Fri, 10 Aug 2001 17:06:15 -0500
The trick I guess is really that the pointer that you use is to the last
value stored. Thus you save one add.
The point is that the frontier starts out at one end. When you are done
initializing, some register will point to the other end. (The increments of
the register space cost is exactly offset by the saving of 1 byte because you
don't need an offset in the store.) Thus you can save an add if the last
location stored is what you use as the value.