Annotation of qemu/bswap.h, revision 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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