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feat: better MMI instruction on decoder

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Ran-j
2025-11-29 00:44:52 -03:00
parent c423e2f1ae
commit 95c824ea61
1 changed files with 28 additions and 16 deletions
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ps2xRecomp/src/r5900_decoder.cpp
+28 -16
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@@ -508,7 +508,34 @@ namespace ps2recomp
switch (mmiFunction)
{
// Thouse comments has the same value
case MMI_PLZCW:
// Parallel leading zero/one count word
break;
case MMI_MFHI1:
case MMI_MFLO1:
// Move from HI1/LO1 -> rd
if (inst.rd == 0)
{
inst.modificationInfo.modifiesGPR = false;
}
inst.modificationInfo.modifiesControl = false;
break;
case MMI_MTHI1:
case MMI_MTLO1:
// Move to HI1/LO1
inst.modificationInfo.modifiesGPR = false;
inst.modificationInfo.modifiesControl = true;
break;
case MMI_PSLLH:
case MMI_PSRLH:
case MMI_PSRAH:
case MMI_PSLLW:
case MMI_PSRLW:
case MMI_PSRAW:
// Packed shift instructions; defaults already mark GPR modify (unless rd==0)
break;
// HI/LO or HI1/LO1 producers/consumers
case MMI_MADD:
case MMI_MADDU:
case MMI_MSUB:
@@ -519,24 +546,9 @@ namespace ps2recomp
case MMI_MULTU1:
case MMI_DIV1:
case MMI_DIVU1:
// case MMI2_PMADDW:
case MMI2_PMSUBW:
case MMI2_PMULTW:
case MMI2_PDIVW:
case MMI2_PDIVBW:
case MMI2_PMADDH:
case MMI2_PHMADH:
// case MMI2_PMSUBH:
// case MMI2_PHMSBH:
case MMI2_PMULTH:
// case MMI3_PMADDUW:
// case MMI3_PMULTUW:
// case MMI3_PDIVUW:
inst.modificationInfo.modifiesGPR = false; // Writes to HI/LO or HI1/LO1
inst.modificationInfo.modifiesControl = true;
break;
case MMI_MTHI1:
case MMI_MTLO1:
case MMI_PMTHL:
case MMI3_PMTHI:
case MMI3_PMTLO: