1  /* { dg-do run } */
       2  /* { dg-options "-mavx2 -O2" } */
       3  /* { dg-require-effective-target avx2 } */
       4  
       5  #include "avx2-check.h"
       6  #include "ssse3-vals.h"
       7  
       8  static short
       9  signed_saturate_to_word (int x)
      10  {
      11    if (x > (int) 0x7fff)
      12      return 0x7fff;
      13  
      14    if (x < (int) 0xffff8000)
      15      return 0x8000;
      16  
      17    return (short) x;
      18  }
      19  
      20  static void
      21  compute_pmaddubsw256 (short *i1, short *i2, short *r)
      22  {
      23    unsigned char *ub1 = (unsigned char *) i1;
      24    char *sb2 = (char *) i2;
      25    short *sout = (short *) r;
      26    int t0;
      27    int i;
      28  
      29    for (i = 0; i < 16; i++)
      30      {
      31        t0 = ((int) ub1[2 * i] * (int) sb2[2 * i] +
      32  	    (int) ub1[2 * i + 1] * (int) sb2[2 * i + 1]);
      33        sout[i] = signed_saturate_to_word (t0);
      34      }
      35  }
      36  
      37  static void
      38  avx2_test (void)
      39  {
      40    union256i_w s1, s2, res;
      41    short res_ref[16];
      42    int i;
      43    int fail = 0;
      44  
      45    for (i = 0; i < 256; i += 16)
      46      {
      47        s1.x = _mm256_loadu_si256 ((__m256i *) & vals[i]);
      48        s2.x = _mm256_loadu_si256 ((__m256i *) & vals[i + 8]);
      49  
      50        res.x = _mm256_maddubs_epi16 (s1.x, s2.x);
      51  
      52        compute_pmaddubsw256 (s1.a, s2.a, res_ref);
      53  
      54        fail += check_union256i_w (res, res_ref);
      55      }
      56  
      57    if (fail != 0)
      58      abort ();
      59  }