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bithelp.h@ 2968

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Last change on this file since 2968 was 743, checked in by ansari, 26 years ago
Fichier oublie par Eric pour gnumd5.c - Reza 28/2/2000
File size: 1.2 KB

Rev	Line
[743]	1	/* bithelp.h - Some bit manipulation helpers
	2	* Copyright (C) 1999 Free Software Foundation, Inc.
	3	*
	4	* This file is part of GnuPG.
	5	*
	6	* GnuPG is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* GnuPG is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
	19	*/
	20	#ifndef G10_BITHELP_H
	21	#define G10_BITHELP_H
	22
	23
	24	/****************
	25	* Rotate a 32 bit integer by n bytes
	26	*/
	27	#if defined(__GNUC__) && defined(__i386__)
	28	static inline uint_4
	29	rol( uint_4 x, int n)
	30	{
	31	__asm__("roll %%cl,%0"
	32	:"=r" (x)
	33	:"0" (x),"c" (n));
	34	return x;
	35	}
	36	#else
	37	#define rol(x,n) ( ((x) << (n)) \| ((x) >> (32-(n))) )
	38	#endif
	39
	40
	41	#endif /G10_BITHELP_H/

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