关键词: 低功耗, 编译优化, 总线编码, 指令调度

Abstract: The information industry’s energy consumption is increasing with the improvement of the information technology. Especially higher chip integration, more complex system applications make power consumption problem become a key issue. Pure hardware power optimization can no longer meet the further improvement of the power optimization requirements, thus software-based power optimization has achieved good results. This paper reduces the power of the system by reducing the number of bus flip during the compilation process. For instruction address bus, it allocates the function segment by using genetic algorithm. And then it uses T0 code to reduce the number of bus clip. For data bus, it uses the ant colony optimization to schedule the instructions and uses 0-1 invert code to reduce the number of the bus clip. It designs and implements the low power optimization algorithms for data bus and address bus, and verifies the algorithm by experiences and it can reduce about 25% of the bus power.

Key words: low power, compiler optimization, bus coding, instruction schedule