1 /* Test that __builtin_prefetch does no harm.
3 Prefetch using all valid combinations of rw and locality values.
4 These must be compile-time constants. */
6 #define NO_TEMPORAL_LOCALITY 0
7 #define LOW_TEMPORAL_LOCALITY 1
8 #define MODERATE_TEMPORAL_LOCALITY 1
9 #define HIGH_TEMPORAL_LOCALITY 3
11 #define WRITE_ACCESS 1
14 enum locality { none, low, moderate, high };
15 enum rw { read, write };
20 good_const (const int *p)
22 __builtin_prefetch (p, 0, 0);
23 __builtin_prefetch (p, 0, 1);
24 __builtin_prefetch (p, 0, 2);
25 __builtin_prefetch (p, READ_ACCESS, 3);
26 __builtin_prefetch (p, 1, NO_TEMPORAL_LOCALITY);
27 __builtin_prefetch (p, 1, LOW_TEMPORAL_LOCALITY);
28 __builtin_prefetch (p, 1, MODERATE_TEMPORAL_LOCALITY);
29 __builtin_prefetch (p, WRITE_ACCESS, HIGH_TEMPORAL_LOCALITY);
33 good_enum (const int *p)
35 __builtin_prefetch (p, read, none);
36 __builtin_prefetch (p, read, low);
37 __builtin_prefetch (p, read, moderate);
38 __builtin_prefetch (p, read, high);
39 __builtin_prefetch (p, write, none);
40 __builtin_prefetch (p, write, low);
41 __builtin_prefetch (p, write, moderate);
42 __builtin_prefetch (p, write, high);
46 good_expr (const int *p)
48 __builtin_prefetch (p, 1 - 1, 6 - (2 * 3));
49 __builtin_prefetch (p, 1 + 0, 1 + 2);
53 good_vararg (const int *p)
55 __builtin_prefetch (p, 0, 3);
56 __builtin_prefetch (p, 0);
57 __builtin_prefetch (p, 1);
58 __builtin_prefetch (p);