2002-06-29 15:31:13 +02:00
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/* bithelp.h - Some bit manipulation helpers
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* Copyright (C) 1999 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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2007-10-23 12:48:09 +02:00
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* the Free Software Foundation; either version 3 of the License, or
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2002-06-29 15:31:13 +02:00
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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2007-10-23 12:48:09 +02:00
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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2002-06-29 15:31:13 +02:00
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*/
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#ifndef G10_BITHELP_H
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#define G10_BITHELP_H
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/****************
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* Rotate a 32 bit integer by n bytes
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*/
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#if defined(__GNUC__) && defined(__i386__)
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static inline u32
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rol( u32 x, int n)
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{
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__asm__("roll %%cl,%0"
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:"=r" (x)
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:"0" (x),"c" (n));
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return x;
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}
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#else
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* bithelp.h, des.c, random.c, rndlinux.c, sha1.c, blowfish.c, elgamal.c,
rijndael.c, rndunix.c, sha256.c, cast5.c, idea-stub.c, rmd160.c, rndw32.c,
sha512.c, md5.c, rmd160test.c, rsa.c, tiger.c: Edit all preprocessor
instructions to remove whitespace before the '#'. This is not required by
C89, but there are some compilers out there that don't like it.
2003-05-24 20:31:33 +02:00
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#define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) )
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2002-06-29 15:31:13 +02:00
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#endif
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#endif /*G10_BITHELP_H*/
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