LCOM1920-T02G10

/*        $NetBSD: byte_swap.h,v 1.15 2008/04/28 20:23:24 martin Exp $        */

/*-

 * Copyright (c) 1998 The NetBSD Foundation, Inc.

 * All rights reserved.

 *

 * This code is derived from software contributed to The NetBSD Foundation

 * by Charles M. Hannum.

 *

 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.

 */

#ifndef _I386_BYTE_SWAP_H_

#define        _I386_BYTE_SWAP_H_

#include <sys/types.h>

#ifdef  __GNUC__

__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)

{

        __asm volatile (

            "bswap %1"

            : "=r" (x) : "0" (x));

        return (x);

}

#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)

{

        __asm volatile ("rorw $8, %w1" : "=r" (x) : "0" (x)); 

        return (x);

}

__END_DECLS

#elif defined(_KERNEL) || defined(_LKM)

#define        __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable

#define        __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable

uint32_t        __byte_swap_u32_variable(uint32_t);

uint16_t        __byte_swap_u16_variable(uint16_t);

#endif

#endif /* !_I386_BYTE_SWAP_H_ */