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:
May. 11, 1993
Filed:
May. 15, 1990
Eric H Jensen, Livermore, CA (US);
Sun Microsystems, Inc., Mountain View, CA (US);
Abstract
A method and apparatus for loading a data value for a future LOAD instruction in a microprocessor by predicting the LOAD instruction's effective address. At each occurrence of a LOAD instruction, the effective address used is stored in a memory array which stores a last effective address and a next-to-last effective address. At a specified period before each LOAD instruction, the microprocessor loads a data value from a predicted effective memory address computed from the memory array. The predicted effective memory address is equal to the last effective address plus the difference between the last effective address and the next-to-last effective address. If the predicted effective address equals the actual effective address of the future LOAD instruction, the loaded data value is used.