path: root/js/src/jit/x64/MacroAssembler-x64-inl.h

/* -*- 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_x64_MacroAssembler_x64_inl_h
#define jit_x64_MacroAssembler_x64_inl_h

#include "jit/x64/MacroAssembler-x64.h"

#include "jit/x86-shared/MacroAssembler-x86-shared-inl.h"

namespace js {
namespace jit {

//{{{ check_macroassembler_style
// ===============================================================

void MacroAssembler::move64(Imm64 imm, Register64 dest) {
  // Use mov instead of movq because it has special optimizations for imm == 0.
  mov(ImmWord(imm.value), dest.reg);
}

void MacroAssembler::move64(Register64 src, Register64 dest) {
  movq(src.reg, dest.reg);
}

void MacroAssembler::moveDoubleToGPR64(FloatRegister src, Register64 dest) {
  vmovq(src, dest.reg);
}

void MacroAssembler::moveGPR64ToDouble(Register64 src, FloatRegister dest) {
  vmovq(src.reg, dest);
}

void MacroAssembler::move64To32(Register64 src, Register dest) {
  movl(src.reg, dest);
}

void MacroAssembler::move32To64ZeroExtend(Register src, Register64 dest) {
  movl(src, dest.reg);
}

void MacroAssembler::move8To64SignExtend(Register src, Register64 dest) {
  movsbq(Operand(src), dest.reg);
}

void MacroAssembler::move16To64SignExtend(Register src, Register64 dest) {
  movswq(Operand(src), dest.reg);
}

void MacroAssembler::move32To64SignExtend(Register src, Register64 dest) {
  movslq(src, dest.reg);
}

void MacroAssembler::move32SignExtendToPtr(Register src, Register dest) {
  movslq(src, dest);
}

void MacroAssembler::move32ZeroExtendToPtr(Register src, Register dest) {
  movl(src, dest);
}

// ===============================================================
// Load instructions

void MacroAssembler::load32SignExtendToPtr(const Address& src, Register dest) {
  movslq(Operand(src), dest);
}

// ===============================================================
// Logical instructions

void MacroAssembler::notPtr(Register reg) { notq(reg); }

void MacroAssembler::andPtr(Register src, Register dest) { andq(src, dest); }

void MacroAssembler::andPtr(Imm32 imm, Register dest) { andq(imm, dest); }

void MacroAssembler::and64(Imm64 imm, Register64 dest) {
  if (INT32_MIN <= int64_t(imm.value) && int64_t(imm.value) <= INT32_MAX) {
    andq(Imm32(imm.value), dest.reg);
  } else {
    ScratchRegisterScope scratch(*this);
    movq(ImmWord(uintptr_t(imm.value)), scratch);
    andq(scratch, dest.reg);
  }
}

void MacroAssembler::or64(Imm64 imm, Register64 dest) {
  if (INT32_MIN <= int64_t(imm.value) && int64_t(imm.value) <= INT32_MAX) {
    orq(Imm32(imm.value), dest.reg);
  } else {
    ScratchRegisterScope scratch(*this);
    movq(ImmWord(uintptr_t(imm.value)), scratch);
    orq(scratch, dest.reg);
  }
}

void MacroAssembler::xor64(Imm64 imm, Register64 dest) {
  if (INT32_MIN <= int64_t(imm.value) && int64_t(imm.value) <= INT32_MAX) {
    xorq(Imm32(imm.value), dest.reg);
  } else {
    ScratchRegisterScope scratch(*this);
    movq(ImmWord(uintptr_t(imm.value)), scratch);
    xorq(scratch, dest.reg);
  }
}

void MacroAssembler::orPtr(Register src, Register dest) { orq(src, dest); }

void MacroAssembler::orPtr(Imm32 imm, Register dest) { orq(imm, dest); }

void MacroAssembler::and64(Register64 src, Register64 dest) {
  andq(src.reg, dest.reg);
}

void MacroAssembler::or64(Register64 src, Register64 dest) {
  orq(src.reg, dest.reg);
}

void MacroAssembler::xor64(Register64 src, Register64 dest) {
  xorq(src.reg, dest.reg);
}

void MacroAssembler::xorPtr(Register src, Register dest) { xorq(src, dest); }

void MacroAssembler::xorPtr(Imm32 imm, Register dest) { xorq(imm, dest); }

void MacroAssembler::and64(const Operand& src, Register64 dest) {
  andq(src, dest.reg);
}

void MacroAssembler::or64(const Operand& src, Register64 dest) {
  orq(src, dest.reg);
}

void MacroAssembler::xor64(const Operand& src, Register64 dest) {
  xorq(src, dest.reg);
}

// ===============================================================
// Swap instructions

void MacroAssembler::byteSwap64(Register64 reg) { bswapq(reg.reg); }

// ===============================================================
// Arithmetic functions

void MacroAssembler::addPtr(Register src, Register dest) { addq(src, dest); }

void MacroAssembler::addPtr(Imm32 imm, Register dest) { addq(imm, dest); }

void MacroAssembler::addPtr(ImmWord imm, Register dest) {
  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(dest != scratch);
  if ((intptr_t)imm.value <= INT32_MAX && (intptr_t)imm.value >= INT32_MIN) {
    addq(Imm32((int32_t)imm.value), dest);
  } else {
    mov(imm, scratch);
    addq(scratch, dest);
  }
}

void MacroAssembler::addPtr(Imm32 imm, const Address& dest) {
  addq(imm, Operand(dest));
}

void MacroAssembler::addPtr(Imm32 imm, const AbsoluteAddress& dest) {
  addq(imm, Operand(dest));
}

void MacroAssembler::addPtr(const Address& src, Register dest) {
  addq(Operand(src), dest);
}

void MacroAssembler::add64(const Operand& src, Register64 dest) {
  addq(src, dest.reg);
}

void MacroAssembler::add64(Register64 src, Register64 dest) {
  addq(src.reg, dest.reg);
}

void MacroAssembler::add64(Imm32 imm, Register64 dest) { addq(imm, dest.reg); }

void MacroAssembler::add64(Imm64 imm, Register64 dest) {
  addPtr(ImmWord(imm.value), dest.reg);
}

CodeOffset MacroAssembler::sub32FromStackPtrWithPatch(Register dest) {
  moveStackPtrTo(dest);
  addqWithPatch(Imm32(0), dest);
  return CodeOffset(currentOffset());
}

void MacroAssembler::patchSub32FromStackPtr(CodeOffset offset, Imm32 imm) {
  patchAddq(offset, -imm.value);
}

void MacroAssembler::subPtr(Register src, Register dest) { subq(src, dest); }

void MacroAssembler::subPtr(Register src, const Address& dest) {
  subq(src, Operand(dest));
}

void MacroAssembler::subPtr(Imm32 imm, Register dest) { subq(imm, dest); }

void MacroAssembler::subPtr(ImmWord imm, Register dest) {
  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(dest != scratch);
  if ((intptr_t)imm.value <= INT32_MAX && (intptr_t)imm.value >= INT32_MIN) {
    subq(Imm32((int32_t)imm.value), dest);
  } else {
    mov(imm, scratch);
    subq(scratch, dest);
  }
}

void MacroAssembler::subPtr(const Address& addr, Register dest) {
  subq(Operand(addr), dest);
}

void MacroAssembler::sub64(const Operand& src, Register64 dest) {
  subq(src, dest.reg);
}

void MacroAssembler::sub64(Register64 src, Register64 dest) {
  subq(src.reg, dest.reg);
}

void MacroAssembler::sub64(Imm64 imm, Register64 dest) {
  subPtr(ImmWord(imm.value), dest.reg);
}

void MacroAssembler::mulHighUnsigned32(Imm32 imm, Register src, Register dest) {
  // To compute the unsigned multiplication using imulq, we have to ensure both
  // operands don't have any bits set in the high word.

  if (imm.value >= 0) {
    // Clear the high word of |src|.
    movl(src, src);

    // |imm| and |src| are both positive, so directly perform imulq.
    imulq(imm, src, dest);
  } else {
    // Store the low word of |src| into |dest|.
    movl(src, dest);

    // Compute the unsigned value of |imm| before performing imulq.
    movl(imm, ScratchReg);
    imulq(ScratchReg, dest);
  }

  // Move the high word into |dest|.
  shrq(Imm32(32), dest);
}

void MacroAssembler::mulPtr(Register rhs, Register srcDest) {
  imulq(rhs, srcDest);
}

void MacroAssembler::mul64(Imm64 imm, const Register64& dest,
                           const Register temp) {
  MOZ_ASSERT(temp == InvalidReg);
  mul64(imm, dest);
}

void MacroAssembler::mul64(Imm64 imm, const Register64& dest) {
  if (INT32_MIN <= int64_t(imm.value) && int64_t(imm.value) <= INT32_MAX) {
    imulq(Imm32((int32_t)imm.value), dest.reg, dest.reg);
  } else {
    movq(ImmWord(uintptr_t(imm.value)), ScratchReg);
    imulq(ScratchReg, dest.reg);
  }
}

void MacroAssembler::mul64(const Register64& src, const Register64& dest,
                           const Register temp) {
  MOZ_ASSERT(temp == InvalidReg);
  mul64(Operand(src.reg), dest);
}

void MacroAssembler::mul64(const Operand& src, const Register64& dest) {
  imulq(src, dest.reg);
}

void MacroAssembler::mul64(const Operand& src, const Register64& dest,
                           const Register temp) {
  MOZ_ASSERT(temp == InvalidReg);
  mul64(src, dest);
}

void MacroAssembler::mulBy3(Register src, Register dest) {
  lea(Operand(src, src, TimesTwo), dest);
}

void MacroAssembler::mulDoublePtr(ImmPtr imm, Register temp,
                                  FloatRegister dest) {
  movq(imm, ScratchReg);
  vmulsd(Operand(ScratchReg, 0), dest, dest);
}

void MacroAssembler::inc64(AbsoluteAddress dest) {
  if (X86Encoding::IsAddressImmediate(dest.addr)) {
    addPtr(Imm32(1), dest);
  } else {
    ScratchRegisterScope scratch(*this);
    mov(ImmPtr(dest.addr), scratch);
    addPtr(Imm32(1), Address(scratch, 0));
  }
}

void MacroAssembler::neg64(Register64 reg) { negq(reg.reg); }

void MacroAssembler::negPtr(Register reg) { negq(reg); }

// ===============================================================
// Shift functions

void MacroAssembler::lshiftPtr(Imm32 imm, Register dest) {
  MOZ_ASSERT(0 <= imm.value && imm.value < 64);
  shlq(imm, dest);
}

void MacroAssembler::lshiftPtr(Register shift, Register srcDest) {
  if (Assembler::HasBMI2()) {
    shlxq(srcDest, shift, srcDest);
    return;
  }
  MOZ_ASSERT(shift == rcx);
  shlq_cl(srcDest);
}

void MacroAssembler::lshift64(Imm32 imm, Register64 dest) {
  MOZ_ASSERT(0 <= imm.value && imm.value < 64);
  lshiftPtr(imm, dest.reg);
}

void MacroAssembler::lshift64(Register shift, Register64 srcDest) {
  if (Assembler::HasBMI2()) {
    shlxq(srcDest.reg, shift, srcDest.reg);
    return;
  }
  MOZ_ASSERT(shift == rcx);
  shlq_cl(srcDest.reg);
}

void MacroAssembler::rshiftPtr(Imm32 imm, Register dest) {
  MOZ_ASSERT(0 <= imm.value && imm.value < 64);
  shrq(imm, dest);
}

void MacroAssembler::rshiftPtr(Register shift, Register srcDest) {
  if (Assembler::HasBMI2()) {
    shrxq(srcDest, shift, srcDest);
    return;
  }
  MOZ_ASSERT(shift == rcx);
  shrq_cl(srcDest);
}

void MacroAssembler::rshift64(Imm32 imm, Register64 dest) {
  rshiftPtr(imm, dest.reg);
}

void MacroAssembler::rshift64(Register shift, Register64 srcDest) {
  if (Assembler::HasBMI2()) {
    shrxq(srcDest.reg, shift, srcDest.reg);
    return;
  }
  MOZ_ASSERT(shift == rcx);
  shrq_cl(srcDest.reg);
}

void MacroAssembler::rshiftPtrArithmetic(Imm32 imm, Register dest) {
  MOZ_ASSERT(0 <= imm.value && imm.value < 64);
  sarq(imm, dest);
}

void MacroAssembler::rshift64Arithmetic(Imm32 imm, Register64 dest) {
  MOZ_ASSERT(0 <= imm.value && imm.value < 64);
  rshiftPtrArithmetic(imm, dest.reg);
}

void MacroAssembler::rshift64Arithmetic(Register shift, Register64 srcDest) {
  if (Assembler::HasBMI2()) {
    sarxq(srcDest.reg, shift, srcDest.reg);
    return;
  }
  MOZ_ASSERT(shift == rcx);
  sarq_cl(srcDest.reg);
}

// ===============================================================
// Rotation functions

void MacroAssembler::rotateLeft64(Register count, Register64 src,
                                  Register64 dest) {
  MOZ_ASSERT(src == dest, "defineReuseInput");
  MOZ_ASSERT(count == ecx, "defineFixed(ecx)");

  rolq_cl(dest.reg);
}

void MacroAssembler::rotateLeft64(Register count, Register64 src,
                                  Register64 dest, Register temp) {
  MOZ_ASSERT(temp == InvalidReg);
  rotateLeft64(count, src, dest);
}

void MacroAssembler::rotateRight64(Register count, Register64 src,
                                   Register64 dest) {
  MOZ_ASSERT(src == dest, "defineReuseInput");
  MOZ_ASSERT(count == ecx, "defineFixed(ecx)");

  rorq_cl(dest.reg);
}

void MacroAssembler::rotateRight64(Register count, Register64 src,
                                   Register64 dest, Register temp) {
  MOZ_ASSERT(temp == InvalidReg);
  rotateRight64(count, src, dest);
}

void MacroAssembler::rotateLeft64(Imm32 count, Register64 src,
                                  Register64 dest) {
  MOZ_ASSERT(src == dest, "defineReuseInput");
  rolq(count, dest.reg);
}

void MacroAssembler::rotateLeft64(Imm32 count, Register64 src, Register64 dest,
                                  Register temp) {
  MOZ_ASSERT(temp == InvalidReg);
  rotateLeft64(count, src, dest);
}

void MacroAssembler::rotateRight64(Imm32 count, Register64 src,
                                   Register64 dest) {
  MOZ_ASSERT(src == dest, "defineReuseInput");
  rorq(count, dest.reg);
}

void MacroAssembler::rotateRight64(Imm32 count, Register64 src, Register64 dest,
                                   Register temp) {
  MOZ_ASSERT(temp == InvalidReg);
  rotateRight64(count, src, dest);
}

// ===============================================================
// Condition functions

void MacroAssembler::cmp64Set(Condition cond, Address lhs, Imm64 rhs,
                              Register dest) {
  cmpPtrSet(cond, lhs, ImmWord(static_cast<uintptr_t>(rhs.value)), dest);
}

template <typename T1, typename T2>
void MacroAssembler::cmpPtrSet(Condition cond, T1 lhs, T2 rhs, Register dest) {
  cmpPtr(lhs, rhs);
  emitSet(cond, dest);
}

// ===============================================================
// Bit counting functions

void MacroAssembler::clz64(Register64 src, Register dest) {
  if (AssemblerX86Shared::HasLZCNT()) {
    lzcntq(src.reg, dest);
    return;
  }

  Label nonzero;
  bsrq(src.reg, dest);
  j(Assembler::NonZero, &nonzero);
  movq(ImmWord(0x7F), dest);
  bind(&nonzero);
  xorq(Imm32(0x3F), dest);
}

void MacroAssembler::ctz64(Register64 src, Register dest) {
  if (AssemblerX86Shared::HasBMI1()) {
    tzcntq(src.reg, dest);
    return;
  }

  Label nonzero;
  bsfq(src.reg, dest);
  j(Assembler::NonZero, &nonzero);
  movq(ImmWord(64), dest);
  bind(&nonzero);
}

void MacroAssembler::popcnt64(Register64 src64, Register64 dest64,
                              Register tmp) {
  Register src = src64.reg;
  Register dest = dest64.reg;

  if (AssemblerX86Shared::HasPOPCNT()) {
    MOZ_ASSERT(tmp == InvalidReg);
    popcntq(src, dest);
    return;
  }

  if (src != dest) {
    movq(src, dest);
  }

  MOZ_ASSERT(tmp != dest);

  ScratchRegisterScope scratch(*this);

  // Equivalent to mozilla::CountPopulation32, adapted for 64 bits.
  // x -= (x >> 1) & m1;
  movq(src, tmp);
  movq(ImmWord(0x5555555555555555), scratch);
  shrq(Imm32(1), tmp);
  andq(scratch, tmp);
  subq(tmp, dest);

  // x = (x & m2) + ((x >> 2) & m2);
  movq(dest, tmp);
  movq(ImmWord(0x3333333333333333), scratch);
  andq(scratch, dest);
  shrq(Imm32(2), tmp);
  andq(scratch, tmp);
  addq(tmp, dest);

  // x = (x + (x >> 4)) & m4;
  movq(dest, tmp);
  movq(ImmWord(0x0f0f0f0f0f0f0f0f), scratch);
  shrq(Imm32(4), tmp);
  addq(tmp, dest);
  andq(scratch, dest);

  // (x * h01) >> 56
  movq(ImmWord(0x0101010101010101), scratch);
  imulq(scratch, dest);
  shrq(Imm32(56), dest);
}

// ===============================================================
// Branch functions

void MacroAssembler::branch32(Condition cond, const AbsoluteAddress& lhs,
                              Register rhs, Label* label) {
  if (X86Encoding::IsAddressImmediate(lhs.addr)) {
    branch32(cond, Operand(lhs), rhs, label);
  } else {
    ScratchRegisterScope scratch(*this);
    mov(ImmPtr(lhs.addr), scratch);
    branch32(cond, Address(scratch, 0), rhs, label);
  }
}
void MacroAssembler::branch32(Condition cond, const AbsoluteAddress& lhs,
                              Imm32 rhs, Label* label) {
  if (X86Encoding::IsAddressImmediate(lhs.addr)) {
    branch32(cond, Operand(lhs), rhs, label);
  } else {
    ScratchRegisterScope scratch(*this);
    mov(ImmPtr(lhs.addr), scratch);
    branch32(cond, Address(scratch, 0), rhs, label);
  }
}

void MacroAssembler::branch32(Condition cond, wasm::SymbolicAddress lhs,
                              Imm32 rhs, Label* label) {
  ScratchRegisterScope scratch(*this);
  mov(lhs, scratch);
  branch32(cond, Address(scratch, 0), rhs, label);
}

void MacroAssembler::branch64(Condition cond, Register64 lhs, Imm64 val,
                              Label* success, Label* fail) {
  MOZ_ASSERT(cond == Assembler::NotEqual || cond == Assembler::Equal ||
                 cond == Assembler::LessThan ||
                 cond == Assembler::LessThanOrEqual ||
                 cond == Assembler::GreaterThan ||
                 cond == Assembler::GreaterThanOrEqual ||
                 cond == Assembler::Below || cond == Assembler::BelowOrEqual ||
                 cond == Assembler::Above || cond == Assembler::AboveOrEqual,
             "other condition codes not supported");

  branchPtr(cond, lhs.reg, ImmWord(val.value), success);
  if (fail) {
    jump(fail);
  }
}

void MacroAssembler::branch64(Condition cond, Register64 lhs, Register64 rhs,
                              Label* success, Label* fail) {
  MOZ_ASSERT(cond == Assembler::NotEqual || cond == Assembler::Equal ||
                 cond == Assembler::LessThan ||
                 cond == Assembler::LessThanOrEqual ||
                 cond == Assembler::GreaterThan ||
                 cond == Assembler::GreaterThanOrEqual ||
                 cond == Assembler::Below || cond == Assembler::BelowOrEqual ||
                 cond == Assembler::Above || cond == Assembler::AboveOrEqual,
             "other condition codes not supported");

  branchPtr(cond, lhs.reg, rhs.reg, success);
  if (fail) {
    jump(fail);
  }
}

void MacroAssembler::branch64(Condition cond, const Address& lhs, Imm64 val,
                              Label* label) {
  MOZ_ASSERT(cond == Assembler::NotEqual || cond == Assembler::Equal,
             "other condition codes not supported");

  branchPtr(cond, lhs, ImmWord(val.value), label);
}

void MacroAssembler::branch64(Condition cond, const Address& lhs,
                              Register64 rhs, Label* label) {
  MOZ_ASSERT(cond == Assembler::NotEqual || cond == Assembler::Equal,
             "other condition codes not supported");

  branchPtr(cond, lhs, rhs.reg, label);
}

void MacroAssembler::branch64(Condition cond, const Address& lhs,
                              const Address& rhs, Register scratch,
                              Label* label) {
  MOZ_ASSERT(cond == Assembler::NotEqual || cond == Assembler::Equal,
             "other condition codes not supported");
  MOZ_ASSERT(lhs.base != scratch);
  MOZ_ASSERT(rhs.base != scratch);

  loadPtr(rhs, scratch);
  branchPtr(cond, lhs, scratch, label);
}

void MacroAssembler::branchPtr(Condition cond, const AbsoluteAddress& lhs,
                               Register rhs, Label* label) {
  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(rhs != scratch);
  if (X86Encoding::IsAddressImmediate(lhs.addr)) {
    branchPtrImpl(cond, Operand(lhs), rhs, label);
  } else {
    mov(ImmPtr(lhs.addr), scratch);
    branchPtrImpl(cond, Operand(scratch, 0x0), rhs, label);
  }
}

void MacroAssembler::branchPtr(Condition cond, const AbsoluteAddress& lhs,
                               ImmWord rhs, Label* label) {
  if (X86Encoding::IsAddressImmediate(lhs.addr)) {
    branchPtrImpl(cond, Operand(lhs), rhs, label);
  } else {
    ScratchRegisterScope scratch(*this);
    mov(ImmPtr(lhs.addr), scratch);
    branchPtrImpl(cond, Operand(scratch, 0x0), rhs, label);
  }
}

void MacroAssembler::branchPtr(Condition cond, wasm::SymbolicAddress lhs,
                               Register rhs, Label* label) {
  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(rhs != scratch);
  mov(lhs, scratch);
  branchPtrImpl(cond, Operand(scratch, 0x0), rhs, label);
}

void MacroAssembler::branchPrivatePtr(Condition cond, const Address& lhs,
                                      Register rhs, Label* label) {
  branchPtr(cond, lhs, rhs, label);
}

void MacroAssembler::branchTruncateFloat32ToPtr(FloatRegister src,
                                                Register dest, Label* fail) {
  vcvttss2sq(src, dest);

  // Same trick as for Doubles
  cmpPtr(dest, Imm32(1));
  j(Assembler::Overflow, fail);
}

void MacroAssembler::branchTruncateFloat32MaybeModUint32(FloatRegister src,
                                                         Register dest,
                                                         Label* fail) {
  branchTruncateFloat32ToPtr(src, dest, fail);
  movl(dest, dest);  // Zero upper 32-bits.
}

void MacroAssembler::branchTruncateFloat32ToInt32(FloatRegister src,
                                                  Register dest, Label* fail) {
  branchTruncateFloat32ToPtr(src, dest, fail);

  // Check that the result is in the int32_t range.
  ScratchRegisterScope scratch(*this);
  move32To64SignExtend(dest, Register64(scratch));
  cmpPtr(dest, scratch);
  j(Assembler::NotEqual, fail);

  movl(dest, dest);  // Zero upper 32-bits.
}

void MacroAssembler::branchTruncateDoubleToPtr(FloatRegister src, Register dest,
                                               Label* fail) {
  vcvttsd2sq(src, dest);

  // vcvttsd2sq returns 0x8000000000000000 on failure. Test for it by
  // subtracting 1 and testing overflow (this avoids the need to
  // materialize that value in a register).
  cmpPtr(dest, Imm32(1));
  j(Assembler::Overflow, fail);
}

void MacroAssembler::branchTruncateDoubleMaybeModUint32(FloatRegister src,
                                                        Register dest,
                                                        Label* fail) {
  branchTruncateDoubleToPtr(src, dest, fail);
  movl(dest, dest);  // Zero upper 32-bits.
}

void MacroAssembler::branchTruncateDoubleToInt32(FloatRegister src,
                                                 Register dest, Label* fail) {
  branchTruncateDoubleToPtr(src, dest, fail);

  // Check that the result is in the int32_t range.
  ScratchRegisterScope scratch(*this);
  move32To64SignExtend(dest, Register64(scratch));
  cmpPtr(dest, scratch);
  j(Assembler::NotEqual, fail);

  movl(dest, dest);  // Zero upper 32-bits.
}

void MacroAssembler::branchTest32(Condition cond, const AbsoluteAddress& lhs,
                                  Imm32 rhs, Label* label) {
  if (X86Encoding::IsAddressImmediate(lhs.addr)) {
    test32(Operand(lhs), rhs);
  } else {
    ScratchRegisterScope scratch(*this);
    mov(ImmPtr(lhs.addr), scratch);
    test32(Operand(scratch, 0), rhs);
  }
  j(cond, label);
}

template <class L>
void MacroAssembler::branchTest64(Condition cond, Register64 lhs,
                                  Register64 rhs, Register temp, L label) {
  branchTestPtr(cond, lhs.reg, rhs.reg, label);
}

void MacroAssembler::branchTestBooleanTruthy(bool truthy,
                                             const ValueOperand& value,
                                             Label* label) {
  test32(value.valueReg(), value.valueReg());
  j(truthy ? NonZero : Zero, label);
}

void MacroAssembler::branchTestMagic(Condition cond, const Address& valaddr,
                                     JSWhyMagic why, Label* label) {
  uint64_t magic = MagicValue(why).asRawBits();
  cmpPtr(valaddr, ImmWord(magic));
  j(cond, label);
}

void MacroAssembler::branchTestValue(Condition cond, const BaseIndex& lhs,
                                     const ValueOperand& rhs, Label* label) {
  MOZ_ASSERT(cond == Assembler::Equal || cond == Assembler::NotEqual);
  branchPtr(cond, lhs, rhs.valueReg(), label);
}

void MacroAssembler::branchToComputedAddress(const BaseIndex& address) {
  jmp(Operand(address));
}

void MacroAssembler::cmpPtrMovePtr(Condition cond, Register lhs, Register rhs,
                                   Register src, Register dest) {
  cmpPtr(lhs, rhs);
  cmovCCq(cond, src, dest);
}

void MacroAssembler::cmpPtrMovePtr(Condition cond, Register lhs,
                                   const Address& rhs, Register src,
                                   Register dest) {
  cmpPtr(lhs, Operand(rhs));
  cmovCCq(cond, src, dest);
}

void MacroAssembler::cmp32MovePtr(Condition cond, Register lhs, Imm32 rhs,
                                  Register src, Register dest) {
  cmp32(lhs, rhs);
  cmovCCq(cond, Operand(src), dest);
}

void MacroAssembler::cmp32LoadPtr(Condition cond, const Address& lhs, Imm32 rhs,
                                  const Address& src, Register dest) {
  cmp32(lhs, rhs);
  cmovCCq(cond, Operand(src), dest);
}

void MacroAssembler::test32LoadPtr(Condition cond, const Address& addr,
                                   Imm32 mask, const Address& src,
                                   Register dest) {
  MOZ_ASSERT(cond == Assembler::Zero || cond == Assembler::NonZero);
  test32(addr, mask);
  cmovCCq(cond, Operand(src), dest);
}

void MacroAssembler::test32MovePtr(Condition cond, const Address& addr,
                                   Imm32 mask, Register src, Register dest) {
  MOZ_ASSERT(cond == Assembler::Zero || cond == Assembler::NonZero);
  test32(addr, mask);
  cmovCCq(cond, Operand(src), dest);
}

void MacroAssembler::spectreMovePtr(Condition cond, Register src,
                                    Register dest) {
  cmovCCq(cond, Operand(src), dest);
}

void MacroAssembler::spectreBoundsCheck32(Register index, Register length,
                                          Register maybeScratch,
                                          Label* failure) {
  MOZ_ASSERT(length != maybeScratch);
  MOZ_ASSERT(index != maybeScratch);

  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(index != scratch);
  MOZ_ASSERT(length != scratch);

  if (JitOptions.spectreIndexMasking) {
    move32(Imm32(0), scratch);
  }

  cmp32(index, length);
  j(Assembler::AboveOrEqual, failure);

  if (JitOptions.spectreIndexMasking) {
    cmovCCl(Assembler::AboveOrEqual, scratch, index);
  }
}

void MacroAssembler::spectreBoundsCheck32(Register index, const Address& length,
                                          Register maybeScratch,
                                          Label* failure) {
  MOZ_ASSERT(index != length.base);
  MOZ_ASSERT(length.base != maybeScratch);
  MOZ_ASSERT(index != maybeScratch);

  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(index != scratch);
  MOZ_ASSERT(length.base != scratch);

  if (JitOptions.spectreIndexMasking) {
    move32(Imm32(0), scratch);
  }

  cmp32(index, Operand(length));
  j(Assembler::AboveOrEqual, failure);

  if (JitOptions.spectreIndexMasking) {
    cmovCCl(Assembler::AboveOrEqual, scratch, index);
  }
}

void MacroAssembler::spectreBoundsCheckPtr(Register index, Register length,
                                           Register maybeScratch,
                                           Label* failure) {
  MOZ_ASSERT(length != maybeScratch);
  MOZ_ASSERT(index != maybeScratch);

  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(index != scratch);
  MOZ_ASSERT(length != scratch);

  if (JitOptions.spectreIndexMasking) {
    movePtr(ImmWord(0), scratch);
  }

  cmpPtr(index, length);
  j(Assembler::AboveOrEqual, failure);

  if (JitOptions.spectreIndexMasking) {
    cmovCCq(Assembler::AboveOrEqual, scratch, index);
  }
}

void MacroAssembler::spectreBoundsCheckPtr(Register index,
                                           const Address& length,
                                           Register maybeScratch,
                                           Label* failure) {
  MOZ_ASSERT(index != length.base);
  MOZ_ASSERT(length.base != maybeScratch);
  MOZ_ASSERT(index != maybeScratch);

  ScratchRegisterScope scratch(*this);
  MOZ_ASSERT(index != scratch);
  MOZ_ASSERT(length.base != scratch);

  if (JitOptions.spectreIndexMasking) {
    movePtr(ImmWord(0), scratch);
  }

  cmpPtr(index, Operand(length));
  j(Assembler::AboveOrEqual, failure);

  if (JitOptions.spectreIndexMasking) {
    cmovCCq(Assembler::AboveOrEqual, scratch, index);
  }
}

// ========================================================================
// SIMD.

// Extract lane as scalar

void MacroAssembler::extractLaneInt64x2(uint32_t lane, FloatRegister src,
                                        Register64 dest) {
  if (lane == 0) {
    vmovq(src, dest.reg);
  } else {
    vpextrq(lane, src, dest.reg);
  }
}

// Replace lane value

void MacroAssembler::replaceLaneInt64x2(unsigned lane, Register64 rhs,
                                        FloatRegister lhsDest) {
  vpinsrq(lane, rhs.reg, lhsDest, lhsDest);
}

void MacroAssembler::replaceLaneInt64x2(unsigned lane, FloatRegister lhs,
                                        Register64 rhs, FloatRegister dest) {
  vpinsrq(lane, rhs.reg, lhs, dest);
}

// Splat

void MacroAssembler::splatX2(Register64 src, FloatRegister dest) {
  vmovq(src.reg, dest);
  if (HasAVX2()) {
    vbroadcastq(Operand(dest), dest);
  } else {
    vpunpcklqdq(dest, dest, dest);
  }
}

// ========================================================================
// Truncate floating point.

void MacroAssembler::truncateFloat32ToUInt64(Address src, Address dest,
                                             Register temp,
                                             FloatRegister floatTemp) {
  Label done;

  loadFloat32(src, floatTemp);

  truncateFloat32ToInt64(src, dest, temp);

  // For unsigned conversion the case of [INT64, UINT64] needs to get handled
  // separately.
  loadPtr(dest, temp);
  branchPtr(Assembler::Condition::NotSigned, temp, Imm32(0), &done);

  // Move the value inside INT64 range.
  storeFloat32(floatTemp, dest);
  loadConstantFloat32(double(int64_t(0x8000000000000000)), floatTemp);
  vaddss(Operand(dest), floatTemp, floatTemp);
  storeFloat32(floatTemp, dest);
  truncateFloat32ToInt64(dest, dest, temp);

  loadPtr(dest, temp);
  or64(Imm64(0x8000000000000000), Register64(temp));
  storePtr(temp, dest);

  bind(&done);
}

void MacroAssembler::truncateDoubleToUInt64(Address src, Address dest,
                                            Register temp,
                                            FloatRegister floatTemp) {
  Label done;

  loadDouble(src, floatTemp);

  truncateDoubleToInt64(src, dest, temp);

  // For unsigned conversion the case of [INT64, UINT64] needs to get handle
  // seperately.
  loadPtr(dest, temp);
  branchPtr(Assembler::Condition::NotSigned, temp, Imm32(0), &done);

  // Move the value inside INT64 range.
  storeDouble(floatTemp, dest);
  loadConstantDouble(double(int64_t(0x8000000000000000)), floatTemp);
  vaddsd(Operand(dest), floatTemp, floatTemp);
  storeDouble(floatTemp, dest);
  truncateDoubleToInt64(dest, dest, temp);

  loadPtr(dest, temp);
  or64(Imm64(0x8000000000000000), Register64(temp));
  storePtr(temp, dest);

  bind(&done);
}

void MacroAssemblerX64::fallibleUnboxPtrImpl(const Operand& src, Register dest,
                                             JSValueType type, Label* fail) {
  MOZ_ASSERT(type == JSVAL_TYPE_OBJECT || type == JSVAL_TYPE_STRING ||
             type == JSVAL_TYPE_SYMBOL || type == JSVAL_TYPE_BIGINT);
  // dest := src XOR mask
  // scratch := dest >> JSVAL_TAG_SHIFT
  // fail if scratch != 0
  //
  // Note: src and dest can be the same register.
  ScratchRegisterScope scratch(asMasm());
  mov(ImmWord(JSVAL_TYPE_TO_SHIFTED_TAG(type)), scratch);
  xorq(src, scratch);
  mov(scratch, dest);
  shrq(Imm32(JSVAL_TAG_SHIFT), scratch);
  j(Assembler::NonZero, fail);
}

void MacroAssembler::fallibleUnboxPtr(const ValueOperand& src, Register dest,
                                      JSValueType type, Label* fail) {
  fallibleUnboxPtrImpl(Operand(src.valueReg()), dest, type, fail);
}

void MacroAssembler::fallibleUnboxPtr(const Address& src, Register dest,
                                      JSValueType type, Label* fail) {
  fallibleUnboxPtrImpl(Operand(src), dest, type, fail);
}

void MacroAssembler::fallibleUnboxPtr(const BaseIndex& src, Register dest,
                                      JSValueType type, Label* fail) {
  fallibleUnboxPtrImpl(Operand(src), dest, type, fail);
}

//}}} check_macroassembler_style
// ===============================================================

void MacroAssemblerX64::incrementInt32Value(const Address& addr) {
  asMasm().addPtr(Imm32(1), addr);
}

void MacroAssemblerX64::unboxValue(const ValueOperand& src, AnyRegister dest,
                                   JSValueType type) {
  if (dest.isFloat()) {
    Label notInt32, end;
    asMasm().branchTestInt32(Assembler::NotEqual, src, &notInt32);
    convertInt32ToDouble(src.valueReg(), dest.fpu());
    jump(&end);
    bind(&notInt32);
    unboxDouble(src, dest.fpu());
    bind(&end);
  } else {
    unboxNonDouble(src, dest.gpr(), type);
  }
}

template <typename T>
void MacroAssemblerX64::loadInt32OrDouble(const T& src, FloatRegister dest) {
  Label notInt32, end;
  asMasm().branchTestInt32(Assembler::NotEqual, src, &notInt32);
  convertInt32ToDouble(src, dest);
  jump(&end);
  bind(&notInt32);
  unboxDouble(src, dest);
  bind(&end);
}

// If source is a double, load it into dest. If source is int32,
// convert it to double. Else, branch to failure.
void MacroAssemblerX64::ensureDouble(const ValueOperand& source,
                                     FloatRegister dest, Label* failure) {
  Label isDouble, done;
  {
    ScratchTagScope tag(asMasm(), source);
    splitTagForTest(source, tag);
    asMasm().branchTestDouble(Assembler::Equal, tag, &isDouble);
    asMasm().branchTestInt32(Assembler::NotEqual, tag, failure);
  }

  {
    ScratchRegisterScope scratch(asMasm());
    unboxInt32(source, scratch);
    convertInt32ToDouble(scratch, dest);
  }
  jump(&done);

  bind(&isDouble);
  unboxDouble(source, dest);

  bind(&done);
}

}  // namespace jit
}  // namespace js

#endif /* jit_x64_MacroAssembler_x64_inl_h */