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source: vbox/trunk/src/recompiler/bswap.h@ 75569

最後變更 在這個檔案從75569是 69465,由 vboxsync 提交於 7 年 前

recompiler: scm updates

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1#ifndef BSWAP_H
2#define BSWAP_H
3
4#include "config-host.h"
5
6#include <inttypes.h>
7
8#ifdef CONFIG_MACHINE_BSWAP_H
9#include <sys/endian.h>
10#include <sys/types.h>
11#include <machine/bswap.h>
12#else
13
14#ifdef CONFIG_BYTESWAP_H
15#include <byteswap.h>
16#else
17
18#define bswap_16(x) __extension__ /* <- VBOX */ \
19({ \
20 uint16_t __x = (x); \
21 ((uint16_t)( \
22 (((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
23 (((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
24})
25
26#define bswap_32(x) __extension__ /* <- VBOX */ \
27({ \
28 uint32_t __x = (x); \
29 ((uint32_t)( \
30 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
31 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
32 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
33 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
34})
35
36#define bswap_64(x) __extension__ /* <- VBOX */ \
37({ \
38 uint64_t __x = (x); \
39 ((uint64_t)( \
40 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
41 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
42 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
43 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
44 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
45 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
46 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
47 (uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
48})
49
50#endif /* !CONFIG_BYTESWAP_H */
51
52static inline uint16_t bswap16(uint16_t x)
53{
54 return bswap_16(x);
55}
56
57static inline uint32_t bswap32(uint32_t x)
58{
59 return bswap_32(x);
60}
61
62static inline uint64_t bswap64(uint64_t x)
63{
64 return bswap_64(x);
65}
66
67#endif /* ! CONFIG_MACHINE_BSWAP_H */
68
69static inline void bswap16s(uint16_t *s)
70{
71 *s = bswap16(*s);
72}
73
74static inline void bswap32s(uint32_t *s)
75{
76 *s = bswap32(*s);
77}
78
79static inline void bswap64s(uint64_t *s)
80{
81 *s = bswap64(*s);
82}
83
84#if defined(HOST_WORDS_BIGENDIAN)
85#define be_bswap(v, size) (v)
86#define le_bswap(v, size) bswap ## size(v)
87#define be_bswaps(v, size)
88#define le_bswaps(p, size) *p = bswap ## size(*p);
89#else
90#define le_bswap(v, size) (v)
91#define be_bswap(v, size) bswap ## size(v)
92#define le_bswaps(v, size)
93#define be_bswaps(p, size) *p = bswap ## size(*p);
94#endif
95
96#define CPU_CONVERT(endian, size, type)\
97static inline type endian ## size ## _to_cpu(type v)\
98{\
99 return endian ## _bswap(v, size);\
100}\
101\
102static inline type cpu_to_ ## endian ## size(type v)\
103{\
104 return endian ## _bswap(v, size);\
105}\
106\
107static inline void endian ## size ## _to_cpus(type *p)\
108{\
109 endian ## _bswaps(p, size)\
110}\
111\
112static inline void cpu_to_ ## endian ## size ## s(type *p)\
113{\
114 endian ## _bswaps(p, size)\
115}\
116\
117static inline type endian ## size ## _to_cpup(const type *p)\
118{\
119 return endian ## size ## _to_cpu(*p);\
120}\
121\
122static inline void cpu_to_ ## endian ## size ## w(type *p, type v)\
123{\
124 *p = cpu_to_ ## endian ## size(v);\
125}
126
127CPU_CONVERT(be, 16, uint16_t)
128CPU_CONVERT(be, 32, uint32_t)
129CPU_CONVERT(be, 64, uint64_t)
130
131CPU_CONVERT(le, 16, uint16_t)
132CPU_CONVERT(le, 32, uint32_t)
133CPU_CONVERT(le, 64, uint64_t)
134
135/* unaligned versions (optimized for frequent unaligned accesses)*/
136
137#if defined(__i386__) || defined(_ARCH_PPC)
138
139#define cpu_to_le16wu(p, v) cpu_to_le16w(p, v)
140#define cpu_to_le32wu(p, v) cpu_to_le32w(p, v)
141#define le16_to_cpupu(p) le16_to_cpup(p)
142#define le32_to_cpupu(p) le32_to_cpup(p)
143#define be32_to_cpupu(p) be32_to_cpup(p)
144
145#define cpu_to_be16wu(p, v) cpu_to_be16w(p, v)
146#define cpu_to_be32wu(p, v) cpu_to_be32w(p, v)
147
148#else
149
150static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
151{
152 uint8_t *p1 = (uint8_t *)p;
153
154 p1[0] = v & 0xff;
155 p1[1] = v >> 8;
156}
157
158static inline void cpu_to_le32wu(uint32_t *p, uint32_t v)
159{
160 uint8_t *p1 = (uint8_t *)p;
161
162 p1[0] = v & 0xff;
163 p1[1] = v >> 8;
164 p1[2] = v >> 16;
165 p1[3] = v >> 24;
166}
167
168static inline uint16_t le16_to_cpupu(const uint16_t *p)
169{
170 const uint8_t *p1 = (const uint8_t *)p;
171 return p1[0] | (p1[1] << 8);
172}
173
174static inline uint32_t le32_to_cpupu(const uint32_t *p)
175{
176 const uint8_t *p1 = (const uint8_t *)p;
177 return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24);
178}
179
180static inline uint32_t be32_to_cpupu(const uint32_t *p)
181{
182 const uint8_t *p1 = (const uint8_t *)p;
183 return p1[3] | (p1[2] << 8) | (p1[1] << 16) | (p1[0] << 24);
184}
185
186static inline void cpu_to_be16wu(uint16_t *p, uint16_t v)
187{
188 uint8_t *p1 = (uint8_t *)p;
189
190 p1[0] = v >> 8;
191 p1[1] = v & 0xff;
192}
193
194static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
195{
196 uint8_t *p1 = (uint8_t *)p;
197
198 p1[0] = v >> 24;
199 p1[1] = v >> 16;
200 p1[2] = v >> 8;
201 p1[3] = v & 0xff;
202}
203
204#endif
205
206#ifdef HOST_WORDS_BIGENDIAN
207#define cpu_to_32wu cpu_to_be32wu
208#define leul_to_cpu(v) glue(glue(le,HOST_LONG_BITS),_to_cpu)(v)
209#else
210#define cpu_to_32wu cpu_to_le32wu
211#define leul_to_cpu(v) (v)
212#endif
213
214#undef le_bswap
215#undef be_bswap
216#undef le_bswaps
217#undef be_bswaps
218
219/* len must be one of 1, 2, 4 */
220static inline uint32_t qemu_bswap_len(uint32_t value, int len)
221{
222 return bswap32(value) >> (32 - 8 * len);
223}
224
225#endif /* BSWAP_H */
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