gcc/testsuite/gcc.target/i386/avx512f-i64gatherq512-2.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_gatherqq (long long *res, __mmask8 m8, long long *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   union512i_q idx, res;
  30   long long src[8];
  31   long long res_ref[8];
  32   __mmask8 m8 = 0xC5;
  33
  34   for (i = 0; i < 8; i++)
  35     {
  36       src[i] = 1983 * (i + 1) * (i + 2);
  37
  38       /* About to gather in reverse order,
  39          divide by 2 to demonstrate scale */
  40       idx.a[i] = (64 - (i + 1) * 8) >> 1;
  41     }
  42
  43   res.x = _mm512_mask_i64gather_epi64 (res.x, m8, idx.x, src, SCALE);
  44   compute_gatherqq (res.a, m8, idx.a, src, SCALE, res_ref);
  45
  46   if (check_union512i_q (res, res_ref))
  47     abort ();
  48
  49   res.x = _mm512_i64gather_epi64 (idx.x, src, SCALE);
  50   compute_gatherqq (res.a, 0xFF, idx.a, src, SCALE, res_ref);
  51
  52   if (check_union512i_q (res, res_ref))
  53     abort ();
  54 }