1  /* { dg-do run } */
       2  /* { dg-require-effective-target avx } */
       3  /* { dg-options "-O2 -ftree-vectorize -mavx -mtune=generic" } */
       4  
       5  #include "avx-check.h"
       6  
       7  #define N 16
       8  
       9  float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
      10  float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
      11  float d[N] = {0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30};
      12  
      13  static void
      14  __attribute__ ((noinline))
      15  avx_test ()
      16  {
      17    int i;
      18    float a[N];
      19  
      20    /* Strided access. Vectorizable on platforms that support load of strided 
      21       accesses (extract of even/odd vector elements).  */
      22    for (i = 0; i < N/2; i++)
      23      {
      24        a[i] = b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i];
      25        d[i] = b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i];
      26      }
      27  
      28    /* Check results.  */
      29    for (i = 0; i < N/2; i++)
      30      {
      31        if (a[i] != b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i]
      32  	  || d[i] != b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i])
      33  	abort();
      34      }
      35  }