The stream processors are applied widely in high performance computing. But the existing computation speed of stream processors can' t satisfy people' s needs. Through study, the bandwidth in accessing memory is the reason limiting the computation speed of stream processors. So how to reduce the times of accessing memory becomes the key to improve the computation speed of stream processors. This paper constructs the transcendental function unit by using the Cordic algorithm, reduces the times of accessing memory, and improves the computation speed of stream processors.%流处理器在科研、国防和生活中有着广泛的应用,但随着人类对计算速度的不断追求,现有的流处理器计算速度已不能满足人们的需求,经研究发现,影响流处理器处理数据速度的是访存的时间,所以减少访存次数是提高流处理器计算速度的关键.通过引入Cordic算法,构建超越函数单元,减少了流处理器在处理流应用中的访存次数,从而提高流处理器的计算速度.
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