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core: several improves and fixes on ppc64le infrastructure

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- add infrastructure support for Power9/VSX3
  - fix missing VSX flags on GCC4.9 and CLANG4(#13210, #13222)
  - fix disable VSX optimzation on GCC by using flag ENABLE_VSX
  - flag ENABLE_VSX is deprecated now, use CPU_BASELINE, CPU_DISPATCH instead
  - add VSX3 to arithmetic dispatchable flags
This commit is contained in:
Sayed Adel
2018-11-20 12:05:20 +00:00
parent 183bc5c281
commit 474a0dac49
9 changed files with 93 additions and 28 deletions
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modules/core/src/system.cpp
+15 -15
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@@ -107,15 +107,14 @@ void* allocSingletonBuffer(size_t size) { return fastMalloc(size); }
# include <cpu-features.h>
#endif
#ifndef __VSX__
# if defined __PPC64__ && defined __linux__
# include "sys/auxv.h"
# ifndef AT_HWCAP2
# define AT_HWCAP2 26
# endif
# ifndef PPC_FEATURE2_ARCH_2_07
# define PPC_FEATURE2_ARCH_2_07 0x80000000
# endif
#if CV_VSX && defined __linux__
# include "sys/auxv.h"
# ifndef AT_HWCAP2
# define AT_HWCAP2 26
# endif
# ifndef PPC_FEATURE2_ARCH_3_00
# define PPC_FEATURE2_ARCH_3_00 0x00800000
# endif
#endif
@@ -359,6 +358,7 @@ struct HWFeatures
g_hwFeatureNames[CPU_NEON] = "NEON";
g_hwFeatureNames[CPU_VSX] = "VSX";
g_hwFeatureNames[CPU_VSX3] = "VSX3";
g_hwFeatureNames[CPU_AVX512_SKX] = "AVX512-SKX";
}
@@ -513,14 +513,14 @@ struct HWFeatures
#endif
#endif
#ifdef __VSX__
have[CV_CPU_VSX] = true;
#elif (defined __PPC64__ && defined __linux__)
uint64 hwcaps = getauxval(AT_HWCAP);
// there's no need to check VSX availability in runtime since it's always available on ppc64le CPUs
have[CV_CPU_VSX] = (CV_VSX);
// TODO: Check VSX3 availability in runtime for other platforms
#if CV_VSX && defined __linux__
uint64 hwcap2 = getauxval(AT_HWCAP2);
have[CV_CPU_VSX] = (hwcaps & PPC_FEATURE_PPC_LE && hwcaps & PPC_FEATURE_HAS_VSX && hwcap2 & PPC_FEATURE2_ARCH_2_07);
have[CV_CPU_VSX3] = (hwcap2 & PPC_FEATURE2_ARCH_3_00);
#else
have[CV_CPU_VSX] = false;
have[CV_CPU_VSX3] = (CV_VSX3);
#endif
int baseline_features[] = { CV_CPU_BASELINE_FEATURES };