def pad0
import bend-collections@1.0.0.0/src/crypto/keccak/keccak.bend as Keccakimport Base
import bend-collections@1.0.0.0/src/crypto/keccak/types.bend as T
300def pad0(+round_count: Nat,+remain: Nat, +index: U32, s: T.State, pair: Array<U32> & U32) -> T.State:
301 (a,w0) = pair
302 pad1(round_count,remain,index,s,w0,Array.get(U32,a,U32.add(index,1)))