/*      $NetBSD: byte_swap.h,v 1.8 2009/04/30 07:01:27 skrll Exp $      */

/*      $OpenBSD: endian.h,v 1.8 2004/04/07 18:24:19 mickey Exp $       */

/*
* Copyright (c) 1998-2004 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _HPPA_BYTE_SWAP_H_
#define _HPPA_BYTE_SWAP_H_

#ifdef __GNUC__
#include <sys/types.h>
__BEGIN_DECLS


#define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable
static __inline uint32_t __byte_swap_u32_variable(uint32_t);
static __inline uint32_t
__byte_swap_u32_variable(uint32_t x)
{
       register uint32_t __swap32md_x; \
                                               \
       __asm  ("extru  %1, 7,8,%%r22\n\t"      \
               "shd    %1,%1,8,%0\n\t"         \
               "dep    %0,15,8,%0\n\t"         \
               "dep    %%r22,31,8,%0"          \
               : "=&r" (__swap32md_x)          \
               : "r" (x) : "r22");             \
       return(__swap32md_x);
}

#if 0
/*
* Use generic C version because w/ asm __inline below
* gcc inserts extra "extru r,31,16,r" to convert
* to 16 bit entity, which produces overhead we don't need.
* Besides, gcc does swap16 same way by itself.
*/
#define __swap16md(x)   __swap16gen(x)
#else
#define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable
static __inline uint16_t __byte_swap_u16_variable(uint16_t);
static __inline uint16_t
__byte_swap_u16_variable(uint16_t x)
{
       register uint16_t __swap16md_x;                         \
                                                                       \
       __asm  ("extru  %1,23,8,%0\n\t"                                 \
               "dep    %1,23,8,%0"                                     \
              : "=&r" (__swap16md_x) : "r" (x));                       \
       return(__swap16md_x);
}
#endif

__END_DECLS
#endif

#endif /* !_HPPA_BYTE_SWAP_H_ */