gcc/testsuite/gcc.target/i386/avx2-vpmulhrsw-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-mavx2 -O2" } */
   3 /* { dg-require-effective-target avx2 } */
   4
   5 #include "avx2-check.h"
   6
   7 static void
   8 compute_pmulhrsw256 (short *s1, short *s2, short *r)
   9 {
  10   int i;
  11   int t0;
  12
  13   for (i = 0; i < 16; i++)
  14     {
  15       t0 = (((int) s1[i] * (int) s2[i]) >> 14) + 1;
  16       r[i] = (short) (t0 >> 1);
  17     }
  18 }
  19
  20 static void
  21 avx2_test (void)
  22 {
  23   union256i_w s1, s2, res;
  24   short res_ref[16];
  25   int i, j, sign = 1;
  26   int fail = 0;
  27
  28   for (i = 0; i < 10; i++)
  29     {
  30       for (j = 0; j < 16; j++)
  31         {
  32           s1.a[j] = i * j * sign;
  33           s2.a[j] = (j + 20) * sign;
  34           sign = -sign;
  35         }
  36
  37       res.x = _mm256_mulhrs_epi16 (s1.x, s2.x);
  38
  39       compute_pmulhrsw256 (s1.a, s2.a, res_ref);
  40
  41       fail += check_union256i_w (res, res_ref);
  42     }
  43
  44   if (fail != 0)
  45     abort ();
  46 }