diff options
Diffstat (limited to 'clang/lib/Basic/Targets/X86.cpp')
| -rw-r--r-- | clang/lib/Basic/Targets/X86.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/clang/lib/Basic/Targets/X86.cpp b/clang/lib/Basic/Targets/X86.cpp index fa5ffd5e801..87535824adf 100644 --- a/clang/lib/Basic/Targets/X86.cpp +++ b/clang/lib/Basic/Targets/X86.cpp @@ -115,6 +115,11 @@ bool X86TargetInfo::initFeatureMap( if (Kind != CK_Lakemont) setFeatureEnabledImpl(Features, "x87", true); + // Enable cmpxchg8 for i586 and greater CPUs. Include generic for backwards + // compatibility. + if (Kind >= CK_i586 || Kind == CK_Generic) + setFeatureEnabledImpl(Features, "cx8", true); + switch (Kind) { case CK_Generic: case CK_i386: @@ -777,6 +782,8 @@ bool X86TargetInfo::handleTargetFeatures(std::vector<std::string> &Features, HasMOVBE = true; } else if (Feature == "+sgx") { HasSGX = true; + } else if (Feature == "+cx8") { + HasCX8 = true; } else if (Feature == "+cx16") { HasCX16 = true; } else if (Feature == "+fxsr") { @@ -1275,12 +1282,12 @@ void X86TargetInfo::getTargetDefines(const LangOptions &Opts, break; } - if (CPU >= CK_i486) { + if (CPU >= CK_i486 || CPU == CK_Generic) { Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1"); Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2"); Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4"); } - if (CPU >= CK_i586) + if (HasCX8) Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8"); if (HasCX16 && getTriple().getArch() == llvm::Triple::x86_64) Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16"); @@ -1394,6 +1401,7 @@ bool X86TargetInfo::hasFeature(StringRef Feature) const { .Case("clflushopt", HasCLFLUSHOPT) .Case("clwb", HasCLWB) .Case("clzero", HasCLZERO) + .Case("cx8", HasCX8) .Case("cx16", HasCX16) .Case("f16c", HasF16C) .Case("fma", HasFMA) |
