Methods and apparatus for attaching application specific functions within an array processor

A multi-node video signal processor (VSPN) is describes that tightly couples multiple multi-cycle state machines (hardware assist units) to each processor and each memory in each node of an N node scalable array processor. VSPN memory hardware assist instructions are used to initiate multi-cycle state machine functions, to pass parameters to the multi-cycle state machines, to fetch operands from a node's memory, and to control the transfer of results from the multi-cycle state machines.