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// mask_load.c
// ref: https://www.codeproject.com/Articles/874396/Crunching-Numbers-with-AVX-and-AVX
//
// usage: gcc -mavx2 -o mask_load mask_load.c
#include <immintrin.h>
#include <stdio.h>

int main() {

  int i;
  
  int int_array[8] = {100, 200, 300, 400, 500, 600, 700, 800};
  
  /* Initialize the mask vector */
  __m256i mask = _mm256_setr_epi32(-20, -72, -48, -9, -100, 3, 5, 8);

  /* Selectively load data into the vector */
  __m256i result = _mm256_maskload_epi32(int_array, mask);
  
  /* Display the elements of the result vector */
  int* res = (int*)&result;
  printf("%d %d %d %d %d %d %d %d\n", 
    res[0], res[1], res[2], res[3], res[4], res[5], res[6], res[7]);
  
  return 0;
}