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:
Jan. 02, 1996
Filed:
Mar. 19, 1993
Faraydon Karim, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A super scalar computer architecture and method of operation for executing instructions out-of-order while managing for data dependencies, data anti-dependencies, and integrity of sequentiality for precise interrupts, restarts and branch deletions. Multiple registers and tables are used to rename and recycle source and destination addresses referenced to a general purpose register. Access to destination data in the general purpose register is locked until the instruction associated with the data is fully executed. Renaming of both the source and destination registers avoids anti-dependency problems while integrity of sequentiality is maintained by ordered retirement of instruction results consistent with the order of the input instructions. The system and method operate with multiple input instructions and multiple execution units. The control words generated by the renaming of the source and destination registers differ insignificantly from the original instructions, obviating the practice of adding status and sequence information to processor control words.