add support for fstcw, PR8259
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115154 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 3ecf273..e028d41 100644
--- a/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -1119,13 +1119,19 @@
// First, handle aliases that expand to multiple instructions.
// FIXME: This should be replaced with a real .td file alias mechanism.
- if (Op->getToken() == "fstsw") {
+ if (Op->getToken() == "fstsw" || Op->getToken() == "fstcw") {
MCInst Inst;
Inst.setOpcode(X86::WAIT);
Out.EmitInstruction(Inst);
delete Operands[0];
- Operands[0] = X86Operand::CreateToken("fnstsw", IDLoc);
+ const char *Repl =
+ StringSwitch<const char*>(Op->getToken())
+ .Case("fstsw", "fnstsw")
+ .Case("fstcw", "fnstcw")
+ .Default(0);
+ assert(Repl && "Unknown wait-prefixed instruction");
+ Operands[0] = X86Operand::CreateToken(Repl, IDLoc);
}