关键词: 计算机系统结构，可重构指令集处理器，指令扩展，动态采样剖析

Abstract: Reconfigurable instruction set processor (RISP) can dynamically extend its instruction set based on specific applications characteristics. The design of its hardware architecture and software tools is very different from the traditional design ideas. Based on the research for the features of RISP, a RISP integrating dynamic sampling profiler (DSP-RISP) was proposed. DSP-RISP has three kinds of working modes, obtaines the hot spots of applications through a hardware profiler with sampling mechanisms and then with the software tool chain semi-automatically completes the work such as instruction extension and generating, compiler retargeting and programmable hardware logic configuration to achieve the hardware adaptability and software compatibility for various embedded applications. Experimental results show that the sampling profiler of DSP-RISP is accurate and effective and under the limited hardware overhead, DSP-RISP can well adapt to application changes.

Key words: Computer architecture, Reconfigurable instruction set processor, Instruction extended, Dynamic sampling profiling