1  #include <stdlib.h>
       2  
       3  #define N ((1024 * 512) + 1)
       4  #define COUNTERTYPE unsigned int
       5  
       6  int
       7  main (void)
       8  {
       9    unsigned int *__restrict a;
      10    unsigned int *__restrict b;
      11    unsigned int *__restrict c;
      12  
      13    a = (unsigned int *__restrict)malloc (N * sizeof (unsigned int));
      14    b = (unsigned int *__restrict)malloc (N * sizeof (unsigned int));
      15    c = (unsigned int *__restrict)malloc (N * sizeof (unsigned int));
      16  
      17    for (COUNTERTYPE i = 0; i < N; i++)
      18      a[i] = i * 2;
      19  
      20    for (COUNTERTYPE i = 0; i < N; i++)
      21      b[i] = i * 4;
      22  
      23  #pragma acc kernels copyin (a[0:N], b[0:N]) copyout (c[0:N])
      24    {
      25      for (COUNTERTYPE ii = 0; ii < N; ii++)
      26        c[ii] = a[ii] + b[ii];
      27    }
      28  
      29    for (COUNTERTYPE i = 0; i < N; i++)
      30      if (c[i] != a[i] + b[i])
      31        abort ();
      32  
      33    free (a);
      34    free (b);
      35    free (c);
      36  
      37    return 0;
      38  }