diff options
Diffstat (limited to 'lib/Target/X86/X86Subtarget.cpp')
| -rw-r--r-- | lib/Target/X86/X86Subtarget.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp index 56983ce..8506fa6 100644 --- a/lib/Target/X86/X86Subtarget.cpp +++ b/lib/Target/X86/X86Subtarget.cpp @@ -207,6 +207,10 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { bool IsIntel = memcmp(text.c, "GenuineIntel", 12) == 0; bool IsAMD = !IsIntel && memcmp(text.c, "AuthenticAMD", 12) == 0; + + HasFMA3 = IsIntel && ((ECX >> 12) & 0x1); + HasAVX = ((ECX >> 28) & 0x1); + if (IsIntel || IsAMD) { // Determine if bit test memory instructions are slow. unsigned Family = 0; @@ -217,6 +221,7 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { X86::GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX); HasX86_64 = (EDX >> 29) & 0x1; HasSSE4A = IsAMD && ((ECX >> 6) & 0x1); + HasFMA4 = IsAMD && ((ECX >> 16) & 0x1); } } @@ -342,6 +347,10 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit) , X86SSELevel(NoMMXSSE) , X863DNowLevel(NoThreeDNow) , HasX86_64(false) + , HasSSE4A(false) + , HasAVX(false) + , HasFMA3(false) + , HasFMA4(false) , IsBTMemSlow(false) , DarwinVers(0) , IsLinux(false) |
