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JitArm64: optimize addzex

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So on the general case, we don't need a tempory register.
This commit is contained in:
degasus 2015-08-13 13:40:17 +02:00
commit 4ef2962055
1 changed files with 15 additions and 5 deletions
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20
Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
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@ -680,11 +680,21 @@ void JitArm64::addzex(UGeckoInstruction inst)
int a = inst.RA, d = inst.RD; int a = inst.RA, d = inst.RD;
gpr.BindToRegister(d, d == a); if (d == a)
ARM64Reg WA = gpr.GetReg(); {
LDRB(INDEX_UNSIGNED, WA, X29, PPCSTATE_OFF(xer_ca)); gpr.BindToRegister(d, true);
ADDS(gpr.R(d), gpr.R(a), WA); ARM64Reg WA = gpr.GetReg();
gpr.Unlock(WA); LDRB(INDEX_UNSIGNED, WA, X29, PPCSTATE_OFF(xer_ca));
ADDS(gpr.R(d), gpr.R(a), WA);
gpr.Unlock(WA);
}
else
{
gpr.BindToRegister(d, false);
LDRB(INDEX_UNSIGNED, gpr.R(d), X29, PPCSTATE_OFF(xer_ca));
ADDS(gpr.R(d), gpr.R(a), gpr.R(d));
}
ComputeCarry(); ComputeCarry();
if (inst.Rc) if (inst.Rc)
ComputeRC(gpr.R(d), 0); ComputeRC(gpr.R(d), 0);