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:
Jun. 20, 2006
Filed:
Dec. 17, 2003
Method for handling condition code modifiers in an out-of-order multi-issue multi-stranded processor
Rabin A. Sugumar, Sunnyvale, CA (US);
Sorin Iacobovici, San Jose, CA (US);
Chandra M. R. Thimmannagari, Fremont, CA (US);
Rabin A. Sugumar, Sunnyvale, CA (US);
Sorin Iacobovici, San Jose, CA (US);
Chandra M. R. Thimmannagari, Fremont, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A technique for handling a condition code modifying instruction in an out-of-order multi-stranded processor involves providing a condition code architectural register file for each strand, providing a condition code working register file, and assigning condition code architectural register file identification information (CARF_ID) and condition code working register file identification information (CWRF_ID) to the condition code modifying instruction. CARF_ID is used to index a location in a condition code rename table to which the CWRF_ID is stored. Thereafter, upon an exception-free execution of the condition code modifying instruction, a result of the execution is copied from the condition code working register file to the condition code architectural register file dependent on CARF_ID, CWRF_ID, register type information, and strand identification information.