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Ensuring that both bits are set, and not just a combination of one or the other.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178674 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Aaron Ballman 2013-04-03 18:00:22 +00:00
parent 63c32a7a9f
commit b31b099a37
1 changed files with 2 additions and 1 deletions
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lib/Support/Host.cpp
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@ -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;