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Merge pull request #12891 from Sintendo/jitarm64-subfic 

JitArm64_Integer: Optimize subfic for zero
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Tilka 2024-08-04 23:27:40 +01:00 committed by GitHub
parent c824ee9758 d877cfa4e2
commit bc72226668
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GPG Key ID: B5690EEEBB952194
1 changed files with 10 additions and 4 deletions
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14
Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
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@ -1392,13 +1392,19 @@ void JitArm64::subfic(UGeckoInstruction inst)
}
else
{
const bool allocate_reg = d == a;
gpr.BindToRegister(d, allocate_reg);
const bool will_read = d == a;
const bool is_zero = imm == 0;
const bool allocate_reg = will_read && !is_zero;
gpr.BindToRegister(d, will_read);
// d = imm - a
ARM64Reg RD = gpr.R(d);
ARM64Reg WA = allocate_reg ? gpr.GetReg() : RD;
MOVI2R(WA, imm);
ARM64Reg WA = ARM64Reg::WZR;
if (!is_zero)
{
WA = will_read ? gpr.GetReg() : RD;
MOVI2R(WA, imm);
}
CARRY_IF_NEEDED(SUB, SUBS, RD, WA, gpr.R(a));
if (allocate_reg)