#ifndef _LINUX_BITREV_H#define _LINUX_BITREV_H #include <linux/types.h> #ifdef CONFIG_HAVE_ARCH_BITREVERSE#include <asm/bitrev.h> #define __bitrev32 __arch_bitrev32#define __bitrev16 __arch_bitrev16#define __bitrev8 __arch_bitrev8 #elseextern u8 const byte_rev_table[256];static inline u8 __bitrev8(u8 byte){	return byte_rev_table[byte];} static inline u16 __bitrev16(u16 x){	return (__bitrev8(x & 0xff) << 8) | __bitrev8(x >> 8);} static inline u32 __bitrev32(u32 x){	return (__bitrev16(x & 0xffff) << 16) | __bitrev16(x >> 16);} #endif /* CONFIG_HAVE_ARCH_BITREVERSE */ #define __constant_bitrev32(x)	\({					\	u32 __x = x;			\	__x = (__x >> 16) | (__x << 16);	\	__x = ((__x & (u32)0xFF00FF00UL) >> 8) | ((__x & (u32)0x00FF00FFUL) << 8);	\	__x = ((__x & (u32)0xF0F0F0F0UL) >> 4) | ((__x & (u32)0x0F0F0F0FUL) << 4);	\	__x = ((__x & (u32)0xCCCCCCCCUL) >> 2) | ((__x & (u32)0x33333333UL) << 2);	\	__x = ((__x & (u32)0xAAAAAAAAUL) >> 1) | ((__x & (u32)0x55555555UL) << 1);	\	__x;								\}) #define __constant_bitrev16(x)	\({					\	u16 __x = x;			\	__x = (__x >> 8) | (__x << 8);	\	__x = ((__x & (u16)0xF0F0U) >> 4) | ((__x & (u16)0x0F0FU) << 4);	\	__x = ((__x & (u16)0xCCCCU) >> 2) | ((__x & (u16)0x3333U) << 2);	\	__x = ((__x & (u16)0xAAAAU) >> 1) | ((__x & (u16)0x5555U) << 1);	\	__x;								\}) #define __constant_bitrev8(x)	\({					\	u8 __x = x;			\	__x = (__x >> 4) | (__x << 4);	\	__x = ((__x & (u8)0xCCU) >> 2) | ((__x & (u8)0x33U) << 2);	\	__x = ((__x & (u8)0xAAU) >> 1) | ((__x & (u8)0x55U) << 1);	\	__x;								\}) #define bitrev32(x) \({			\	u32 __x = x;	\	__builtin_constant_p(__x) ?	\	__constant_bitrev32(__x) :			\	__bitrev32(__x);				\}) #define bitrev16(x) \({			\	u16 __x = x;	\	__builtin_constant_p(__x) ?	\	__constant_bitrev16(__x) :			\	__bitrev16(__x);				\ }) #define bitrev8(x) \({			\	u8 __x = x;	\	__builtin_constant_p(__x) ?	\	__constant_bitrev8(__x) :			\	__bitrev8(__x)	;			\ })#endif /* _LINUX_BITREV_H */