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OpcodeDispatcher: remove rcl sub

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig 2024-01-25 18:26:13 -04:00
parent b6d8749525
commit fb6f850bb4
1 changed files with 3 additions and 2 deletions
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5
FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
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@ -2682,10 +2682,11 @@ void OpDispatchBuilder::RCLOp(OpcodeArgs) {
// Res |= (SrcMasked >> (Size - Shift + 1)), expressed as
// Res | ((SrcMasked >> (-Shift)) >> 1), since Size - Shift = -Shift mod
// Size.
Res = _Orlshr(OpSize, Res, _Lshr(OpSize, Dest, _Neg(OpSize, SrcMasked)), 1);
auto NegSrc = _Neg(OpSize, SrcMasked);
Res = _Orlshr(OpSize, Res, _Lshr(OpSize, Dest, NegSrc), 1);
// Our new CF will be bit (Shift - 1) of the source
auto NewCF = _Lshr(OpSize, Dest, _Sub(OpSize, _Constant(Size, Size), SrcMasked));
auto NewCF = _Lshr(OpSize, Dest, NegSrc);
SetRFLAG<FEXCore::X86State::RFLAG_CF_RAW_LOC>(NewCF, 0, true);
// Since Shift != 0 we can inject the CF