发明授权
US09489207B2 Processor and method for partially flushing a dispatched instruction group including a mispredicted branch
有权
用于部分刷新分派指令组的处理器和方法,包括错误预测的分支
- 专利标题: Processor and method for partially flushing a dispatched instruction group including a mispredicted branch
- 专利标题(中): 用于部分刷新分派指令组的处理器和方法,包括错误预测的分支
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申请号: US12423495申请日: 2009-04-14
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公开(公告)号: US09489207B2公开(公告)日: 2016-11-08
- 发明人: William E. Burky , Brian R. Mestan , Dung Q. Nguyen , Balaram Sinharoy , Benjamin W. Stolt
- 申请人: William E. Burky , Brian R. Mestan , Dung Q. Nguyen , Balaram Sinharoy , Benjamin W. Stolt
- 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
- 代理商 Stephen R. Tkacs; Stephen J. Walder, Jr.; William J. Stock
- 主分类号: G06F9/30
- IPC分类号: G06F9/30 ; G06F9/38
摘要:
Mechanisms are provided for partial flush handling with multiple branches per instruction group. The instruction fetch unit sorts instructions into groups. A group may include a floating branch instruction and a boundary branch instruction. For each group of instructions, the instruction sequencing unit creates an entry in a global completion table (GCT), which may also be referred to herein as a group completion table. The instruction sequencing unit uses the GCT to manage completion of instructions within each outstanding group. Because each group may include up to two branches, the instruction sequencing unit may dispatch instructions beyond the first branch, i.e. the floating branch. Therefore, if the floating branch results in a misprediction, the processor performs a partial flush of that group, as well as a flush of every group younger than that group.
公开/授权文献
- US20100262807A1 Partial Flush Handling with Multiple Branches Per Group 公开/授权日:2010-10-14
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