Intel Corporation

Michael Mroczek

Varghese George

Nazar A Zaidi

Mike Morrison

Umberto Santoni

Only one pipe in superscalar microprocessor contains particular functional logic necessary to process a specific instruction. When the specific instruction appears in an instruction stream, the microprocessor replicates the specific instruction so that there are as many identical instructions in the stream as there are pipes. The identical instructions appear contiguously in the instruction stream. Each identical instruction is processed by a different one of the pipes. The pipe with the particular functional logic performs the necessary operations for the specific instruction while the other pipes treat the instruction as a null operation.

Method and apparatus for efficient pipelining

Methods and apparatus defer correction of an error in a tag entry of a cache tag array. An address of requested data, including an address tag field, can be received by a cache. A first hit indication based at least in part on a comparison of the address tag field and a first tag entry can be generated and result in outputting of a first data entry of a data array. An error in the tag entry can be detected, and the first data entry can be disregard based at least in part on the detected error.

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Granite Bay, CA, United States of America

Michael Mroczek