gcc/testsuite/gcc.target/i386/avx512f-i32scatterpd512-2.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_scatterdpd (__mmask8 m8, int *idx, double *src,
  11                     int scale, double *r)
  12 {
  13   int i;
  14
  15   for (i = 0; i < 8; i++)
  16     {
  17       if (m8 & (1 << i))
  18         *(double *) (((unsigned char *) r) + idx[i] * scale) = src[i];
  19     }
  20 }
  21
  22 static void
  23 avx512f_test (void)
  24 {
  25   int i;
  26   union512d src;
  27   union256i_d idx;
  28   double res[8] = { 0.0 };
  29   double res_ref[8] = { 0.0 };
  30   __mmask8 m8 = 0xC5;
  31
  32   for (i = 0; i < 8; i++)
  33     {
  34       src.a[i] = 2.718281828459045 * (i + 1) * (i + 2);
  35
  36       /* About to gather in reverse order,
  37          divide by 2 to demonstrate scale */
  38       idx.a[i] = (64 - (i + 1) * 8) >> 1;
  39     }
  40
  41   _mm512_mask_i32scatter_pd (res, m8, idx.x, src.x, SCALE);
  42   compute_scatterdpd (m8, idx.a, src.a, SCALE, res_ref);
  43
  44   if (checkVd (res, res_ref, 8))
  45     abort ();
  46
  47   _mm512_i32scatter_pd (res, idx.x, src.x, SCALE);
  48   compute_scatterdpd (0xFF, idx.a, src.a, SCALE, res_ref);
  49
  50   if (checkVd (res, res_ref, 8))
  51     abort ();
  52 }