POWER SAVING METHODS AND APPARATUS TO SELECTIVELY

专利名称：POWER SAVING METHODS AND

APPARATUS TO SELECTIVELY ENABLECOMPARATORS IN A CAM RENAMINGREGISTER FILE BASED ON KNOWNPROCESSOR STATE

发明人：BRIDGES, Jeffrey Todd,DIEFFENDERFER,

James Norris,MCILVAINE, MichaelScott,SARTORIUS, Thomas Andrew

申请号：EP06736860.5申请日：20060303公开号：EP1861765B1公开日：20190522

摘要：A renaming register file complex for saving power is described. A mapping unittransforms an instruction register number (IRN) to a logical register number (LRN). Therenaming register file maps an LRN to a physical register number (PRN), there being agreater number of physical registers than addressable by direct use of the IRN. Therenaming register file uses a content addressable memory (CAM) to provide the mappingfunction. The renaming register file CAM further uses current processor stateinformation to selectively enable tag comparators to minimize power in accessingregisters. When a tag comparator is not enabled it remains in a low power state. Aprocessor using a renaming register file with low power features is also described.

申请人：QUALCOMM INC

地址：US

国籍：US

代理机构：Heselberger, Johannes

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