1/*- 2 * Copyright (c) 1987, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)endian.h 8.1 (Berkeley) 6/10/93 30 * $NetBSD: endian.h,v 1.5 1997/10/09 15:42:19 bouyer Exp $ 31 * $FreeBSD$ 32 */ 33 34#ifndef _MACHINE_ENDIAN_H_ 35#define _MACHINE_ENDIAN_H_ 36 37#include <sys/cdefs.h> 38#include <sys/_types.h> 39 40/* 41 * Define the order of 32-bit words in 64-bit words. 42 */ 43#define _QUAD_HIGHWORD 1 44#define _QUAD_LOWWORD 0 45 46/* 47 * Definitions for byte order, according to byte significance from low 48 * address to high. 49 */ 50#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 51#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 52#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 53 54#define _BYTE_ORDER _LITTLE_ENDIAN 55 56/* 57 * Deprecated variants that don't have enough underscores to be useful in more 58 * strict namespaces. 59 */ 60#if __BSD_VISIBLE 61#define LITTLE_ENDIAN _LITTLE_ENDIAN 62#define BIG_ENDIAN _BIG_ENDIAN 63#define PDP_ENDIAN _PDP_ENDIAN 64#define BYTE_ORDER _BYTE_ORDER 65#endif 66 67#if defined(__CC_SUPPORTS___INLINE) && defined(__GNUCLIKE_ASM) 68 69static __inline __uint64_t 70__bswap64(__uint64_t _x) 71{ 72 __uint64_t __r; 73 74 __asm __volatile("mux1 %0=%1,@rev" 75 : "=r" (__r) : "r"(_x)); 76 return __r; 77} 78 79static __inline __uint32_t 80__bswap32(__uint32_t _x) 81{ 82 83 return (__bswap64(_x) >> 32); 84} 85 86static __inline __uint16_t 87__bswap16(__uint16_t _x) 88{ 89 90 return (__bswap64(_x) >> 48); 91} 92 93#define __htonl(x) __bswap32(x) 94#define __htons(x) __bswap16(x) 95#define __ntohl(x) __bswap32(x) 96#define __ntohs(x) __bswap16(x) 97 98#else /* !(__CC_SUPPORTS___INLINE && __GNUCLIKE_ASM) */ 99 100/* 101 * No optimizations are available for this compiler. Fall back to 102 * non-optimized functions by defining the constant usually used to prevent 103 * redefinition. 104 */ 105#define _BYTEORDER_FUNC_DEFINED 106 107#endif /* __CC_SUPPORTS___INLINE && __GNUCLIKE_ASM */ 108 109#endif /* !_MACHINE_ENDIAN_H_ */ 110