Compare results between VHDL an MATLAB.

Use modelsim to simulate the hardware, feed it with inputs that vary from 0 to 360 in 0,1 degree steps, output the values of sin and cos to 2 .txt files (use vhdl.text_io package)

In Matlab do this:

in=[0:0,1:360];

mcos=cos(in);

msin=sin(in);

Then read the two vhdl produced text files in Matlab

something like:

vsin=read_txt_file('your_hdl_sinfile.txt');

vcos=read_txt_file('your_hdl_cosfile.txt');

and compare then with the two arrays mcos and msin

plot(msin-vsin);

plot(mcos-vcos);