Associative cache memory with replacement way info

专利名称：Associative cache memory with replacement

way information integrated into directory

发明人：Darius D. Gaskins,James Hardage申请号：US10046056申请日：20020114

公开号：US20030159003A1公开日：20030821

专利附图：

摘要：An associative cache memory having an integrated tag and LRU array storingpseudo-LRU information on a per way basis, obviating the need for a separate LRU arraystoring pseudo-LRU information on a per row basis. Each way of the integrated array

stores decoded bits of pseudo-LRU information along with a tag. An encoder reads thedecoded bits from all the ways of the selected row and encodes the decoded bits intostandard pseudo-LRU form. The control logic selects a replacement way based on theencoded pseudo-LRU bits. The control logic then generates new decoded pseudo-LRUbits and updates only the replacement way of the selected row with the new decodedpseudo-LRU bits. Thus, the control logic individually updates only the decoded bits of thereplacement way concurrent with the tag of the replacement way, without requiringupdate of the decoded bits in the non-replacement ways of the row.

申请人：IP-FIRST, LLC

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