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OpcodeDispatcher: reorder flag calcs in bt*

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saves big moves.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig committed 2023-11-29 14:22:21 -04:00
1 parent 3020626506
commit 7216415bfc
1 file changed
+7 -3
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+7 -3
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@@ -2768,6 +2768,10 @@ void OpDispatchBuilder::BTOp(OpcodeArgs) {
Value = _Lshr(IR::SizeToOpSize(LshrSize), Value, BitSelect);
}
// OF/SF/ZF/AF/PF undefined.
// Set CF before the action to save a move.
SetRFLAG<FEXCore::X86State::RFLAG_CF_RAW_LOC>(Value, ConstantShift, true);
switch (Action) {
case BTAction::BTNone: {
/* Nothing to do */
@@ -2869,10 +2873,10 @@ void OpDispatchBuilder::BTOp(OpcodeArgs) {
// Now shift in to the correct bit location
Value = _Lshr(IR::SizeToOpSize(std::max<uint8_t>(4u, GetOpSize(Value))), Value, BitSelect);
}
// OF/SF/ZF/AF/PF undefined.
SetRFLAG<FEXCore::X86State::RFLAG_CF_RAW_LOC>(Value, ConstantShift, true);
// OF/SF/ZF/AF/PF undefined.
SetRFLAG<FEXCore::X86State::RFLAG_CF_RAW_LOC>(Value, ConstantShift, true);
}
}
void OpDispatchBuilder::IMUL1SrcOp(OpcodeArgs) {