Predictive historical cache memory
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United States of America Patent
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Feb 8, 1994
Grant Date -
N/A
app pub date -
Nov 29, 1990
filing date -
Dec 11, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
A cache memory functioning as a circular buffer for use as a part historical, part predictive cache memory is provided. A first register contains data having a value corresponding to a cache memory location of a last instruction executed by a processor and a second register contains data having a value corresponding to a memory location in the cache memory of a last prefetched instruction. Prefetching of instructions from a main memory to the cache memory is disabled if the difference between the values in the first and second pointer registers exceeds a predetermined amount.
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