/* * Copyright (c) 2000 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 */ /* * This program tests that a non-integer delay, in the absence of any * timescale values, will round properly. A 2.4 delay rounds to 2, and * a 2.6 delay rounds to 3. */ module main; reg clk; reg out1, out2; time time1; time time2; always @(posedge clk) #2.4 begin $display($time,, "set out1 == 1"); time1 = $time; out1 = 1; end always @(posedge clk) #2.6 begin $display($time,, "set out2 == 1"); time2 = $time; out2 = 1; end initial begin clk = 0; out1 = 0; out2 = 0; time1 = 0; time2 = 0; #1 if (out1 !== 0) begin $display("FAILED -- out1 is not 0: %b", out1); $finish; end clk = 1; #3 if (out1 !== 1) begin $display("FAILED -- out is not 1 at time 3: %b", out1); $finish; end if (time1 != 3) begin $display("FAILED -- time1 = %d", time1); $finish; end #1 if (time2 != 4) begin $display("FAILED -- time2 = %d", time2); $finish; end $display("PASSED"); end // initial begin endmodule // main