gcc/testsuite/gcc.target/i386/avx2-vpsubsb-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   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,
  16                           76, -100, -34, -78, -39, 6, 3, 4, 5, 119);
  17
  18   s2.x = _mm256_set_epi8 (88, 44, 33, 22, 11, 98, 76, -100, -34, -78,
  19                           -39, 6, 3, 4, 5, 119, 1, 2, 3, 4, 10, 20,
  20                           30, 90, -80, -40, -100, -15, 98, 25, 98, 7);
  21
  22   u.x = _mm256_subs_epi8 (s1.x, s2.x);
  23
  24   for (i = 0; i < 32; i++)
  25     {
  26       tmp = s1.a[i] - s2.a[i];
  27
  28       if (tmp > 127)
  29         tmp = 127;
  30       if (tmp < -128)
  31         tmp = -128;
  32
  33       e[i] = tmp;
  34     }
  35
  36   if (check_union256i_b (u, e))
  37     abort ();
  38 }