The implementation of high-precision floating transcendental functions on FPGA based on the CORDIC algorithm

This paper presents a novel architecture of input and output floating-point execution unit,which can converts data from the format of CORDIC algorithm system to the format accepted by processors.Two different units of angle can be directly supported by the floating-point CORDIC module,the wide angle even above 360° also can be directly supported by the hardware module. Finally,we accomplish the hardware module by adding custom instruction on the Nios Ⅱ processor system of Altera corpora- tion.The floating-point CORDIC module's correctness is proved by C program running in the Nios II processor.