The data processing apparatus has first and second storages each independently accessible. An instruction unit applies a fetch request on a one-operand instruction to the first storage, and a fetch request on a two-operand instruction to the first and second storages. In case of a fetch request on a...http://www.google.com/patents/US4733344?utm_source=gb-gplus-sharePatent US4733344 - Data processing apparatus for controlling reading out of operands from two buffer storages
