mirror of git://git.gnupg.org/gnupg.git
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/* 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*/
|