Apparatus for enhanced tagged data processing in a generalized computer execution unit.

摘要

A method and apparatus for improving the efficiency of executing arithmetic and logical operations on arguments provided by the execution of Lisp or similar languages, wherein the variable type is accompanied by a tag identifier. The present invention enhances the processing of tag related with the addition of two condition codes derived from the values of the pre-ALU arguments and the post-ALU result. The condition codes allow rapid determination of data types without additional execution cycle or hardware overhead resulting in the enhanced execution of the Lisp programs.