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[/] [sc2v/] [trunk/] [examples/] [subbytes.cpp] - Blame information for rev 36

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Line No. Rev Author Line
1 13 jcastillo 
//////////////////////////////////////////////////////////////////////
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////                                                              ////
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////  AES subbytes module implementation                          ////
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////                                                              ////
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////  This file is part of the SystemC AES                        ////
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////                                                              ////
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////  Description:                                                ////
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////  Subbytes stage implementation for AES algorithm             ////
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////                                                              ////
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////  To Do:                                                      ////
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////   - done                                                     ////
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////                                                              ////
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////  Author(s):                                                  ////
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////      - Javier Castillo, jcastilo@opencores.org               ////
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////                                                              ////
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//////////////////////////////////////////////////////////////////////
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////                                                              ////
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//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
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////                                                              ////
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//// This source file may be used and distributed without         ////
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//// restriction provided that this copyright statement is not    ////
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//// removed from the file and that any derivative work contains  ////
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//// the original copyright notice and the associated disclaimer. ////
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////                                                              ////
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//// This source file is free software; you can redistribute it   ////
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//// and/or modify it under the terms of the GNU Lesser General   ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any   ////
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//// later version.                                               ////
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////                                                              ////
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//// This source is distributed in the hope that it will be       ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
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//// PURPOSE.  See the GNU Lesser General Public License for more ////
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//// details.                                                     ////
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////                                                              ////
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//// You should have received a copy of the GNU Lesser General    ////
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//// Public License along with this source; if not, download it   ////
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//// from http://www.opencores.org/lgpl.shtml                     ////
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////                                                              ////
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//////////////////////////////////////////////////////////////////////
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//
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// CVS Revision History
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//
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// $Log: not supported by cvs2svn $
46 28 jcastillo 
// Revision 1.3  2005/03/16 18:12:25  jcastillo
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//
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// Style modifications
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//
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// Revision 1.1  2005/01/26 16:51:06  jcastillo
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// New examples for 0.2.5 version
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//
53 13 jcastillo 
// Revision 1.2  2004/08/30 14:44:44  jcastillo
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// Code Formater used to give better appearance to SystemC code
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//
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// Revision 1.1.1.1  2004/07/05 09:46:22  jcastillo
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// First import
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//
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#include "subbytes.h"
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void subbytes::sub()
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{
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        sc_biguint<128> data_i_var, data_reg_128;
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        sc_uint<8> data_array[16], data_reg_var[16];
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#define assign_array_to_128() \
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{  \
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        data_reg_128.range(127,120)=data_reg_var[0]; \
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        data_reg_128.range(119,112)=data_reg_var[1]; \
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        data_reg_128.range(111,104)=data_reg_var[2]; \
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        data_reg_128.range(103,96)=data_reg_var[3]; \
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        data_reg_128.range(95,88)=data_reg_var[4]; \
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        data_reg_128.range(87,80)=data_reg_var[5]; \
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        data_reg_128.range(79,72)=data_reg_var[6]; \
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        data_reg_128.range(71,64)=data_reg_var[7]; \
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        data_reg_128.range(63,56)=data_reg_var[8]; \
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        data_reg_128.range(55,48)=data_reg_var[9]; \
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        data_reg_128.range(47,40)=data_reg_var[10]; \
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        data_reg_128.range(39,32)=data_reg_var[11]; \
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        data_reg_128.range(31,24)=data_reg_var[12]; \
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        data_reg_128.range(23,16)=data_reg_var[13]; \
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        data_reg_128.range(15,8)=data_reg_var[14]; \
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        data_reg_128.range(7,0)=data_reg_var[15]; \
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}
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#define shift_array_to_128() \
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{  \
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        data_reg_128.range(127,120)=data_reg_var[0]; \
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        data_reg_128.range(119,112)=data_reg_var[5]; \
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        data_reg_128.range(111,104)=data_reg_var[10]; \
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        data_reg_128.range(103,96)=data_reg_var[15]; \
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        data_reg_128.range(95,88)=data_reg_var[4]; \
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        data_reg_128.range(87,80)=data_reg_var[9]; \
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        data_reg_128.range(79,72)=data_reg_var[14]; \
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        data_reg_128.range(71,64)=data_reg_var[3]; \
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        data_reg_128.range(63,56)=data_reg_var[8]; \
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        data_reg_128.range(55,48)=data_reg_var[13]; \
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        data_reg_128.range(47,40)=data_reg_var[2]; \
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        data_reg_128.range(39,32)=data_reg_var[7]; \
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        data_reg_128.range(31,24)=data_reg_var[12]; \
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        data_reg_128.range(23,16)=data_reg_var[1]; \
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        data_reg_128.range(15,8)=data_reg_var[6]; \
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        data_reg_128.range(7,0)=data_reg_var[11]; \
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}
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#define invert_shift_array_to_128() \
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{  \
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        data_reg_128.range(127,120)=data_reg_var[0]; \
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        data_reg_128.range(119,112)=data_reg_var[13]; \
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        data_reg_128.range(111,104)=data_reg_var[10]; \
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        data_reg_128.range(103,96)=data_reg_var[7]; \
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        data_reg_128.range(95,88)=data_reg_var[4]; \
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        data_reg_128.range(87,80)=data_reg_var[1]; \
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        data_reg_128.range(79,72)=data_reg_var[14]; \
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        data_reg_128.range(71,64)=data_reg_var[11]; \
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        data_reg_128.range(63,56)=data_reg_var[8]; \
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        data_reg_128.range(55,48)=data_reg_var[5]; \
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        data_reg_128.range(47,40)=data_reg_var[2]; \
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        data_reg_128.range(39,32)=data_reg_var[15]; \
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        data_reg_128.range(31,24)=data_reg_var[12]; \
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        data_reg_128.range(23,16)=data_reg_var[9]; \
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        data_reg_128.range(15,8)=data_reg_var[6]; \
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        data_reg_128.range(7,0)=data_reg_var[3]; \
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}
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        data_i_var = data_i.read();
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        data_array[0] = data_i_var.range(127, 120);
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        data_array[1] = data_i_var.range(119, 112);
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        data_array[2] = data_i_var.range(111, 104);
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        data_array[3] = data_i_var.range(103, 96);
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        data_array[4] = data_i_var.range(95, 88);
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        data_array[5] = data_i_var.range(87, 80);
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        data_array[6] = data_i_var.range(79, 72);
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        data_array[7] = data_i_var.range(71, 64);
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        data_array[8] = data_i_var.range(63, 56);
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        data_array[9] = data_i_var.range(55, 48);
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        data_array[10] = data_i_var.range(47, 40);
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        data_array[11] = data_i_var.range(39, 32);
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        data_array[12] = data_i_var.range(31, 24);
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        data_array[13] = data_i_var.range(23, 16);
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        data_array[14] = data_i_var.range(15, 8);
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        data_array[15] = data_i_var.range(7, 0);
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        data_reg_var[0] = data_reg.read().range(127, 120);
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        data_reg_var[1] = data_reg.read().range(119, 112);
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        data_reg_var[2] = data_reg.read().range(111, 104);
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        data_reg_var[3] = data_reg.read().range(103, 96);
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        data_reg_var[4] = data_reg.read().range(95, 88);
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        data_reg_var[5] = data_reg.read().range(87, 80);
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        data_reg_var[6] = data_reg.read().range(79, 72);
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        data_reg_var[7] = data_reg.read().range(71, 64);
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        data_reg_var[8] = data_reg.read().range(63, 56);
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        data_reg_var[9] = data_reg.read().range(55, 48);
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        data_reg_var[10] = data_reg.read().range(47, 40);
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        data_reg_var[11] = data_reg.read().range(39, 32);
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        data_reg_var[12] = data_reg.read().range(31, 24);
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        data_reg_var[13] = data_reg.read().range(23, 16);
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        data_reg_var[14] = data_reg.read().range(15, 8);
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        data_reg_var[15] = data_reg.read().range(7, 0);
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        sbox_decrypt_o.write(decrypt_i.read());
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        sbox_data_o.write(0);
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        next_state.write(state.read());
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        next_data_reg.write(data_reg.read());
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        next_ready_o.write(0);
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        data_o.write(data_reg.read());
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        switch (state.read())
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        {
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                case 0:
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                        if (start_i.read())
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                        {
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                                sbox_data_o.write(data_array[0]);
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                                next_state.write(1);
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                        }
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                        break;
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                case 16:
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                        data_reg_var[15] = sbox_data_i.read();
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                        //Make shift rows stage
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                        switch (decrypt_i.read())
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                        {
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                                case 0:
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                                        shift_array_to_128();
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                                        break;
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                                case 1:
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                                        invert_shift_array_to_128();
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                                        break;
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                        }
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                        next_data_reg.write(data_reg_128);
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                        next_ready_o.write(1);
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                        next_state.write(0);
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                        break;
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                default:
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                        sbox_data_o.write(data_array[(int)state.read()]);
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                        data_reg_var[(int)state.read()-1] = sbox_data_i.read();
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                        assign_array_to_128();
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                        next_data_reg.write(data_reg_128);
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                        next_state.write(state.read() + 1);
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                        break;
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        }
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}
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void subbytes::registers()
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{
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        if (!reset.read())
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        {
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                data_reg.write(0);
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                state.write(0);
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                ready_o.write(0);
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        }
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        else
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        {
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                data_reg.write(next_data_reg.read());
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                state.write(next_state.read());
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                ready_o.write(next_ready_o.read());
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        }
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}

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