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include simd checks #43
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
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| include(CheckCXXSourceRuns) | ||
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| # save old configuration | ||
| set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) | ||
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| # set flags | ||
| set(AVX_FLAGS) | ||
| set(AVX2_FLAGS) | ||
| set(AVX512_FLAGS) | ||
| if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "MSVC") | ||
| set(AVX_FLAGS "/arch:AVX") | ||
| set(AVX2_FLAGS "/arch:AVX2") | ||
| # set(AVX512_FLAGS "/arch:AVX512") found no option for msvc | ||
| endif() | ||
| if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") | ||
| set(AVX_FLAGS "-mavx") | ||
| set(AVX2_FLAGS "-mavx2") | ||
| set(AVX512_FLAGS "-mavx512f" "-mavx512cd") # xeon processors have more flags | ||
| endif() | ||
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| # check for AVX | ||
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS} ${AVX_FLAGS}) | ||
| CHECK_CXX_SOURCE_RUNS(" | ||
| #include <immintrin.h> | ||
| int main(){ | ||
| const float src[8] = { 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f }; | ||
| float dst[8]; | ||
| __m256 a = _mm256_loadu_ps( src ); | ||
| __m256 b = _mm256_add_ps( a, a ); | ||
| _mm256_storeu_ps( dst, b ); | ||
| for( int i = 0; i < 8; i++ ) | ||
| if( ( src[i] + src[i] ) != dst[i] ) return -1; | ||
| return 0; | ||
| }" | ||
| AVX_ENABLED) | ||
| # remove flags if cpu does not support AVX | ||
| if(NOT AVX_ENABLED) | ||
| set(AVX_FLAGS "") | ||
| endif() | ||
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| # check for AVX2 | ||
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS} ${AVX2_FLAGS}) | ||
| CHECK_CXX_SOURCE_RUNS(" | ||
| #include <immintrin.h> | ||
| int main(){ | ||
| const int src[8] = { 1, 2, 3, 4, 5, 6, 7, 8 }; | ||
| int dst[8]; | ||
| __m256i a = _mm256_loadu_si256( (__m256i*)src ); | ||
| __m256i b = _mm256_add_epi32( a, a ); | ||
| _mm256_storeu_si256( (__m256i*)dst, b ); | ||
| for( int i = 0; i < 8; i++ ) | ||
| if( ( src[i] + src[i] ) != dst[i] ) return -1; | ||
| return 0; | ||
| }" | ||
| AVX2_ENABLED) | ||
| # remove flags if cpu does not support AVX | ||
| if(NOT AVX2_ENABLED) | ||
| set(AVX2_FLAGS "") | ||
| endif() | ||
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| # check for AVX512 | ||
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS} ${AVX512_FLAGS}) | ||
| CHECK_CXX_SOURCE_RUNS(" | ||
| #include <zmmintrin.h> | ||
| int main(){ | ||
| const int src[16] = { 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8 }; | ||
| int dst[16]; | ||
| __m512i a = _mm512_loadu_si512( (__m512i*)src ); | ||
| __m512i b = _mm512_add_epi32( a, a ); | ||
| _mm512_storeu_si512( (__m512i*)dst, b ); | ||
| for( int i = 0; i < 16; i++ ) | ||
| if( ( src[i] + src[i] ) != dst[i] ) return -1; | ||
| return 0; | ||
| }" | ||
| AVX512_ENABLED) | ||
| # remove flags if cpu does not support AVX | ||
| if(NOT AVX512_ENABLED) | ||
| set(AVX512_FLAGS "") | ||
| endif() | ||
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| # restore previous state of cmake variable | ||
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) |
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multiple flags are a problem for windows