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softjit: Reduce ditherMatrix to 8-bit.

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Oops, not sure why I made it 16 bit.
This commit is contained in:
Unknown W. Brackets 2021-12-01 19:31:29 -08:00
parent 1c5615624a
commit aec41b34d6
2 changed files with 5 additions and 6 deletions
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9
GPU/Software/DrawPixelX86.cpp
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@ -1382,19 +1382,18 @@ bool PixelJitCache::Jit_Dither(const PixelFuncID &id) {
MOVSX(32, 8, valueReg, R(valueReg));
SAR(8, R(valueReg), Imm8(4));
#else
// Sum up (x + y * 4) * 2 + ditherMatrix offset to valueReg.
SHL(32, R(argXReg), Imm8(1));
LEA(32, valueReg, MComplex(argXReg, valueReg, 8, offsetof(PixelFuncID, cached.ditherMatrix)));
// Sum up (x + y * 4) + ditherMatrix offset to valueReg.
LEA(32, valueReg, MComplex(argXReg, valueReg, 4, offsetof(PixelFuncID, cached.ditherMatrix)));
// Okay, now abuse argXReg to read the PixelFuncID pointer on the stack.
if (regCache_.Has(RegCache::GEN_ARG_ID)) {
X64Reg idReg = regCache_.Find(RegCache::GEN_ARG_ID);
MOVSX(32, 16, valueReg, MRegSum(idReg, valueReg));
MOVSX(32, 8, valueReg, MRegSum(idReg, valueReg));
regCache_.Unlock(idReg, RegCache::GEN_ARG_ID);
} else {
_assert_(stackIDOffset_ != -1);
MOV(PTRBITS, R(argXReg), MDisp(RSP, stackIDOffset_));
MOVSX(32, 16, valueReg, MRegSum(argXReg, valueReg));
MOVSX(32, 8, valueReg, MRegSum(argXReg, valueReg));
}
#endif
if (argXReg != INVALID_REG) {

2
GPU/Software/FuncId.h
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@ -35,7 +35,7 @@ struct PixelFuncID {
struct {
// Warning: these are not hashed or compared for equal. Just cached values.
uint32_t colorWriteMask{};
int16_t ditherMatrix[16]{};
int8_t ditherMatrix[16]{};
} cached;
#endif