libc/arch-mips/include/endian.h

/*	$OpenBSD: endian.h,v 1.5 2006/02/27 23:35:59 miod Exp $ */

/*
 * Copyright (c) 2001-2002 Opsycon AB  (www.opsycon.se / www.opsycon.com)
 *
 * 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 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 _MIPS64_ENDIAN_H_
#define _MIPS64_ENDIAN_H_

#ifdef __GNUC__

#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
#define __swap16md(x) ({					\
    register uint16_t _x = (x);					\
    register uint16_t _r;					\
    __asm volatile ("wsbh %0, %1" : "=r" (_r) : "r" (_x));	\
    _r;								\
})

#define __swap32md(x) ({					\
    register uint32_t _x = (x);					\
    register uint32_t _r;					\
    __asm volatile ("wsbh %0, %1; rotr %0, %0, 16" : "=r" (_r) : "r" (_x)); \
    _r;								\
})

#define __swap64md(x) ({					\
    uint64_t _swap64md_x = (x);					\
    (uint64_t) __swap32md(_swap64md_x >> 32) |			\
        (uint64_t) __swap32md(_swap64md_x & 0xffffffff) << 32;	\
})

/* Tell sys/endian.h we have MD variants of the swap macros.  */
#define MD_SWAP

#endif  /* __mips32r2__ */
#endif  /* __GNUC__ */

#if defined(__MIPSEB__)
#define _BYTE_ORDER _BIG_ENDIAN
#else
#define _BYTE_ORDER _LITTLE_ENDIAN
#endif
#define __STRICT_ALIGNMENT
#include <sys/types.h>
#include <sys/endian.h>

#endif /* _MIPS64_ENDIAN_H_ */