System for target branch prediction using correlation of...

Details System for target branch prediction using correlation of... System for target branch prediction using correlation of...

2006-04-07

2008-10-07

Ellis, Richard (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

Branching

Reexamination Certificate

active

07434037

ABSTRACT:
An information processing system includes a branch target buffer (BTB) comprising the last next address for the instruction and for receiving an indirect instruction address and providing a BTB predicted target; and next branch target table (NBTT) for storing potential branch targets based on a history of the branch and for providing an NBTT when the a BTB predicted target is not successful. In another embodiment a system comprising a plurality of branch prediction resources dynamically predicts the best resource appropriate for a branch. The method includes predicting a target branch for an indirect instruction address using a resource chosen among the plurality of branch prediction resources; and selectively inhibiting updates of the branch prediction resources whose prediction accuracy does not meet a threshold.

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patent: 2004/0215720 (2004-10-01), Alexander et al.
Yahoo! Education, definition of “existing”.
Yahoo! Education, Dictionary definition for “embed”, www.yahoo.com.

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