def bits64.last_set

import bend-osdev-algo@0.1.0.0/algo.bend as Algo

import Base
import bend-osdev-word64@0.1.0.0/word64.bend as W

185def bits64.last_set(a: W.W64) -> Maybe<&2, Nat>:
186  bitw.index(bits64.fls(a))

Uses (5)