From 1d73e228db39f9755bc601bc863b5701f22a9d6b Mon Sep 17 00:00:00 2001 From: Eric Christopher Date: Mon, 5 Aug 2019 21:25:59 +0000 Subject: 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 --- llvm/lib/Support/Host.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'llvm/lib/Support/Host.cpp') diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp index d491912bdc0..3ad1495957b 100644 --- a/llvm/lib/Support/Host.cpp +++ b/llvm/lib/Support/Host.cpp @@ -1034,7 +1034,7 @@ static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf, 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); -- cgit v1.2.3