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| author | Yunzhong Gao <Yunzhong_Gao@playstation.sony.com> | 2013-10-16 19:07:02 +0000 |
|---|---|---|
| committer | Yunzhong Gao <Yunzhong_Gao@playstation.sony.com> | 2013-10-16 19:07:02 +0000 |
| commit | 6108936fa633f32309f4bc7fd52544a263924bbf (patch) | |
| tree | 89690c33d64fcd393e42786832d6795a0b7bda08 /clang/lib/Basic/Targets.cpp | |
| parent | dfc277f35012995d5b8052685c1965b6ca001d6e (diff) | |
| download | bcm5719-llvm-6108936fa633f32309f4bc7fd52544a263924bbf.tar.gz bcm5719-llvm-6108936fa633f32309f4bc7fd52544a263924bbf.zip | |
Enabling 3DNow! prefetch instruction support for a few AMD processors in the
clang front end. This change will allow the __PRFCHW__ macro to be set on these
processors and hence include prfchwintrin.h in x86intrin.h header. Support for
the intrinsic itself seems to have already been added in r178041.
Differential Revision: http://llvm-reviews.chandlerc.com/D1934
llvm-svn: 192829
Diffstat (limited to 'clang/lib/Basic/Targets.cpp')
| -rw-r--r-- | clang/lib/Basic/Targets.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp index 09e7dad0639..701c0a9e707 100644 --- a/clang/lib/Basic/Targets.cpp +++ b/clang/lib/Basic/Targets.cpp @@ -2120,6 +2120,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const { setFeatureEnabledImpl(Features, "cx16", true); setFeatureEnabledImpl(Features, "lzcnt", true); setFeatureEnabledImpl(Features, "popcnt", true); + setFeatureEnabledImpl(Features, "prfchw", true); break; case CK_BTVER2: setFeatureEnabledImpl(Features, "avx", true); @@ -2127,6 +2128,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const { setFeatureEnabledImpl(Features, "lzcnt", true); setFeatureEnabledImpl(Features, "aes", true); setFeatureEnabledImpl(Features, "pclmul", true); + setFeatureEnabledImpl(Features, "prfchw", true); setFeatureEnabledImpl(Features, "bmi", true); setFeatureEnabledImpl(Features, "f16c", true); setFeatureEnabledImpl(Features, "cx16", true); @@ -2136,6 +2138,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const { setFeatureEnabledImpl(Features, "lzcnt", true); setFeatureEnabledImpl(Features, "aes", true); setFeatureEnabledImpl(Features, "pclmul", true); + setFeatureEnabledImpl(Features, "prfchw", true); setFeatureEnabledImpl(Features, "cx16", true); break; case CK_BDVER2: @@ -2143,6 +2146,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const { setFeatureEnabledImpl(Features, "lzcnt", true); setFeatureEnabledImpl(Features, "aes", true); setFeatureEnabledImpl(Features, "pclmul", true); + setFeatureEnabledImpl(Features, "prfchw", true); setFeatureEnabledImpl(Features, "bmi", true); setFeatureEnabledImpl(Features, "fma", true); setFeatureEnabledImpl(Features, "f16c", true); @@ -2467,6 +2471,13 @@ bool X86TargetInfo::HandleTargetFeatures(std::vector<std::string> &Features, Features.push_back("+popcnt"); } + // Enable prfchw if 3DNow! is enabled and prfchw is not explicitly disabled. + if (!HasPRFCHW && MMX3DNowLevel >= AMD3DNow && + std::find(Features.begin(), Features.end(), "-prfchw") == Features.end()){ + HasPRFCHW = true; + Features.push_back("+prfchw"); + } + // LLVM doesn't have a separate switch for fpmath, so only accept it if it // matches the selected sse level. if (FPMath == FP_SSE && SSELevel < SSE1) { |
