Invention Grant
- Patent Title: Power efficient pattern history table fetch in branch predictor
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Application No.: US12947401Application Date: 2010-11-16
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Publication No.: US09778934B2Publication Date: 2017-10-03
- Inventor: Anthony Jarvis , James David Dundas
- Applicant: Anthony Jarvis , James David Dundas
- Applicant Address: US CA Sunnyvale
- Assignee: Advanced Micro Devices, Inc.
- Current Assignee: Advanced Micro Devices, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Volpe and Koenig, P.C.
- Main IPC: G06F9/38
- IPC: G06F9/38

Abstract:
A method and apparatus for branch prediction is disclosed. A pattern history table (PHT) is accessed based on at least one global history value to obtain a prediction value. The prediction value and the at least one global history value used to obtain the prediction value are placed in a queue. If a branch prediction is requested, the queue is accessed to obtain a prediction value. The queue may include any number of entries and the queue maintains the oldest prediction value at the head of the queue. The prediction value at the head of the queue is used when a branch prediction is needed.
Public/Granted literature
- US20120124349A1 POWER EFFICIENT PATTERN HISTORY TABLE FETCH IN BRANCH PREDICTOR Public/Granted day:2012-05-17
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