Methods and apparatus for improving fetching and dispatch of instructions in multithreaded processors
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United States of America Patent
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Apr 25, 2006
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app pub date -
Jul 14, 2000
filing date -
Dec 16, 1998
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Abstract
In a multi-streaming processor, a system for fetching instructions from individual ones of multiple streams to an instruction pipeline is provided, comprising a fetch algorithm for selecting from which stream to fetch an instruction, and one or more predictors for forecasting whether a load instruction will hit or miss the cache or a branch will be taken. The prediction or predictions are used by the fetch algorithm in determining from which stream to fetch. In some cases probabilities are determined and also used in decisions, and predictors may be used at either or both of fetch and dispatch stages.
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