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_i32gatherpd (double *src,
      10  		     double *s1, int *s2, double *mask, int scale, double *r)
      11  {
      12    int i;
      13  
      14    for (i = 0; i < 2; ++i)
      15      if ((((long long *) mask)[i] >> 63) & 1)
      16        r[i] = *(double *) (((unsigned char *) s1) + s2[i] * scale);
      17      else
      18        r[i] = src[i];
      19  }
      20  
      21  void static
      22  avx2_test (void)
      23  {
      24    int i;
      25    union128i_d idx;
      26    union128d res, src, mask;
      27    double s1[2], res_ref[2] = { 0 };
      28  
      29    for (i = 0; i < 2; ++i)
      30      {
      31        /* Set some stuff */
      32        s1[i] = 2.718281828459045 * (i + 1) * (i + 2);
      33  
      34        /* Set src as something different from s1 */
      35        src.a[i] = -s1[i];
      36  
      37        /* Mask out evens */
      38        ((long long *) mask.a)[i] = i % 2 ? 0 : -1;
      39  
      40        /* About to gather in reverse order,
      41           divide by 2 to demonstrate scale */
      42        idx.a[i] = (16 - (i + 1) * 8) >> 1;
      43      }
      44  
      45    res.x = _mm_mask_i32gather_pd (src.x, s1, idx.x, mask.x, 2);
      46  
      47    compute_i32gatherpd (src.a, s1, idx.a, mask.a, 2, res_ref);
      48  
      49    if (check_union128d (res, res_ref) != 0)
      50      abort ();
      51  }