Subversion Repositories shark

Rev

Rev 1619 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 pj 1
/*
2
 * Copyright (c) 1987, 1991 Regents of the University of California.
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 * 1. Redistributions of source code must retain the above copyright
9
 *    notice, this list of conditions and the following disclaimer.
10
 * 2. Redistributions in binary form must reproduce the above copyright
11
 *    notice, this list of conditions and the following disclaimer in the
12
 *    documentation and/or other materials provided with the distribution.
13
 * 3. All advertising materials mentioning features or use of this software
14
 *    must display the following acknowledgement:
15
 *      This product includes software developed by the University of
16
 *      California, Berkeley and its contributors.
17
 * 4. Neither the name of the University nor the names of its contributors
18
 *    may be used to endorse or promote products derived from this software
19
 *    without specific prior written permission.
20
 *
21
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31
 * SUCH DAMAGE.
32
 *
33
 *      from: @(#)endian.h      7.8 (Berkeley) 4/3/91
34
 *      endian.h,v 1.5 1994/09/10 20:03:14 csgr Exp
35
 */
36
 
37
#ifndef _MACHINE_ENDIAN_H_
38
#define _MACHINE_ENDIAN_H_ 1
39
 
40
/*
41
 * Define the order of 32-bit words in 64-bit words.
42
 */
43
#define _QUAD_HIGHWORD 1
44
#define _QUAD_LOWWORD 0
45
 
46
/*
47
 * Definitions for byte order, according to byte significance from low
48
 * address to high.
49
 */
50
#define LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
51
#define BIG_ENDIAN      4321    /* MSB first: 68000, ibm, net */
52
#define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long */
53
 
54
#define BYTE_ORDER      LITTLE_ENDIAN
55
 
56
#ifndef KERNEL
1621 fabio 57
#include <arch/sys/cdefs.h>
2 pj 58
#endif
59
 
60
#define __word_swap_long(x) \
61
({ register u_long X = (x); \
62
   __asm ("rorl $16, %1" \
63
        : "=r" (X) \
64
        : "0" (X)); \
65
   X; })
66
#if __GNUC__ >= 2
67
#define __byte_swap_long(x) \
68
({ register u_long X = (x); \
69
   __asm ("xchgb %h1, %b1\n\trorl $16, %1\n\txchgb %h1, %b1" \
70
        : "=q" (X) \
71
        : "0" (X)); \
72
   X; })
73
#define __byte_swap_word(x) \
74
({ register u_short X = (x); \
75
   __asm ("xchgb %h1, %b1" \
76
        : "=q" (X) \
77
        : "0" (X)); \
78
   X; })
79
#else /* __GNUC__ >= 2 */
80
#define __byte_swap_long(x) \
81
({ register u_long X = (x); \
82
   __asm ("rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" \
83
        : "=r" (X) \
84
        : "0" (X)); \
85
   X; })
86
#define __byte_swap_word(x) \
87
({ register u_short X = (x); \
88
   __asm ("rorw $8, %w1" \
89
        : "=r" (X) \
90
        : "0" (X)); \
91
   X; })
92
#endif /* __GNUC__ >= 2 */
93
 
94
/*
95
 * Macros for network/external number representation conversion.
96
 */
97
#if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
98
#define ntohl(x)        (x)
99
#define ntohs(x)        (x)
100
#define htonl(x)        (x)
101
#define htons(x)        (x)
102
 
103
#define NTOHL(x)        (x)
104
#define NTOHS(x)        (x)
105
#define HTONL(x)        (x)
106
#define HTONS(x)        (x)
107
 
108
#else
109
 
110
#define ntohl   __byte_swap_long
111
#define ntohs   __byte_swap_word
112
#define htonl   __byte_swap_long
113
#define htons   __byte_swap_word
114
 
115
#define NTOHL(x)        (x) = ntohl((u_long)x)
116
#define NTOHS(x)        (x) = ntohs((u_short)x)
117
#define HTONL(x)        (x) = htonl((u_long)x)
118
#define HTONS(x)        (x) = htons((u_short)x)
119
#endif
120
#endif /* _MACHINE_ENDIAN_H_ */