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[PATCH] bit reverse library

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This patch provides two bit reverse functions and bit reverse table.

- reverse the order of bits in a u32 value

	u8 bitrev8(u8 x);

- reverse the order of bits in a u32 value

	u32 bitrev32(u32 x);

- byte reverse table

	const u8 byte_rev_table[256];

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Akinobu Mita 2006-12-08 02:36:25 -08:00 • committed by Linus Torvalds
parent 30e25b71e7
commit a5cfc1ec58
4 changed files with 73 additions and 0 deletions
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15
include/linux/bitrev.h Normal file
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#ifndef _LINUX_BITREV_H
#define _LINUX_BITREV_H
#include <linux/types.h>
extern u8 const byte_rev_table[256];
static inline u8 bitrev8(u8 byte)
{
return byte_rev_table[byte];
}
extern u32 bitrev32(u32 in);
#endif /* _LINUX_BITREV_H */