gcc/testsuite/gcc.target/i386/avx2-i64gatherq-4.c

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

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

static void
compute_i64gatherpd (long long *src,
		     long long *s1,
		     long long *s2, long long *mask, int scale, long long *r)
{
  long long i;

  for (i = 0; i < 2; ++i)
    if ((mask[i] >> 63) & 1)
      r[i] = *(long long *) (((unsigned char *) s1) + s2[i] * scale);
    else
      r[i] = src[i];
}

void static
avx2_test (void)
{
  long long i;
  union128i_q idx;
  union128i_q res, src, mask;
  long long s1[2], res_ref[2] = { 0, 0 };

  for (i = 0; i < 2; ++i)
    {
      /* Set some stuff */
      s1[i] = 1983 * (i + 1) * (i + 2);

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

      /* Mask out evens */
      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) * 8) >> 1;
    }

  res.x =
    _mm_mask_i64gather_epi64 (src.x, (long long int *) s1, idx.x, mask.x, 2);

  compute_i64gatherpd (src.a, s1, idx.a, mask.a, 2, res_ref);

  if (check_union128i_q (res, res_ref) != 0)
    abort ();
}