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FEXCore: Implement SIDT

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Billy Laws committed 2025-02-27 23:45:14 +00:00
1 parent 57ed466a7f
commit a506c84bc7
4 files changed
+26 -4
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+16
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@@ -3001,6 +3001,22 @@ void OpDispatchBuilder::SGDTOp(OpcodeArgs) {
_StoreMemAutoTSO(GPRClass, GDTStoreSize, AddressMode {.Base = DestAddress, .Offset = 2, .AddrSize = OpSize::i64Bit}, _Constant(GDTAddress));
}
void OpDispatchBuilder::SIDTOp(OpcodeArgs) {
auto DestAddress = LoadSource(GPRClass, Op, Op->Dest, Op->Flags, {.LoadData = false});
// See SGDTOp, matches Linux in reported values
uint64_t IDTAddress = 0xFFFFFE0000000000ULL;
auto IDTStoreSize = OpSize::i64Bit;
if (!CTX->Config.Is64BitMode) {
// Mask off upper bits if 32-bit result.
IDTAddress &= ~0U;
IDTStoreSize = OpSize::i32Bit;
}
_StoreMemAutoTSO(GPRClass, OpSize::i16Bit, DestAddress, _Constant(0xfff));
_StoreMemAutoTSO(GPRClass, IDTStoreSize, AddressMode {.Base = DestAddress, .Offset = 2, .AddrSize = OpSize::i64Bit}, _Constant(IDTAddress));
}
void OpDispatchBuilder::SMSWOp(OpcodeArgs) {
const bool IsMemDst = DestIsMem(Op);