def bits64.first_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

182def bits64.first_set(a: W.W64) -> Maybe<&2, Nat>:
183  bitw.index(bits64.ffs(a))

Uses (5)