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Merge pull request #3096 from Sonicadvance1/optimal_crc

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OpcodeDispatcher: Optimize CRC32
This commit is contained in:
Mai authored and GitHub committed 2023-09-15 05:19:05 -04:00
2 parents f84a264b0e 31ad26202e
commit 96bbd01ad6
2 files changed
+22 -22
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+10 -3
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@@ -5737,17 +5737,24 @@ void OpDispatchBuilder::RDTSCPOp(OpcodeArgs) {
}
void OpDispatchBuilder::CRC32(OpcodeArgs) {
const uint8_t GPRSize = CTX->GetGPRSize();
// Destination GPR size is always 4 or 8 bytes depending on widening
uint8_t DstSize = Op->Flags & FEXCore::X86Tables::DecodeFlags::FLAG_REX_WIDENING ? 8 : 4;
OrderedNode *Dest = LoadSource_WithOpSize(GPRClass, Op, Op->Dest, DstSize, Op->Flags, -1);
OrderedNode *Dest = LoadSource_WithOpSize(GPRClass, Op, Op->Dest, GPRSize, Op->Flags, -1);
// Incoming memory is 8, 16, 32, or 64
OrderedNode *Src = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags, 1);
OrderedNode *Src{};
if (Op->Src[0].IsGPR()) {
Src = LoadSource_WithOpSize(GPRClass, Op, Op->Src[0], GPRSize, Op->Flags, -1);
}
else {
Src = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags, 1);
}
auto Result = _CRC32(Dest, Src, GetSrcSize(Op));
StoreResult_WithOpSize(GPRClass, Op, Op->Dest, Result, DstSize, -1);
}
template<bool Reseed>
void OpDispatchBuilder::RDRANDOp(OpcodeArgs) {
auto Res = _RDRAND(Reseed);