Floating Point with Fixed Point FPGA

[Altera_Forum]

Good day. 

 I know this has been discussed a lot, but each situation seems different.   I want to implement trigonometry functions on a Fixed Point FPGA.    Can you please assist me with some tips as to how to go about this.   I figured a lookup table may work.   Does anybody have any tips or examples.    Kind regards

[Altera_Forum]

Look up tables are the way to go if you have few input/output bit. 

In case 8 bit input and 8 bit input you get 256 byte of memory that is more than reasonable.  With 16/16 you get 128Kb of memory, that starts to be difficult in a low cost FPGA.

[Altera_Forum]

If processing time isn't an issue, CORDIC may be an alternative for high resolution trigonometric functions. Or, even more simple, but slower, power series, the classical method used by numeric co-processors and software float libraries.

[Altera_Forum]

Thank you very much. 

 I have'nt worked wih CORDIC, but quick research shows this to be promising. I will research a bit and try an implementation.   Your help is appreciated