1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1987, 1991 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)endian.h 7.8 (Berkeley) 4/3/91 32 * $FreeBSD$ 33 */ 34 35#ifndef _MACHINE_ENDIAN_H_ 36#define _MACHINE_ENDIAN_H_ 37 38#include <sys/cdefs.h> 39#include <sys/_types.h> 40 41/* 42 * Define the order of 32-bit words in 64-bit words. 43 */ 44#define _QUAD_HIGHWORD 1 45#define _QUAD_LOWWORD 0 46 47/* 48 * Definitions for byte order, according to byte significance from low 49 * address to high. 50 */ 51#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 52#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 53#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 54 55#define _BYTE_ORDER _LITTLE_ENDIAN 56 57/* 58 * Deprecated variants that don't have enough underscores to be useful in more 59 * strict namespaces. 60 */ 61#if __BSD_VISIBLE 62#define LITTLE_ENDIAN _LITTLE_ENDIAN 63#define BIG_ENDIAN _BIG_ENDIAN 64#define PDP_ENDIAN _PDP_ENDIAN 65#define BYTE_ORDER _BYTE_ORDER 66#endif 67 68#define __bswap16(x) __builtin_bswap16(x) 69#define __bswap32(x) __builtin_bswap32(x) 70#define __bswap64(x) __builtin_bswap64(x) 71 72#define __htonl(x) __bswap32(x) 73#define __htons(x) __bswap16(x) 74#define __ntohl(x) __bswap32(x) 75#define __ntohs(x) __bswap16(x) 76 77#endif /* !_MACHINE_ENDIAN_H_ */ 78