| commit | 1d73e228db39f9755bc601bc863b5701f22a9d6b | [log] [tgz] |
|---|---|---|
| author | Eric Christopher <echristo@gmail.com> | Mon Aug 05 21:25:59 2019 +0000 |
| committer | Eric Christopher <echristo@gmail.com> | Mon Aug 05 21:25:59 2019 +0000 |
| tree | f01c5f45054fd49ee0e1cbe0a972fafb353d1ab1 | |
| parent | 23f073100d5c882abcebb0edcbcdba78bdcbb14c [diff] [blame] |
BMI2 support is indicated in bit eight of EBX, not nine. See Intel SDM, Vol 2A, Table 3-8: https://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-vol-2a-manual.pdf#page=296 Differential Revision: https://reviews.llvm.org/D65766 llvm-svn: 367929
diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp index d491912..3ad1495 100644 --- a/llvm/lib/Support/Host.cpp +++ b/llvm/lib/Support/Host.cpp
@@ -1034,7 +1034,7 @@ setFeature(X86::FEATURE_BMI); if (HasLeaf7 && ((EBX >> 5) & 1) && HasAVX) setFeature(X86::FEATURE_AVX2); - if (HasLeaf7 && ((EBX >> 9) & 1)) + if (HasLeaf7 && ((EBX >> 8) & 1)) setFeature(X86::FEATURE_BMI2); if (HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save) setFeature(X86::FEATURE_AVX512F);