If the arrays are in one contiguous block, I think this is equivalent to a 2-way shuffle in place, here's a neat paper on it: https://arxiv.org/pdf/0805.1598.pd

If the arrays are in one contiguous block, I think this is equivalent to a 2-way shuffle in place, here's a neat paper on it: https://arxiv.org/pdf/0805.1598.pdf https://arxiv.org/pdf/0805.1598.pdf