The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1996
Filed:
Apr. 18, 1995
George M Uhler, Marlborough, MA (US);
George G Mills, Marlborough, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A pipelined, microcoded CPU employs conditional branching in microcode execution Data path conditions produced by one microinstruction are used in the selection of a following microinstruction. In high-performance systems, multiple cycle microbranch latency requires that the generation of microbranch conditions be pipelined. Usually a microbranch condition is used exactly once, at the earliest possible time, when dynamic microbranch conditions are only valid a fixed number of microinstructions later in the pipeline. Flexibility of the microcode algorithm is increased by selectively inhibiting the update of the dynamic conditions to delay the use of the condition by one or more cycles, under microcode control, thereby implementing dynamic microbranches, while allowing use of previous dynamic microbranch state.