diff options
Diffstat (limited to 'lib/common.h')
| -rw-r--r-- | lib/common.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/lib/common.h b/lib/common.h index 739e647..8ef427e 100644 --- a/lib/common.h +++ b/lib/common.h @@ -155,8 +155,22 @@ /* LIKEYLY and UNLIKELY are used to give a hint on branch prediction to the * compiler. */ #ifndef LIKELY -# define LIKELY -# define UNLIKELY +# if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__) +# define FRIBIDI_BOOLEAN_EXPR(expr) \ + __extension__ ({ \ + int fribidi_bool_var; \ + if (expr) \ + fribidi_bool_var = 1; \ + else \ + fribidi_bool_var = 0; \ + fribidi_bool_var; \ + }) +# define LIKELY(expr) (__builtin_expect (FRIBIDI_BOOLEAN_EXPR(expr), 1)) +# define UNLIKELY(expr) (__builtin_expect (FRIBIDI_BOOLEAN_EXPR(expr), 0)) +# else +# define LIKELY +# define UNLIKELY +# endif /* _GNUC_ */ #endif /* !LIKELY */ #ifndef FRIBIDI_EMPTY_STMT |