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| -rw-r--r-- | include/common.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h index e7ab5feeac..9919fa4f5d 100644 --- a/include/common.h +++ b/include/common.h @@ -281,6 +281,22 @@ void barebox_set_hostname(const char *); } \ ) +/** + * 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)) + #define abs(x) ({ \ long __x = (x); \ (__x < 0) ? -__x : __x; \ |