. + masm.assertStackAlignment(sizeof(Value), 0); +} + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_SharedICHelpers_mips_shared_inl_h */ diff --git a/js/src/jit/mips-shared/SharedICHelpers-mips-shared.h b/js/src/jit/mips-shared/SharedICHelpers-mips-shared.h new file mode 100644 index 0000000000..979e4b0a42 --- /dev/null +++ b/js/src/jit/mips-shared/SharedICHelpers-mips-shared.h @@ -0,0 +1,88 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips_shared_SharedICHelpers_mips_shared_h +#define jit_mips_shared_SharedICHelpers_mips_shared_h + +#include "jit/BaselineIC.h" +#include "jit/JitFrames.h" +#include "jit/MacroAssembler.h" +#include "jit/SharedICRegisters.h" + +namespace js { +namespace jit { + +// Distance from sp to the top Value inside an IC stub (no return address on +// the stack on MIPS). +static const size_t ICStackValueOffset = 0; + +struct BaselineStubFrame { + uintptr_t savedFrame; + uintptr_t savedStub; + uintptr_t returnAddress; + uintptr_t descriptor; +}; + +inline void EmitRestoreTailCallReg(MacroAssembler& masm) { + // No-op on MIPS because ra register is always holding the return address. +} + +inline void EmitRepushTailCallReg(MacroAssembler& masm) { + // No-op on MIPS because ra register is always holding the return address. +} + +inline void EmitCallIC(MacroAssembler& masm, CodeOffset* callOffset) { + // The stub pointer must already be in ICStubReg. + // Load stubcode pointer from the ICStub. + // R2 won't be active when we call ICs, so we can use it as scratch. + masm.loadPtr(Address(ICStubReg, ICStub::offsetOfStubCode()), R2.scratchReg()); + + // Call the stubcode via a direct jump-and-link + masm.call(R2.scratchReg()); + *callOffset = CodeOffset(masm.currentOffset()); +} + +inline void EmitReturnFromIC(MacroAssembler& masm) { masm.branch(ra); } + +inline void EmitBaselineLeaveStubFrame(MacroAssembler& masm) { + masm.loadPtr( + Address(FramePointer, BaselineStubFrameLayout::ICStubOffsetFromFP), + ICStubReg); + masm.movePtr(FramePointer, StackPointer); + masm.Pop(FramePointer); + + // Load the return address. + masm.Pop(ICTailCallReg); + + // Discard the frame descriptor. + { + SecondScratchRegisterScope scratch2(masm); + masm.Pop(scratch2); + } +} + +template <typename AddrType> +inline void EmitPreBarrier(MacroAssembler& masm, const AddrType& addr, + MIRType type) { + // On MIPS, $ra is clobbered by guardedCallPreBarrier. Save it first. + masm.push(ra); + masm.guardedCallPreBarrier(addr, type); + masm.pop(ra); +} + +inline void EmitStubGuardFailure(MacroAssembler& masm) { + // Load next stub into ICStubReg + masm.loadPtr(Address(ICStubReg, ICCacheIRStub::offsetOfNext()), ICStubReg); + + // Return address is already loaded, just jump to the next stubcode. + MOZ_ASSERT(ICTailCallReg == ra); + masm.jump(Address(ICStubReg, ICStub::offsetOfStubCode())); +} + +} // namespace jit +} // namespace js + +#endif /* jit_mips_shared_SharedICHelpers_mips_shared_h */ |