libgomp/testsuite/libgomp.oacc-c-c++-common/routine-g-1.c

   1 /* This code uses nvptx inline assembly guarded with acc_on_device, which is
   2    not optimized away at -O0, and then confuses the target assembler.
   3    { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
   4
   5 #include <stdio.h>
   6
   7 #define N (32*32*32+17)
   8
   9 #pragma acc routine gang
  10 void __attribute__ ((noinline)) gang (int ary[N])
  11 {
  12 #pragma acc loop gang
  13     for (unsigned ix = 0; ix < N; ix++)
  14       {
  15         if (__builtin_acc_on_device (5))
  16           {
  17             int g = 0, w = 0, v = 0;
  18
  19             __asm__ volatile ("mov.u32 %0,%%ctaid.x;" : "=r" (g));
  20             __asm__ volatile ("mov.u32 %0,%%tid.y;" : "=r" (w));
  21             __asm__ volatile ("mov.u32 %0,%%tid.x;" : "=r" (v));
  22             ary[ix] = (g << 16) | (w << 8) | v;
  23           }
  24         else
  25           ary[ix] = ix;
  26       }
  27 }
  28
  29 int main ()
  30 {
  31   int ary[N];
  32   int ix;
  33   int exit = 0;
  34   int ondev = 0;
  35
  36   for (ix = 0; ix < N;ix++)
  37     ary[ix] = -1;
  38
  39 #pragma acc parallel num_gangs(32) vector_length(32) copy(ary) copy(ondev)
  40   {
  41     ondev = __builtin_acc_on_device (5);
  42     gang (ary);
  43   }
  44
  45   for (ix = 0; ix < N; ix++)
  46     {
  47       int expected = ix;
  48       if(ondev)
  49         {
  50           int g = ix / ((N + 31) / 32);
  51           int w = 0;
  52           int v = 0;
  53
  54           expected = (g << 16) | (w << 8) | v;
  55         }
  56
  57       if (ary[ix] != expected)
  58         {
  59           exit = 1;
  60           printf ("ary[%d]=%x expected %x\n", ix, ary[ix], expected);
  61         }
  62     }
  63
  64   return exit;
  65 }