I believe the parent was talking about the abstraction provided by the ISA, not whether it was a good way to program. None of this experiment cares about the ex

I believe the parent was talking about the abstraction provided by the ISA, not whether it was a good way to program. None of this experiment cares about the execution speed at all, it merely concerns itself with the technical feasibility of the technique in the ISA. This would not be possible at all in a load store oriented ISA, because you can’t ever do an alu instruction without first loading into a register.