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. 29, 2015
Filed:
May. 06, 2008
Paul Caprioli, Santa Clara, CA (US);
Martin Karlsson, San Francisco, CA (US);
Shailender Chaudhry, San Francisco, CA (US);
Gideon N. Levinsky, Austin, TX (US);
Paul Caprioli, Santa Clara, CA (US);
Martin Karlsson, San Francisco, CA (US);
Shailender Chaudhry, San Francisco, CA (US);
Gideon N. Levinsky, Austin, TX (US);
ORACLE AMERICA, INC., Redwood Shores, CA (US);
Abstract
Embodiments of the present invention provide a system which executes a load instruction or a store instruction. During operation the system receives a load instruction. The system then determines if an unrestricted entry or a restricted entry in a store queue contains data that satisfies the load instruction. If not, the system retrieves data for the load instruction from a cache. If so, the system conditionally forwards data from the unrestricted entry or the restricted entry by: (1) forwarding data from an unrestricted entry that contains the youngest store that satisfies the load instruction when any number of unrestricted or restricted entries contain data that satisfies the load instruction; (2) forwarding data from an unrestricted entry when only one restricted entry and no unrestricted entries contain data that satisfies the load instruction; and (3) deferring the load instruction by placing the load instruction in a deferred queue when two or more restricted entries and no unrestricted entries contain data that satisfies the load instruction.