gcc/testsuite/gcc.target/i386/avx2-vpsubusb-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 void static
   8 avx2_test (void)
   9 {
  10   union256i_b u, s1, s2;
  11   unsigned char e[32];
  12   int i, tmp;
  13
  14   s1.x = _mm256_set_epi8 (1, 2, 3, 4, 10, 20, 30, 90, 80, 40, 100, 15,
  15                           98, 25, 98, 7, 88, 44, 33, 22, 11, 98, 76,
  16                           200, 34, 78, 39, 6, 3, 4, 5, 119);
  17
  18   s2.x = _mm256_set_epi8 (88, 44, 33, 220, 11, 98, 76, 100, 34, 78, 39,
  19                           6, 3, 4, 5, 219, 1, 2, 3, 4, 10, 20, 30, 90,
  20                           80, 40, 100, 15, 98, 25, 98, 7);
  21
  22   u.x = _mm256_subs_epu8 (s1.x, s2.x);
  23
  24   for (i = 0; i < 32; i++)
  25     {
  26       tmp = (unsigned char) s1.a[i] - (unsigned char) s2.a[i];
  27
  28       if (tmp < 0)
  29         tmp = 0;
  30
  31       e[i] = tmp;
  32     }
  33
  34   if (check_union256i_b (u, e))
  35     abort ();
  36 }