Equipping the SIMD MAC Operations into embedded RISC Processors

Abstract

Because of the variety and popularity of IA products, the techniques of SOC that satisfy the restrictions of small-size, low-power consumption, and cost effective design have became the main concern for microprocessor design. However, we observed that some services that are performed by massive computation like data encryption, video presentation have merged into the use of low-end IA devices. Thus the research decide to modified a simple embedded processor to satisfy the demands of the dedicated applications by equipping the processor with some important hardware features. The paper targets the applications of multimedia for investigation. By observing the program behavior of multimedia applications, some important operations be executed frequently in these programs are introduced. According to the analysis results, the paper attempt to enhance the execution of MAC operations in a loop by the technique of SIMD to promote the performance. The parallel SIMD MAC instruction, named PMLAV, can speedup the execution of multimedia applications efficiently with a minor hardware overhead. By simulating the execution of multimedia applications to verify the efficiency of the added instruction. We have proved that the addition is a cost effective design for embedded processors.