src/include/gpxe/rotate.h

   1 #ifndef _GPXE_ROTATE_H
   2 #define _GPXE_ROTATE_H
   3
   4 /** @file
   5  *
   6  * Bit operations
   7  */
   8
   9 FILE_LICENCE ( GPL2_OR_LATER );
  10
  11 #include <stdint.h>
  12
  13 static inline uint32_t rol32 ( uint32_t data, unsigned int rotation ) {
  14         return ( ( data << rotation ) | ( data >> ( 32 - rotation ) ) );
  15 }
  16
  17 static inline uint32_t ror32 ( uint32_t data, unsigned int rotation ) {
  18         return ( ( data >> rotation ) | ( data << ( 32 - rotation ) ) );
  19 }
  20
  21 static inline uint64_t rol64 ( uint64_t data, unsigned int rotation ) {
  22         return ( ( data << rotation ) | ( data >> ( 64 - rotation ) ) );
  23 }
  24
  25 static inline uint64_t ror64 ( uint64_t data, unsigned int rotation ) {
  26         return ( ( data >> rotation ) | ( data << ( 64 - rotation ) ) );
  27 }
  28
  29 #endif /* _GPXE_ROTATE_H */