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:
Sep. 04, 2001
Filed:
Mar. 05, 1999
John Edward Derrick, Round Rock, TX (US);
Lee Evan Eisen, Austin, TX (US);
Hung Qui Le, Austin, TX (US);
Brian R. Konigsburg, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system for determining if a dispatch slot is required in a processing system is disclosed. The method and system comprises a plurality of predecode bits to provide routing information and utilizing the predecode bits to allow instructions to be directed to specific decode slots and to obey dispatch constraints without examining the instructions. The purpose of this precode encoding system scheme is to provide the most information possible about the grouping of the instructions without increasing the complexity of the logic which uses this information for decode and group formation. In a preferred embodiment, pre-decode bits for each instruction that may be issued in parallel are analyzed and the multiplexer controls are retained for each of the possible starting positions within the stream of instructions.