Annotation of qemu/bswap.h, revision 1.1.1.4
1.1 root 1: #ifndef BSWAP_H
2: #define BSWAP_H
3:
4: #include "config-host.h"
5:
6: #include <inttypes.h>
7:
1.1.1.3 root 8: #ifdef HAVE_MACHINE_BSWAP_H
9: #include <sys/endian.h>
10: #include <sys/types.h>
11: #include <machine/bswap.h>
12: #else
13:
1.1 root 14: #ifdef HAVE_BYTESWAP_H
15: #include <byteswap.h>
16: #else
17:
18: #define bswap_16(x) \
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) \
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) \
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 /* !HAVE_BYTESWAP_H */
51:
52: static inline uint16_t bswap16(uint16_t x)
53: {
54: return bswap_16(x);
55: }
56:
1.1.1.2 root 57: static inline uint32_t bswap32(uint32_t x)
1.1 root 58: {
59: return bswap_32(x);
60: }
61:
1.1.1.2 root 62: static inline uint64_t bswap64(uint64_t x)
1.1 root 63: {
64: return bswap_64(x);
65: }
66:
1.1.1.3 root 67: #endif /* ! HAVE_MACHINE_BSWAP_H */
68:
1.1 root 69: static inline void bswap16s(uint16_t *s)
70: {
71: *s = bswap16(*s);
72: }
73:
74: static inline void bswap32s(uint32_t *s)
75: {
76: *s = bswap32(*s);
77: }
78:
79: static inline void bswap64s(uint64_t *s)
80: {
81: *s = bswap64(*s);
82: }
83:
84: #if defined(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)\
97: static inline type endian ## size ## _to_cpu(type v)\
98: {\
99: return endian ## _bswap(v, size);\
100: }\
101: \
102: static inline type cpu_to_ ## endian ## size(type v)\
103: {\
104: return endian ## _bswap(v, size);\
105: }\
106: \
107: static inline void endian ## size ## _to_cpus(type *p)\
108: {\
109: endian ## _bswaps(p, size)\
110: }\
111: \
112: static inline void cpu_to_ ## endian ## size ## s(type *p)\
113: {\
114: endian ## _bswaps(p, size)\
115: }\
116: \
117: static inline type endian ## size ## _to_cpup(const type *p)\
118: {\
119: return endian ## size ## _to_cpu(*p);\
120: }\
121: \
122: static inline void cpu_to_ ## endian ## size ## w(type *p, type v)\
123: {\
124: *p = cpu_to_ ## endian ## size(v);\
125: }
126:
127: CPU_CONVERT(be, 16, uint16_t)
128: CPU_CONVERT(be, 32, uint32_t)
129: CPU_CONVERT(be, 64, uint64_t)
130:
131: CPU_CONVERT(le, 16, uint16_t)
132: CPU_CONVERT(le, 32, uint32_t)
133: CPU_CONVERT(le, 64, uint64_t)
134:
135: /* unaligned versions (optimized for frequent unaligned accesses)*/
136:
1.1.1.3 root 137: #if defined(__i386__) || defined(_ARCH_PPC)
1.1 root 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)
1.1.1.3 root 143: #define be32_to_cpupu(p) be32_to_cpup(p)
1.1 root 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:
150: static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
151: {
152: uint8_t *p1 = (uint8_t *)p;
153:
1.1.1.4 ! root 154: p1[0] = v & 0xff;
1.1 root 155: p1[1] = v >> 8;
156: }
157:
158: static inline void cpu_to_le32wu(uint32_t *p, uint32_t v)
159: {
160: uint8_t *p1 = (uint8_t *)p;
161:
1.1.1.4 ! root 162: p1[0] = v & 0xff;
1.1 root 163: p1[1] = v >> 8;
164: p1[2] = v >> 16;
165: p1[3] = v >> 24;
166: }
167:
168: static 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:
174: static 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:
1.1.1.3 root 180: static 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:
1.1 root 186: static 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;
1.1.1.4 ! root 191: p1[1] = v & 0xff;
1.1 root 192: }
193:
194: static 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;
1.1.1.4 ! root 201: p1[3] = v & 0xff;
1.1 root 202: }
203:
204: #endif
205:
206: #ifdef WORDS_BIGENDIAN
207: #define cpu_to_32wu cpu_to_be32wu
208: #else
209: #define cpu_to_32wu cpu_to_le32wu
210: #endif
211:
212: #undef le_bswap
213: #undef be_bswap
214: #undef le_bswaps
215: #undef be_bswaps
216:
217: #endif /* BSWAP_H */
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