gcc/testsuite/gcc.target/i386/avx2-vpabsw256-2.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target avx2 } */
   3 /* { dg-options "-O2 -mavx2" } */
   4
   5 #include "ssse3-vals.h"
   6 #include "avx2-check.h"
   7
   8 /* Routine to manually compute the results */
   9 static void
  10 compute_pabs256 (int *i1, short *r)
  11 {
  12   short *b1 = (short *) i1;
  13   int i;
  14
  15   for (i = 0; i < 16; i++)
  16     if (b1[i] < 0)
  17       r[i] = -b1[i];
  18     else
  19       r[i] = b1[i];
  20 }
  21
  22 static void
  23 avx2_test (void)
  24 {
  25   int i;
  26   short ck[16];
  27   int fail = 0;
  28
  29   union256i_w s, d;
  30
  31   for (i = 0; i < 256; ++i)
  32     {
  33       /* Using only first 2 bytes of int */
  34       /* Recompute the results for 256-bits */
  35       compute_pabs256 (&vals[i], ck);
  36
  37       s.x = _mm256_loadu_si256 ((__m256i *) & vals[i]);
  38
  39       /* Run the 256-bit tests */
  40       d.x = _mm256_abs_epi16 (s.x);
  41
  42       fail += check_union256i_w (d, ck);
  43     }
  44
  45   if (fail != 0)
  46     abort ();
  47 }