cmake HAVE_SSE2_EXTENSIONS examples

Warzone2100/warzone2100 .ci/vcpkg/overlay-ports/angle/cmake-buildsystem/cmake/DetectSSE2.cmake :41

check_cxx_source_runs("
        #include <emmintrin.h>
        int main ()
        {
            __m128d a, b;
            double vals[2] = {0};
            a = _mm_loadu_pd (vals);
            b = _mm_add_pd (a,a);
            _mm_storeu_pd (vals,b);
            return 0;
        }"
            HAVE_SSE2_EXTENSIONS)

soedinglab/hh-suite cmake/CheckSSEFeatures.cmake :73

check_cxx_source_runs("
        #include <emmintrin.h>
        int main ()
        {
            volatile __m128d a, b;
            double vals[2] = {0};
            a = _mm_loadu_pd (vals);
            b = _mm_add_pd (a,a);
            _mm_storeu_pd (vals,b);
            return (0);
        }"
            HAVE_SSE2_EXTENSIONS)

soedinglab/hh-suite cmake/CheckSSEFeatures.cmake :120

elseif(HAVE_SSE2_EXTENSIONS)