diff options
| author | Bruno Rosa <bruno.rosa@eldorado.org.br> | 2017-04-28 22:35:14 +0300 |
|---|---|---|
| committer | Soumith Chintala <soumith@gmail.com> | 2017-04-28 20:41:03 +0300 |
| commit | e8c556d35c97029531c0d1449fcf418728f835e3 (patch) | |
| tree | 13484cb5c1e5f52d8e7505eb09f36df6024755cc | |
| parent | 5ac8403221ac50895b39ae3d193e12356ae6ef25 (diff) | |
Add option to disable ppc64le's VSX support
Set environment variable TH_NO_VSX=1 to disable VSX.
| -rw-r--r-- | lib/TH/README.md | 6 | ||||
| -rw-r--r-- | lib/TH/generic/simd/simd.h | 12 |
2 files changed, 14 insertions, 4 deletions
diff --git a/lib/TH/README.md b/lib/TH/README.md index c646ce9..4ac26c1 100644 --- a/lib/TH/README.md +++ b/lib/TH/README.md @@ -1,7 +1,11 @@ Environment variables control the disabling of certain explicit SIMD optimizations. ``` +x64 options: TH_NO_AVX2=1 # disable AVX2 codepaths TH_NO_AVX=1 # disable AVX codepaths TH_NO_SSE=1 # disable SSE codepaths -```
\ No newline at end of file + +ppc64le options: +TH_NO_VSX=1 # disable VSX codepaths +``` diff --git a/lib/TH/generic/simd/simd.h b/lib/TH/generic/simd/simd.h index 19d41b1..83c4c56 100644 --- a/lib/TH/generic/simd/simd.h +++ b/lib/TH/generic/simd/simd.h @@ -78,7 +78,13 @@ static inline uint32_t detectHostSIMDExtensions() static inline uint32_t detectHostSIMDExtensions() { - return SIMDExtension_VSX; + uint32_t hostSimdExts = SIMDExtension_DEFAULT; + char *evar; + + evar = getenv("TH_NO_VSX"); + if (evar == NULL || strncmp(evar, "1", 2) != 0) + hostSimdExts = SIMDExtension_VSX; + return hostSimdExts; } #else //PPC64 without VSX @@ -89,7 +95,7 @@ static inline uint32_t detectHostSIMDExtensions() } #endif - + #else // x86 static inline void cpuid(uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) { @@ -146,7 +152,7 @@ static inline uint32_t detectHostSIMDExtensions() evar = getenv("TH_NO_SSE"); if (evar == NULL || strncmp(evar, "1", 2) != 0) - TH_NO_SSE = 0; + TH_NO_SSE = 0; if (edx & CPUID_SSE_BIT && TH_NO_SSE == 0) { hostSimdExts |= SIMDExtension_SSE; } |