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#ifndef BSWAP_H_INCLUDED
#define BSWAP_H_INCLUDED
/*
* Copyright (C) 2000, 2001 Billy Biggs <vektor@dumbterm.net>,
* Håkan Hjort <d95hjort@dtek.chalmers.se>
*
* Modified for use with MPlayer, changes contained in libdvdread_changes.diff.
* detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
* $Id$
*
* This program 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.
*
* This program 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
*/
#if defined(WORDS_BIGENDIAN)
/* All bigendian systems are fine, just ignore the swaps. */
#define B2N_16(x) (void)(x)
#define B2N_32(x) (void)(x)
#define B2N_64(x) (void)(x)
#else
/* For __FreeBSD_version */
#if defined(HAVE_SYS_PARAM_H)
#include <sys/param.h>
#endif
#if defined(__linux__)
#include <byteswap.h>
#define B2N_16(x) x = bswap_16(x)
#define B2N_32(x) x = bswap_32(x)
#define B2N_64(x) x = bswap_64(x)
#elif defined(__NetBSD__)
#include <sys/endian.h>
#define B2N_16(x) BE16TOH(x)
#define B2N_32(x) BE32TOH(x)
#define B2N_64(x) BE64TOH(x)
#elif defined(__OpenBSD__)
#include <sys/endian.h>
#define B2N_16(x) x = swap16(x)
#define B2N_32(x) x = swap32(x)
#define B2N_64(x) x = swap64(x)
#elif defined(__FreeBSD__) && __FreeBSD_version >= 470000
#include <sys/endian.h>
#define B2N_16(x) x = be16toh(x)
#define B2N_32(x) x = be32toh(x)
#define B2N_64(x) x = be64toh(x)
#elif defined(__DragonFly__)
#include <sys/endian.h>
#define B2N_16(x) x = be16toh(x)
#define B2N_32(x) x = be32toh(x)
#define B2N_64(x) x = be64toh(x)
#elif defined(ARCH_X86)
inline static unsigned short bswap_16(unsigned short x)
{
__asm("xchgb %b0,%h0" :
"=q" (x) :
"0" (x));
return x;
}
#define B2N_16(x) x = bswap_16(x)
inline static unsigned int bswap_32(unsigned int x)
{
__asm(
#if __CPU__ > 386
"bswap %0":
"=r" (x) :
#else
"xchgb %b0,%h0\n"
" rorl $16,%0\n"
" xchgb %b0,%h0":
"=q" (x) :
#endif
"0" (x));
return x;
}
#define B2N_32(x) x = bswap_32(x)
inline static unsigned long long int bswap_64(unsigned long long int x)
{
register union { __extension__ uint64_t __ll;
uint32_t __l[2]; } __x;
asm("xchgl %0,%1":
"=r"(__x.__l[0]),"=r"(__x.__l[1]):
"0"(bswap_32((unsigned long)x)),"1"(bswap_32((unsigned long)(x>>32))));
return __x.__ll;
}
#define B2N_64(x) x = bswap_64(x)
/* This is a slow but portable implementation, it has multiple evaluation
* problems so beware.
* Old FreeBSD's and Solaris don't have <byteswap.h> or any other such
* functionality!
*/
#elif defined(__FreeBSD__) || defined(__sun) || defined(__bsdi__) || defined(__CYGWIN__)
#define B2N_16(x) \
x = ((((x) & 0xff00) >> 8) | \
(((x) & 0x00ff) << 8))
#define B2N_32(x) \
x = ((((x) & 0xff000000) >> 24) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x000000ff) << 24))
#define B2N_64(x) \
x = ((((x) & 0xff00000000000000) >> 56) | \
(((x) & 0x00ff000000000000) >> 40) | \
(((x) & 0x0000ff0000000000) >> 24) | \
(((x) & 0x000000ff00000000) >> 8) | \
(((x) & 0x00000000ff000000) << 8) | \
(((x) & 0x0000000000ff0000) << 24) | \
(((x) & 0x000000000000ff00) << 40) | \
(((x) & 0x00000000000000ff) << 56))
#else
/* If there isn't a header provided with your system with this functionality
* add the relevant || define( ) to the portable implementation above.
*/
#error "You need to add endian swap macros for you're system"
#endif
#endif /* WORDS_BIGENDIAN */
#endif /* BSWAP_H_INCLUDED */
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