发明授权
- 专利标题： Speculative counting of performance events with rewind counter
- 专利标题（中）： 用倒带计数器推测性能事件计数
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申请号： US10210357申请日： 2002-07-31
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公开(公告)号： US06910120B2公开(公告)日： 2005-06-21
- 发明人: Hung Qui Le , Alexander Erik Mericas , Robert Dominick Mirabella , Toshihiko Kurihara , Michitaka Okuno , Masahiro Tokoro
- 申请人： Hung Qui Le , Alexander Erik Mericas , Robert Dominick Mirabella , Toshihiko Kurihara , Michitaka Okuno , Masahiro Tokoro
- 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： Dillon & Yudell LLP
- 代理商 Mark E. McBurney
- 主分类号： G06F9/00
- IPC分类号： G06F9/00 ; G06F9/38 ; G06F11/34
摘要：
A circuit and method for maintaining a correct value in performance monitor counter within a speculative computer microprocessor is disclosed. In response to determining the begin of speculative execution within the microprocessor, the value of the performance monitor counter is stored in a rewind register. The performance monitor counter is incremented in response to predetermined events. If the microprocessor determines the speculative execution was incorrect, the value of the rewind register is loaded into the counter, restoring correct value for the counter.
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