law plk2

lawful-bytes@0.1.1.0 · proof_fast_word.bend:163

import Base
import lawful-bytes@0.1.1.0/defs.bend as D
import lawful-bytes@0.1.1.0/fast.bend as FA
import lawful-bytes@0.1.1.0/proof_core.bend as C

163law plk2:
164  for +w: U32
165  for +c: U32
166  for +hc: {U32.is_lt(c, 256) == True{} : Bool}
167  {P0(U32.or(U32.xor(w, FA.rep(c)), U32.not(U32.shln(4294967295, U32.to_nat(U32.shln(2, 3n)))))) == Nat.add(U32.to_nat(2), D.run_len(List.drop(&2, U32, C.L4(w), U32.to_nat(2)), c)) : Nat}