Subversion Repositories openrisc_me

/* Test that __builtin_prefetch does no harm.

   Use addresses that are unlikely to be word-aligned.  Some targets

   have alignment requirements for prefetch addresses, so make sure the

   compiler takes care of that.  This fails if it aborts, anything else

   is OK.  */

struct S {

  short a;

  short b;

  char c[8];

} s;

char arr[100];

char *ptr = arr;

int idx = 3;

void

arg_ptr (char *p)

{

  __builtin_prefetch (p, 0, 0);

}

void

arg_idx (char *p, int i)

{

  __builtin_prefetch (&p[i], 0, 0);

}

void

glob_ptr (void)

{

  __builtin_prefetch (ptr, 0, 0);

}

void

glob_idx (void)

{

  __builtin_prefetch (&ptr[idx], 0, 0);

}

int

main ()

{

  __builtin_prefetch (&s.b, 0, 0);

  __builtin_prefetch (&s.c[1], 0, 0);

  arg_ptr (&s.c[1]);

  arg_ptr (ptr+3);

  arg_idx (ptr, 3);

  arg_idx (ptr+1, 2);

  idx = 3;

  glob_ptr ();

  glob_idx ();

  ptr++;

  idx = 2;

  glob_ptr ();

  glob_idx ();

  exit (0);

}