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#ifndef _BITS_BYTESWAP_H
#define _BITS_BYTESWAP_H 1
#define ___swab16(x) \
({ \
unsigned short __x = (x); \
((unsigned short)( \
(((unsigned short)(__x) & (unsigned short)0x00ffU) << 8) | \
(((unsigned short)(__x) & (unsigned short)0xff00U) >> 8) )); \
})
#define ___swab32(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) )); \
})
/* these are CRIS specific */
static inline unsigned short __fswab16(unsigned short x)
{
__asm__ ("swapb %0" : "=r" (x) : "0" (x));
return(x);
}
static inline unsigned long __fswab32(unsigned long x)
{
__asm__ ("swapwb %0" : "=r" (x) : "0" (x));
return(x);
}
# define __bswap_16(x) \
(__builtin_constant_p((unsigned short)(x)) ? \
___swab16((x)) : \
__fswab16((x)))
# define __bswap_32(x) \
(__builtin_constant_p((unsigned long)(x)) ? \
___swab32((x)) : \
__fswab32((x)))
#if defined __GNUC__ && __GNUC__ >= 2
/* 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))
# 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; }))
#endif
#endif /* _BITS_BYTESWAP_H */
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