A bytecode accelerator which translates stack-based intermediate language (bytecodes) into register-based CPU instructions transfers plural pieces of internal information from a register file of a CPU to the bytecode accelerator by means of an internal transfer bus between the bytecode accelerator and...http://www.google.com/patents/US7853776?utm_source=gb-gplus-sharePatent US7853776 - Handover between software and hardware accelerator
