diff options
Diffstat (limited to 'llvm/lib/Support/Host.cpp')
| -rw-r--r-- | llvm/lib/Support/Host.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp index 656e2577608..304a9e3736a 100644 --- a/llvm/lib/Support/Host.cpp +++ b/llvm/lib/Support/Host.cpp @@ -1213,9 +1213,12 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) { Features["tbm"] = HasExtLeaf1 && ((ECX >> 21) & 1); Features["mwaitx"] = HasExtLeaf1 && ((ECX >> 29) & 1); + // Miscellaneous memory related features, detected by + // using the 0x80000008 leaf of the CPUID instruction bool HasExtLeaf8 = MaxExtLevel >= 0x80000008 && !getX86CpuIDAndInfo(0x80000008, &EAX, &EBX, &ECX, &EDX); - Features["clzero"] = HasExtLeaf8 && ((EBX >> 0) & 1); + Features["clzero"] = HasExtLeaf8 && ((EBX >> 0) & 1); + Features["wbnoinvd"] = HasExtLeaf8 && ((EBX >> 9) & 1); bool HasLeaf7 = MaxLevel >= 7 && !getX86CpuIDAndInfoEx(0x7, 0x0, &EAX, &EBX, &ECX, &EDX); |
