verilator/test_regress/t/t_param_func.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This test examines Verilator against paramter definition with functions.
// Particularly the function takes in argument which is multi-dimentional.
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2015 Roland Kruse and Jie Xu
// SPDX-License-Identifier: CC0-1.0

module test #(
    parameter SIZE = 4,
    parameter P = sum({32'h1, 32'h2, 32'h3, 32'h4}, SIZE)
) (
    input clk,
    input logic sel,
    output [P:0] res
);

  logic [P:0] cc = 'h45;

  assign res = sel ? cc : {(P + 1) {1'b1}};

  function integer sum;
    input [3:0][31:0] values;
    input int size;

    sum = 0;

    begin
      for (int i = 0; i < size; i++) sum += values[i];
    end
  endfunction

endmodule