verilator/test_regress/t/t_param_const_part.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2015 Wilson Snyder
// SPDX-License-Identifier: CC0-1.0

module t;
  function integer bottom_4bits;
    input [7:0] i;
    bottom_4bits = 0;
    bottom_4bits[3:0] = i[3:0];
  endfunction

  function integer bottom_2_unknown;
    input [7:0] i;
    // bottom_4bits = 0;  'x
    bottom_2_unknown[1:0] = i[1:0];
  endfunction

  localparam P = bottom_4bits(8'h13);
  localparam BU = bottom_2_unknown(8'h13);

  initial begin
    if (P != 3) $stop;
    $write("*-* All Finished *-*\n");
    $finish;
  end
endmodule