OpenCV_4.2.0/opencv-4.2.0/cmake/checks/cpu_sse41.cpp

#include <smmintrin.h>
int main() {
    __m128i a = _mm_setzero_si128(), b = _mm_setzero_si128();
    __m128i c = _mm_packus_epi32(a, b);
    return 0;
}