speed_test_simd.c

#include <immintrin.h>
const int NUM = 1000000;
static float X[NUM], Y[NUM], Z[NUM];
void dig_hole() {
    __m128 a,b,c;
    for(int j = 0; j < 1000; j++) {
        for(int i = 0; i < NUM; i += 4) {
            a = _mm_load_ps(&X[i]);
            b = _mm_load_ps(&Y[i]);
            c = _mm_add_ps(a, b);
            _mm_store_ps(&Z[i], c);
        }
    }
}
int main() {
    dig_hole();
}