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| author | Michael Liao <michael.liao@intel.com> | 2013-03-26 17:47:11 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2013-03-26 17:47:11 +0000 |
| commit | 675eb3b9ac547119f6db676ebdd172d40a797b1c (patch) | |
| tree | 4f13b3e2e5500e67183794bd4f1409ccd12b04d9 /lib/Target/X86/X86Subtarget.cpp | |
| parent | 30ebb962b6fe110514917f31522a81f2c6d914ba (diff) | |
| download | llvm-675eb3b9ac547119f6db676ebdd172d40a797b1c.tar.gz llvm-675eb3b9ac547119f6db676ebdd172d40a797b1c.tar.bz2 llvm-675eb3b9ac547119f6db676ebdd172d40a797b1c.tar.xz | |
Add PREFETCHW codegen support
- Add 'PRFCHW' feature defined in AVX2 ISA extension
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178040 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86Subtarget.cpp')
| -rw-r--r-- | lib/Target/X86/X86Subtarget.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp index 0f2c008ab9..1a7c2c29eb 100644 --- a/lib/Target/X86/X86Subtarget.cpp +++ b/lib/Target/X86/X86Subtarget.cpp @@ -283,6 +283,10 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { HasLZCNT = true; ToggleFeature(X86::FeatureLZCNT); } + if (IsIntel && ((ECX >> 8) & 0x1)) { + HasPRFCHW = true; + ToggleFeature(X86::FeaturePRFCHW); + } if (IsAMD) { if ((ECX >> 6) & 0x1) { HasSSE4A = true; @@ -440,6 +444,7 @@ void X86Subtarget::initializeEnvironment() { HasBMI2 = false; HasRTM = false; HasADX = false; + HasPRFCHW = false; IsBTMemSlow = false; IsUAMemFast = false; HasVectorUAMem = false; |