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JitArm64: Optimize carry behavior of srawix.

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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21
Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
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@ -595,17 +595,24 @@ void JitArm64::srawix(UGeckoInstruction inst)
gpr.BindToRegister(a, a == s);
ARM64Reg RA = gpr.R(a);
ARM64Reg RS = gpr.R(s);
ARM64Reg WA = gpr.GetReg();
ARM64Reg WA;
ORR(WA, WSP, RS, ArithOption(RS, ST_LSL, 32 - amount));
if (js.op->wantsCA)
{
WA = gpr.GetReg();
ORR(WA, WSP, RS, ArithOption(RS, ST_LSL, 32 - amount));
}
ORR(RA, WSP, RS, ArithOption(RS, ST_ASR, amount));
if (inst.Rc)
ComputeRC(RA, 0);
ANDS(WSP, WA, RA);
CSINC(WA, WSP, WSP, CC_EQ);
STRB(INDEX_UNSIGNED, WA, PPC_REG, PPCSTATE_OFF(xer_ca));
gpr.Unlock(WA);
if (js.op->wantsCA)
{
ANDS(WSP, WA, RA);
CSINC(WA, WSP, WSP, CC_EQ);
STRB(INDEX_UNSIGNED, WA, PPC_REG, PPCSTATE_OFF(xer_ca));
gpr.Unlock(WA);
}
}
else
{
@ -613,7 +620,7 @@ void JitArm64::srawix(UGeckoInstruction inst)
ARM64Reg RA = gpr.R(a);
ARM64Reg RS = gpr.R(s);
MOV(RA, RS);
STRB(INDEX_UNSIGNED, WSP, PPC_REG, PPCSTATE_OFF(xer_ca));
ComputeCarry(false);
}
}