jellyfish-powersupply/gw/test/multiplier_tb.sv

`timescale 1ns/1ps

// SPDX-FileCopyrightText: 2025 Igor Brkic <igor@hyperglitch.com>
// SPDX-License-Identifier: GPL-3.0-or-later

//TB_DEPS: src/multiplier.v

module multiplier_tb;

  reg i_clk;
  reg i_rst;
  reg i_start;
  reg signed [15:0] i_a;
  reg signed [15:0] i_b;
  wire signed [31:0] o_result;
  wire o_ready;

  multiplier16 multiplier (
    .clk(i_clk),
    .rst(i_rst),
    .start(i_start),
    .a(i_a),
    .b(i_b),
    .result(o_result),
    .ready(o_ready)
  );

  // generate a clock
  initial begin
    i_clk = 0;
    forever #5 i_clk = ~i_clk; // 10ns clock period, 100MHz
  end

  initial begin
    i_rst = 1;
    i_start = 0;
    i_a = 0;
    i_b = 0;
    #10;
    i_rst = 0;
    #10;
    i_start = 1;
    i_a = 25;
    i_b = -18;
    #10;
    i_start = 0;

    #200;
    i_start = 1;
    i_a = -138;
    i_b = 254;
    #10;
    i_start = 0;
    #200;

    $finish;
  end

  initial begin
    $dumpfile("build/multiplier_tb.vcd");
    $dumpvars(0, multiplier_tb);
  end

endmodule