endian.h revision 1.23
1 /* $NetBSD: endian.h,v 1.23 1998/08/15 05:10:24 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1987, 1991 Regents of the University of California. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)endian.h 7.8 (Berkeley) 4/3/91 72 */ 73 74 #ifndef _I386_ENDIAN_H_ 75 #define _I386_ENDIAN_H_ 76 77 /* 78 * Define the order of 32-bit words in 64-bit words. 79 */ 80 #define _QUAD_HIGHWORD 1 81 #define _QUAD_LOWWORD 0 82 83 84 #ifndef _POSIX_SOURCE 85 /* 86 * Definitions for byte order, according to byte significance from low 87 * address to high. 88 */ 89 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 90 #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 91 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 92 93 #define BYTE_ORDER LITTLE_ENDIAN 94 95 #include <sys/cdefs.h> 96 97 typedef u_int32_t in_addr_t; 98 typedef u_int16_t in_port_t; 99 100 __BEGIN_DECLS 101 in_addr_t htonl __P((in_addr_t)); 102 in_port_t htons __P((in_port_t)); 103 in_addr_t ntohl __P((in_addr_t)); 104 in_port_t ntohs __P((in_port_t)); 105 u_int16_t bswap16 __P((u_int16_t)); 106 u_int32_t bswap32 __P((u_int32_t)); 107 u_int64_t bswap64 __P((u_int64_t)); 108 __END_DECLS 109 110 111 #ifdef __GNUC__ 112 113 #if defined(_KERNEL) && !defined(_LKM) 114 #include "opt_cputype.h" 115 #endif 116 117 #if defined(_KERNEL) && !defined(_LKM) && !defined(I386_CPU) 118 #define __byte_swap_long_variable(x) \ 119 ({ register in_addr_t __x = (x); \ 120 __asm ("bswap %1" \ 121 : "=r" (__x) \ 122 : "0" (__x)); \ 123 __x; }) 124 #else 125 #define __byte_swap_long_variable(x) \ 126 ({ register in_addr_t __x = (x); \ 127 __asm ("rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" \ 128 : "=r" (__x) \ 129 : "0" (__x)); \ 130 __x; }) 131 #endif /* _KERNEL && ... */ 132 133 #define __byte_swap_word_variable(x) \ 134 ({ register in_port_t __x = (x); \ 135 __asm ("rorw $8, %w1" \ 136 : "=r" (__x) \ 137 : "0" (__x)); \ 138 __x; }) 139 140 #ifdef __OPTIMIZE__ 141 142 #define __byte_swap_long_constant(x) \ 143 ((((x) & 0xff000000) >> 24) | \ 144 (((x) & 0x00ff0000) >> 8) | \ 145 (((x) & 0x0000ff00) << 8) | \ 146 (((x) & 0x000000ff) << 24)) 147 #define __byte_swap_word_constant(x) \ 148 ((((x) & 0xff00) >> 8) | \ 149 (((x) & 0x00ff) << 8)) 150 #define __byte_swap_long(x) \ 151 (__builtin_constant_p((x)) ? \ 152 __byte_swap_long_constant(x) : __byte_swap_long_variable(x)) 153 #define __byte_swap_word(x) \ 154 (__builtin_constant_p((x)) ? \ 155 __byte_swap_word_constant(x) : __byte_swap_word_variable(x)) 156 157 #else /* __OPTIMIZE__ */ 158 159 #define __byte_swap_long(x) __byte_swap_long_variable(x) 160 #define __byte_swap_word(x) __byte_swap_word_variable(x) 161 162 #endif /* __OPTIMIZE__ */ 163 164 #define ntohl(x) ((in_addr_t)__byte_swap_long((in_addr_t)(x))) 165 #define ntohs(x) ((in_port_t)__byte_swap_word((in_port_t)(x))) 166 #define htonl(x) ((in_addr_t)__byte_swap_long((in_addr_t)(x))) 167 #define htons(x) ((in_port_t)__byte_swap_word((in_port_t)(x))) 168 169 #endif /* __GNUC__ */ 170 171 172 /* 173 * Macros for network/external number representation conversion. 174 */ 175 #define NTOHL(x) (x) = ntohl((in_addr_t)(x)) 176 #define NTOHS(x) (x) = ntohs((in_port_t)(x)) 177 #define HTONL(x) (x) = htonl((in_addr_t)(x)) 178 #define HTONS(x) (x) = htons((in_port_t)(x)) 179 180 #endif /* _POSIX_SOURCE */ 181 182 #endif /* !_I386_ENDIAN_H_ */ 183
Indexes created Wed Sep 24 15:09:51 GMT 2025