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////////////////////////////////////////////////////////////////////// //// //// //// Generic 32x32 multiplier //// //// //// //// This file is part of the OpenRISC 1200 project //// //// http://www.opencores.org/cores/or1k/ //// //// //// //// Description //// //// Generic 32x32 multiplier with pipeline stages. //// //// //// //// To Do: //// //// - make it smaller and faster //// //// //// //// Author(s): //// //// - Damjan Lampret, lampret@opencores.org //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 Authors and OPENCORES.ORG //// //// //// //// This source file may be used and distributed without //// //// restriction provided that this copyright statement is not //// //// removed from the file and that any derivative work contains //// //// the original copyright notice and the associated disclaimer. //// //// //// //// This source file is free software; you can redistribute it //// //// and/or modify it under the terms of the GNU Lesser General //// //// Public License as published by the Free Software Foundation; //// //// either version 2.1 of the License, or (at your option) any //// //// later version. //// //// //// //// This source 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 Lesser General Public License for more //// //// details. //// //// //// //// You should have received a copy of the GNU Lesser General //// //// Public License along with this source; if not, download it //// //// from http://www.opencores.org/lgpl.shtml //// //// //// ////////////////////////////////////////////////////////////////////// // // CVS Revision History // // $Log: not supported by cvs2svn $ // Revision 1.1.1.1 2001/10/06 10:18:36 igorm // no message // // Revision 1.2 2001/08/09 13:39:33 lampret // Major clean-up. // // Revision 1.1 2001/07/20 00:46:03 lampret // Development version of RTL. Libraries are missing. // // `include "timescale.v" `include "defines.v" // 32x32 multiplier, no input/output registers // Registers inside Wallace trees every 8 full adder levels, // with first pipeline after level 4 `define W 32 `define WW 64 module multp2_32x32 ( X, Y, CLK, RST, P ); input [`W-1:0] X; input [`W-1:0] Y; input CLK; input RST; output [`WW-1:0] P; reg [`WW-1:0] p0; reg [`WW-1:0] p1; always @(posedge CLK or posedge RST) if (RST) p0 <= `WW'b0; else p0 <= #1 X * Y; always @(posedge CLK or posedge RST) if (RST) p1 <= `WW'b0; else p1 <= #1 p0; assign P = p1; endmodule