- 专利标题: Branch prediction using multi-way pattern history table (PHT) and global path vector (GPV)
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申请号: US14448030申请日: 2014-07-31
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公开(公告)号: US10534611B2公开(公告)日: 2020-01-14
- 发明人: James J. Bonanno , Matthias D. Heizmann , Daniel Lipetz , Brian R. Prasky
- 申请人: International Business Machines Corporation
- 申请人地址: US NY Armonk
- 专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人地址: US NY Armonk
- 代理机构: Cantor Colburn LLP
- 代理商 William Kinnaman
- 主分类号: G06F9/38
- IPC分类号: G06F9/38
摘要:
Embodiments relate to branch prediction using a pattern history table (PHT) that is indexed using a global path vector (GPV). An aspect includes receiving a search address by a branch prediction logic that is in communication with the PHT and the GPV. Another aspect includes starting with the search address, simultaneously determining a plurality of branch predictions by the branch prediction logic based on the PHT, wherein the plurality of branch predictions comprises one of: (i) at least one not taken prediction and a single taken prediction, and (ii) a plurality of not taken predictions. Another aspect includes updating the GPV by shifting an instruction identifier of a branch instruction associated with a taken prediction into the GPV, wherein the GPV is not updated based on any not taken prediction.
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