1. A reconfigurable integrated circuit device which converts an arbitrary calculation state dynamically, based on configuration data, comprising: a plurality of processor elements, each of which comprises an input terminal, an output terminal, a plurality of arithmetic units which are provided in parallel and each of which performs calculation processing in synchronous with a clock signal, and an intra-processor network which connects together said input terminal, said output terminal, and input and output ports of said plurality of arithmetic units in an arbitrary state; and an inter-processor network which connects between said plurality of processor elements in an arbitrary state, wherein: said intra-processor network is reconfigurable to a desired connection state based on configuration data, and further, said inter-processor network is reconfigurable to a desired connection state based on said configuration data.