Abstract: 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.

Key words: Cordic algorithm, stream processor, memory accessing times, FFT