[Iverilog-devel] iverilog functions

[Dan M. <dan...@gm...>]

I am using iverilog to learn SystemVerilog. I am following along in a
digital system design book and am having trouble building one of the
examples. The code uses a function to calculate log2:

module #(parameter AL = 8, BL = 8, QL = AL + BL) ...

    logic[clog2(AL):0] count;
    ...
    function clog2(input int n);
        begin
            clog2 = 0;
            n--;
            while(n > 0)
                begin
                    clog2++;
                    n >>= 1;
                end
         end
    endfunction
endmodule

I calling iverilog like this:

iverilog -g2012 -Wall -o booth booth.sv

It seems to get hung processing the loop or detecting n == 0 or
something. Is there an easy way
to debug this? I was thinking I'd run iverilog within gdb but maybe
there is a faster way to determine what is happening?

Regards,

Dan McLeran