Re: most efficient RISC instruction

From: Dave McKenzie <davemck@zbiggroup.com>
> Larry's probably thinking of the "with update" family of instructions,
e.g.:
> Load Doubleword with Update Indexed  X-form
>
>   ldux    RT,RA,RB
>
> EA <- (RA) + (RB)
> RT <- MEM(EA, 8)
> RA <- EA
>
> Let the effective address (EA) be the sum (RA)+(RB).  The doubleword in
storage addressed by EA is loaded into RT.
>
> EA is placed into register RA.
>
> If RA=0 or RA=RT, the instruction form is invalid.


but this instruction does not increment the pointer in memory.
If Larry knows about an undocumented instruction, let him tell us.
Among the documented instructions there are none that updates
the pointer.