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IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
message("-- <FindZVECTOR>")
SET(VECTORIZATION_CODE "
#include <vecintrin.h>
using vuint32 = __attribute__ ((vector_size (16))) unsigned int;
using vfloat32 = __attribute__ ((vector_size (16))) float;
vfloat32 vsel_ext(vuint32 o, vfloat32 x, vfloat32 y)
{
return vec_sel(y, x, o);
}
int main(){
vfloat32 h1 ={3.f, 4.f, 5.f, 6.f};
vfloat32 h2 = {9.f, 8.f, 11.f, 12.f};
vuint32 selector= {0xFFFFFFFF, 0, 0xFFFFFFFF, 0xFFFFFFFF};
vfloat32 hf = vsel_ext(selector, h1,h2);
int ret = (int)(hf[0]*1000+hf[1]*100+hf[2]*10+hf[3]);
return (ret == 3856) ? 0 : -1;
}
")
SET(ARCH_SIMD_TEST_FLAGS " -mvx -mzvector")
SET(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
SET(CMAKE_REQUIRED_FLAGS "${ARCH_SIMD_TEST_FLAGS}")
# Do compilation check instead of runtime check
# in case it is compiled on older hardware
# or crosscompiled
CHECK_CXX_SOURCE_COMPILES("${VECTORIZATION_CODE}" COMPILE_OUT_ZVECTOR)
SET(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
if(COMPILE_OUT_ZVECTOR)
message("-- ZVECTOR flags were set.")
set(CXX_ZVECTOR_FOUND TRUE)
SET(CXX_ZVECTOR_FLAGS "${ARCH_SIMD_TEST_FLAGS}" )
else()
message("-- ZVECTOR flags were NOT set.")
endif()
message("-- </FindZVECTOR>")
endif()
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