| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283 |
- #ifndef _BITS_BYTESWAP_H
- #define _BITS_BYTESWAP_H 1
- /* CRIS specific byte swap operations: 16, 32 and 64-bit */
- /* Swap bytes in 16 bit value. */
- #define __bswap_constant_16(x) \
- ({ \
- unsigned short __x = (x); \
- ((unsigned short)( \
- (((unsigned short)(__x) & (unsigned short)0x00ffu) << 8) | \
- (((unsigned short)(__x) & (unsigned short)0xff00u) >> 8) )); \
- })
- #if defined __GNUC__ && __GNUC__ >= 2
- # define __bswap_16(x) \
- __extension__ \
- ({ unsigned short __bswap_16_v; \
- if (__builtin_constant_p (x)) \
- __bswap_16_v = __bswap_constant_16 (x); \
- else \
- __asm__ ("swapb %0" : "=r" (__bswap_16_v) : "0" (x)); \
- __bswap_16_v; })
- #else
- # define __bswap_16(x) __bswap_constant_16 (x)
- #endif
- /* Swap bytes in 32 bit value. */
- #define __bswap_constant_32(x) \
- ({ \
- unsigned long __x = (x); \
- ((unsigned long)( \
- (((unsigned long)(__x) & (unsigned long)0x000000fful) << 24) | \
- (((unsigned long)(__x) & (unsigned long)0x0000ff00ul) << 8) | \
- (((unsigned long)(__x) & (unsigned long)0x00ff0000ul) >> 8) | \
- (((unsigned long)(__x) & (unsigned long)0xff000000ul) >> 24) )); \
- })
- #if defined __GNUC__ && __GNUC__ >= 2
- # define __bswap_32(x) \
- __extension__ \
- ({ unsigned long __bswap_32_v; \
- if (__builtin_constant_p (x)) \
- __bswap_32_v = __bswap_constant_32 (x); \
- else \
- __asm__ ("swapwb %0" : "=r" (__bswap_32_v) : "0" (x)); \
- __bswap_32_v; })
- #else
- # define __bswap_32(x) __bswap_constant_32 (x)
- #endif
- /* Swap bytes in 64 bit value. */
- # define __bswap_constant_64(x) \
- ((((x) & 0xff00000000000000ull) >> 56) \
- | (((x) & 0x00ff000000000000ull) >> 40) \
- | (((x) & 0x0000ff0000000000ull) >> 24) \
- | (((x) & 0x000000ff00000000ull) >> 8) \
- | (((x) & 0x00000000ff000000ull) << 8) \
- | (((x) & 0x0000000000ff0000ull) << 24) \
- | (((x) & 0x000000000000ff00ull) << 40) \
- | (((x) & 0x00000000000000ffull) << 56))
- #if defined __GNUC__ && __GNUC__ >= 2
- # define __bswap_64(x) \
- (__extension__ \
- ({ union { __extension__ unsigned long long int __ll; \
- unsigned int __l[2]; } __w, __r; \
- if (__builtin_constant_p (x)) \
- __r.__ll = __bswap_constant_64 (x); \
- else \
- { \
- __w.__ll = (x); \
- __r.__l[0] = __bswap_32 (__w.__l[1]); \
- __r.__l[1] = __bswap_32 (__w.__l[0]); \
- } \
- __r.__ll; }))
- #else
- # define __bswap_64(x) __bswap_constant_64 (x)
- #endif
- #endif /* _BITS_BYTESWAP_H */
|
