wimboot/wimboot-2.7.3/src/rotate.h

   1 #ifndef _ROTATE_H
   2 #define _ROTATE_H
   3
   4 /** @file
   5  *
   6  * Bit operations
   7  */
   8
   9 #include <stdint.h>
  10
  11 static inline __attribute__ (( always_inline )) uint8_t
  12 rol8 ( uint8_t data, unsigned int rotation ) {
  13         return ( ( data << rotation ) | ( data >> ( 8 - rotation ) ) );
  14 }
  15
  16 static inline __attribute__ (( always_inline )) uint8_t
  17 ror8 ( uint8_t data, unsigned int rotation ) {
  18         return ( ( data >> rotation ) | ( data << ( 8 - rotation ) ) );
  19 }
  20
  21 static inline __attribute__ (( always_inline )) uint16_t
  22 rol16 ( uint16_t data, unsigned int rotation ) {
  23         return ( ( data << rotation ) | ( data >> ( 16 - rotation ) ) );
  24 }
  25
  26 static inline __attribute__ (( always_inline )) uint16_t
  27 ror16 ( uint16_t data, unsigned int rotation ) {
  28         return ( ( data >> rotation ) | ( data << ( 16 - rotation ) ) );
  29 }
  30
  31 static inline __attribute__ (( always_inline )) uint32_t
  32 rol32 ( uint32_t data, unsigned int rotation ) {
  33         return ( ( data << rotation ) | ( data >> ( 32 - rotation ) ) );
  34 }
  35
  36 static inline __attribute__ (( always_inline )) uint32_t
  37 ror32 ( uint32_t data, unsigned int rotation ) {
  38         return ( ( data >> rotation ) | ( data << ( 32 - rotation ) ) );
  39 }
  40
  41 static inline __attribute__ (( always_inline )) uint64_t
  42 rol64 ( uint64_t data, unsigned int rotation ) {
  43         return ( ( data << rotation ) | ( data >> ( 64 - rotation ) ) );
  44 }
  45
  46 static inline __attribute__ (( always_inline )) uint64_t
  47 ror64 ( uint64_t data, unsigned int rotation ) {
  48         return ( ( data >> rotation ) | ( data << ( 64 - rotation ) ) );
  49 }
  50
  51 #endif /* _ROTATE_H */