Annotation of qemu/bswap.h, revision 1.1.1.3

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: 
                    154:     p1[0] = v;
                    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: 
                    162:     p1[0] = v;
                    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;
                    191:     p1[1] = v;
                    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;
                    201:     p1[3] = v;
                    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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