2 * Copyright (c) 1987, 1991 Regents of the University of California.
\r
3 * All rights reserved.
\r
5 * Redistribution and use in source and binary forms, with or without
\r
6 * modification, are permitted provided that the following conditions
\r
8 * 1. Redistributions of source code must retain the above copyright
\r
9 * notice, this list of conditions and the following disclaimer.
\r
10 * 2. Redistributions in binary form must reproduce the above copyright
\r
11 * notice, this list of conditions and the following disclaimer in the
\r
12 * documentation and/or other materials provided with the distribution.
\r
13 * 3. All advertising materials mentioning features or use of this software
\r
14 * must display the following acknowledgement:
\r
15 * This product includes software developed by the University of
\r
16 * California, Berkeley and its contributors.
\r
17 * 4. Neither the name of the University nor the names of its contributors
\r
18 * may be used to endorse or promote products derived from this software
\r
19 * without specific prior written permission.
\r
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
\r
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
\r
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
\r
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
\r
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
\r
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
\r
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
\r
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
\r
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
\r
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
\r
33 * from: @(#)endian.h 7.8 (Berkeley) 4/3/91
\r
34 * $FreeBSD: src/sys/i386/boot/dosboot/endian.h,v 1.5 1999/08/28 00:43:22 peter Exp $
\r
35 * $DragonFly: src/sys/platform/pc32/boot/dosboot/Attic/endian.h,v 1.3 2003/07/26 19:07:46 rob Exp $
\r
38 #ifndef _MACHINE_ENDIAN_H_
\r
39 #define _MACHINE_ENDIAN_H_ 1
\r
42 * Define the order of 32-bit words in 64-bit words.
\r
44 #define _QUAD_HIGHWORD 1
\r
45 #define _QUAD_LOWWORD 0
\r
48 * Definitions for byte order, according to byte significance from low
\r
51 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
\r
52 #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
\r
53 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
\r
55 #define BYTE_ORDER LITTLE_ENDIAN
\r
61 #define __word_swap_long(x) \
\r
62 ({ u_long X = (x); \
\r
63 __asm ("rorl $16, %1" \
\r
68 #define __byte_swap_long(x) \
\r
69 ({ u_long X = (x); \
\r
70 __asm ("xchgb %h1, %b1\n\trorl $16, %1\n\txchgb %h1, %b1" \
\r
74 #define __byte_swap_word(x) \
\r
75 ({ u_short X = (x); \
\r
76 __asm ("xchgb %h1, %b1" \
\r
80 #else /* __GNUC__ >= 2 */
\r
81 #define __byte_swap_long(x) \
\r
82 ({ u_long X = (x); \
\r
83 __asm ("rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" \
\r
87 #define __byte_swap_word(x) \
\r
88 ({ u_short X = (x); \
\r
89 __asm ("rorw $8, %w1" \
\r
93 #endif /* __GNUC__ >= 2 */
\r
96 * Macros for network/external number representation conversion.
\r
98 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
\r
99 #define ntohl(x) (x)
\r
100 #define ntohs(x) (x)
\r
101 #define htonl(x) (x)
\r
102 #define htons(x) (x)
\r
104 #define NTOHL(x) (x)
\r
105 #define NTOHS(x) (x)
\r
106 #define HTONL(x) (x)
\r
107 #define HTONS(x) (x)
\r
111 #define ntohl __byte_swap_long
\r
112 #define ntohs __byte_swap_word
\r
113 #define htonl __byte_swap_long
\r
114 #define htons __byte_swap_word
\r
116 #define NTOHL(x) (x) = ntohl((u_long)x)
\r
117 #define NTOHS(x) (x) = ntohs((u_short)x)
\r
118 #define HTONL(x) (x) = htonl((u_long)x)
\r
119 #define HTONS(x) (x) = htons((u_short)x)
\r
121 #endif /* _MACHINE_ENDIAN_H_ */
\r