diff options
| author | Mike Antipov <mantipov@productengine.com> | 2010-01-26 09:36:40 +0200 |
|---|---|---|
| committer | Mike Antipov <mantipov@productengine.com> | 2010-01-26 09:36:40 +0200 |
| commit | 04729c1cd581e985247e5537fdcd46d78e5a9f1c (patch) | |
| tree | c8368ccb8e00e6128c9ef453a7f106ef433d0abc /indra/llcommon/llpreprocessor.h | |
| parent | 5d7497aab21f9cfcd8b86c73c27dce33e8409841 (diff) | |
| parent | fbf605ea321ee29afad63a4afe47f65584d67eea (diff) | |
Merge with default branch
--HG--
branch : product-engine
Diffstat (limited to 'indra/llcommon/llpreprocessor.h')
| -rw-r--r-- | indra/llcommon/llpreprocessor.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/indra/llcommon/llpreprocessor.h b/indra/llcommon/llpreprocessor.h index 5eefa6a16b..1c1503ca7b 100644 --- a/indra/llcommon/llpreprocessor.h +++ b/indra/llcommon/llpreprocessor.h @@ -55,13 +55,28 @@ #define LL_BIG_ENDIAN 1 #endif + // Per-compiler switches + #ifdef __GNUC__ #define LL_FORCE_INLINE inline __attribute__((always_inline)) #else #define LL_FORCE_INLINE __forceinline #endif +// Mark-up expressions with branch prediction hints. Do NOT use +// this with reckless abandon - it's an obfuscating micro-optimization +// outside of inner loops or other places where you are OVERWHELMINGLY +// sure which way an expression almost-always evaluates. +#if __GNUC__ >= 3 +# define LL_LIKELY(EXPR) __builtin_expect (!!(EXPR), true) +# define LL_UNLIKELY(EXPR) __builtin_expect (!!(EXPR), false) +#else +# define LL_LIKELY(EXPR) (EXPR) +# define LL_UNLIKELY(EXPR) (EXPR) +#endif + + // Figure out differences between compilers #if defined(__GNUC__) #define GCC_VERSION (__GNUC__ * 10000 \ |