diff options
| author | Matt Mackall <mpm@selenic.com> | 2005-03-07 18:12:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-03-07 18:12:18 -0800 |
| commit | 18684e6e939e136dbbcf0eabcc75d0e9f5e306fa (patch) | |
| tree | 6cd9966aa26a4c1221f5c2532b74e407d2e76b15 /include | |
| parent | c41f39c1442b3683e522cf65f5d28f037a0c019e (diff) | |
[PATCH] random: Create new rol32/ror32 bitops
Add rol32 and ror32 bitops to bitops.h
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bitops.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 48f87b979ca9..7d1f8b67c6bf 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -134,4 +134,26 @@ static inline unsigned long hweight_long(unsigned long w) return sizeof(w) == 4 ? generic_hweight32(w) : generic_hweight64(w); } +/* + * rol32 - rotate a 32-bit value left + * + * @word: value to rotate + * @shift: bits to roll + */ +static inline __u32 rol32(__u32 word, int shift) +{ + return (word << shift) | (word >> (32 - shift)); +} + +/* + * ror32 - rotate a 32-bit value right + * + * @word: value to rotate + * @shift: bits to roll + */ +static inline __u32 ror32(__u32 word, int shift) +{ + return (word >> shift) | (word << (32 - shift)); +} + #endif |