gcc/testsuite/gcc.target/i386/avx2-vpacksswb-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 char
   8 short_to_byte (short iVal)
   9 {
  10   char sVal;
  11
  12   if (iVal < -128)
  13     sVal = -128;
  14   else if (iVal > 127)
  15     sVal = 127;
  16   else
  17     sVal = iVal;
  18
  19   return sVal;
  20 }
  21
  22 void static
  23 avx2_test (void)
  24 {
  25   union256i_w s1, s2;
  26   union256i_b u;
  27   char e[32];
  28   int i;
  29
  30   s1.x = _mm256_set_epi16 (1, 2, 3, 4, 6500, 20, 30, 90,
  31                            88, 44, 33, 22, 11, 98, 78, -1000);
  32
  33   s2.x = _mm256_set_epi16 (88, 44, 33, 22, 11, 98, 76, -650,
  34                            1, 2, 3, 4, 6500, 20, 30, 90);
  35
  36   u.x = _mm256_packs_epi16 (s1.x, s2.x);
  37
  38   for (i = 0; i < 8; i++)
  39     {
  40       e[i] = short_to_byte (s1.a[i]);
  41       e[i + 8] = short_to_byte (s2.a[i]);
  42       e[i + 16] = short_to_byte (s1.a[i + 8]);
  43       e[i + 24] = short_to_byte (s2.a[i + 8]);
  44     }
  45
  46   if (check_union256i_b (u, e))
  47     abort ();
  48 }