diff options
Diffstat (limited to 'vm_core.h')
-rw-r--r-- | vm_core.h | 9 |
1 files changed, 9 insertions, 0 deletions
@@ -97,6 +97,15 @@ #endif /* OPT_STACK_CACHING */ #endif /* OPT_CALL_THREADED_CODE */ +/* likely */ +#if __GNUC__ >= 3 +#define LIKELY(x) (__builtin_expect((x), 1)) +#define UNLIKELY(x) (__builtin_expect((x), 0)) +#else /* __GNUC__ >= 3 */ +#define LIKELY(x) (x) +#define UNLIKELY(x) (x) +#endif /* __GNUC__ >= 3 */ + typedef unsigned long rb_num_t; /* iseq data type */ |