File:  [Qemu by Fabrice Bellard] / qemu / bswap.h
Revision 1.1.1.7 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 18:34:17 2018 UTC (2 years, 2 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu1000, qemu0151, qemu0150, qemu0141, qemu0140, HEAD
qemu 0.14.0

    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) \
   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 /* !CONFIG_BYTESWAP_H */
   51: 
   52: static inline uint16_t bswap16(uint16_t x)
   53: {
   54:     return bswap_16(x);
   55: }
   56: 
   57: static inline uint32_t bswap32(uint32_t x)
   58: {
   59:     return bswap_32(x);
   60: }
   61: 
   62: static inline uint64_t bswap64(uint64_t x)
   63: {
   64:     return bswap_64(x);
   65: }
   66: 
   67: #endif /* ! CONFIG_MACHINE_BSWAP_H */
   68: 
   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(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)\
   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: 
  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: #define cpu_to_be64wu(p, v) cpu_to_be64w(p, v)
  148: 
  149: #else
  150: 
  151: static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
  152: {
  153:     uint8_t *p1 = (uint8_t *)p;
  154: 
  155:     p1[0] = v & 0xff;
  156:     p1[1] = v >> 8;
  157: }
  158: 
  159: static inline void cpu_to_le32wu(uint32_t *p, uint32_t v)
  160: {
  161:     uint8_t *p1 = (uint8_t *)p;
  162: 
  163:     p1[0] = v & 0xff;
  164:     p1[1] = v >> 8;
  165:     p1[2] = v >> 16;
  166:     p1[3] = v >> 24;
  167: }
  168: 
  169: static inline uint16_t le16_to_cpupu(const uint16_t *p)
  170: {
  171:     const uint8_t *p1 = (const uint8_t *)p;
  172:     return p1[0] | (p1[1] << 8);
  173: }
  174: 
  175: static inline uint32_t le32_to_cpupu(const uint32_t *p)
  176: {
  177:     const uint8_t *p1 = (const uint8_t *)p;
  178:     return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24);
  179: }
  180: 
  181: static inline uint32_t be32_to_cpupu(const uint32_t *p)
  182: {
  183:     const uint8_t *p1 = (const uint8_t *)p;
  184:     return p1[3] | (p1[2] << 8) | (p1[1] << 16) | (p1[0] << 24);
  185: }
  186: 
  187: static inline void cpu_to_be16wu(uint16_t *p, uint16_t v)
  188: {
  189:     uint8_t *p1 = (uint8_t *)p;
  190: 
  191:     p1[0] = v >> 8;
  192:     p1[1] = v & 0xff;
  193: }
  194: 
  195: static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
  196: {
  197:     uint8_t *p1 = (uint8_t *)p;
  198: 
  199:     p1[0] = v >> 24;
  200:     p1[1] = v >> 16;
  201:     p1[2] = v >> 8;
  202:     p1[3] = v & 0xff;
  203: }
  204: 
  205: static inline void cpu_to_be64wu(uint64_t *p, uint64_t v)
  206: {
  207:     uint8_t *p1 = (uint8_t *)p;
  208: 
  209:     p1[0] = v >> 56;
  210:     p1[1] = v >> 48;
  211:     p1[2] = v >> 40;
  212:     p1[3] = v >> 32;
  213:     p1[4] = v >> 24;
  214:     p1[5] = v >> 16;
  215:     p1[6] = v >> 8;
  216:     p1[7] = v & 0xff;
  217: }
  218: 
  219: #endif
  220: 
  221: #ifdef HOST_WORDS_BIGENDIAN
  222: #define cpu_to_32wu cpu_to_be32wu
  223: #define leul_to_cpu(v) glue(glue(le,HOST_LONG_BITS),_to_cpu)(v)
  224: #else
  225: #define cpu_to_32wu cpu_to_le32wu
  226: #define leul_to_cpu(v) (v)
  227: #endif
  228: 
  229: #undef le_bswap
  230: #undef be_bswap
  231: #undef le_bswaps
  232: #undef be_bswaps
  233: 
  234: /* len must be one of 1, 2, 4 */
  235: static inline uint32_t qemu_bswap_len(uint32_t value, int len)
  236: {
  237:     return bswap32(value) >> (32 - 8 * len);
  238: }
  239: 
  240: #endif /* BSWAP_H */

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