Review: Basic ISA Classes

1 address add A acc ¬ acc + mem[A]

1+x address addx A acc ¬ acc + mem[A + x]

Stack:

0 address add tos ¬ tos + next (JAVA VM)

General Purpose Register:

2 address add A B A ¬ A + B

3 address add A B C A ¬ B + C

Load/Store:

3 address add Ra Rb Rc Ra ¬ Rb + Rc

load Ra Rb Ra ¬ mem[Rb]

store Ra Rb mem[Rb] ¬ Ra