/*      $NetBSD: byte_swap.h,v 1.12 2017/01/14 16:21:28 christos Exp $  */

/*
* Copyright (c) 1987, 1991 Regents of the University of California.
* 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.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 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.
*
*      @(#)endian.h    7.8 (Berkeley) 4/3/91
*/

#ifndef _VAX_BYTE_SWAP_H_
#define _VAX_BYTE_SWAP_H_

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

#define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable
static __inline uint32_t __attribute__((__unused__))
__byte_swap_u32_variable(uint32_t x)
{
       uint32_t y;

       __asm volatile(
               "rotl   $-8, %1, %0     \n"
               "insv   %0, $16, $8, %0 \n"
               "rotl   $8, %1, %%r1    \n"
               "movb   %%r1, %0"
               : "=&r" (y)
               : "r" (x)
               : "r1", "cc");

       return (y);
}

#define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable
static __inline uint16_t __attribute__((__unused__))
__byte_swap_u16_variable(uint16_t x)
{

       return (uint16_t)(x << 8 | x >> 8);
}

__END_DECLS
#endif
#endif /* _VAX_BYTE_SWAP_H_ */