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author | Stefan Weil <sw@weilnetz.de> | 2013-09-12 21:13:12 +0200 |
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committer | Stefan Weil <sw@weilnetz.de> | 2013-09-25 21:22:33 +0200 |
commit | 6aa25b4a7bb10c48c3054f268d5be98e42ea42c0 (patch) | |
tree | 47b2a03f60cce9d4bbbc7c874a1f720d0f18e091 /include/qemu/bitops.h | |
parent | d285bf784b6234e994ce73c05c82c9fb6429df00 (diff) | |
download | hqemu-6aa25b4a7bb10c48c3054f268d5be98e42ea42c0.zip hqemu-6aa25b4a7bb10c48c3054f268d5be98e42ea42c0.tar.gz |
bitops: Add rotate functions (rol8, ror8, ...)
These functions were copies from include/linux/bitopts.h.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include/qemu/bitops.h')
-rw-r--r-- | include/qemu/bitops.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 06e2e6f..304c90c 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -184,6 +184,86 @@ static inline unsigned long hweight_long(unsigned long w) } /** + * rol8 - rotate an 8-bit value left + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint8_t rol8(uint8_t word, unsigned int shift) +{ + return (word << shift) | (word >> (8 - shift)); +} + +/** + * ror8 - rotate an 8-bit value right + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint8_t ror8(uint8_t word, unsigned int shift) +{ + return (word >> shift) | (word << (8 - shift)); +} + +/** + * rol16 - rotate a 16-bit value left + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint16_t rol16(uint16_t word, unsigned int shift) +{ + return (word << shift) | (word >> (16 - shift)); +} + +/** + * ror16 - rotate a 16-bit value right + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint16_t ror16(uint16_t word, unsigned int shift) +{ + return (word >> shift) | (word << (16 - shift)); +} + +/** + * rol32 - rotate a 32-bit value left + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint32_t rol32(uint32_t word, unsigned int shift) +{ + return (word << shift) | (word >> (32 - shift)); +} + +/** + * ror32 - rotate a 32-bit value right + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint32_t ror32(uint32_t word, unsigned int shift) +{ + return (word >> shift) | (word << (32 - shift)); +} + +/** + * rol64 - rotate a 64-bit value left + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint64_t rol64(uint64_t word, unsigned int shift) +{ + return (word << shift) | (word >> (64 - shift)); +} + +/** + * ror64 - rotate a 64-bit value right + * @word: value to rotate + * @shift: bits to roll + */ +static inline uint64_t ror64(uint64_t word, unsigned int shift) +{ + return (word >> shift) | (word << (64 - shift)); +} + +/** * extract32: * @value: the value to extract the bit field from * @start: the lowest bit in the bit field (numbered from 0) |