diff options
| -rw-r--r-- | lib/Target/X86/AsmParser/X86AsmParser.cpp | 16 | ||||
| -rw-r--r-- | test/MC/AsmParser/X86/x86_instructions.s | 14 |
2 files changed, 23 insertions, 7 deletions
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp index dde34631ef..c21fc7ab56 100644 --- a/lib/Target/X86/AsmParser/X86AsmParser.cpp +++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp @@ -933,13 +933,15 @@ ParseInstruction(StringRef Name, SMLoc NameLoc, NameLoc, NameLoc)); } - // The assembler accepts these instructions with no operand as a synonym for - // an instruction acting on st,st(1). e.g. "faddp" -> "faddp %st(0),%st(1)". - //if (() && - // Operands.size() == 1) { - // Operands.push_back(X86Operand::CreateReg(MatchRegisterName("st(1)"), - // NameLoc, NameLoc)); - //} + // The assembler accepts these instructions with two few operands as a synonym + // for taking %st(1),%st(0) or X, %st(0). + if ((Name == "fcomi" || Name == "fucomi") && Operands.size() < 3) { + if (Operands.size() == 1) + Operands.push_back(X86Operand::CreateReg(MatchRegisterName("st(1)"), + NameLoc, NameLoc)); + Operands.push_back(X86Operand::CreateReg(MatchRegisterName("st(0)"), + NameLoc, NameLoc)); + } return false; } diff --git a/test/MC/AsmParser/X86/x86_instructions.s b/test/MC/AsmParser/X86/x86_instructions.s index 4bdd171445..cd7c6e117a 100644 --- a/test/MC/AsmParser/X86/x86_instructions.s +++ b/test/MC/AsmParser/X86/x86_instructions.s @@ -235,3 +235,17 @@ fsubrp fmulp fdivp fdivrp + +// CHECK: fcomi %st(1), %st(0) +// CHECK: fcomi %st(2), %st(0) +// CHECK: fucomi %st(1), %st(0) +// CHECK: fucomi %st(2), %st(0) +// CHECK: fucomi %st(2), %st(0) + +fcomi +fcomi %st(2) +fucomi +fucomi %st(2) +fucomi %st(2), %st + + |