| /* |
| * 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.will need a Picture Elements Binary Software |
| * License. |
| * |
| * 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 demonstrates the mixing of reg and memories in l-value |
| * contatenations. |
| */ |
| module main; |
| |
| reg [3:0] mem [2:0]; |
| reg a, b; |
| |
| initial begin |
| mem[0] = 0; |
| mem[1] = 0; |
| mem[2] = 0; |
| |
| {b, mem[1], a} <= 6'b0_0000_1; |
| #1 |
| if (a !== 1'b1) begin |
| $display("FAILED -- a = %b", a); |
| $finish; |
| end |
| if (mem[1] !== 4'b0000) begin |
| $display("FAILED -- mem[1] = %b", mem[1]); |
| $finish; |
| end |
| if (b !== 1'b0) begin |
| $display("FAILED -- b = %b", b); |
| $finish; |
| end |
| |
| {b, mem[1], a} <= 6'b0_1111_0; |
| #1 |
| if (a !== 1'b0) begin |
| $display("FAILED -- a = %b", a); |
| $finish; |
| end |
| if (mem[0] !== 4'b0000) begin |
| $display("FAILED -- mem[0] - %b", mem[0]); |
| $finish; |
| end |
| if (mem[1] !== 4'b1111) begin |
| $display("FAILED -- mem[1] = %b", mem[1]); |
| $finish; |
| end |
| if (b !== 1'b0) begin |
| $display("FAILED -- b = %b", b); |
| $finish; |
| end |
| |
| $display("PASSED"); |
| end // initial begin |
| |
| endmodule // main |