From b31b099a3722ad5b5d94ffe862ee92df51565b51 Mon Sep 17 00:00:00 2001 From: Aaron Ballman Date: Wed, 3 Apr 2013 18:00:22 +0000 Subject: [PATCH] Ensuring that both bits are set, and not just a combination of one or the other. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178674 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Support/Host.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp index fef66e634f9..73d98d14874 100644 --- a/lib/Support/Host.cpp +++ b/lib/Support/Host.cpp @@ -152,7 +152,8 @@ std::string sys::getHostCPUName() { // If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV // indicates that the AVX registers will be saved and restored on context // switch, then we have full AVX support. - bool HasAVX = (ECX & ((1 << 28) | (1 << 27))) != 0 && OSHasAVXSupport(); + const unsigned AVXBits = (1 << 27) | (1 << 28); + bool HasAVX = ((ECX & AVXBits) == AVXBits) && OSHasAVXSupport(); GetX86CpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX); bool Em64T = (EDX >> 29) & 0x1;