Subversion Repositories openrisc

/* Test that __builtin_prefetch does no harm.

   Prefetch using all valid combinations of rw and locality values.

   These must be compile-time constants.  */

#define NO_TEMPORAL_LOCALITY 0

#define LOW_TEMPORAL_LOCALITY 1

#define MODERATE_TEMPORAL_LOCALITY 1

#define HIGH_TEMPORAL_LOCALITY 3

#define WRITE_ACCESS 1

#define READ_ACCESS 0

enum locality { none, low, moderate, high };

enum rw { read, write };

int arr[10];

void

good_const (const int *p)

{

  __builtin_prefetch (p, 0, 0);

  __builtin_prefetch (p, 0, 1);

  __builtin_prefetch (p, 0, 2);

  __builtin_prefetch (p, READ_ACCESS, 3);

  __builtin_prefetch (p, 1, NO_TEMPORAL_LOCALITY);

  __builtin_prefetch (p, 1, LOW_TEMPORAL_LOCALITY);

  __builtin_prefetch (p, 1, MODERATE_TEMPORAL_LOCALITY);

  __builtin_prefetch (p, WRITE_ACCESS, HIGH_TEMPORAL_LOCALITY);

}

void

good_enum (const int *p)

{

    __builtin_prefetch (p, read, none);

    __builtin_prefetch (p, read, low);

    __builtin_prefetch (p, read, moderate);

    __builtin_prefetch (p, read, high);

    __builtin_prefetch (p, write, none);

    __builtin_prefetch (p, write, low);

    __builtin_prefetch (p, write, moderate);

    __builtin_prefetch (p, write, high);

}

void

good_expr (const int *p)

{

  __builtin_prefetch (p, 1 - 1, 6 - (2 * 3));

  __builtin_prefetch (p, 1 + 0, 1 + 2);

}

void

good_vararg (const int *p)

{

  __builtin_prefetch (p, 0, 3);

  __builtin_prefetch (p, 0);

  __builtin_prefetch (p, 1);

  __builtin_prefetch (p);

}

int

main ()

{

  good_const (arr);

  good_enum (arr);

  good_expr (arr);

  good_vararg (arr);

  exit (0);

}