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Update FindAVX.cmake (#404)

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* make AVX_FOUND is default value to WITH AVX
* let AVX_FLAG always keep -mavx flag since compiler can build binary with -mavx even CPU does not support avx.
avx_docs
gangliao 8 years ago committed by GitHub
parent 0c7ac3d9c2
commit 14ba68f963
2 changed files with 58 additions and 49 deletions
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14
CMakeLists.txt
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@ -109,11 +109,9 @@ else()
set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-g -O3 --use_fast_math")
if(WITH_AVX)
if(AVX_FOUND)
set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-Xcompiler -mavx")
endif(AVX_FOUND)
set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-Xcompiler ${AVX_FLAG}")
else(WITH_AVX)
set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-Xcompiler -msse3")
set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-Xcompiler ${SSE3_FLAG}")
endif(WITH_AVX)
if(WITH_DSO)
@ -138,11 +136,11 @@ if(NOT WITH_TIMER)
endif(NOT WITH_TIMER)
if(WITH_AVX)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${AVX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${AVX_FLAGS}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${AVX_FLAG}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${AVX_FLAG}")
else(WITH_AVX)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse3")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse3")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SSE3_FLAG}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SSE3_FLAG}")
endif(WITH_AVX)
if(WITH_PYTHON)

93
cmake/FindAVX.cmake
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@ -3,36 +3,55 @@
INCLUDE(CheckCXXSourceRuns)
SET(FIND_AVX_10)
SET(FIND_AVX_20)
SET(AVX_FLAGS)
SET(AVX_FOUND)
# Check AVX 2
SET(CMAKE_REQUIRED_FLAGS)
IF(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
SET(CMAKE_REQUIRED_FLAGS "-mavx2")
ELSEIF(MSVC AND NOT CMAKE_CL_64) # reserve for WINDOWS
SET(CMAKE_REQUIRED_FLAGS "/arch:AVX2")
set(MMX_FLAG "-mmmx")
set(SSE2_FLAG "-msse2")
set(SSE3_FLAG "-msse3")
SET(AVX_FLAG "-mavx")
SET(AVX2_FLAG "-mavx2")
ELSEIF(MSVC)
set(MMX_FLAG "/arch:MMX")
set(SSE2_FLAG "/arch:SSE2")
set(SSE3_FLAG "/arch:SSE3")
SET(AVX_FLAG "/arch:AVX")
SET(AVX2_FLAG "/arch:AVX2")
ENDIF()
# Check MMX
set(CMAKE_REQUIRED_FLAGS ${MMX_FLAG})
CHECK_CXX_SOURCE_RUNS("
#include <immintrin.h>
#include <mmintrin.h>
int main()
{
__m256i a = _mm256_set_epi32 (-1, 2, -3, 4, -1, 2, -3, 4);
__m256i result = _mm256_abs_epi32 (a);
_mm_setzero_si64();
return 0;
}" FIND_AVX_20)
}" MMX_FOUND)
# Check AVX
SET(CMAKE_REQUIRED_FLAGS)
IF(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
SET(CMAKE_REQUIRED_FLAGS "-mavx")
ELSEIF(MSVC AND NOT CMAKE_CL_64)
SET(CMAKE_REQUIRED_FLAGS "/arch:AVX")
endif()
# Check SSE2
set(CMAKE_REQUIRED_FLAGS ${SSE2_FLAG})
CHECK_CXX_SOURCE_RUNS("
#include <emmintrin.h>
int main()
{
_mm_setzero_si128();
return 0;
}" SSE2_FOUND)
# Check SSE3
set(CMAKE_REQUIRED_FLAGS ${SSE3_FLAG})
CHECK_CXX_SOURCE_RUNS("
#include <pmmintrin.h>
int main()
{
__m128d a = _mm_set1_pd(6.28);
__m128d b = _mm_set1_pd(3.14);
__m128d result = _mm_addsub_pd(a, b);
result = _mm_movedup_pd(result);
return 0;
}" SSE3_FOUND)
# Check AVX
set(CMAKE_REQUIRED_FLAGS ${AVX_FLAG})
CHECK_CXX_SOURCE_RUNS("
#include <immintrin.h>
int main()
@ -41,25 +60,17 @@ int main()
__m256 b = _mm256_set_ps (1.0f, 2.0f, 3.0f, 4.0f, 1.0f, 2.0f, 3.0f, 4.0f);
__m256 result = _mm256_add_ps (a, b);
return 0;
}" FIND_AVX_10)
IF(${FIND_AVX_20})
IF(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
SET(AVX_FLAGS "${AVX_FLAGS} -mavx2")
ELSEIF(MSVC)
SET(AVX_FLAGS "${AVX_FLAGS} /arch:AVX2")
ENDIF()
ENDIF()
}" AVX_FOUND)
IF(${FIND_AVX_10})
IF(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
SET(AVX_FLAGS "${AVX_FLAGS} -mavx")
ELSEIF(MSVC)
SET(AVX_FLAGS "${AVX_FLAGS} /arch:AVX")
ENDIF()
ENDIF()
# Check AVX 2
set(CMAKE_REQUIRED_FLAGS ${AVX2_FLAG})
CHECK_CXX_SOURCE_RUNS("
#include <immintrin.h>
int main()
{
__m256i a = _mm256_set_epi32 (-1, 2, -3, 4, -1, 2, -3, 4);
__m256i result = _mm256_abs_epi32 (a);
return 0;
}" AVX2_FOUND)
IF(${FIND_AVX_10})
SET(AVX_FOUND TRUE)
MESSAGE(STATUS "Find CPU supports ${AVX_FLAGS}.")
ENDIF()
mark_as_advanced(MMX_FOUND SSE2_FOUND SSE3_FOUND AVX_FOUND AVX2_FOUND)

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