3. The method of claim 2 , wherein the cache directory comprises no more than two synonym slots for the cache entry, and wherein writing the contents of the first-ranked synonym slot for the cache entry to the second-ranked synonym slot for the cache entry demotes the other synonym from the cache directory.
2. The method of claim 1 , wherein writing the contents of the first-ranked synonym slot for the cache entry to the second-ranked synonym slot for the cache entry demotes an other synonym from the second-ranked synonym slot for the cache entry.