123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 2001 David E. O'Brien
|
|
*
|
|
* 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 8.1 (Berkeley) 6/10/93
|
|
* $NetBSD: endian.h,v 1.7 1999/08/21 05:53:51 simonb Exp $
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_ENDIAN_H_
|
|
#define _MACHINE_ENDIAN_H_
|
|
|
|
#include <sys/_types.h>
|
|
|
|
/*
|
|
* Definitions for byte order, according to byte significance from low
|
|
* address to high.
|
|
*/
|
|
#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
|
|
#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
|
|
#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
|
|
|
|
#define _BYTE_ORDER _LITTLE_ENDIAN
|
|
|
|
#if __BSD_VISIBLE
|
|
#define LITTLE_ENDIAN _LITTLE_ENDIAN
|
|
#define BIG_ENDIAN _BIG_ENDIAN
|
|
#define PDP_ENDIAN _PDP_ENDIAN
|
|
#define BYTE_ORDER _BYTE_ORDER
|
|
#endif
|
|
|
|
#define _QUAD_HIGHWORD 1
|
|
#define _QUAD_LOWWORD 0
|
|
#define __ntohl(x) (__bswap32(x))
|
|
#define __ntohs(x) (__bswap16(x))
|
|
#define __htonl(x) (__bswap32(x))
|
|
#define __htons(x) (__bswap16(x))
|
|
|
|
static __inline __uint64_t
|
|
__bswap64(__uint64_t x)
|
|
{
|
|
__uint64_t ret;
|
|
|
|
__asm __volatile("rev %0, %1\n"
|
|
: "=&r" (ret), "+r" (x));
|
|
|
|
return (ret);
|
|
}
|
|
|
|
static __inline __uint32_t
|
|
__bswap32_var(__uint32_t v)
|
|
{
|
|
__uint32_t ret;
|
|
|
|
__asm __volatile("rev32 %x0, %x1\n"
|
|
: "=&r" (ret), "+r" (v));
|
|
|
|
return (ret);
|
|
}
|
|
|
|
static __inline __uint16_t
|
|
__bswap16_var(__uint16_t v)
|
|
{
|
|
__uint32_t ret;
|
|
|
|
__asm __volatile("rev16 %w0, %w1\n"
|
|
: "=&r" (ret), "+r" (v));
|
|
|
|
return ((__uint16_t)ret);
|
|
}
|
|
|
|
#ifdef __OPTIMIZE__
|
|
|
|
#define __bswap32_constant(x) \
|
|
((((x) & 0xff000000U) >> 24) | \
|
|
(((x) & 0x00ff0000U) >> 8) | \
|
|
(((x) & 0x0000ff00U) << 8) | \
|
|
(((x) & 0x000000ffU) << 24))
|
|
|
|
#define __bswap16_constant(x) \
|
|
((((x) & 0xff00) >> 8) | \
|
|
(((x) & 0x00ff) << 8))
|
|
|
|
#define __bswap16(x) \
|
|
((__uint16_t)(__builtin_constant_p(x) ? \
|
|
__bswap16_constant((__uint16_t)(x)) : \
|
|
__bswap16_var(x)))
|
|
|
|
#define __bswap32(x) \
|
|
((__uint32_t)(__builtin_constant_p(x) ? \
|
|
__bswap32_constant((__uint32_t)(x)) : \
|
|
__bswap32_var(x)))
|
|
|
|
#else
|
|
#define __bswap16(x) __bswap16_var(x)
|
|
#define __bswap32(x) __bswap32_var(x)
|
|
|
|
#endif /* __OPTIMIZE__ */
|
|
#endif /* !_MACHINE_ENDIAN_H_ */
|