基于执行频率的循环展开优化方法

本文提出一种面向嵌入式低功耗的基于执行频率的循环展开优化方法,根据循环的执行频率,积极展开一些频繁被执行的循环,不展开那些很少被执行的循环。所有这些都在GCC4.0.0上进行了实现,并在sim-panalyzer功耗模拟器上对12个Benchmarks进行了测试,结果表明,相对于传统的循环展开优化,新的优化方法可以有效的降低功耗,并且减少了代码量的增加。

A New Method for Unrolling Loops Based on the Execution Frequency

In this paper,we present a new method of unrolling loops for low power based on the execution frequency of loop,we aggressively unroll the loops which commonly be executed and not unroll the loops which have few chances to be executed.The method was implemented in GCC 4.0.0,and 12 benchmarks were tested on sim-panalyzer power estimation simulator.The results show that new method can effectively reduce power dissipation against traditional loop unrolling.Besides,the new method also reduces the code-expanding.