def u64.hi
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytesimport Base
import bend-kit-int@0.2.0.0/int.bend as Int
255def u64.hi(+i: U32, +be: Bool, r: Bytes & Maybe<&2, U32>) -> Bytes & Maybe<&2, Int.U64>:
256 (b, x) = r
257 u64.lo(be, x, uint(b, (i + 4 : U32), 4, be))