USING LOOP EXIT PREDICTION TO ACCELERATE OR SUPPRESS LOOP MODE OF A PROCESSOR

A processor predicts a number of loop iterations associated with a set of loop instructions. In response to the predicted number of loop iterations exceeding a first loop iteration threshold, the set of loop instructions are executed in a loop mode that includes placing at least one component of an...

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Bibliographische Detailangaben
Hauptverfasser: THYAGARAJAN, Aparna, ANNAMALAI, Arunachalam, JARVIS, Anthony, EVERS, Marius
Format: Patent
Sprache:eng
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Zusammenfassung:A processor predicts a number of loop iterations associated with a set of loop instructions. In response to the predicted number of loop iterations exceeding a first loop iteration threshold, the set of loop instructions are executed in a loop mode that includes placing at least one component of an instruction pipeline of the processor in a low-power mode or state and executing the set of loop instructions from a loop buffer. In response to the predicted number of loop iterations being less than or equal to a second loop iteration threshold, the set of instructions are executed in a non-loop mode that includes maintaining at least one component of the instruction pipeline in a powered up state and executing the set of loop instructions from an instruction fetch unit of the instruction pipeline.