how to code tan, arctan, log functions in verilog?

[Altera_Forum]

I need to use tan and arctan functions in verilog and generate a plot, one like in matlab. 

 Also , the code should be synthesizable.  Can any one suggest how can I code such trigonometric functions in verilog?  Awaiting help. Thanks, Susmitha

[Altera_Forum]

You should use the Cordic IP core in order to generate complex mathematical functions. 

Try to instantiate and simulate the cordic core and configure it such a way that your math functions are generated.

[Altera_Forum]

Or just precompute the values you need to some resolution, and store them in a ROM lookup table using block RAM. 

It all depends on what data format and resolution of computation you need (ie, 16b integer vs 32b floating point require dramatically different logic).

[Altera_Forum]

Thank you so much for the suggestions.