endian.h revision 1.12
1/* $NetBSD: endian.h,v 1.12 1997/10/20 19:15:40 jonathan Exp $ */ 2 3/* 4 * Copyright (c) 1987, 1991, 1993 5 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)endian.h 8.1 (Berkeley) 6/11/93 36 */ 37 38#ifndef _MIPS_ENDIAN_H_ 39#define _MIPS_ENDIAN_H_ 40 41#ifndef _BYTE_ORDER 42# error Define MIPS target CPU endian-ness in port-specific header file. 43#endif 44 45/* 46 * Definitions for byte order, according to byte significance from low 47 * address to high. 48 */ 49#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 50#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 51#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 52 53 54/* 55 * Define _NOQUAD if the compiler does NOT support 64-bit integers. 56 */ 57/* #define _NOQUAD */ 58 59/* 60 * Define the order of 32-bit words in 64-bit words. 61 */ 62#if _BYTE_ORDER == _LITTLE_ENDIAN 63#define _QUAD_HIGHWORD 1 64#define _QUAD_LOWWORD 0 65#endif 66 67#if _BYTE_ORDER == _BIG_ENDIAN 68#define _QUAD_HIGHWORD 0 69#define _QUAD_LOWWORD 1 70#endif 71 72 73#ifndef _POSIX_SOURCE 74/* 75 * Traditional names for byteorder. 76 */ 77#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 78#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 79#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 80#define BYTE_ORDER _BYTE_ORDER 81 82#ifndef _LOCORE 83/* C-family endian-ness definitions */ 84 85#include <sys/cdefs.h> 86#include <mips/types.h> 87 88typedef u_int32_t in_addr_t; 89typedef u_int16_t in_port_t; 90 91__BEGIN_DECLS 92in_addr_t htonl __P((in_addr_t)); 93in_port_t htons __P((in_port_t)); 94in_addr_t ntohl __P((in_addr_t)); 95in_port_t ntohs __P((in_port_t)); 96u_int16_t bswap16 __P((u_int16_t)); 97u_int32_t bswap32 __P((u_int32_t)); 98u_int64_t bswap64 __P((u_int64_t)); 99__END_DECLS 100 101/* 102 * Macros for network/external number representation conversion. 103 */ 104#if BYTE_ORDER == BIG_ENDIAN && !defined(lint) 105#define ntohl(x) (x) 106#define ntohs(x) (x) 107#define htonl(x) (x) 108#define htons(x) (x) 109 110#define NTOHL(x) (x) 111#define NTOHS(x) (x) 112#define HTONL(x) (x) 113#define HTONS(x) (x) 114 115#else /* LITTLE_ENDIAN || !defined(lint) */ 116 117#define NTOHL(x) (x) = ntohl((in_addr_t)x) 118#define NTOHS(x) (x) = ntohs((in_port_t)x) 119#define HTONL(x) (x) = htonl((in_addr_t)x) 120#define HTONS(x) (x) = htons((in_port_t)x) 121#endif /* LITTLE_ENDIAN || !defined(lint) */ 122 123#else /* _LOCORE */ 124 125/* 126 * Endian-independent assembly-code aliases for unaligned memory accesses. 127 */ 128#if BYTE_ORDER == LITTLE_ENDIAN 129# define LWHI lwr 130# define LWLO lwl 131# define SWHI swr 132# define SWLO swl 133#endif /* BYTE_ORDER == LITTLE_ENDIAN */ 134 135#if BYTE_ORDER == BIG_ENDIAN 136# define LWHI lwl 137# define LWLO lwr 138# define SWHI swl 139# define SWLO swr 140#endif /* BYTE_ORDER == BIG_ENDIAN */ 141 142#endif /* _LOCORE */ 143#endif /* ! _POSIX_SOURCE */ 144#endif /* !_MIPS_ENDIAN_H_ */ 145