gcc/testsuite/gcc.target/i386/avx512f-i64gatherps512-2.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_gatherqps (float *res, __mmask8 m8, long long *idx,
  11                    float *src, int scale, float *r)
  12 {
  13   int i;
  14
  15   for (i = 0; i < 8; i++)
  16     {
  17       if (m8 & (1 << i))
  18         r[i] = *(float *) (((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   union256 res;
  29   union512i_q idx;
  30   float src[8];
  31   float res_ref[8];
  32   __mmask8 m8 = 0xC5;
  33
  34   res.x = _mm256_setzero_ps();
  35
  36   for (i = 0; i < 8; i++)
  37     {
  38       src[i] = 2.718281828459045 * (i + 1) * (i + 2);
  39
  40       /* About to gather in reverse order,
  41          divide by 2 to demonstrate scale */
  42       idx.a[i] = (32 - (i + 1) * 4) >> 1;
  43     }
  44
  45   res.x = _mm512_mask_i64gather_ps (res.x, m8, idx.x, src, SCALE);
  46   compute_gatherqps (res.a, m8, idx.a, src, SCALE, res_ref);
  47
  48   if (check_union256 (res, res_ref))
  49     abort ();
  50
  51   res.x = _mm512_i64gather_ps (idx.x, src, SCALE);
  52   compute_gatherqps (res.a, 0xFF, idx.a, src, SCALE, res_ref);
  53
  54   if (check_union256 (res, res_ref))
  55     abort ();
  56 }