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Improve AVX detection #5168

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30 changes: 13 additions & 17 deletions cmake/modules/FindAVX.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,7 @@ SET(AVX2_CODE "

MACRO(CHECK_SSE lang type flags)
SET(__FLAG_I 1)
string(REPLACE " " ";" flags "${flags}")
FOREACH(__FLAG ${flags})
IF(NOT ${lang}_${type}_FOUND)
cmake_push_check_state(RESET)
Expand All @@ -70,9 +71,7 @@ MACRO(CHECK_SSE lang type flags)
CONTINUE()
ENDIF()
IF(${CHECK_AVX_COMPILE})
SET(${lang}_${type}_FOUND TRUE CACHE BOOL "${lang} ${type} support")
string(REPLACE " " ";" __FLAG "${__FLAG}")
SET(${lang}_${type}_FLAGS "${__FLAG}" CACHE STRING "${lang} ${type} flags")
SET(${lang}_${type}_FLAGS "${${lang}_${type}_FLAGS} ${__FLAG}")
MATH(EXPR __FLAG_I "${__FLAG_I}+1")
CONTINUE()
ENDIF()
Expand All @@ -81,34 +80,31 @@ MACRO(CHECK_SSE lang type flags)
unset(${lang}_HAS_${type}_${__FLAG_I} CACHE)
SET(CMAKE_REQUIRED_FLAGS ${__FLAG})
CHECK_SOURCE_RUNS(${lang} "${${type}_CODE}" ${lang}_HAS_${type}_${__FLAG_I})
cmake_pop_check_state()
IF(${lang}_HAS_${type}_${__FLAG_I})
SET(${lang}_${type}_FOUND TRUE CACHE BOOL "${lang} ${type} support")
string(REPLACE " " ";" __FLAG "${__FLAG}")
SET(${lang}_${type}_FLAGS "${__FLAG}" CACHE STRING "${lang} ${type} flags")
SET(${lang}_${type}_FLAGS "${${lang}_${type}_FLAGS} ${__FLAG}")
ENDIF()
MATH(EXPR __FLAG_I "${__FLAG_I}+1")
cmake_pop_check_state()
ENDIF()
ENDFOREACH()

SET(${lang}_${type}_FOUND "${${lang}_${type}_FOUND}" CACHE BOOL "${lang} ${type} support")
SET(${lang}_${type}_FLAGS "${${lang}_${type}_FLAGS}" CACHE STRING "${lang} ${type} flags")

MARK_AS_ADVANCED(${lang}_${type}_FOUND ${lang}_${type}_FLAGS)
if(${lang}_${type}_FLAGS)
SET(${lang}_${type}_FLAGS "${${lang}_${type}_FLAGS}" CACHE STRING "${lang} ${type} flags")
endif()
ENDMACRO()


get_property(languages GLOBAL PROPERTY ENABLED_LANGUAGES)
foreach(lang C;CXX)
if(lang IN_LIST languages)
if(MSVC)
CHECK_SSE(${lang} "AVX" "/arch:AVX;")
CHECK_SSE(${lang} "AVX2" "/arch:AVX2;")
CHECK_SSE(${lang} "AVX512" "/arch:AVX512;")
CHECK_SSE(${lang} "AVX" "/arch:AVX")
CHECK_SSE(${lang} "AVX2" "/arch:AVX2")
CHECK_SSE(${lang} "AVX512" "/arch:AVX512")
else()
CHECK_SSE(${lang} "AVX" "-mavx;")
CHECK_SSE(${lang} "AVX2" "-mavx2 -mfma -mf16c;")
CHECK_SSE(${lang} "AVX512" "-mavx512f -mavx512dq -mavx512vl -mavx512bw -mfma;")
CHECK_SSE(${lang} "AVX" "-mavx")
CHECK_SSE(${lang} "AVX2" "-mavx2 -mfma -mf16c")
CHECK_SSE(${lang} "AVX512" "-mavx512f -mavx512dq -mavx512vl -mavx512bw -mfma")
endif()
endif()
endforeach()
Expand Down