check_cxx_source_compiles("
#include <emmintrin.h>

int main() {
  __m128i* one=(__m128i*)_mm_malloc(4, 16);
  __m128i* two=(__m128i*)_mm_malloc(4, 16);
  __m128i xmm1 = _mm_load_si128(one);
  __m128i xmm2 = _mm_load_si128(two);
  __m128i xmm3 = _mm_or_si128(xmm1, xmm2);
  _mm_store_si128(one, xmm3);
  _mm_free(one);
  _mm_free(two);
  return 0;
}"
    XERCES_HAVE_SSE2_INTRINSIC)