Invention Grant
- Patent Title: Local and global branch prediction information storage
- Patent Title (中): 本地和全球分支预测信息存储
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Application No.: US12364350Application Date: 2009-02-02
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Publication No.: US07941654B2Publication Date: 2011-05-10
- Inventor: David A. Luick
- Applicant: David A. Luick
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Patterson & Sheridan LLP
- Main IPC: G06F9/00
- IPC: G06F9/00 ; G06F9/32

Abstract:
Embodiments of the invention provide an apparatus of storing branch prediction information. In one embodiment, an integrated circuit device includes a first table for storing local branch prediction information, a second table for storing global branch prediction information, and circuitry. The circuitry is configured to receive a branch instruction and store local branch prediction information for the branch instruction in the first table. The local branch prediction information includes a local predictability value for the local branch prediction information. The circuitry is further configured to store global branch prediction information for the branch instruction in the second table only if the local predictability value is below a threshold value of predictability.
Public/Granted literature
- US20090138690A1 LOCAL AND GLOBAL BRANCH PREDICTION INFORMATION STORAGE Public/Granted day:2009-05-28
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