Subversion Repositories present_encryptor

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// Design Name: Permutation Layer for Present Cipher              //
// Module Name: permutation                                       //
// Language:    Verilog                                           //
// Date Created: 1/16/2011                                        //
// Author: Reza Ameli                                             //
//         Digital Systems Lab                                    //
//         Ferdowsi University of Mashhad, Iran                   //
//         http://commeng.um.ac.ir/dslab                          //
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//                                                                //
// 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.                                                       //
//                                                                //
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module permutation(data_o,data_i);
 
//- Module IOs ----------------------------------------------------------------
 
output wire[63:0] data_o;
input  wire[63:0] data_i;
 
//- Continuous Assigments------------------------------------------------------
 
assign data_o[0 ] = data_i[0 ];
assign data_o[16] = data_i[1 ];
assign data_o[32] = data_i[2 ];
assign data_o[48] = data_i[3 ];
assign data_o[1 ] = data_i[4 ];
assign data_o[17] = data_i[5 ];
assign data_o[33] = data_i[6 ];
assign data_o[49] = data_i[7 ];
assign data_o[2 ] = data_i[8 ];
assign data_o[18] = data_i[9 ];
assign data_o[34] = data_i[10];
assign data_o[50] = data_i[11];
assign data_o[3 ] = data_i[12];
assign data_o[19] = data_i[13];
assign data_o[35] = data_i[14];
assign data_o[51] = data_i[15];
 
assign data_o[4 ] = data_i[16];
assign data_o[20] = data_i[17];
assign data_o[36] = data_i[18];
assign data_o[52] = data_i[19];
assign data_o[5 ] = data_i[20];
assign data_o[21] = data_i[21];
assign data_o[37] = data_i[22];
assign data_o[53] = data_i[23];
assign data_o[6 ] = data_i[24];
assign data_o[22] = data_i[25];
assign data_o[38] = data_i[26];
assign data_o[54] = data_i[27];
assign data_o[7 ] = data_i[28];
assign data_o[23] = data_i[29];
assign data_o[39] = data_i[30];
assign data_o[55] = data_i[31];
 
assign data_o[8 ] = data_i[32];
assign data_o[24] = data_i[33];
assign data_o[40] = data_i[34];
assign data_o[56] = data_i[35];
assign data_o[9 ] = data_i[36];
assign data_o[25] = data_i[37];
assign data_o[41] = data_i[38];
assign data_o[57] = data_i[39];
assign data_o[10] = data_i[40];
assign data_o[26] = data_i[41];
assign data_o[42] = data_i[42];
assign data_o[58] = data_i[43];
assign data_o[11] = data_i[44];
assign data_o[27] = data_i[45];
assign data_o[43] = data_i[46];
assign data_o[59] = data_i[47];
 
assign data_o[12] = data_i[48];
assign data_o[28] = data_i[49];
assign data_o[44] = data_i[50];
assign data_o[60] = data_i[51];
assign data_o[13] = data_i[52];
assign data_o[29] = data_i[53];
assign data_o[45] = data_i[54];
assign data_o[61] = data_i[55];
assign data_o[14] = data_i[56];
assign data_o[30] = data_i[57];
assign data_o[46] = data_i[58];
assign data_o[62] = data_i[59];
assign data_o[15] = data_i[60];
assign data_o[31] = data_i[61];
assign data_o[47] = data_i[62];
assign data_o[63] = data_i[63];
 
//-----------------------------------------------------------------------------
endmodule