summaryrefslogtreecommitdiff
path: root/bswap.h
blob: aace9b76e963cddf9c4224e82d7e4caa31b48c45 (plain)
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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
#ifndef BSWAP_H
#define BSWAP_H

#include "config-host.h"

#include <inttypes.h>

#ifdef CONFIG_MACHINE_BSWAP_H
#include <sys/endian.h>
#include <sys/types.h>
#include <machine/bswap.h>
#else

#ifdef CONFIG_BYTESWAP_H
#include <byteswap.h>
#else

#define bswap_16(x) \
({ \
	uint16_t __x = (x); \
	((uint16_t)( \
		(((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
		(((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
})

#define bswap_32(x) \
({ \
	uint32_t __x = (x); \
	((uint32_t)( \
		(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
		(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) <<  8) | \
		(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >>  8) | \
		(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
})

#define bswap_64(x) \
({ \
	uint64_t __x = (x); \
	((uint64_t)( \
		(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
		(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
		(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
		(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) <<  8) | \
	        (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >>  8) | \
		(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
		(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
		(uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
})

#endif /* !CONFIG_BYTESWAP_H */

static inline uint16_t bswap16(uint16_t x)
{
    return bswap_16(x);
}

static inline uint32_t bswap32(uint32_t x)
{
    return bswap_32(x);
}

static inline uint64_t bswap64(uint64_t x)
{
    return bswap_64(x);
}

#endif /* ! CONFIG_MACHINE_BSWAP_H */

static inline void bswap16s(uint16_t *s)
{
    *s = bswap16(*s);
}

static inline void bswap32s(uint32_t *s)
{
    *s = bswap32(*s);
}

static inline void bswap64s(uint64_t *s)
{
    *s = bswap64(*s);
}

#if defined(HOST_WORDS_BIGENDIAN)
#define be_bswap(v, size) (v)
#define le_bswap(v, size) bswap ## size(v)
#define be_bswaps(v, size)
#define le_bswaps(p, size) *p = bswap ## size(*p);
#else
#define le_bswap(v, size) (v)
#define be_bswap(v, size) bswap ## size(v)
#define le_bswaps(v, size)
#define be_bswaps(p, size) *p = bswap ## size(*p);
#endif

#define CPU_CONVERT(endian, size, type)\
static inline type endian ## size ## _to_cpu(type v)\
{\
    return endian ## _bswap(v, size);\
}\
\
static inline type cpu_to_ ## endian ## size(type v)\
{\
    return endian ## _bswap(v, size);\
}\
\
static inline void endian ## size ## _to_cpus(type *p)\
{\
    endian ## _bswaps(p, size)\
}\
\
static inline void cpu_to_ ## endian ## size ## s(type *p)\
{\
    endian ## _bswaps(p, size)\
}\
\
static inline type endian ## size ## _to_cpup(const type *p)\
{\
    return endian ## size ## _to_cpu(*p);\
}\
\
static inline void cpu_to_ ## endian ## size ## w(type *p, type v)\
{\
     *p = cpu_to_ ## endian ## size(v);\
}

CPU_CONVERT(be, 16, uint16_t)
CPU_CONVERT(be, 32, uint32_t)
CPU_CONVERT(be, 64, uint64_t)

CPU_CONVERT(le, 16, uint16_t)
CPU_CONVERT(le, 32, uint32_t)
CPU_CONVERT(le, 64, uint64_t)

/* unaligned versions (optimized for frequent unaligned accesses)*/

#if defined(__i386__) || defined(_ARCH_PPC)

#define cpu_to_le16wu(p, v) cpu_to_le16w(p, v)
#define cpu_to_le32wu(p, v) cpu_to_le32w(p, v)
#define le16_to_cpupu(p) le16_to_cpup(p)
#define le32_to_cpupu(p) le32_to_cpup(p)
#define be32_to_cpupu(p) be32_to_cpup(p)

#define cpu_to_be16wu(p, v) cpu_to_be16w(p, v)
#define cpu_to_be32wu(p, v) cpu_to_be32w(p, v)

#else

static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
{
    uint8_t *p1 = (uint8_t *)p;

    p1[0] = v & 0xff;
    p1[1] = v >> 8;
}

static inline void cpu_to_le32wu(uint32_t *p, uint32_t v)
{
    uint8_t *p1 = (uint8_t *)p;

    p1[0] = v & 0xff;
    p1[1] = v >> 8;
    p1[2] = v >> 16;
    p1[3] = v >> 24;
}

static inline uint16_t le16_to_cpupu(const uint16_t *p)
{
    const uint8_t *p1 = (const uint8_t *)p;
    return p1[0] | (p1[1] << 8);
}

static inline uint32_t le32_to_cpupu(const uint32_t *p)
{
    const uint8_t *p1 = (const uint8_t *)p;
    return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24);
}

static inline uint32_t be32_to_cpupu(const uint32_t *p)
{
    const uint8_t *p1 = (const uint8_t *)p;
    return p1[3] | (p1[2] << 8) | (p1[1] << 16) | (p1[0] << 24);
}

static inline void cpu_to_be16wu(uint16_t *p, uint16_t v)
{
    uint8_t *p1 = (uint8_t *)p;

    p1[0] = v >> 8;
    p1[1] = v & 0xff;
}

static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
{
    uint8_t *p1 = (uint8_t *)p;

    p1[0] = v >> 24;
    p1[1] = v >> 16;
    p1[2] = v >> 8;
    p1[3] = v & 0xff;
}

#endif

#ifdef HOST_WORDS_BIGENDIAN
#define cpu_to_32wu cpu_to_be32wu
#else
#define cpu_to_32wu cpu_to_le32wu
#endif

#undef le_bswap
#undef be_bswap
#undef le_bswaps
#undef be_bswaps

/* len must be one of 1, 2, 4 */
static inline uint32_t qemu_bswap_len(uint32_t value, int len)
{
    return bswap32(value) >> (32 - 8 * len);
}

#endif /* BSWAP_H */