| 摘要 |
A cache memory system includes: a plurality of cache lines, each including a data section for storing data of main memory and a line classification section for storing identification information that indicates whether the data stored in the data section is for instruction processing or for data processing; a cache hit determination section for determining whether or not there is a cache hit by using the identification information stored in each of the cache lines; and a cache update section for updating one of the cache lines that has to be updated, according to result of the determination.
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