MULTI-MODE SET ASSOCIATIVE CACHE MEMORY DYNAMICALLY CONFIGURABLE TO SELECTIVELY SELECT ONE OR A PLURALITY OF ITS SETS DEPENDING UPON THE MODE

摘要

The cache memory stores an array of 2 ^ N sets, the tags MA [(Q-1) :( QX)] and the index MA [(QX-1 ): / RTI : J]. Q is an integer at least (N + J + X-1). In the first mode: the set selection logic selects one set using the index and the LSB of the tag; The comparison logic compares all but the LSB of the tag to all but the LSB of each tag in the selected set and if there is a match it represents a hit; Otherwise, assignment logic is assigned to the selected set. In the second mode: the set selection logic selects two sets using the index; The comparison logic compares the tag with each tag in the two selected sets, and if there is a match, it represents a hit; Otherwise, it is assigned to one of the two selected sets.