Annotation of qemu/bswap.h, revision 1.1.1.1

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

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