Invention Grant
US08909907B2 Reducing branch prediction latency using a branch target buffer with a most recently used column prediction 有权
使用最近使用的列预测的分支目标缓冲区减少分支预测等待时间

Reducing branch prediction latency using a branch target buffer with a most recently used column prediction
Abstract:
Exemplary embodiments include a system and method for reducing branch prediction latency using a branch target buffer with most recently used column prediction. An exemplary embodiment includes a method for reducing branch prediction latency, the method including reading most-recently-used information from a most-recently-used table associated with the branch target buffer where each most-recently-used entry corresponds to one or more branch target buffer rows and specifies the ordering from least-recently-used to most-recently-used of the associated branch target buffer columns, selecting a row from the branch target buffer and simultaneously selecting the associated entry from the most-recently-used table and speculating that there is a prediction in the most recently used column of the plurality of columns from the selected row from the branch target buffer while determining whether there is a prediction and which column contains the prediction.
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