METHOD AND APPARATUS FOR PROVIDING EARLY BYPASS DETECTION TO REDUCE POWER CONSUMPTION WHILE READING REGISTER FILES OF A PROCESSOR

METHOD AND APPARATUS FOR PROVIDING EARLY BYPASS DETECTION TO REDUCE POWER CONSUMPTION WHILE READING REGISTER FILES OF A PROCESSOR

A method and apparatus are described for reducing power consumption in a processor. A micro-operation is selected for execution, and a destination physical register tag of the selected micro-operation is compared to a plurality of source physical register tags of micro-operations dependent upon the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: VENKATARAMANAN GANESH, TALPES EMIL
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION ANDCOMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION ANDCOMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWNENERGY USE
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
PHYSICS
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:A method and apparatus are described for reducing power consumption in a processor. A micro-operation is selected for execution, and a destination physical register tag of the selected micro-operation is compared to a plurality of source physical register tags of micro-operations dependent upon the selected micro-operation. If there is a match between the destination physical register tag and one of the source physical register tags, a corresponding physical register file (PRF) read operation is disabled. The comparison may be performed by a wakeup content-addressable memory (CAM) of a scheduler. The wakeup CAM may send a read control signal to the PRF to disable the read operation. Disabling the corresponding PRF read operation may include shutting off power in the PRF and related logic.