发明申请
US20050027975A1 Recovery of global history vector in the event of a non-branch flush
失效
在非分支刷新的情况下恢复全局历史向量
- 专利标题: Recovery of global history vector in the event of a non-branch flush
- 专利标题(中): 在非分支刷新的情况下恢复全局历史向量
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申请号: US10631055申请日: 2003-07-31
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公开(公告)号: US20050027975A1公开(公告)日: 2005-02-03
- 发明人: Scott Frommer , Balaram Sinharoy
- 申请人: Scott Frommer , Balaram Sinharoy
- 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
- 主分类号: G06F9/00
- IPC分类号: G06F9/00 ; G06F9/38
摘要:
A method and system for recovering a global history vector. In the event of a non-branch flush, a tag may be received by a queue configured to store information about branch instructions. The queue may read a copy of the global history vector from an entry indexed by the tag. This copy may be inserted in a global history vector mechanism (“GHV mechanism”) configured to manage the global history vector. If the flush operation is a flush to a group of instructions that contains no branch instructions and the tag does not equal the next-to-write pointer in the queue, then the queue may transmit a command to the GHV mechanism to enter a mode where the GHV mechanism does not update the global history vector until the next branch instruction is fetched.
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