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[X86] In getHostCPUFeatures, disable xop, f16c, fma, and fma4 if OS does not support saving ymm state.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233518 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2015-03-30 06:31:14 +00:00
parent 5ffc995ff3
commit 8b042883dc
1 changed files with 4 additions and 4 deletions
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8
lib/Support/Host.cpp
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@ -709,12 +709,10 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
Features["sse4.2"] = (ECX >> 20) & 1;
Features["pclmul"] = (ECX >> 1) & 1;
Features["fma"] = (ECX >> 12) & 1;
Features["cx16"] = (ECX >> 13) & 1;
Features["movbe"] = (ECX >> 22) & 1;
Features["popcnt"] = (ECX >> 23) & 1;
Features["aes"] = (ECX >> 25) & 1;
Features["f16c"] = (ECX >> 29) & 1;
Features["rdrnd"] = (ECX >> 30) & 1;
// If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
@ -723,6 +721,8 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
bool HasAVX = ((ECX >> 27) & 1) && ((ECX >> 28) & 1) &&
!GetX86XCR0(&EAX, &EDX) && ((EAX & 0x6) == 0x6);
Features["avx"] = HasAVX;
Features["fma"] = HasAVX && (ECX >> 12) & 1;
Features["f16c"] = HasAVX && (ECX >> 29) & 1;
// AVX512 requires additional context to be saved by the OS.
bool HasAVX512Save = HasAVX && ((EAX & 0xe0) == 0xe0);
@ -735,8 +735,8 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
Features["lzcnt"] = HasExtLeaf1 && ((ECX >> 5) & 1);
Features["sse4a"] = HasExtLeaf1 && ((ECX >> 6) & 1);
Features["prfchw"] = HasExtLeaf1 && ((ECX >> 8) & 1);
Features["xop"] = HasExtLeaf1 && ((ECX >> 11) & 1);
Features["fma4"] = HasExtLeaf1 && ((ECX >> 16) & 1);
Features["xop"] = HasAVX && HasExtLeaf1 && ((ECX >> 11) & 1);
Features["fma4"] = HasAVX && HasExtLeaf1 && ((ECX >> 16) & 1);
Features["tbm"] = HasExtLeaf1 && ((ECX >> 21) & 1);
bool HasLeaf7 = MaxLevel >= 7 &&