METHOD AND APPARATUS FOR ADDING USER-DEFINED EXECUTION UNITS TO A PROCESSOR USING CONFIGURABLE LONG INSTRUCTION WORD (CLIW)

摘要

The present invention is a system in which a multiplicity of diverse dedicated hardware off-core execution units [fig. 2, units 1-n] are connected to a core processor [fig. 2, unit 50] in order to increase the speed, power, and flexibility of the processor, and a method of operating the system. Reference instructions executed by the core processor initiate the execution of Configurable Long Instruction Word (CLIW) instructions stored in a CLIW memory [fig. 2, unit 18]. The operation of the off-core execution units is controlled by CLIW instructions. These CLIW instructions may also control operations performed by the core processor exclusively. The off-core logic units are operationally connected to the data memory of the core processor under the control of the core processor's data address logic. The use of CLIW technology for the control of the off-core hardware logic units allows the addition of a plurality of diverse off-core logic units without affecting the instruction set, coding space, or instruction decoders of the core processor.