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Merge pull request #4821 from bylaws/monof

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Frontend: Fix tailcall handling when mono hacks are enabled
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Ryan Houdek authored and GitHub committed 2025-09-06 16:51:08 -07:00
2 parents ea8ae2bf2c 28a1c28cb4
commit 6ae94581bb
6 files changed
+55 -47
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FEXCore/Source/Interface/Core/Frontend.cpp
+2 -2
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@@ -650,7 +650,7 @@ bool Decoder::NormalOp(const FEXCore::X86Tables::X86InstInfo* Info, uint16_t Op,
}
bool Decoder::NormalOpHeader(const FEXCore::X86Tables::X86InstInfo* Info, uint16_t Op) {
DecodeInst->OP = Op;
DecodeInst->OPRaw = DecodeInst->OP = Op;
DecodeInst->TableInfo = Info;
if (Info->Type == FEXCore::X86Tables::TYPE_UNKNOWN) {
@@ -1163,7 +1163,7 @@ bool Decoder::IsBranchMonoTailcall(uint64_t NumInstructions) const {
} else {
FEXCore::X86Tables::ModRMDecoded ModRM;
ModRM.Hex = DecodeInst->ModRM;
if (DecodeInst->OP == 0xFF && ModRM.reg == 4 && DecodeInst->Src[0].IsGPR()) {
if (DecodeInst->OPRaw == 0xFF && ModRM.reg == 4 && DecodeInst->Src[0].IsGPR()) {
if (DecodeInst->Src[0].Data.GPR.GPR == FEXCore::X86State::REG_RAX) {
// Found in versions of mono from 2024 onwards - matches:
// REX.W JMP rax