发明名称 |
SEGMENTED PIPELINE FLUSHING FOR MISPREDICTED BRANCHES |
摘要 |
<p>A processor pipeline is segmented into an upper portion-prior to instructions going out of program order-and one or more lower portions beyond the upper portion. The upper pipeline is flushed upon detecting that a branch instruction was mispredicted, minimizing the delay in fetching of instructions from the correct branch target address. The lower pipelines may continue execution until the mispredicted branch instruction confirms, at which time all uncommitted instructions are flushed from the lower pipelines. Existing exception pipeline flushing mechanisms may be utilized, by adding a mispredicted branch identifier, reducing the complexity and hardware cost of flushing the lower pipelines.</p> |
申请公布号 |
EP2115572(A1) |
申请公布日期 |
2009.11.11 |
申请号 |
EP20080713995 |
申请日期 |
2008.01.24 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
MCILVAINE, MICHAEL SCOTT;DIEFFENDERFER, JAMES NORRIS;SARTORIUS, THOMAS ANDREW;SMITH, RODNEY WAYNE |
分类号 |
G06F9/30;G06F9/38 |
主分类号 |
G06F9/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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