diff options
| author | Daniel Verkamp <daniel@drv.nu> | 2012-01-03 01:23:48 +0000 |
|---|---|---|
| committer | Janne Grunau <janne-libav@jannau.net> | 2012-01-03 14:25:43 +0100 |
| commit | b73ec0547317fec56a72cda068180f71e12e8f20 (patch) | |
| tree | 71213e636db5b9bf14b7b70250f45c33439ed312 /libavutil | |
| parent | 418f066f8ce35f4a9cc2bea2cbb125a26ca0a003 (diff) | |
| download | ffmpeg-b73ec0547317fec56a72cda068180f71e12e8f20.tar.gz | |
Add av_popcount64
Signed-off-by: Janne Grunau <janne-libav@jannau.net>
Diffstat (limited to 'libavutil')
| -rw-r--r-- | libavutil/common.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libavutil/common.h b/libavutil/common.h index 7e93a1ab47..c99d858472 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -218,6 +218,16 @@ static av_always_inline av_const int av_popcount_c(uint32_t x) return (x + (x >> 16)) & 0x3F; } +/** + * Count number of bits set to one in x + * @param x value to count bits of + * @return the number of bits set to one in x + */ +static av_always_inline av_const int av_popcount64_c(uint64_t x) +{ + return av_popcount(x) + av_popcount(x >> 32); +} + #define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24)) #define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24)) @@ -383,3 +393,6 @@ static av_always_inline av_const int av_popcount_c(uint32_t x) #ifndef av_popcount # define av_popcount av_popcount_c #endif +#ifndef av_popcount64 +# define av_popcount64 av_popcount64_c +#endif |