Design of a 80 Bits Extended Double Precision Floating-Point Trigonometric Computing Unit

The trigonometric algorithm is hard to achieve.By improving the CORDIC algorithm achieved a 80-precision floating-point trigonometric calculation which compatibled with the INTEL processor and SPARC processor.In the design,the calculation range has been extended to-π~+π,and the number of the iterations can be configured.Finally,the correctness and completeness of the algorithm are verified,and the relationship between the number of iterations and the accuracy was analyzed.The results showed that the precision was raised up to 10⁻¹⁴,the simplicity and speed of the algorithm were also great advantages.