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| author | Stefanus Du Toit <stefanus.du.toit@intel.com> | 2013-06-18 17:08:10 +0000 |
|---|---|---|
| committer | Stefanus Du Toit <stefanus.du.toit@intel.com> | 2013-06-18 17:08:10 +0000 |
| commit | 8811ad4f81766bfb6f49fafbf6ba5f419d61dcd3 (patch) | |
| tree | 0ffd864866584022e5f74b441a42719a741fe439 /llvm/utils/TableGen/X86RecognizableInstr.cpp | |
| parent | 4526b1d410a3d6d5571ddd27e2531aad13ca6093 (diff) | |
| download | bcm5719-llvm-8811ad4f81766bfb6f49fafbf6ba5f419d61dcd3.tar.gz bcm5719-llvm-8811ad4f81766bfb6f49fafbf6ba5f419d61dcd3.zip | |
Add support for encoding the HLE XACQUIRE and XRELEASE prefixes.
For decoding, keep the current behavior of always decoding these as their REP
versions. In the future, this could be improved to recognize the cases where
these behave as XACQUIRE and XRELEASE and decode them as such.
llvm-svn: 184207
Diffstat (limited to 'llvm/utils/TableGen/X86RecognizableInstr.cpp')
| -rw-r--r-- | llvm/utils/TableGen/X86RecognizableInstr.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/utils/TableGen/X86RecognizableInstr.cpp b/llvm/utils/TableGen/X86RecognizableInstr.cpp index 46f2052b010..76d986b1c1c 100644 --- a/llvm/utils/TableGen/X86RecognizableInstr.cpp +++ b/llvm/utils/TableGen/X86RecognizableInstr.cpp @@ -461,6 +461,12 @@ RecognizableInstr::filter_ret RecognizableInstr::filter() const { Name == "VMOVQs64rr") return FILTER_WEAK; + // XACQUIRE and XRELEASE reuse REPNE and REP respectively. + // For now, just prefer the REP versions. + if (Name == "XACQUIRE_PREFIX" || + Name == "XRELEASE_PREFIX") + return FILTER_WEAK; + if (HasFROperands && Name.find("MOV") != Name.npos && ((Name.find("2") != Name.npos && Name.find("32") == Name.npos) || (Name.find("to") != Name.npos))) |
