I think in a large CISC instruction set it's less surprising to see specialized instructions like this, but it stands out as a rather specific design choice in

I think in a large CISC instruction set it's less surprising to see specialized instructions like this, but it stands out as a rather specific design choice in something like SWEET16 that has such a minimal instruction set, and doesn't even have an indirect load/store without an increment/decrement (i.e., using C syntax, it let's you do a = * r++, but NOT a = * r).