rotate.h

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00001 #ifndef _GPXE_ROTATE_H
00002 #define _GPXE_ROTATE_H
00003 
00004 /** @file
00005  *
00006  * Bit operations
00007  */
00008 
00009 FILE_LICENCE ( GPL2_OR_LATER );
00010 
00011 #include <stdint.h>
00012 
00013 static inline uint32_t rol32 ( uint32_t data, unsigned int rotation ) {
00014         return ( ( data << rotation ) | ( data >> ( 32 - rotation ) ) );
00015 }
00016 
00017 static inline uint32_t ror32 ( uint32_t data, unsigned int rotation ) {
00018         return ( ( data >> rotation ) | ( data << ( 32 - rotation ) ) );
00019 }
00020 
00021 static inline uint64_t rol64 ( uint64_t data, unsigned int rotation ) {
00022         return ( ( data << rotation ) | ( data >> ( 64 - rotation ) ) );
00023 }
00024 
00025 static inline uint64_t ror64 ( uint64_t data, unsigned int rotation ) {
00026         return ( ( data >> rotation ) | ( data << ( 64 - rotation ) ) );
00027 }
00028 
00029 #endif /* _GPXE_ROTATE_H */