1  /* { dg-do run } */
       2  /* { dg-require-effective-target avx2 } */
       3  /* { dg-options "-O2 -mavx2" } */
       4  
       5  #include <string.h>
       6  #include "avx2-check.h"
       7  
       8  static void
       9  compute_sadbw256 (unsigned char *s1, unsigned char *s2, unsigned short *r)
      10  {
      11    int i;
      12    unsigned char tmp[32];
      13  
      14    for (i = 0; i < 32; i++)
      15      tmp[i] = s1[i] > s2[i] ? s1[i] - s2[i] : s2[i] - s1[i];
      16  
      17    memset (r, 0, 32);
      18  
      19    for (i = 0; i < 8; i++)
      20      r[0] += tmp[i];
      21  
      22    for (i = 8; i < 16; i++)
      23      r[4] += tmp[i];
      24  
      25    for (i = 16; i < 24; i++)
      26      r[8] += tmp[i];
      27  
      28    for (i = 24; i < 32; i++)
      29      r[12] += tmp[i];
      30  }
      31  
      32  void static
      33  avx2_test (void)
      34  {
      35    union256i_b s1, s2;
      36    union256i_w res;
      37    unsigned short res_ref[16];
      38    int i, j;
      39    int fail = 0;
      40  
      41    for (i = 0; i < 10; i++)
      42      {
      43        for (j = 0; j < 32; j++)
      44  	{
      45  	  s1.a[j] = j * i;
      46  	  s2.a[j] = j + 20;
      47  	}
      48  
      49        res.x = _mm256_sad_epu8 (s1.x, s2.x);;
      50        compute_sadbw256 (s1.a, s2.a, res_ref);
      51  
      52        fail += check_union256i_w (res, res_ref);
      53      }
      54  
      55    if (fail != 0)
      56      abort ();
      57  }