def rotate

bend-collections@1.0.0.0 · spec/crypto/keccak/permutation.bend:22

import Base
import bend-collections@1.0.0.0/src/crypto/keccak/types.bend as T

22def rotate(a: T.Lane, +n: Nat) -> T.Lane:
23  match a n:
24    case T.W{lo,hi} 0n: T.W{lo,hi}
25    case T.W{lo,hi} 32n: T.W{hi,lo}
26    case T.W{lo,hi} n: rotate_nonzero(lo,hi,n,Nat.is_lt(n,32n))