diff options
| -rw-r--r-- | lib/replace/replace.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/replace/replace.h b/lib/replace/replace.h index 2db6aa1226..6424d10c0f 100644 --- a/lib/replace/replace.h +++ b/lib/replace/replace.h @@ -704,4 +704,23 @@ char *ufc_crypt(const char *key, const char *salt); #endif #endif +/* these macros gain us a few percent of speed on gcc */ +#if (__GNUC__ >= 3) +/* the strange !! is to ensure that __builtin_expect() takes either 0 or 1 + as its first argument */ +#ifndef likely +#define likely(x) __builtin_expect(!!(x), 1) +#endif +#ifndef unlikely +#define unlikely(x) __builtin_expect(!!(x), 0) +#endif +#else +#ifndef likely +#define likely(x) (x) +#endif +#ifndef unlikely +#define unlikely(x) (x) +#endif +#endif + #endif /* _LIBREPLACE_REPLACE_H */ |