| /* |
| * Copyright (c) 2001 Philip Blundell |
| * |
| * 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 |
| */ |
| primitive p (Q, D); |
| input D; |
| output Q; |
| reg Q; |
| initial Q = 1'b0; |
| table |
| 0 : ? : 0; |
| 1 : ? : 1; |
| endtable |
| endprimitive |
| |
| module m; |
| |
| reg D; |
| wire Q; |
| reg A; |
| wire QQ; |
| |
| p(Q, D); |
| buf(QQ, Q); |
| |
| initial |
| begin |
| // The #1 is needed here to allow the initial values to |
| // settle. Without it, there is a time-0 race. |
| #1 $display(QQ, Q); |
| #10 |
| D = 0; |
| #15 |
| $display(QQ, Q); |
| #20 |
| D = 1; |
| #25 |
| $display(QQ, Q); |
| $finish; |
| end |
| endmodule |
