1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1987, 1991 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)endian.h 7.8 (Berkeley) 4/3/91
* $FreeBSD$
*/
#ifndef _MACHINE_ENDIAN_H_
#define _MACHINE_ENDIAN_H_
#include <sys/cdefs.h>
#ifndef __ASSEMBLER__
#include <sys/_types.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* Definitions for byte order, according to byte significance from low
* address to high.
*/
#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
#ifdef __MIPSEB__
#define _BYTE_ORDER _BIG_ENDIAN
#else
#define _BYTE_ORDER _LITTLE_ENDIAN
#endif /* __MIBSEB__ */
/*
* Deprecated variants that don't have enough underscores to be useful in more
* strict namespaces.
*/
#if __BSD_VISIBLE
#define LITTLE_ENDIAN _LITTLE_ENDIAN
#define BIG_ENDIAN _BIG_ENDIAN
#define PDP_ENDIAN _PDP_ENDIAN
#define BYTE_ORDER _BYTE_ORDER
#endif
#ifndef __ASSEMBLER__
#if defined(__GNUCLIKE_BUILTIN_CONSTANT_P) && defined(__OPTIMIZE__)
#define __is_constant(x) __builtin_constant_p(x)
#else
#define __is_constant(x) 0
#endif
#define __bswap16_const(x) (((x) >> 8) | (((x) << 8) & 0xff00))
#define __bswap32_const(x) (((x) >> 24) | (((x) >> 8) & 0xff00) | \
(((x) << 8) & 0xff0000) | (((x) << 24) & 0xff000000))
#define __bswap64_const(x) (((x) >> 56) | (((x) >> 40) & 0xff00) | \
(((x) >> 24) & 0xff0000) | (((x) >> 8) & 0xff000000) | \
(((x) << 8) & ((__uint64_t)0xff << 32)) | \
(((x) << 24) & ((__uint64_t)0xff << 40)) | \
(((x) << 40) & ((__uint64_t)0xff << 48)) | (((x) << 56)))
static __inline __uint16_t
__bswap16_var(__uint16_t _x)
{
return ((_x >> 8) | ((_x << 8) & 0xff00));
}
static __inline __uint32_t
__bswap32_var(__uint32_t _x)
{
return ((_x >> 24) | ((_x >> 8) & 0xff00) | ((_x << 8) & 0xff0000) |
((_x << 24) & 0xff000000));
}
static __inline __uint64_t
__bswap64_var(__uint64_t _x)
{
return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) |
((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) |
((_x << 24) & ((__uint64_t)0xff << 40)) |
((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56)));
}
#define __bswap16(x) ((__uint16_t)(__is_constant((x)) ? \
__bswap16_const((__uint16_t)(x)) : __bswap16_var((__uint16_t)(x))))
#define __bswap32(x) ((__uint32_t)(__is_constant((x)) ? \
__bswap32_const((__uint32_t)(x)) : __bswap32_var((__uint32_t)(x))))
#define __bswap64(x) ((__uint64_t)(__is_constant((x)) ? \
__bswap64_const((__uint64_t)(x)) : __bswap64_var((__uint64_t)(x))))
#ifdef __MIPSEB__
#define __htonl(x) ((__uint32_t)(x))
#define __htons(x) ((__uint16_t)(x))
#define __ntohl(x) ((__uint32_t)(x))
#define __ntohs(x) ((__uint16_t)(x))
/*
* Define the order of 32-bit words in 64-bit words.
*/
/*
* XXXMIPS: Additional parentheses to make gcc more happy.
*/
#define _QUAD_HIGHWORD 0
#define _QUAD_LOWWORD 1
#else
#define _QUAD_HIGHWORD 1
#define _QUAD_LOWWORD 0
#define __ntohl(x) (__bswap32((x)))
#define __ntohs(x) (__bswap16((x)))
#define __htonl(x) (__bswap32((x)))
#define __htons(x) (__bswap16((x)))
#endif /* _MIPSEB */
#endif /* _ASSEMBLER_ */
#ifdef __cplusplus
}
#endif
#endif /* !_MACHINE_ENDIAN_H_ */
|
