可重构媒体处理器任务编译器的前端设计

Front-End Design of Task Compiler for Reconfigurable Multimedia Processor

为了解决算法程序自动映射到可重构媒体处理器的问题,有效提高程序并行执行的效率,提出一种具有自动并行化的任务编译前端.该任务编译前端通过展开核心循环可提高并行执行度,在数据依赖分析确保运算正确执行的基础上,对循环体内的数组访问进行标量替换,以优化数据传输开销.实验结果表明,该任务编译前端能有效提高代码并行性和优化数据传输能力,与Garp C编译器的编译前端相比,该任务编译前端设计的性能可提升约2～4倍.

In order to automatically map algorithms onto reconfigurable multimedia processor and improve the parallel efficiency of algorithms, a task compiler front-end is designed. The kernel loop unrolling is introduced to improve the degree of parallelism; and the scalar replacement technique based on data dependence analysis is used to optimize the cost of data transmission. Experiments show that the task compiler front-end improves the degree of parallelism effectively, its performance can be, compared with the front-end of Garp C compiler, sharply increased up to 2 -4 times in the whole system.