HashLaneAlgo

hash_lanes permutation. Auto picks by the input's lane width: a 32-bit integer lane maps through Triple32, a 64-bit lane through Moremur. The named kinds select a permutation within that width: Triple32 and WeakTwoMul are 32-bit, Moremur, Feistel3Mul3 and Feistel4Mul2 are 64-bit; a kind of the other width is refused.