gcc/testsuite/gcc.target/i386/avx512f-i32gatherq512-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-mavx512f -O2" } */
   3 /* { dg-require-effective-target avx512f } */
   4
   5 #include "avx512f-check.h"
   6
   7 #define SCALE 2
   8
   9 static void
  10 compute_gatherdq (long long *res, __mmask8 m8, int *idx,
  11                   long long *src, int scale, long long *r)
  12 {
  13   int i;
  14
  15   for (i = 0; i < 8; i++)
  16     {
  17       if (m8 & (1 << i))
  18         r[i] = *(long long *)
  19           (((unsigned char *) src) + idx[i] * scale);
  20       else
  21         r[i] = res[i];
  22     }
  23 }
  24
  25 static void
  26 avx512f_test (void)
  27 {
  28   int i;
  29   union256i_d idx;
  30   union512i_q res;
  31   long long src[8];
  32   long long res_ref[8];
  33   __mmask8 m8 = 0xC5;
  34
  35   for (i = 0; i < 8; i++)
  36     {
  37       src[i] = 1983 * (i + 1) * (i + 2);
  38
  39       /* About to gather in reverse order,
  40          divide by 2 to demonstrate scale */
  41       idx.a[i] = (64 - (i + 1) * 8) >> 1;
  42     }
  43
  44   res.x = _mm512_mask_i32gather_epi64 (res.x, m8, idx.x, src, SCALE);
  45   compute_gatherdq (res.a, m8, idx.a, src, SCALE, res_ref);
  46
  47   if (check_union512i_q (res, res_ref))
  48     abort ();
  49
  50   res.x = _mm512_i32gather_epi64 (idx.x, src, SCALE);
  51   compute_gatherdq (res.a, 0xFF, idx.a, src, SCALE, res_ref);
  52
  53   if (check_union512i_q (res, res_ref))
  54     abort ();
  55 }