一种面向多媒体和通信应用的处理器指令集及架构实现

提出了一种面向多媒体和通信应用的CPU和DSP一体化计算的指令集架构,并设计实现了一款基于该指令集架构的VLIW DSP处理器.该CPU和DSP融合指令集架构中的CPU指令兼容已有MIPS 4KC指令集,DSP指令为自主设计.针对多媒体和通信常用算法中并行度高等特点,提出了多条基于像素操作、向量操作和复数操作的DSP指令,并详细说明了实现这些指令的关键功能模块的电路实现方法.实验结果表明,在多媒体的插值、重建以及通信的滤波、FFT等算法上,采用本文提出的面对特定应用的指令集具有较明显的优势.流片测试结果证明该指令集架构可实现且有效.

Architecture and Implementation of An Application Specific Instruction Set for Multimedia and Communication

An application specific instruction set for multimedia and communication was introduced. A unified DSP plus general-purpose CPU processor based on this instruction set was designed and implemented. The CPU instruction set was compatible with the MIPS 4KC instruction set and the DSP instruction set was designed independently by analyzing the characteristic of the application. This paper presented the instructions and their operation logic in detail. The proposed instructions are suitable for 'pixel', 'vector' and 'complex' operations according to the high parallelism of the application. The test results have shown that the instruction set presented has obvious advantage in some multimedia and communication arithmetic, such as image interpolation, reconstruction and filter and FFT. The chip test result has shown that this architecture is feasible.