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samplerjit: Small AVX optimization to modulate.

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Only gives about 0.5% but it's still something.
This commit is contained in:
Unknown W. Brackets 2021-12-31 08:10:04 -08:00
parent 244b0a86f6
commit fc3688d273
1 changed files with 17 additions and 6 deletions
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23
GPU/Software/SamplerX86.cpp
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@ -803,11 +803,18 @@ bool SamplerJitCache::Jit_ApplyTextureFunc(const SamplerID &id) {
case GE_TEXFUNC_MODULATE:
Describe("Modulate");
PACKSSDW(primColorReg, R(primColorReg));
MOVDQA(tempReg, M(constOnes16_));
PADDW(tempReg, R(primColorReg));
if (cpu_info.bAVX) {
VPADDW(128, tempReg, primColorReg, M(constOnes16_));
// Okay, time to multiply. This produces 16 bits, neatly.
VPMULLW(128, resultReg, tempReg, R(resultReg));
} else {
MOVDQA(tempReg, M(constOnes16_));
PADDW(tempReg, R(primColorReg));
PMULLW(resultReg, R(tempReg));
}
// Okay, time to multiply. This produces 16 bits, neatly.
PMULLW(resultReg, R(tempReg));
if (id.useColorDoubling)
PSRLW(resultReg, 7);
else
@ -817,8 +824,12 @@ bool SamplerJitCache::Jit_ApplyTextureFunc(const SamplerID &id) {
useAlphaFrom(primColorReg);
} else if (id.useColorDoubling) {
// We still need to finish dividing alpha, it's currently doubled (from the 7 above.)
MOVDQA(primColorReg, R(resultReg));
PSRLW(primColorReg, 1);
if (cpu_info.bAVX) {
VPSRLW(128, primColorReg, resultReg, 1);
} else {
MOVDQA(primColorReg, R(resultReg));
PSRLW(primColorReg, 1);
}
useAlphaFrom(primColorReg);
}
break;