1  /* { dg-do run } */
       2  /* { dg-require-effective-target avx2 } */
       3  /* { dg-options "-O2 -mavx2" } */
       4  
       5  #include <string.h>
       6  #include "avx2-check.h"
       7  
       8  static void
       9  compute_i32gatherps256 (float *s1, int *s2, int scale, float *r)
      10  {
      11    int i;
      12  
      13    for (i = 0; i < 8; ++i)
      14      r[i] = *(float *) (((unsigned char *) s1) + s2[i] * scale);
      15  }
      16  
      17  void static
      18  avx2_test (void)
      19  {
      20    int i;
      21    union256i_d idx;
      22    union256 res;
      23    float s1[8], res_ref[8] = { 0 };
      24  
      25    for (i = 0; i < 8; ++i)
      26      {
      27        /* Set some stuff */
      28        s1[i] = 2.718281828459045 * (i + 1) * (i + 2);
      29  
      30        /* About to gather in reverse order,
      31           divide by 2 to demonstrate scale */
      32        idx.a[i] = (32 - (i + 1) * 4) >> 1;
      33      }
      34  
      35    res.x = _mm256_i32gather_ps (s1, idx.x, 2);
      36  
      37    compute_i32gatherps256 (s1, idx.a, 2, res_ref);
      38  
      39    if (check_union256 (res, res_ref) != 0)
      40      abort ();
      41  }