diff options
| author | Werner Koch <[email protected]> | 1999-09-13 08:56:45 +0000 |
|---|---|---|
| committer | Werner Koch <[email protected]> | 1999-09-13 08:56:45 +0000 |
| commit | 52139a60cf68661e5023810dbc36a97101948258 (patch) | |
| tree | 20ded0626eb04b4cce01d207758eb7e073198d5c /cipher/bithelp.h | |
| parent | See ChangeLog: Tue Sep 7 18:44:05 CEST 1999 Werner Koch (diff) | |
| download | gnupg-52139a60cf68661e5023810dbc36a97101948258.tar.gz gnupg-52139a60cf68661e5023810dbc36a97101948258.zip | |
See ChangeLog: Mon Sep 13 10:55:14 CEST 1999 Werner Koch
Diffstat (limited to 'cipher/bithelp.h')
| -rw-r--r-- | cipher/bithelp.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/cipher/bithelp.h b/cipher/bithelp.h new file mode 100644 index 000000000..188db168a --- /dev/null +++ b/cipher/bithelp.h @@ -0,0 +1,41 @@ +/* bithelp.h - Some bit manipulation helpers + * Copyright (C) 1999 Free Software Foundation, Inc. + * + * This file is part of GnuPG. + * + * GnuPG is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * GnuPG is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ +#ifndef G10_BITHELP_H +#define G10_BITHELP_H + + +/**************** + * Rotate a 32 bit integer by n bytes + */ +#if defined(__GNUC__) && defined(__i386__) +static inline u32 +rol( u32 x, int n) +{ + __asm__("roll %%cl,%0" + :"=r" (x) + :"0" (x),"c" (n)); + return x; +} +#else + #define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) ) +#endif + + +#endif /*G10_BITHELP_H*/ |