| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: dffe.v |
| 4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 6 | // |
| 7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 8 | // |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; version 2 of the License. |
| 12 | // |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | // |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | // |
| 22 | // For the avoidance of doubt, and except that if any non-GPL license |
| 23 | // choice is available it will apply instead, Sun elects to use only |
| 24 | // the General Public License version 2 (GPLv2) at this time for any |
| 25 | // software where a choice of GPL license versions is made |
| 26 | // available with the language indicating that GPLv2 or any later version |
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| 34 | // ========== Copyright Header End ============================================ |
| 35 | /*%W% %G%*/ |
| 36 | |
| 37 | /***************************************************************** |
| 38 | * |
| 39 | * File Name : dffe.v |
| 40 | * Author Name : John Lo |
| 41 | * Description : |
| 42 | * |
| 43 | * Parent Module: |
| 44 | * Child Module: |
| 45 | * Interface Mod: many. |
| 46 | * Date Created : 3/25/04 |
| 47 | * |
| 48 | * Copyright (c) 2020, Sun Microsystems, Inc. |
| 49 | * Sun Proprietary and Confidential |
| 50 | * |
| 51 | * Modification : |
| 52 | * |
| 53 | ****************************************************************/ |
| 54 | module dffe (clk,en,d,q ); |
| 55 | |
| 56 | parameter WIDTH = 1; |
| 57 | |
| 58 | input [WIDTH-1:0] d; |
| 59 | input en; |
| 60 | input clk; |
| 61 | output [WIDTH-1:0] q; |
| 62 | |
| 63 | reg [WIDTH-1:0] q; |
| 64 | |
| 65 | always@(posedge clk ) begin |
| 66 | if (en) q[WIDTH-1:0] <= d[WIDTH-1:0] ; |
| 67 | else q[WIDTH-1:0] <= q[WIDTH-1:0] ; |
| 68 | end |
| 69 | |
| 70 | endmodule // dffe |