System and method for error correction code generation

摘要

Error correction code ("CECC") generation within a directory or memory controller is distributed between generation of an ECC for the tag and status portions of a directory entry and then summed to produce the ECC bits for the directory entry. The ECC generation may be performed for entries with respect to a cache for a uniprocessor or multiprocessor system or for system memory within such a data processing system. The ECC generation of the present invention reduces by one or more cycles the required time utilized for updating a directory entry.