8051的内核代码(verilog语言)

源代码在线查看: oc8051_multiply.v

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关键词: verilog 8051 内核 代码
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				//////////////////////////////////////////////////////////////////////
				//// 								  ////
				//// multiply for 8051 Core 				  	  ////
				//// 								  ////
				//// This file is part of the 8051 cores project 		  ////
				//// http://www.opencores.org/cores/8051/ 			  ////
				//// 								  ////
				//// Description 						  ////
				//// Implementation of multipication used in alu.v 		  ////
				//// 								  ////
				//// To Do: 							  ////
				////  Nothing							  ////
				//// 								  ////
				//// Author(s): 						  ////
				//// - Simon Teran, simont@opencores.org 			  ////
				//// 								  ////
				//////////////////////////////////////////////////////////////////////
				//// 								  ////
				//// Copyright (C) 2001 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 			  ////
				//// 								  ////
				//////////////////////////////////////////////////////////////////////
				//
				// ver: 1
				//
				
				
				// synopsys translate_off
				`include "oc8051_timescale.v"
				// synopsys translate_on
				
				
				module oc8051_multiply (src1, src2, des1, des2, desOv);
				input [7:0] src1, src2;
				output desOv;
				output [7:0] des1, des2;
				reg desOv; reg [7:0] des1, des2;
				
				always @(src1 or src2)
				begin
				  {des2, des1} = src1* src2;
				  if (des2!=8'b00000000)
				    desOv = 1'b1;
				  else
				    desOv = 1'b0;
				end
				
				endmodule
							

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