1. A multithreaded microprocessor comprising: a microprocessor having a plurality of cores for supporting a plurality of threads for supporting transactional memory operations, a storage element for storing an address history table (AHT) having entries for a storage access written in said AHT by load store units of said microprocessor, a plurality of interfaces for command and control and a general purpose register coupled to an interface for copying and moving entries in said AHT.