/*      $NetBSD: byte_swap.h,v 1.8 2021/04/17 20:12:55 rillig Exp $     */

/*-
* Copyright (c) 1998, 2010 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.
*/

/*
* Copy of the i386 version. 64 bit versions may be added later.
*/

#ifndef _AMD64_BYTE_SWAP_H_
#define _AMD64_BYTE_SWAP_H_

#ifdef __x86_64__

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

#define __BYTE_SWAP_U64_VARIABLE __byte_swap_u64_variable
static __inline uint64_t __byte_swap_u64_variable(uint64_t);
static __inline uint64_t
__byte_swap_u64_variable(uint64_t x)
{
       __asm volatile ( "bswap %1" : "=r" (x) : "0" (x));
       return (x);
}

#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
#endif

#else   /*      __x86_64__      */

#include <i386/byte_swap.h>

#endif  /*      __x86_64__      */

#endif /* !_AMD64_BYTE_SWAP_H_ */