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...
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| creator | VENKATARAMANAN GANESH TALPES EMIL |
| description | 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. |
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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.</description><language>eng</language><subject>CALCULATING ; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION ANDCOMMUNICATION TECHNOLOGIES [ICT], I.E. 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| subjects | 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 |
| title | METHOD AND APPARATUS FOR PROVIDING EARLY BYPASS DETECTION TO REDUCE POWER CONSUMPTION WHILE READING REGISTER FILES OF A PROCESSOR |
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