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中文摘要：
现代高性能通用处理器的设计越来越复杂，模拟器在处理器设计中所起的作用越来越大．龙芯2号是中国科学院计算技术研究所研制的高性能通用处理器．最早开发的龙芯2号的模拟器ICT—Godson是信号级模拟器，它模拟了处理器的所有细节，十分准确，但速度和灵活性有较大限制．文章基于Simple Scalar工具集，设计并实现了龙芯2号的模拟器Sim—Godson．Sim—Godson具有高速度和高灵活性的优点，且准确性也很高．在3．OGHz的Pentium4微机上，Sim—Godson速度约为500K指令／s．大部份测试程序在Sim—Godson上的IPC（Instruction Per Cycle）与ICT—Godson相差不到5％，达到了很高的准确性．Sim—Godson在龙芯2号的性能分析工作中发挥了重要作用．
英文摘要：
As the increase in complexity of modern processor design, simulator is becoming more and more important in processor design. Godson-2 is a high performance general purpose processor developed by the Institute of Computing Technology, Chinese Academy of Sciences. ICTGodson, the initial simulator of Godson-2, is a signal level simulator, which simulates all hardware details of Godson-2 and is very accurate. But the speed of ICT-Godson is not high enough and the flexibility is not good. Based on SimpleScalar tool sets, Sire-Godson, one processor sireulator of Godson-2, is son has high speed and designed and implemented. Comparing with the ICT-Godson, Sire-Godhigh flexibility and the accuracy is also very good. On PC of Pentium4 3.0GHz, the speed of Sim-Godson is about 500K instructions per second. IPC（Instruction Per Cycle） difference between Sim-Godson and ICT-Godson is less than 5 percent for the most applications. Sim-Godson plays an important role in the performance analysis of God-son-2.
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