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| author | Werner Koch <wk@gnupg.org> | 2017-06-14 13:58:18 +0200 |
|---|---|---|
| committer | Werner Koch <wk@gnupg.org> | 2017-06-14 13:58:18 +0200 |
| commit | 6c882fb1fdb6c7cba2215fa7391110d63e24b9dc (patch) | |
| tree | 491cfab87813fee6fe3ac6e99df6b0d41985df56 /cipher/bithelp.h | |
| parent | 06f303a633ea2b992259688bef2b023c3f388f73 (diff) | |
| download | libgcrypt-6c882fb1fdb6c7cba2215fa7391110d63e24b9dc.tar.gz | |
cipher: New helper function rol64.
* cipher/bithelp.h (rol64): New inline functions.
Signed-off-by: Werner Koch <wk@gnupg.org>
Diffstat (limited to 'cipher/bithelp.h')
| -rw-r--r-- | cipher/bithelp.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/cipher/bithelp.h b/cipher/bithelp.h index 45753805..26ef7c35 100644 --- a/cipher/bithelp.h +++ b/cipher/bithelp.h @@ -35,6 +35,11 @@ static inline u32 ror(u32 x, int n) return ( (x >> (n&(32-1))) | (x << ((32-n)&(32-1))) ); } +static inline u64 rol64(u64 x, int n) +{ + return ( (x << (n&(64-1))) | (x >> ((64-n)&(64-1))) ); +} + /* Byte swap for 32-bit and 64-bit integers. If available, use compiler provided helpers. */ #ifdef HAVE_BUILTIN_BSWAP32 |