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/* -*- 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/mips32/Architecture-mips32.h"
#include "jit/RegisterSets.h"
namespace js {
namespace jit {
const char* const Registers::RegNames[] = {
"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3", "t0", "t1", "t2",
"t3", "t4", "t5", "t6", "t7", "s0", "s1", "s2", "s3", "s4", "s5",
"s6", "s7", "t8", "t9", "k0", "k1", "gp", "sp", "fp", "ra"};
const uint32_t Allocatable = 14;
const Registers::SetType Registers::ArgRegMask = Registers::SharedArgRegMask;
const Registers::SetType Registers::JSCallMask =
(1 << Registers::a2) | (1 << Registers::a3);
const Registers::SetType Registers::CallMask =
(1 << Registers::v0) |
(1 << Registers::v1); // used for double-size returns
FloatRegisters::Encoding FloatRegisters::FromName(const char* name) {
for (size_t i = 0; i < RegisterIdLimit; i++) {
if (strcmp(GetName(i), name) == 0) {
return Encoding(i);
}
}
return Invalid;
}
FloatRegister FloatRegister::doubleOverlay() const {
MOZ_ASSERT(isNotOdd());
if (isSingle()) {
return FloatRegister(code_, Double);
}
return *this;
}
FloatRegister FloatRegister::singleOverlay() const {
MOZ_ASSERT(isNotOdd());
if (isDouble()) {
return FloatRegister(code_, Single);
}
return *this;
}
FloatRegisterSet FloatRegister::ReduceSetForPush(const FloatRegisterSet& s) {
#ifdef ENABLE_WASM_SIMD
# error "Needs more careful logic if SIMD is enabled"
#endif
LiveFloatRegisterSet mod;
for (FloatRegisterIterator iter(s); iter.more(); ++iter) {
// Even for single size registers save complete double register.
mod.addUnchecked((*iter).doubleOverlay());
}
return mod.set();
}
uint32_t FloatRegister::GetPushSizeInBytes(const FloatRegisterSet& s) {
#ifdef ENABLE_WASM_SIMD
# error "Needs more careful logic if SIMD is enabled"
#endif
FloatRegisterSet ss = s.reduceSetForPush();
uint64_t bits = ss.bits();
// We are only pushing double registers.
MOZ_ASSERT((bits & 0xFFFF) == 0);
uint32_t ret = mozilla::CountPopulation32(bits) * sizeof(double);
// Additional space needed by MacroAssembler::PushRegsInMask to ensure
// correct alignment of double values.
if (ret) {
ret += sizeof(double);
}
return ret;
}
uint32_t FloatRegister::getRegisterDumpOffsetInBytes() {
MOZ_ASSERT(isNotOdd());
return id() * sizeof(float);
}
} // namespace jit
} // namespace js
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