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IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
message("-- <FindVSX>")
EXEC_PROGRAM(LD_SHOW_AUXV=1 ARGS "/bin/true" OUTPUT_VARIABLE bintrue)
if(bintrue MATCHES "AT_PLATFORM:[ \\t\\n\\r]*([a-zA-Z0-9_]+)[ \\t\\n\\r]*")
if(CMAKE_MATCH_COUNT GREATER 0)
string(TOLOWER ${CMAKE_MATCH_1} platform)
if(${platform} MATCHES "^power")
message("-- POWER Platform: ${platform}")
SET(POWER_COMP TRUE CACHE BOOL "power ")
SET(CXX_VSX_FLAGS "${CXX_VSX_FLAGS} -mcpu=${platform} -mtune=${platform}" )
endif()
endif()
endif()
SET(VSX_CODE " #include <altivec.h>
int main() {
float __attribute__((aligned(16))) vptr_y[8] = { 1.0f,2.f,3.f,4.f,4.f,3.f,2.f,1.f };
__vector float v_result = vec_add(vec_vsx_ld(0, vptr_y), vec_vsx_ld(16, vptr_y));
return 0;
}")
#check_cxx_compiler_flag(-mvsx vsx_flag)
SET(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
SET(CMAKE_REQUIRED_FLAGS "-mvsx")
CHECK_C_SOURCE_COMPILES("${VSX_CODE}" C_VSX_FOUND)
CHECK_CXX_SOURCE_COMPILES("${VSX_CODE}" CXX_VSX_FOUND)
SET(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
if(CXX_VSX_FOUND)
message("-- VSX flag was set.")
SET(CXX_VSX_FLAGS "${CXX_VSX_FLAGS} -mvsx" )
elseif(POWER_COMP)
message(WARNING "-- VSX flag was not set.")
endif()
message("-- </FindVSX>")
endif()
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