diff options
Diffstat (limited to 'include/linux/wordpart.h')
| -rw-r--r-- | include/linux/wordpart.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/wordpart.h b/include/linux/wordpart.h index c9e6bd773ebd..f6f8f83b15b0 100644 --- a/include/linux/wordpart.h +++ b/include/linux/wordpart.h @@ -2,6 +2,35 @@ #ifndef _LINUX_WORDPART_H #define _LINUX_WORDPART_H + +/** + * upper_32_bits - return bits 32-63 of a number + * @n: the number we're accessing + * + * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress + * the "right shift count >= width of type" warning when that quantity is + * 32-bits. + */ +#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) + +/** + * lower_32_bits - return bits 0-31 of a number + * @n: the number we're accessing + */ +#define lower_32_bits(n) ((u32)((n) & 0xffffffff)) + +/** + * upper_16_bits - return bits 16-31 of a number + * @n: the number we're accessing + */ +#define upper_16_bits(n) ((u16)((n) >> 16)) + +/** + * lower_16_bits - return bits 0-15 of a number + * @n: the number we're accessing + */ +#define lower_16_bits(n) ((u16)((n) & 0xffff)) + /** * REPEAT_BYTE - repeat the value @x multiple times as an unsigned long value * @x: value to repeat |