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1. 发明授权

US6014742A Trace branch prediction unit 失效
标题翻译：跟踪分支预测单元
公开(公告)号：US6014742A
公开(公告)日：2000-01-11
申请号：US2166
申请日：1997-12-31
申请人： Robert Franklin Krick , Chan Woo Lee , Reynold Viriato D'Sa
发明人： Robert Franklin Krick , Chan Woo Lee , Reynold Viriato D'Sa
IPC分类号： G06F9/38
CPC分类号： G06F9/3806 , G06F9/3802 , G06F9/3808 , G06F9/3848
摘要： A trace branch prediction unit includes a trace branch target buffer connected to a trace cache. The trace cache stores traces of micro-ops, with the micro-ops being stored non-sequentially. The trace branch target buffer generally reads a buffer entry corresponding to a particular trace line one clock cycle before the trace line is read to a processor. Using the entry, the trace branch target buffer predicts whether the trace cache should follow the existing trace or leave the trace. If the trace branch target buffer predicts that the trace cache should leave a trace, the trace branch target buffer provides a target address for a new trace. The trace branch target buffer also predicts when a trace is ending and provides a target address for the next trace.
摘要翻译：跟踪分支预测单元包括连接到跟踪高速缓存的跟踪分支目标缓冲器。跟踪缓存存储微操作的痕迹，微操作被非顺序存储。跟踪分支目标缓冲区通常在将踪迹线读取到处理器之前一个时钟周期读取与特定跟踪线对应的缓冲器条目。使用条目，跟踪分支目标缓冲区预测跟踪缓存是跟踪现有跟踪还是离开跟踪。如果跟踪分支目标缓冲区预测跟踪缓存应该留下跟踪，则跟踪分支目标缓冲区将为新的跟踪提供目标地址。跟踪分支目标缓冲区还可以预测跟踪结束的时间，并为下一个跟踪提供目标地址。

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