1 /* $NetBSD: endian.h,v 1.13 1997/10/30 09:07:50 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 88 typedef u_int32_t in_addr_t; 89 typedef u_int16_t in_port_t; 90 91 __BEGIN_DECLS 92 in_addr_t htonl __P((in_addr_t)); 93 in_port_t htons __P((in_port_t)); 94 in_addr_t ntohl __P((in_addr_t)); 95 in_port_t ntohs __P((in_port_t)); 96 u_int16_t bswap16 __P((u_int16_t)); 97 u_int32_t bswap32 __P((u_int32_t)); 98 u_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) (void) (x) 111 #define NTOHS(x) (void) (x) 112 #define HTONL(x) (void) (x) 113 #define HTONS(x) (void) (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