How to compare variables name

module ex();
     logic        clk;
     logic [ 3:0] btn;
     logic        vaux2_p;
     logic        vaux2_n;
     logic        gpio1;
     logic        gpio2;

  main dut(
    .clk(clk),
    .btn (btn),
    .vaux2_p (vaux2_p),
    .vaux2_n (vaux2_n),
    .pio3 (pio3),
    .pio4 (pio4)
    );

task test;
    input [ 7:0] a;
    input [23:0] v;
    input [23:0] s;
    integer f1;
    integer f2;
      begin
            f1 = Sfopen("file.txt","w");
             if (!f1) begin
               Sdisplay("File \"file.txt\" cannot be opened!");
             end else begin
                  if(s=="dut.f") begin
                        Sfwrite(f1, "1:\n");
                  end else if(s=="dut.f") begin
                        Sfwrite(f1, "2:\n");
                  end
             end
endtask

  initial begin
    test(8'h1a,16'hF0, dut.f);

    Sfinish;
  end
endmodule

ASCII strings would be represented by string type, not bit vectors. There's however no direct access to object names. You may check if vpi_handle_by_name() serves your purposes.

Thanks for your reply, but it seems that vpi_handle_by_name() won't be useful in my case. Anyway I menage to compare the variables name in a different way. Thank you!

many years ago, some compilers/? would list all variables and what line they were on, in a program
it did not take into account subroutines and scope
perhaps your system has that capability

No I don't think my system has that capability, but using strings it has been possible to compare two variable names.

#2 I've noticed vpi handle in the vhdl standard? What is this?

Is this the way the software processes the rtl code.

Can you talk to modelsim/questasim or whatever software using these functions?

VPI is from verilog https://en.wikipedia.org/wiki/Verilo...ural_Interface though apparently it has been partially ported to VHDL as VHPI. I only saw a link for GHDL having support, don't know if any other simulators support it.

Mainstream Verilog/Systemverilog simulators support VPI and it's predecessor PLI, it's a way to access the database that the simulator creates directly with the C programming language.