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Diffstat (limited to 'src/Util/ZUtil/Definitions.v')
| -rw-r--r-- | src/Util/ZUtil/Definitions.v | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/Util/ZUtil/Definitions.v b/src/Util/ZUtil/Definitions.v index af2d8239e..4ef6b5403 100644 --- a/src/Util/ZUtil/Definitions.v +++ b/src/Util/ZUtil/Definitions.v @@ -84,4 +84,9 @@ Module Z. := if s =? 2^Z.log2 s then mul_split_at_bitwidth (Z.log2 s) x y else ((x * y) mod s, (x * y) / s). + + Definition round_lor_land_bound (x : Z) : Z + := if (0 <=? x)%Z + then 2^(Z.log2_up (x+1))-1 + else -2^(Z.log2_up (-x)). End Z. |