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[IonMonkey] MIPS: Import small optimizations from load & store

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This commit is contained in:
Jiaxun Yang 2020-05-12 12:40:06 +08:00 • committed by Roy Tam
commit 90144c967f
1 changed files with 17 additions and 4 deletions
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21
js/src/jit/mips64/MacroAssembler-mips64.cpp
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@ -869,6 +869,10 @@ MacroAssemblerMIPS64::branchWithCode(InstImm code, Label* label, JumpKind jumpKi
void
MacroAssemblerMIPS64::ma_cmp_set(Register rd, Register rs, ImmWord imm, Condition c)
{
if (imm.value == 0) {
ma_cmp_set(rd, rs, zero, c);
return;
}
ma_li(ScratchRegister, imm);
ma_cmp_set(rd, rs, ScratchRegister, c);
}
@ -886,6 +890,10 @@ MacroAssemblerMIPS64::ma_lid(FloatRegister dest, double value)
{
ImmWord imm(mozilla::BitwiseCast<uint64_t>(value));
if (imm.value == 0) {
moveToDouble(zero, dest);
return;
}
ma_li(ScratchRegister, imm);
moveToDouble(ScratchRegister, dest);
}
@ -1288,6 +1296,10 @@ MacroAssemblerMIPS64Compat::store32(Register src, const Address& address)
void
MacroAssemblerMIPS64Compat::store32(Imm32 src, const Address& address)
{
if (src.value == 0) {
ma_store(zero, address, SizeWord);
return;
}
move32(src, SecondScratchReg);
ma_store(SecondScratchReg, address, SizeWord);
}
@ -2060,9 +2072,9 @@ MacroAssemblerMIPS64Compat::handleFailureWithHandlerTail(void* handler)
loadPtr(Address(StackPointer, offsetof(ResumeFromException, stackPointer)), StackPointer);
// We're going to be returning by the ion calling convention
ma_pop(ra);
as_ld(ra, StackPointer, 0);
as_jr(ra);
as_nop();
as_daddiu(StackPointer, StackPointer, sizeof(intptr_t)); // in delay slot.
// If we found a catch handler, this must be a baseline frame. Restore
// state and jump to the catch block.
@ -2084,8 +2096,9 @@ MacroAssemblerMIPS64Compat::handleFailureWithHandlerTail(void* handler)
loadPtr(Address(sp, offsetof(ResumeFromException, stackPointer)), sp);
pushValue(BooleanValue(true));
pushValue(exception);
jump(a0);
as_daddiu(StackPointer, StackPointer, -sizeof(intptr_t));
as_jr(a0);
as_sd(exception.valueReg(), StackPointer, 0); // In delay slot
// Only used in debug mode. Return BaselineFrame->returnValue() to the
// caller.