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| author | Craig Topper <craig.topper@gmail.com> | 2011-10-07 05:35:38 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2011-10-07 05:35:38 +0000 |
| commit | 5aebebe18d9f290f7e6f93fb2104379cea9cc185 (patch) | |
| tree | 3abfbeb709f93a1a8446466e218780f7825cb970 /llvm/utils/TableGen/X86DisassemblerTables.cpp | |
| parent | c26e4454035a4160cffc3c865cf83be194ca38c4 (diff) | |
| download | llvm-5aebebe18d9f290f7e6f93fb2104379cea9cc185.zip llvm-5aebebe18d9f290f7e6f93fb2104379cea9cc185.tar.gz llvm-5aebebe18d9f290f7e6f93fb2104379cea9cc185.tar.bz2 | |
Revert part of r141274. Only need to change encoding for xchg %eax, %eax in 64-bit mode. This is because in 64-bit mode xchg %eax, %eax implies zeroing the upper 32-bits of RAX which makes it not a NOP. In 32-bit mode using NOP encoding is fine.
llvm-svn: 141353
Diffstat (limited to 'llvm/utils/TableGen/X86DisassemblerTables.cpp')
| -rw-r--r-- | llvm/utils/TableGen/X86DisassemblerTables.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/utils/TableGen/X86DisassemblerTables.cpp b/llvm/utils/TableGen/X86DisassemblerTables.cpp index 218a1a2..f42119c 100644 --- a/llvm/utils/TableGen/X86DisassemblerTables.cpp +++ b/llvm/utils/TableGen/X86DisassemblerTables.cpp @@ -620,6 +620,7 @@ void DisassemblerTables::setTableFields(ModRMDecision &decision, if(previousInfo.name == "NOOP" && (newInfo.name == "XCHG16ar" || newInfo.name == "XCHG32ar" || + newInfo.name == "XCHG32ar64" || newInfo.name == "XCHG64ar")) continue; // special case for XCHG*ar and NOOP |