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Bug 1424978 - IonMonkey: MIPS: Fix ma_addTestCarry

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Tag: #1542
This commit is contained in:
Jiaxun Yang 2020-05-12 12:40:10 +08:00 • committed by Roy Tam
commit ac720c2a42
1 changed files with 8 additions and 2 deletions
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10
js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp
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@ -236,8 +236,14 @@ template <typename L>
void
MacroAssemblerMIPSShared::ma_addTestCarry(Register rd, Register rs, Register rt, L overflow)
{
as_addu(rd, rs, rt);
as_sltu(SecondScratchReg, rd, rs);
if (rd != rs) {
as_addu(rd, rs, rt);
as_sltu(SecondScratchReg, rd, rs);
} else {
ma_move(SecondScratchReg, rs);
as_addu(rd, rs, rt);
as_sltu(SecondScratchReg, rd, SecondScratchReg);
}
ma_b(SecondScratchReg, SecondScratchReg, overflow, Assembler::NonZero);
}