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| author | Paul Sokolovsky <pfalcon@users.sourceforge.net> | 2014-12-29 00:51:06 +0200 |
|---|---|---|
| committer | Paul Sokolovsky <pfalcon@users.sourceforge.net> | 2014-12-29 00:51:24 +0200 |
| commit | 361909e3ca8a44632c918aeed2c3426b970068fc (patch) | |
| tree | c23599a085647767e83f903f2f999e7ba42256d2 /py/mpconfig.h | |
| parent | 1ee1785bed2dc899d92c15047face797f859f1c9 (diff) | |
| download | micropython-361909e3ca8a44632c918aeed2c3426b970068fc.tar.gz micropython-361909e3ca8a44632c918aeed2c3426b970068fc.zip | |
py: Add MP_LIKELY(), MP_UNLIKELY() macros to help branch prediction.v1.3.8
Diffstat (limited to 'py/mpconfig.h')
| -rw-r--r-- | py/mpconfig.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/py/mpconfig.h b/py/mpconfig.h index 170033240e..76f31e48e9 100644 --- a/py/mpconfig.h +++ b/py/mpconfig.h @@ -562,3 +562,13 @@ typedef double mp_float_t; #ifndef MP_WEAK #define MP_WEAK __attribute__((weak)) #endif + +// Condition is likely to be true, to help branch prediction +#ifndef MP_LIKELY +#define MP_LIKELY(x) __builtin_expect((x), 1) +#endif + +// Condition is likely to be false, to help branch prediction +#ifndef MP_UNLIKELY +#define MP_UNLIKELY(x) __builtin_expect((x), 0) +#endif |