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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* 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::Code
FloatRegisters::FromName(const char* name)
{
for (size_t i = 0; i < Total; i++) {
if (strcmp(GetName(i), name) == 0)
return Code(i);
}
return Invalid;
}
FloatRegister
FloatRegister::doubleOverlay(unsigned int which) const
{
MOZ_ASSERT(!isInvalid());
if (kind_ != Double)
return FloatRegister(code_ & ~1, Double);
return *this;
}
FloatRegister
FloatRegister::singleOverlay(unsigned int which) const
{
MOZ_ASSERT(!isInvalid());
if (kind_ == Double) {
// Only even registers are double
MOZ_ASSERT(code_ % 2 == 0);
MOZ_ASSERT(which < 2);
return FloatRegister(code_ + which, Single);
}
MOZ_ASSERT(which == 0);
return FloatRegister(code_, Single);
}
FloatRegisterSet
FloatRegister::ReduceSetForPush(const FloatRegisterSet& s)
{
LiveFloatRegisterSet mod;
for (FloatRegisterIterator iter(s); iter.more(); ++iter) {
if ((*iter).isSingle()) {
// Even for single size registers save complete double register.
mod.addUnchecked((*iter).doubleOverlay());
} else {
mod.addUnchecked(*iter);
}
}
return mod.set();
}
uint32_t
FloatRegister::GetPushSizeInBytes(const FloatRegisterSet& s)
{
FloatRegisterSet ss = s.reduceSetForPush();
uint64_t bits = ss.bits();
// We are only pushing double registers.
MOZ_ASSERT((bits & 0xffffffff) == 0);
uint32_t ret = mozilla::CountPopulation32(bits >> 32) * sizeof(double);
return ret;
}
uint32_t
FloatRegister::getRegisterDumpOffsetInBytes()
{
if (isSingle())
return id() * sizeof(float);
if (isDouble())
return id() * sizeof(double);
MOZ_CRASH();
}
} // namespace ion
} // namespace js
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