gcc/testsuite/gcc.target/i386/avx2-i32gatherd-4.c

/* { dg-do run } */
/* { dg-require-effective-target avx2 } */
/* { dg-options "-O2 -mavx2" } */

#include <string.h>
#include "avx2-check.h"

static void
compute_i32gatherd (int *src, int *s1, int *s2, int *mask, int scale, int *r)
{
  int i;

  for (i = 0; i < 4; ++i)
    if ((mask[i] >> 31) & 1)
      r[i] = *(int *) (((unsigned char *) s1) + s2[i] * scale);
    else
      r[i] = src[i];
}

void static
avx2_test (void)
{
  int i;
  union128i_d idx;
  union128i_d res, src, mask;
  int s1[4], res_ref[4] = { 0 };

  for (i = 0; i < 4; ++i)
    {
      /* Set some stuff */
      s1[i] = 1973 * (i + 1) * (i + 2);

      /* Set src as something different from s1 */
      src.a[i] = -s1[i];

      /* Mask out evens */
      ((int *) mask.a)[i] = i % 2 ? 0 : -1;

      /* About to gather in reverse order,
         divide by 2 to demonstrate scale */
      idx.a[i] = (16 - (i + 1) * 4) >> 1;
    }

  res.x = _mm_mask_i32gather_epi32 (src.x, s1, idx.x, mask.x, 2);

  compute_i32gatherd (src.a, s1, idx.a, mask.a, 2, res_ref);

  if (check_union128i_d (res, res_ref) != 0)
    abort ();
}