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authorAkinobu Mita <akinobu.mita@gmail.com>2006-12-08 02:36:25 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 08:28:39 -0800
commita5cfc1ec58a07074dacb6aa8c79eff864c966d12 (patch)
tree5fbb16ee570ec1d9a9f6adbc7a5cc963e7ca93d8 /include
parent30e25b71e725b150585e17888b130e3324f8cf7c (diff)
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[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 <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/bitrev.h15
1 files changed, 15 insertions, 0 deletions
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 <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 */