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OpcodeDispatcher/Flags: dont emit zero

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig 2024-10-02 11:12:33 -04:00
parent f175b525f4
commit 6cc6181261
1 changed files with 3 additions and 6 deletions
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9
FEXCore/Source/Interface/Core/OpcodeDispatcher/Flags.cpp
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@ -76,16 +76,13 @@ Ref OpDispatchBuilder::GetPackedRFLAG(uint32_t FlagsMask) {
// Calculate flags early.
CalculateDeferredFlags();
Ref Original = _Constant(0);
// SF/ZF and N/Z are together on both arm64 and x86_64, so we special case that.
bool GetNZ = (FlagsMask & (1 << FEXCore::X86State::RFLAG_SF_RAW_LOC)) && (FlagsMask & (1 << FEXCore::X86State::RFLAG_ZF_RAW_LOC));
// Handle CF first, since it's at bit 0 and hence doesn't need shift or OR.
if (FlagsMask & (1 << FEXCore::X86State::RFLAG_CF_RAW_LOC)) {
static_assert(FEXCore::X86State::RFLAG_CF_RAW_LOC == 0);
Original = GetRFLAG(FEXCore::X86State::RFLAG_CF_RAW_LOC);
}
LOGMAN_THROW_A_FMT(FlagsMask & (1 << FEXCore::X86State::RFLAG_CF_RAW_LOC), "CF always handled");
static_assert(FEXCore::X86State::RFLAG_CF_RAW_LOC == 0);
Ref Original = GetRFLAG(FEXCore::X86State::RFLAG_CF_RAW_LOC);
for (size_t i = 0; i < FlagOffsets.size(); ++i) {
const auto FlagOffset = FlagOffsets[i];