cmake HAVE_SSE4_2_EXTENSIONS examples

soedinglab/hh-suite cmake/CheckSSEFeatures.cmake :30 

check_cxx_source_runs("
      #include <nmmintrin.h>
      int main ()
      {
        long long a[2] = {  1, 2 };
        long long b[2] = { -1, 3 };
        long long c[2];
        __m128i va = _mm_loadu_si128 ((__m128i*)a);
        __m128i vb = _mm_loadu_si128 ((__m128i*)b);
        __m128i vc = _mm_cmpgt_epi64 (va, vb);
        _mm_storeu_si128 ((__m128i*)c, vc);
        return 0;
      }"
            HAVE_SSE4_2_EXTENSIONS)

soedinglab/hh-suite cmake/CheckSSEFeatures.cmake :114 

elseif(HAVE_SSE4_2_EXTENSIONS)