diff options
Diffstat (limited to 'include/qemu/range.h')
| -rw-r--r-- | include/qemu/range.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/qemu/range.h b/include/qemu/range.h index 205e1da..d446ad8 100644 --- a/include/qemu/range.h +++ b/include/qemu/range.h @@ -20,6 +20,8 @@ #ifndef QEMU_RANGE_H #define QEMU_RANGE_H +#include "qemu/bitops.h" + /* * Operations on 64 bit address ranges. * Notes: @@ -208,8 +210,8 @@ static inline int range_covers_byte(uint64_t offset, uint64_t len, /* Check whether 2 given ranges overlap. * Undefined if ranges that wrap around 0. */ -static inline int ranges_overlap(uint64_t first1, uint64_t len1, - uint64_t first2, uint64_t len2) +static inline bool ranges_overlap(uint64_t first1, uint64_t len1, + uint64_t first2, uint64_t len2) { uint64_t last1 = range_get_last(first1, len1); uint64_t last2 = range_get_last(first2, len2); @@ -217,6 +219,15 @@ static inline int ranges_overlap(uint64_t first1, uint64_t len1, return !(last2 < first1 || last1 < first2); } +/* Get highest non-zero bit position of a range */ +static inline int range_get_last_bit(Range *range) +{ + if (range_is_empty(range)) { + return -1; + } + return 63 - clz64(range->upb); +} + /* * Return -1 if @a < @b, 1 @a > @b, and 0 if they touch or overlap. * Both @a and @b must not be empty. |