Panasonic Corporation

Tomohiro Hirata

Kiyoshi Owada

Seimizu Joukan

The cache memory systemcomprises: a virtual index obtaining unitoperable to obtain, based on a virtual address, virtual indexes of an access-target cache line and a cache line potentially having a cache-aliasing relationship with the access-target cache line; a physical tag obtaining unitoperable to obtain a physical tag of a physical page by performing address translation on the virtual address; and a comparing unitoperable to compare a physical tag TAG obtained by the physical tag obtaining unitwith each tag information piece TAG(i) belonging to cache lines corresponding to the virtual indexes and output from the tag arraybased on the virtual indexes obtained by the virtual index obtaining unit, and determines a cache hit/miss.

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Osaka, Japan

Tomohiro Hirata