gcc/testsuite/gcc.target/i386/avx512f-i32gatherd512-2.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_gatherdd (int *res, __mmask16 m16, int *idx,
  11                   int *src, int scale, int *r)
  12 {
  13   int i;
  14
  15   for (i = 0; i < 16; i++)
  16     {
  17       if (m16 & (1 << i))
  18         r[i] = *(int *) (((unsigned char *) src) + idx[i] * scale);
  19       else
  20         r[i] = res[i];
  21     }
  22 }
  23
  24 static void
  25 avx512f_test (void)
  26 {
  27   int i;
  28   union512i_d idx, res;
  29   int src[16];
  30   int res_ref[16];
  31   __mmask16 m16 = 0xBC5D;
  32
  33   for (i = 0; i < 16; i++)
  34     {
  35       src[i] = 1973 * (i + 1) * (i + 2);
  36
  37       /* About to gather in reverse order,
  38          divide by 2 to demonstrate scale */
  39       idx.a[i] = (64 - (i + 1) * 4) >> 1;
  40     }
  41
  42   res.x = _mm512_mask_i32gather_epi32 (res.x, m16, idx.x, src, SCALE);
  43   compute_gatherdd (res.a, m16, idx.a, src, SCALE, res_ref);
  44
  45   if (check_union512i_d (res, res_ref))
  46     abort ();
  47
  48   res.x = _mm512_i32gather_epi32 (idx.x, src, SCALE);
  49   compute_gatherdd (res.a, 0xFFFF, idx.a, src, SCALE, res_ref);
  50
  51   if (check_union512i_d (res, res_ref))
  52     abort ();
  53 }