From a5cfc1ec58a07074dacb6aa8c79eff864c966d12 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 8 Dec 2006 02:36:25 -0800 Subject: [PATCH] bit reverse library 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/bitrev.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 include/linux/bitrev.h (limited to 'include/linux/bitrev.h') diff --git a/include/linux/bitrev.h b/include/linux/bitrev.h new file mode 100644 index 000000000000..05e540d6963a --- /dev/null +++ b/include/linux/bitrev.h @@ -0,0 +1,15 @@ +#ifndef _LINUX_BITREV_H +#define _LINUX_BITREV_H + +#include + +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 */ -- cgit v1.2.3-59-g8ed1b