law bit_ext
import lawful-words@0.1.0.0/proof_u32.bend as ProofU32import Base
import lawful-words@0.1.0.0/defs.bend as D
1321law bit_ext:
1322 for +a: U32
1323 for +b: U32
1324 for h: @k: Nat -> {D.bit(a, k) == D.bit(b, k) : Bool}
1325 {a == b : U32}