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Fix x87 tag word not updating on FST ST(0) self-store

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Simon Scherer committed 2026-09-04 11:51:12 +02:00
1 parent ed3fa2f1c6
commit 7236c2bf0a
2 files changed
+7 -11
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FEXCore/Source/Interface/Core/OpcodeDispatcher/X87.cpp
+1 -3
View File
@@ -139,9 +139,7 @@ void OpDispatchBuilder::FST(OpcodeArgs, IR::OpSize Width) {
void OpDispatchBuilder::FSTToStack(OpcodeArgs) {
const uint8_t Offset = Op->OP & 7;
if (Offset != 0) {
_StoreStackToStack(Offset);
}
_StoreStackToStack(Offset);
if (Op->TableInfo->Flags & X86Tables::InstFlags::FLAGS_POP) {
_PopStackDestroy();
FEXCore/Source/Interface/IR/Passes/x87StackOptimizationPass.cpp
+6 -8
View File
@@ -1041,15 +1041,13 @@ void X87StackOptimization::Run(IREmitter* Emit) {
const auto* Op = IROp->C<IROp_StoreStackToStack>();
auto Offset = Op->StackLocation;
if (Offset != 0) {
auto Value = MigrateToSlowPath_IfInvalid();
auto Value = MigrateToSlowPath_IfInvalid();
// Need to store st0 to stack location - basically a copy.
if (SlowPath) {
StoreStackValueAtOffset_Slow(LoadStackValueAtOffset_Slow(), Offset);
} else {
StackData.setTop(*Value, Offset);
}
// Need to store st0 to stack location - basically a copy.
if (SlowPath) {
StoreStackValueAtOffset_Slow(LoadStackValueAtOffset_Slow(), Offset);
} else {
StackData.setTop(*Value, Offset);
}
break;
}