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JitArm64: Optimize carry behavior of srawix.

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This commit is contained in:
degasus 2016-10-27 21:41:58 +02:00
parent 0d78f5926f
commit 3405f5ac1a
1 changed files with 14 additions and 7 deletions
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11
Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
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@ -595,25 +595,32 @@ void JitArm64::srawix(UGeckoInstruction inst)
gpr.BindToRegister(a, a == s); gpr.BindToRegister(a, a == s);
ARM64Reg RA = gpr.R(a); ARM64Reg RA = gpr.R(a);
ARM64Reg RS = gpr.R(s); ARM64Reg RS = gpr.R(s);
ARM64Reg WA = gpr.GetReg(); ARM64Reg WA;
if (js.op->wantsCA)
{
WA = gpr.GetReg();
ORR(WA, WSP, RS, ArithOption(RS, ST_LSL, 32 - amount)); ORR(WA, WSP, RS, ArithOption(RS, ST_LSL, 32 - amount));
}
ORR(RA, WSP, RS, ArithOption(RS, ST_ASR, amount)); ORR(RA, WSP, RS, ArithOption(RS, ST_ASR, amount));
if (inst.Rc) if (inst.Rc)
ComputeRC(RA, 0); ComputeRC(RA, 0);
if (js.op->wantsCA)
{
ANDS(WSP, WA, RA); ANDS(WSP, WA, RA);
CSINC(WA, WSP, WSP, CC_EQ); CSINC(WA, WSP, WSP, CC_EQ);
STRB(INDEX_UNSIGNED, WA, PPC_REG, PPCSTATE_OFF(xer_ca)); STRB(INDEX_UNSIGNED, WA, PPC_REG, PPCSTATE_OFF(xer_ca));
gpr.Unlock(WA); gpr.Unlock(WA);
} }
}
else else
{ {
gpr.BindToRegister(a, a == s); gpr.BindToRegister(a, a == s);
ARM64Reg RA = gpr.R(a); ARM64Reg RA = gpr.R(a);
ARM64Reg RS = gpr.R(s); ARM64Reg RS = gpr.R(s);
MOV(RA, RS); MOV(RA, RS);
STRB(INDEX_UNSIGNED, WSP, PPC_REG, PPCSTATE_OFF(xer_ca)); ComputeCarry(false);
} }
} }