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OpcodeDispatcher: simplify flag control ops

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig committed 2023-11-09 09:40:51 -04:00
1 parent 1281145982
commit bdaa70405f
1 file changed
+6 -36
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+6 -36
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@@ -1550,53 +1550,23 @@ void OpDispatchBuilder::FLAGControlOp(OpcodeArgs) {
// Calculate flags early.
CalculateDeferredFlags();
enum class OpType {
Clear,
Set,
};
OpType Type;
uint64_t Flag;
switch (Op->OP) {
case 0xF5: {// CMC
case 0xF5: // CMC
CarryInvert();
return;
}
break;
case 0xF8: // CLC
Flag= FEXCore::X86State::RFLAG_CF_RAW_LOC;
Type = OpType::Clear;
SetRFLAG(_Constant(0), FEXCore::X86State::RFLAG_CF_RAW_LOC);
break;
case 0xF9: // STC
Flag= FEXCore::X86State::RFLAG_CF_RAW_LOC;
Type = OpType::Set;
SetRFLAG(_Constant(1), FEXCore::X86State::RFLAG_CF_RAW_LOC);
break;
case 0xFC: // CLD
Flag= FEXCore::X86State::RFLAG_DF_LOC;
Type = OpType::Clear;
SetRFLAG(_Constant(0), FEXCore::X86State::RFLAG_DF_LOC);
break;
case 0xFD: // STD
Flag= FEXCore::X86State::RFLAG_DF_LOC;
Type = OpType::Set;
SetRFLAG(_Constant(1), FEXCore::X86State::RFLAG_DF_LOC);
break;
}
// AF would need special handling here. It doesn't matter.
LOGMAN_THROW_AA_FMT(Flag != FEXCore::X86State::RFLAG_AF_RAW_LOC,
"No AF complement instruction in x86");
OrderedNode *Result{};
switch (Type) {
case OpType::Clear: {
Result = _Constant(0);
break;
}
case OpType::Set: {
Result = _Constant(1);
break;
}
}
SetRFLAG(Result, Flag);
}