diff options
| author | Clément Bœsch <u@pkh.me> | 2016-01-03 22:14:37 +0300 |
|---|---|---|
| committer | Clément Bœsch <u@pkh.me> | 2016-01-08 00:51:31 +0300 |
| commit | 2ce29d17656fab36286a76a9bb68e001e2815a3d (patch) | |
| tree | c57b323873ec1c45ec8ab07d1ea36bbe1c86a507 /libavutil/intmath.h | |
| parent | d64fe951c2ee8a85c615c33490889f45c4663862 (diff) | |
lavu: add ff_parity()
Diffstat (limited to 'libavutil/intmath.h')
| -rw-r--r-- | libavutil/intmath.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libavutil/intmath.h b/libavutil/intmath.h index 82193a6d7c..17c4f1b48a 100644 --- a/libavutil/intmath.h +++ b/libavutil/intmath.h @@ -153,6 +153,18 @@ static av_always_inline av_const unsigned ff_clz_c(unsigned x) } #endif +#ifndef ff_parity +#define ff_parity ff_parity_c +static av_always_inline av_const int ff_parity_c(uint32_t v) +{ +#if HAVE_PARITY + return __builtin_parity(v); +#else + return av_popcount(v) & 1; +#endif +} +#endif + /** * @} */ |