MATLAB: HDL Coder Signed Inputs/Outputs

Question

I have a simple funtion to test the HDL Coder.

It is as follows:

function [sumnumn, diffnum, prodnum, quotnum] = asmd2num(a, b)

sumnum = a + b;

diffnum = a – b;

prodnum = a * b;

quotnum = a / b;

end

For the Clocks & Ports tab I have Synchronous,

Inpud data type = signed/unsigned

Output data type = signed/unsigned

Optimzations: Register Outputs

The issue is that the HDL output is always producing unsigned outputs.

How does one get SIGNED outputs?

And preferably SIGNED inputs?

Thanks

Answer 1

It appears the whether one gets signed or unsigned is determined by the values in the test bench.