diff options
| -rw-r--r-- | lib/Target/X86/AsmParser/X86AsmParser.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp index ac4d4e90d1..7037796124 100644 --- a/lib/Target/X86/AsmParser/X86AsmParser.cpp +++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp @@ -597,6 +597,16 @@ ParseInstruction(const StringRef &Name, SMLoc NameLoc, return Error(NameLoc, "pushfq cannot be encoded in 32-bit mode"); } + // The "Jump if rCX Zero" form jcxz is not allowed in 64-bit mode and + // the form jrcxz is not allowed in 32-bit mode. + if (Is64Bit) { + if (Name == "jcxz") + return Error(NameLoc, "jcxz cannot be encoded in 64-bit mode"); + } else { + if (Name == "jrcxz") + return Error(NameLoc, "jrcxz cannot be encoded in 32-bit mode"); + } + // FIXME: Hack to recognize "sal..." and "rep..." for now. We need a way to // represent alternative syntaxes in the .td file, without requiring // instruction duplication. @@ -618,7 +628,11 @@ ParseInstruction(const StringRef &Name, SMLoc NameLoc, .Case("jz", "je") .Case("jnz", "jne") .Case("jc", "jb") + // FIXME: in 32-bit mode jcxz requires an AdSize prefix. In 64-bit mode + // jecxz requires an AdSize prefix but jecxz does not have a prefix in + // 32-bit mode. .Case("jecxz", "jcxz") + .Case("jrcxz", "jcxz") .Case("jna", "jbe") .Case("jnae", "jb") .Case("jnb", "jae") |