libgomp/testsuite/libgomp.oacc-c-c++-common/loop-red-w-2.c

   1 #include <stdio.h>
   2 #include <openacc.h>
   3 #include <gomp-constants.h>
   4
   5 #define N (32*32*32+17)
   6 int main ()
   7 {
   8   int ix;
   9   int ondev = 0;
  10   int q = 0,  h = 0;
  11
  12 #pragma acc parallel num_workers(32) vector_length(32) copy(q) copy(ondev)
  13   {
  14     int t = q;
  15
  16 #pragma acc loop worker reduction(+:t)
  17     for (unsigned ix = 0; ix < N; ix++)
  18       {
  19         int val = ix;
  20
  21         if (acc_on_device (acc_device_not_host))
  22           {
  23             int g, w, v;
  24
  25             g = __builtin_goacc_parlevel_id (GOMP_DIM_GANG);
  26             w = __builtin_goacc_parlevel_id (GOMP_DIM_WORKER);
  27             v = __builtin_goacc_parlevel_id (GOMP_DIM_VECTOR);
  28             val = (g << 16) | (w << 8) | v;
  29             ondev = 1;
  30           }
  31         t += val;
  32       }
  33     q = t;
  34   }
  35
  36   for (ix = 0; ix < N; ix++)
  37     {
  38       int val = ix;
  39       if(ondev)
  40         {
  41           int g = 0;
  42           int w = ix % 32;
  43           int v = 0;
  44
  45           val = (g << 16) | (w << 8) | v;
  46         }
  47       h += val;
  48     }
  49   if (q != h)
  50     {
  51       printf ("t=%x expected %x\n", q, h);
  52       return 1;
  53     }
  54
  55   return 0;
  56 }