/* * Copyright (c) 2001 Stephen Williams (steve@icarus.com) * * This source code is free software; you can redistribute it * and/or modify it in source code form under the terms of the GNU * General Public License as published by the Free Software * Foundation; either version 2 of the License, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ /* * Bit select of a net (a wire) using the index of a for loop. */ module main; // Make a vector of bits, an array of functors in practice, and // create a net that hooks to that array backwards. reg [5:1] vect = 5'b10100; wire [5:1] tmp = { vect[1], vect[2], vect[3], vect[4], vect[5] }; reg [2:0] idx; initial begin #1 $display("vect=%b, tmp=%b", vect, tmp); for (idx = 1 ; idx <= 5 ; idx = idx + 1) begin $display("idx=%d: vect=%b, tmp=%b", idx, vect[idx], tmp[idx]); if (tmp[idx] !== vect[6-idx]) begin $display("FAILED"); $finish; end end $display("PASSED"); end endmodule // main