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foss-fpga-tools / third_party / vtr-verilog-to-routing / 0a8dcf10219ceecb9d0b3e304cd0e987faea9c17 / . / vtr_flow / benchmarks / arithmetic / summary / rc4.v
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// RC4 PRGA module implementation
// Copyright 2012 - Alfredo Ortega
// aortega@alu.itba.edu.ar
// aortega@groundworkstech.com
// This library 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 3 of the License, or (at your option) any later version.
// This library 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 library. If not, see <http://www.gnu.org/licenses/>.
// RC4 PRGA constants
// Copyright 2012 - Alfredo Ortega
// aortega@alu.itba.edu.ar
// This library 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 3 of the License, or (at your option) any later version.
// This library 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 library. If not, see <http://www.gnu.org/licenses/>.
//%%GENDEFINE%% (choose_to, nonblocking, 0, 256 )
//%%GENDEFINE%% (choose_from, blocking, 0, 256 )
//%%GENDEFINE%% (choose_from, nonblocking, 0, 256 )
//%%GENDEFINE%% (choose_to, nonblocking, 0, 255 )
//%%GENDEFINE%% (choose_from, blocking, 0, 255 )
//%%GENDEFINE%% (choose_from, nonblocking, 0, 255 )
//%%GENDEFINE%% (choose_to, nonblocking, 0, 6 )
//%%GENDEFINE%% (choose_from, blocking, 0, 6 )
//%%GENDEFINE%% (choose_from, blocking, 0, 6 )
//%%GENDEFINE%% (always_list, 0, 256)
//%%GENDEFINE%% (always_list, 0, 255)
//%%GENDEFINE%% (always_list, 0, 6)
//%%GENDEFINE%% (mod_op, blocking, 7, 0, 255)
module rc4(clk,
rst,
output_ready,
password_input,
K);
input clk; // Clock
input rst; // Reset
input [7:0] password_input; // Password input
output output_ready; // Output valid
output [7:0] K; // Output port
wire clk, rst; // clock, reset
reg output_ready;
wire [7:0] password_input;
// RC4 PRGA
// Key
reg [7:0] key_0;
reg [7:0] key_1;
reg [7:0] key_2;
reg [7:0] key_3;
reg [7:0] key_4;
reg [7:0] key_5;
reg [7:0] key_6;
// S array
reg [7:0] S_0;
reg [7:0] S_1;
reg [7:0] S_2;
reg [7:0] S_3;
reg [7:0] S_4;
reg [7:0] S_5;
reg [7:0] S_6;
reg [7:0] S_7;
reg [7:0] S_8;
reg [7:0] S_9;
reg [7:0] S_10;
reg [7:0] S_11;
reg [7:0] S_12;
reg [7:0] S_13;
reg [7:0] S_14;
reg [7:0] S_15;
reg [7:0] S_16;
reg [7:0] S_17;
reg [7:0] S_18;
reg [7:0] S_19;
reg [7:0] S_20;
reg [7:0] S_21;
reg [7:0] S_22;
reg [7:0] S_23;
reg [7:0] S_24;
reg [7:0] S_25;
reg [7:0] S_26;
reg [7:0] S_27;
reg [7:0] S_28;
reg [7:0] S_29;
reg [7:0] S_30;
reg [7:0] S_31;
reg [7:0] S_32;
reg [7:0] S_33;
reg [7:0] S_34;
reg [7:0] S_35;
reg [7:0] S_36;
reg [7:0] S_37;
reg [7:0] S_38;
reg [7:0] S_39;
reg [7:0] S_40;
reg [7:0] S_41;
reg [7:0] S_42;
reg [7:0] S_43;
reg [7:0] S_44;
reg [7:0] S_45;
reg [7:0] S_46;
reg [7:0] S_47;
reg [7:0] S_48;
reg [7:0] S_49;
reg [7:0] S_50;
reg [7:0] S_51;
reg [7:0] S_52;
reg [7:0] S_53;
reg [7:0] S_54;
reg [7:0] S_55;
reg [7:0] S_56;
reg [7:0] S_57;
reg [7:0] S_58;
reg [7:0] S_59;
reg [7:0] S_60;
reg [7:0] S_61;
reg [7:0] S_62;
reg [7:0] S_63;
reg [7:0] S_64;
reg [7:0] S_65;
reg [7:0] S_66;
reg [7:0] S_67;
reg [7:0] S_68;
reg [7:0] S_69;
reg [7:0] S_70;
reg [7:0] S_71;
reg [7:0] S_72;
reg [7:0] S_73;
reg [7:0] S_74;
reg [7:0] S_75;
reg [7:0] S_76;
reg [7:0] S_77;
reg [7:0] S_78;
reg [7:0] S_79;
reg [7:0] S_80;
reg [7:0] S_81;
reg [7:0] S_82;
reg [7:0] S_83;
reg [7:0] S_84;
reg [7:0] S_85;
reg [7:0] S_86;
reg [7:0] S_87;
reg [7:0] S_88;
reg [7:0] S_89;
reg [7:0] S_90;
reg [7:0] S_91;
reg [7:0] S_92;
reg [7:0] S_93;
reg [7:0] S_94;
reg [7:0] S_95;
reg [7:0] S_96;
reg [7:0] S_97;
reg [7:0] S_98;
reg [7:0] S_99;
reg [7:0] S_100;
reg [7:0] S_101;
reg [7:0] S_102;
reg [7:0] S_103;
reg [7:0] S_104;
reg [7:0] S_105;
reg [7:0] S_106;
reg [7:0] S_107;
reg [7:0] S_108;
reg [7:0] S_109;
reg [7:0] S_110;
reg [7:0] S_111;
reg [7:0] S_112;
reg [7:0] S_113;
reg [7:0] S_114;
reg [7:0] S_115;
reg [7:0] S_116;
reg [7:0] S_117;
reg [7:0] S_118;
reg [7:0] S_119;
reg [7:0] S_120;
reg [7:0] S_121;
reg [7:0] S_122;
reg [7:0] S_123;
reg [7:0] S_124;
reg [7:0] S_125;
reg [7:0] S_126;
reg [7:0] S_127;
reg [7:0] S_128;
reg [7:0] S_129;
reg [7:0] S_130;
reg [7:0] S_131;
reg [7:0] S_132;
reg [7:0] S_133;
reg [7:0] S_134;
reg [7:0] S_135;
reg [7:0] S_136;
reg [7:0] S_137;
reg [7:0] S_138;
reg [7:0] S_139;
reg [7:0] S_140;
reg [7:0] S_141;
reg [7:0] S_142;
reg [7:0] S_143;
reg [7:0] S_144;
reg [7:0] S_145;
reg [7:0] S_146;
reg [7:0] S_147;
reg [7:0] S_148;
reg [7:0] S_149;
reg [7:0] S_150;
reg [7:0] S_151;
reg [7:0] S_152;
reg [7:0] S_153;
reg [7:0] S_154;
reg [7:0] S_155;
reg [7:0] S_156;
reg [7:0] S_157;
reg [7:0] S_158;
reg [7:0] S_159;
reg [7:0] S_160;
reg [7:0] S_161;
reg [7:0] S_162;
reg [7:0] S_163;
reg [7:0] S_164;
reg [7:0] S_165;
reg [7:0] S_166;
reg [7:0] S_167;
reg [7:0] S_168;
reg [7:0] S_169;
reg [7:0] S_170;
reg [7:0] S_171;
reg [7:0] S_172;
reg [7:0] S_173;
reg [7:0] S_174;
reg [7:0] S_175;
reg [7:0] S_176;
reg [7:0] S_177;
reg [7:0] S_178;
reg [7:0] S_179;
reg [7:0] S_180;
reg [7:0] S_181;
reg [7:0] S_182;
reg [7:0] S_183;
reg [7:0] S_184;
reg [7:0] S_185;
reg [7:0] S_186;
reg [7:0] S_187;
reg [7:0] S_188;
reg [7:0] S_189;
reg [7:0] S_190;
reg [7:0] S_191;
reg [7:0] S_192;
reg [7:0] S_193;
reg [7:0] S_194;
reg [7:0] S_195;
reg [7:0] S_196;
reg [7:0] S_197;
reg [7:0] S_198;
reg [7:0] S_199;
reg [7:0] S_200;
reg [7:0] S_201;
reg [7:0] S_202;
reg [7:0] S_203;
reg [7:0] S_204;
reg [7:0] S_205;
reg [7:0] S_206;
reg [7:0] S_207;
reg [7:0] S_208;
reg [7:0] S_209;
reg [7:0] S_210;
reg [7:0] S_211;
reg [7:0] S_212;
reg [7:0] S_213;
reg [7:0] S_214;
reg [7:0] S_215;
reg [7:0] S_216;
reg [7:0] S_217;
reg [7:0] S_218;
reg [7:0] S_219;
reg [7:0] S_220;
reg [7:0] S_221;
reg [7:0] S_222;
reg [7:0] S_223;
reg [7:0] S_224;
reg [7:0] S_225;
reg [7:0] S_226;
reg [7:0] S_227;
reg [7:0] S_228;
reg [7:0] S_229;
reg [7:0] S_230;
reg [7:0] S_231;
reg [7:0] S_232;
reg [7:0] S_233;
reg [7:0] S_234;
reg [7:0] S_235;
reg [7:0] S_236;
reg [7:0] S_237;
reg [7:0] S_238;
reg [7:0] S_239;
reg [7:0] S_240;
reg [7:0] S_241;
reg [7:0] S_242;
reg [7:0] S_243;
reg [7:0] S_244;
reg [7:0] S_245;
reg [7:0] S_246;
reg [7:0] S_247;
reg [7:0] S_248;
reg [7:0] S_249;
reg [7:0] S_250;
reg [7:0] S_251;
reg [7:0] S_252;
reg [7:0] S_253;
reg [7:0] S_254;
reg [7:0] S_255;
reg [7:0] S_256;
reg [10:0] discardCount;
// Key-scheduling state
// Variable names from http://en.wikipedia.org/wiki/RC4
reg [3:0] KSState;
reg [7:0] i; // Counter
reg [7:0] j;
reg [7:0] K;
reg [7:0] S_of_i;
reg [7:0] S_of_i_plus_1;
reg [7:0] S_of_j;
wire [7:0] S_of_i_plus_S_of_j;
reg [7:0] prev_i;
reg [7:0] prev_S_of_j;
reg [7:0] key_of_i_mod_KEYSIZE;
reg [7:0] i_mod_KEYSIZE;
always @ (i or S_0 or S_1 or S_2 or S_3 or S_4 or S_5 or S_6 or S_7 or S_8 or S_9 or S_10 or S_11 or S_12 or S_13 or S_14 or S_15 or S_16 or S_17 or S_18 or S_19 or S_20 or S_21 or S_22 or S_23 or S_24 or S_25 or S_26 or S_27 or S_28 or S_29 or S_30 or S_31 or S_32 or S_33 or S_34 or S_35 or S_36 or S_37 or S_38 or S_39 or S_40 or S_41 or S_42 or S_43 or S_44 or S_45 or S_46 or S_47 or S_48 or S_49 or S_50 or S_51 or S_52 or S_53 or S_54 or S_55 or S_56 or S_57 or S_58 or S_59 or S_60 or S_61 or S_62 or S_63 or S_64 or S_65 or S_66 or S_67 or S_68 or S_69 or S_70 or S_71 or S_72 or S_73 or S_74 or S_75 or S_76 or S_77 or S_78 or S_79 or S_80 or S_81 or S_82 or S_83 or S_84 or S_85 or S_86 or S_87 or S_88 or S_89 or S_90 or S_91 or S_92 or S_93 or S_94 or S_95 or S_96 or S_97 or S_98 or S_99 or S_100 or S_101 or S_102 or S_103 or S_104 or S_105 or S_106 or S_107 or S_108 or S_109 or S_110 or S_111 or S_112 or S_113 or S_114 or S_115 or S_116 or S_117 or S_118 or S_119 or S_120 or S_121 or S_122 or S_123 or S_124 or S_125 or S_126 or S_127 or S_128 or S_129 or S_130 or S_131 or S_132 or S_133 or S_134 or S_135 or S_136 or S_137 or S_138 or S_139 or S_140 or S_141 or S_142 or S_143 or S_144 or S_145 or S_146 or S_147 or S_148 or S_149 or S_150 or S_151 or S_152 or S_153 or S_154 or S_155 or S_156 or S_157 or S_158 or S_159 or S_160 or S_161 or S_162 or S_163 or S_164 or S_165 or S_166 or S_167 or S_168 or S_169 or S_170 or S_171 or S_172 or S_173 or S_174 or S_175 or S_176 or S_177 or S_178 or S_179 or S_180 or S_181 or S_182 or S_183 or S_184 or S_185 or S_186 or S_187 or S_188 or S_189 or S_190 or S_191 or S_192 or S_193 or S_194 or S_195 or S_196 or S_197 or S_198 or S_199 or S_200 or S_201 or S_202 or S_203 or S_204 or S_205 or S_206 or S_207 or S_208 or S_209 or S_210 or S_211 or S_212 or S_213 or S_214 or S_215 or S_216 or S_217 or S_218 or S_219 or S_220 or S_221 or S_222 or S_223 or S_224 or S_225 or S_226 or S_227 or S_228 or S_229 or S_230 or S_231 or S_232 or S_233 or S_234 or S_235 or S_236 or S_237 or S_238 or S_239 or S_240 or S_241 or S_242 or S_243 or S_244 or S_245 or S_246 or S_247 or S_248 or S_249 or S_250 or S_251 or S_252 or S_253 or S_254 or S_255) begin
case (i)
'd0:S_of_i = S_0;
'd1:S_of_i = S_1;
'd2:S_of_i = S_2;
'd3:S_of_i = S_3;
'd4:S_of_i = S_4;
'd5:S_of_i = S_5;
'd6:S_of_i = S_6;
'd7:S_of_i = S_7;
'd8:S_of_i = S_8;
'd9:S_of_i = S_9;
'd10:S_of_i = S_10;
'd11:S_of_i = S_11;
'd12:S_of_i = S_12;
'd13:S_of_i = S_13;
'd14:S_of_i = S_14;
'd15:S_of_i = S_15;
'd16:S_of_i = S_16;
'd17:S_of_i = S_17;
'd18:S_of_i = S_18;
'd19:S_of_i = S_19;
'd20:S_of_i = S_20;
'd21:S_of_i = S_21;
'd22:S_of_i = S_22;
'd23:S_of_i = S_23;
'd24:S_of_i = S_24;
'd25:S_of_i = S_25;
'd26:S_of_i = S_26;
'd27:S_of_i = S_27;
'd28:S_of_i = S_28;
'd29:S_of_i = S_29;
'd30:S_of_i = S_30;
'd31:S_of_i = S_31;
'd32:S_of_i = S_32;
'd33:S_of_i = S_33;
'd34:S_of_i = S_34;
'd35:S_of_i = S_35;
'd36:S_of_i = S_36;
'd37:S_of_i = S_37;
'd38:S_of_i = S_38;
'd39:S_of_i = S_39;
'd40:S_of_i = S_40;
'd41:S_of_i = S_41;
'd42:S_of_i = S_42;
'd43:S_of_i = S_43;
'd44:S_of_i = S_44;
'd45:S_of_i = S_45;
'd46:S_of_i = S_46;
'd47:S_of_i = S_47;
'd48:S_of_i = S_48;
'd49:S_of_i = S_49;
'd50:S_of_i = S_50;
'd51:S_of_i = S_51;
'd52:S_of_i = S_52;
'd53:S_of_i = S_53;
'd54:S_of_i = S_54;
'd55:S_of_i = S_55;
'd56:S_of_i = S_56;
'd57:S_of_i = S_57;
'd58:S_of_i = S_58;
'd59:S_of_i = S_59;
'd60:S_of_i = S_60;
'd61:S_of_i = S_61;
'd62:S_of_i = S_62;
'd63:S_of_i = S_63;
'd64:S_of_i = S_64;
'd65:S_of_i = S_65;
'd66:S_of_i = S_66;
'd67:S_of_i = S_67;
'd68:S_of_i = S_68;
'd69:S_of_i = S_69;
'd70:S_of_i = S_70;
'd71:S_of_i = S_71;
'd72:S_of_i = S_72;
'd73:S_of_i = S_73;
'd74:S_of_i = S_74;
'd75:S_of_i = S_75;
'd76:S_of_i = S_76;
'd77:S_of_i = S_77;
'd78:S_of_i = S_78;
'd79:S_of_i = S_79;
'd80:S_of_i = S_80;
'd81:S_of_i = S_81;
'd82:S_of_i = S_82;
'd83:S_of_i = S_83;
'd84:S_of_i = S_84;
'd85:S_of_i = S_85;
'd86:S_of_i = S_86;
'd87:S_of_i = S_87;
'd88:S_of_i = S_88;
'd89:S_of_i = S_89;
'd90:S_of_i = S_90;
'd91:S_of_i = S_91;
'd92:S_of_i = S_92;
'd93:S_of_i = S_93;
'd94:S_of_i = S_94;
'd95:S_of_i = S_95;
'd96:S_of_i = S_96;
'd97:S_of_i = S_97;
'd98:S_of_i = S_98;
'd99:S_of_i = S_99;
'd100:S_of_i = S_100;
'd101:S_of_i = S_101;
'd102:S_of_i = S_102;
'd103:S_of_i = S_103;
'd104:S_of_i = S_104;
'd105:S_of_i = S_105;
'd106:S_of_i = S_106;
'd107:S_of_i = S_107;
'd108:S_of_i = S_108;
'd109:S_of_i = S_109;
'd110:S_of_i = S_110;
'd111:S_of_i = S_111;
'd112:S_of_i = S_112;
'd113:S_of_i = S_113;
'd114:S_of_i = S_114;
'd115:S_of_i = S_115;
'd116:S_of_i = S_116;
'd117:S_of_i = S_117;
'd118:S_of_i = S_118;
'd119:S_of_i = S_119;
'd120:S_of_i = S_120;
'd121:S_of_i = S_121;
'd122:S_of_i = S_122;
'd123:S_of_i = S_123;
'd124:S_of_i = S_124;
'd125:S_of_i = S_125;
'd126:S_of_i = S_126;
'd127:S_of_i = S_127;
'd128:S_of_i = S_128;
'd129:S_of_i = S_129;
'd130:S_of_i = S_130;
'd131:S_of_i = S_131;
'd132:S_of_i = S_132;
'd133:S_of_i = S_133;
'd134:S_of_i = S_134;
'd135:S_of_i = S_135;
'd136:S_of_i = S_136;
'd137:S_of_i = S_137;
'd138:S_of_i = S_138;
'd139:S_of_i = S_139;
'd140:S_of_i = S_140;
'd141:S_of_i = S_141;
'd142:S_of_i = S_142;
'd143:S_of_i = S_143;
'd144:S_of_i = S_144;
'd145:S_of_i = S_145;
'd146:S_of_i = S_146;
'd147:S_of_i = S_147;
'd148:S_of_i = S_148;
'd149:S_of_i = S_149;
'd150:S_of_i = S_150;
'd151:S_of_i = S_151;
'd152:S_of_i = S_152;
'd153:S_of_i = S_153;
'd154:S_of_i = S_154;
'd155:S_of_i = S_155;
'd156:S_of_i = S_156;
'd157:S_of_i = S_157;
'd158:S_of_i = S_158;
'd159:S_of_i = S_159;
'd160:S_of_i = S_160;
'd161:S_of_i = S_161;
'd162:S_of_i = S_162;
'd163:S_of_i = S_163;
'd164:S_of_i = S_164;
'd165:S_of_i = S_165;
'd166:S_of_i = S_166;
'd167:S_of_i = S_167;
'd168:S_of_i = S_168;
'd169:S_of_i = S_169;
'd170:S_of_i = S_170;
'd171:S_of_i = S_171;
'd172:S_of_i = S_172;
'd173:S_of_i = S_173;
'd174:S_of_i = S_174;
'd175:S_of_i = S_175;
'd176:S_of_i = S_176;
'd177:S_of_i = S_177;
'd178:S_of_i = S_178;
'd179:S_of_i = S_179;
'd180:S_of_i = S_180;
'd181:S_of_i = S_181;
'd182:S_of_i = S_182;
'd183:S_of_i = S_183;
'd184:S_of_i = S_184;
'd185:S_of_i = S_185;
'd186:S_of_i = S_186;
'd187:S_of_i = S_187;
'd188:S_of_i = S_188;
'd189:S_of_i = S_189;
'd190:S_of_i = S_190;
'd191:S_of_i = S_191;
'd192:S_of_i = S_192;
'd193:S_of_i = S_193;
'd194:S_of_i = S_194;
'd195:S_of_i = S_195;
'd196:S_of_i = S_196;
'd197:S_of_i = S_197;
'd198:S_of_i = S_198;
'd199:S_of_i = S_199;
'd200:S_of_i = S_200;
'd201:S_of_i = S_201;
'd202:S_of_i = S_202;
'd203:S_of_i = S_203;
'd204:S_of_i = S_204;
'd205:S_of_i = S_205;
'd206:S_of_i = S_206;
'd207:S_of_i = S_207;
'd208:S_of_i = S_208;
'd209:S_of_i = S_209;
'd210:S_of_i = S_210;
'd211:S_of_i = S_211;
'd212:S_of_i = S_212;
'd213:S_of_i = S_213;
'd214:S_of_i = S_214;
'd215:S_of_i = S_215;
'd216:S_of_i = S_216;
'd217:S_of_i = S_217;
'd218:S_of_i = S_218;
'd219:S_of_i = S_219;
'd220:S_of_i = S_220;
'd221:S_of_i = S_221;
'd222:S_of_i = S_222;
'd223:S_of_i = S_223;
'd224:S_of_i = S_224;
'd225:S_of_i = S_225;
'd226:S_of_i = S_226;
'd227:S_of_i = S_227;
'd228:S_of_i = S_228;
'd229:S_of_i = S_229;
'd230:S_of_i = S_230;
'd231:S_of_i = S_231;
'd232:S_of_i = S_232;
'd233:S_of_i = S_233;
'd234:S_of_i = S_234;
'd235:S_of_i = S_235;
'd236:S_of_i = S_236;
'd237:S_of_i = S_237;
'd238:S_of_i = S_238;
'd239:S_of_i = S_239;
'd240:S_of_i = S_240;
'd241:S_of_i = S_241;
'd242:S_of_i = S_242;
'd243:S_of_i = S_243;
'd244:S_of_i = S_244;
'd245:S_of_i = S_245;
'd246:S_of_i = S_246;
'd247:S_of_i = S_247;
'd248:S_of_i = S_248;
'd249:S_of_i = S_249;
'd250:S_of_i = S_250;
'd251:S_of_i = S_251;
'd252:S_of_i = S_252;
'd253:S_of_i = S_253;
'd254:S_of_i = S_254;
default:S_of_i = S_255;
endcase
end
always @ (i or S_0 or S_1 or S_2 or S_3 or S_4 or S_5 or S_6 or S_7 or S_8 or S_9 or S_10 or S_11 or S_12 or S_13 or S_14 or S_15 or S_16 or S_17 or S_18 or S_19 or S_20 or S_21 or S_22 or S_23 or S_24 or S_25 or S_26 or S_27 or S_28 or S_29 or S_30 or S_31 or S_32 or S_33 or S_34 or S_35 or S_36 or S_37 or S_38 or S_39 or S_40 or S_41 or S_42 or S_43 or S_44 or S_45 or S_46 or S_47 or S_48 or S_49 or S_50 or S_51 or S_52 or S_53 or S_54 or S_55 or S_56 or S_57 or S_58 or S_59 or S_60 or S_61 or S_62 or S_63 or S_64 or S_65 or S_66 or S_67 or S_68 or S_69 or S_70 or S_71 or S_72 or S_73 or S_74 or S_75 or S_76 or S_77 or S_78 or S_79 or S_80 or S_81 or S_82 or S_83 or S_84 or S_85 or S_86 or S_87 or S_88 or S_89 or S_90 or S_91 or S_92 or S_93 or S_94 or S_95 or S_96 or S_97 or S_98 or S_99 or S_100 or S_101 or S_102 or S_103 or S_104 or S_105 or S_106 or S_107 or S_108 or S_109 or S_110 or S_111 or S_112 or S_113 or S_114 or S_115 or S_116 or S_117 or S_118 or S_119 or S_120 or S_121 or S_122 or S_123 or S_124 or S_125 or S_126 or S_127 or S_128 or S_129 or S_130 or S_131 or S_132 or S_133 or S_134 or S_135 or S_136 or S_137 or S_138 or S_139 or S_140 or S_141 or S_142 or S_143 or S_144 or S_145 or S_146 or S_147 or S_148 or S_149 or S_150 or S_151 or S_152 or S_153 or S_154 or S_155 or S_156 or S_157 or S_158 or S_159 or S_160 or S_161 or S_162 or S_163 or S_164 or S_165 or S_166 or S_167 or S_168 or S_169 or S_170 or S_171 or S_172 or S_173 or S_174 or S_175 or S_176 or S_177 or S_178 or S_179 or S_180 or S_181 or S_182 or S_183 or S_184 or S_185 or S_186 or S_187 or S_188 or S_189 or S_190 or S_191 or S_192 or S_193 or S_194 or S_195 or S_196 or S_197 or S_198 or S_199 or S_200 or S_201 or S_202 or S_203 or S_204 or S_205 or S_206 or S_207 or S_208 or S_209 or S_210 or S_211 or S_212 or S_213 or S_214 or S_215 or S_216 or S_217 or S_218 or S_219 or S_220 or S_221 or S_222 or S_223 or S_224 or S_225 or S_226 or S_227 or S_228 or S_229 or S_230 or S_231 or S_232 or S_233 or S_234 or S_235 or S_236 or S_237 or S_238 or S_239 or S_240 or S_241 or S_242 or S_243 or S_244 or S_245 or S_246 or S_247 or S_248 or S_249 or S_250 or S_251 or S_252 or S_253 or S_254 or S_255 or S_256) begin
case (i+1)
'd0:S_of_i_plus_1 = S_0;
'd1:S_of_i_plus_1 = S_1;
'd2:S_of_i_plus_1 = S_2;
'd3:S_of_i_plus_1 = S_3;
'd4:S_of_i_plus_1 = S_4;
'd5:S_of_i_plus_1 = S_5;
'd6:S_of_i_plus_1 = S_6;
'd7:S_of_i_plus_1 = S_7;
'd8:S_of_i_plus_1 = S_8;
'd9:S_of_i_plus_1 = S_9;
'd10:S_of_i_plus_1 = S_10;
'd11:S_of_i_plus_1 = S_11;
'd12:S_of_i_plus_1 = S_12;
'd13:S_of_i_plus_1 = S_13;
'd14:S_of_i_plus_1 = S_14;
'd15:S_of_i_plus_1 = S_15;
'd16:S_of_i_plus_1 = S_16;
'd17:S_of_i_plus_1 = S_17;
'd18:S_of_i_plus_1 = S_18;
'd19:S_of_i_plus_1 = S_19;
'd20:S_of_i_plus_1 = S_20;
'd21:S_of_i_plus_1 = S_21;
'd22:S_of_i_plus_1 = S_22;
'd23:S_of_i_plus_1 = S_23;
'd24:S_of_i_plus_1 = S_24;
'd25:S_of_i_plus_1 = S_25;
'd26:S_of_i_plus_1 = S_26;
'd27:S_of_i_plus_1 = S_27;
'd28:S_of_i_plus_1 = S_28;
'd29:S_of_i_plus_1 = S_29;
'd30:S_of_i_plus_1 = S_30;
'd31:S_of_i_plus_1 = S_31;
'd32:S_of_i_plus_1 = S_32;
'd33:S_of_i_plus_1 = S_33;
'd34:S_of_i_plus_1 = S_34;
'd35:S_of_i_plus_1 = S_35;
'd36:S_of_i_plus_1 = S_36;
'd37:S_of_i_plus_1 = S_37;
'd38:S_of_i_plus_1 = S_38;
'd39:S_of_i_plus_1 = S_39;
'd40:S_of_i_plus_1 = S_40;
'd41:S_of_i_plus_1 = S_41;
'd42:S_of_i_plus_1 = S_42;
'd43:S_of_i_plus_1 = S_43;
'd44:S_of_i_plus_1 = S_44;
'd45:S_of_i_plus_1 = S_45;
'd46:S_of_i_plus_1 = S_46;
'd47:S_of_i_plus_1 = S_47;
'd48:S_of_i_plus_1 = S_48;
'd49:S_of_i_plus_1 = S_49;
'd50:S_of_i_plus_1 = S_50;
'd51:S_of_i_plus_1 = S_51;
'd52:S_of_i_plus_1 = S_52;
'd53:S_of_i_plus_1 = S_53;
'd54:S_of_i_plus_1 = S_54;
'd55:S_of_i_plus_1 = S_55;
'd56:S_of_i_plus_1 = S_56;
'd57:S_of_i_plus_1 = S_57;
'd58:S_of_i_plus_1 = S_58;
'd59:S_of_i_plus_1 = S_59;
'd60:S_of_i_plus_1 = S_60;
'd61:S_of_i_plus_1 = S_61;
'd62:S_of_i_plus_1 = S_62;
'd63:S_of_i_plus_1 = S_63;
'd64:S_of_i_plus_1 = S_64;
'd65:S_of_i_plus_1 = S_65;
'd66:S_of_i_plus_1 = S_66;
'd67:S_of_i_plus_1 = S_67;
'd68:S_of_i_plus_1 = S_68;
'd69:S_of_i_plus_1 = S_69;
'd70:S_of_i_plus_1 = S_70;
'd71:S_of_i_plus_1 = S_71;
'd72:S_of_i_plus_1 = S_72;
'd73:S_of_i_plus_1 = S_73;
'd74:S_of_i_plus_1 = S_74;
'd75:S_of_i_plus_1 = S_75;
'd76:S_of_i_plus_1 = S_76;
'd77:S_of_i_plus_1 = S_77;
'd78:S_of_i_plus_1 = S_78;
'd79:S_of_i_plus_1 = S_79;
'd80:S_of_i_plus_1 = S_80;
'd81:S_of_i_plus_1 = S_81;
'd82:S_of_i_plus_1 = S_82;
'd83:S_of_i_plus_1 = S_83;
'd84:S_of_i_plus_1 = S_84;
'd85:S_of_i_plus_1 = S_85;
'd86:S_of_i_plus_1 = S_86;
'd87:S_of_i_plus_1 = S_87;
'd88:S_of_i_plus_1 = S_88;
'd89:S_of_i_plus_1 = S_89;
'd90:S_of_i_plus_1 = S_90;
'd91:S_of_i_plus_1 = S_91;
'd92:S_of_i_plus_1 = S_92;
'd93:S_of_i_plus_1 = S_93;
'd94:S_of_i_plus_1 = S_94;
'd95:S_of_i_plus_1 = S_95;
'd96:S_of_i_plus_1 = S_96;
'd97:S_of_i_plus_1 = S_97;
'd98:S_of_i_plus_1 = S_98;
'd99:S_of_i_plus_1 = S_99;
'd100:S_of_i_plus_1 = S_100;
'd101:S_of_i_plus_1 = S_101;
'd102:S_of_i_plus_1 = S_102;
'd103:S_of_i_plus_1 = S_103;
'd104:S_of_i_plus_1 = S_104;
'd105:S_of_i_plus_1 = S_105;
'd106:S_of_i_plus_1 = S_106;
'd107:S_of_i_plus_1 = S_107;
'd108:S_of_i_plus_1 = S_108;
'd109:S_of_i_plus_1 = S_109;
'd110:S_of_i_plus_1 = S_110;
'd111:S_of_i_plus_1 = S_111;
'd112:S_of_i_plus_1 = S_112;
'd113:S_of_i_plus_1 = S_113;
'd114:S_of_i_plus_1 = S_114;
'd115:S_of_i_plus_1 = S_115;
'd116:S_of_i_plus_1 = S_116;
'd117:S_of_i_plus_1 = S_117;
'd118:S_of_i_plus_1 = S_118;
'd119:S_of_i_plus_1 = S_119;
'd120:S_of_i_plus_1 = S_120;
'd121:S_of_i_plus_1 = S_121;
'd122:S_of_i_plus_1 = S_122;
'd123:S_of_i_plus_1 = S_123;
'd124:S_of_i_plus_1 = S_124;
'd125:S_of_i_plus_1 = S_125;
'd126:S_of_i_plus_1 = S_126;
'd127:S_of_i_plus_1 = S_127;
'd128:S_of_i_plus_1 = S_128;
'd129:S_of_i_plus_1 = S_129;
'd130:S_of_i_plus_1 = S_130;
'd131:S_of_i_plus_1 = S_131;
'd132:S_of_i_plus_1 = S_132;
'd133:S_of_i_plus_1 = S_133;
'd134:S_of_i_plus_1 = S_134;
'd135:S_of_i_plus_1 = S_135;
'd136:S_of_i_plus_1 = S_136;
'd137:S_of_i_plus_1 = S_137;
'd138:S_of_i_plus_1 = S_138;
'd139:S_of_i_plus_1 = S_139;
'd140:S_of_i_plus_1 = S_140;
'd141:S_of_i_plus_1 = S_141;
'd142:S_of_i_plus_1 = S_142;
'd143:S_of_i_plus_1 = S_143;
'd144:S_of_i_plus_1 = S_144;
'd145:S_of_i_plus_1 = S_145;
'd146:S_of_i_plus_1 = S_146;
'd147:S_of_i_plus_1 = S_147;
'd148:S_of_i_plus_1 = S_148;
'd149:S_of_i_plus_1 = S_149;
'd150:S_of_i_plus_1 = S_150;
'd151:S_of_i_plus_1 = S_151;
'd152:S_of_i_plus_1 = S_152;
'd153:S_of_i_plus_1 = S_153;
'd154:S_of_i_plus_1 = S_154;
'd155:S_of_i_plus_1 = S_155;
'd156:S_of_i_plus_1 = S_156;
'd157:S_of_i_plus_1 = S_157;
'd158:S_of_i_plus_1 = S_158;
'd159:S_of_i_plus_1 = S_159;
'd160:S_of_i_plus_1 = S_160;
'd161:S_of_i_plus_1 = S_161;
'd162:S_of_i_plus_1 = S_162;
'd163:S_of_i_plus_1 = S_163;
'd164:S_of_i_plus_1 = S_164;
'd165:S_of_i_plus_1 = S_165;
'd166:S_of_i_plus_1 = S_166;
'd167:S_of_i_plus_1 = S_167;
'd168:S_of_i_plus_1 = S_168;
'd169:S_of_i_plus_1 = S_169;
'd170:S_of_i_plus_1 = S_170;
'd171:S_of_i_plus_1 = S_171;
'd172:S_of_i_plus_1 = S_172;
'd173:S_of_i_plus_1 = S_173;
'd174:S_of_i_plus_1 = S_174;
'd175:S_of_i_plus_1 = S_175;
'd176:S_of_i_plus_1 = S_176;
'd177:S_of_i_plus_1 = S_177;
'd178:S_of_i_plus_1 = S_178;
'd179:S_of_i_plus_1 = S_179;
'd180:S_of_i_plus_1 = S_180;
'd181:S_of_i_plus_1 = S_181;
'd182:S_of_i_plus_1 = S_182;
'd183:S_of_i_plus_1 = S_183;
'd184:S_of_i_plus_1 = S_184;
'd185:S_of_i_plus_1 = S_185;
'd186:S_of_i_plus_1 = S_186;
'd187:S_of_i_plus_1 = S_187;
'd188:S_of_i_plus_1 = S_188;
'd189:S_of_i_plus_1 = S_189;
'd190:S_of_i_plus_1 = S_190;
'd191:S_of_i_plus_1 = S_191;
'd192:S_of_i_plus_1 = S_192;
'd193:S_of_i_plus_1 = S_193;
'd194:S_of_i_plus_1 = S_194;
'd195:S_of_i_plus_1 = S_195;
'd196:S_of_i_plus_1 = S_196;
'd197:S_of_i_plus_1 = S_197;
'd198:S_of_i_plus_1 = S_198;
'd199:S_of_i_plus_1 = S_199;
'd200:S_of_i_plus_1 = S_200;
'd201:S_of_i_plus_1 = S_201;
'd202:S_of_i_plus_1 = S_202;
'd203:S_of_i_plus_1 = S_203;
'd204:S_of_i_plus_1 = S_204;
'd205:S_of_i_plus_1 = S_205;
'd206:S_of_i_plus_1 = S_206;
'd207:S_of_i_plus_1 = S_207;
'd208:S_of_i_plus_1 = S_208;
'd209:S_of_i_plus_1 = S_209;
'd210:S_of_i_plus_1 = S_210;
'd211:S_of_i_plus_1 = S_211;
'd212:S_of_i_plus_1 = S_212;
'd213:S_of_i_plus_1 = S_213;
'd214:S_of_i_plus_1 = S_214;
'd215:S_of_i_plus_1 = S_215;
'd216:S_of_i_plus_1 = S_216;
'd217:S_of_i_plus_1 = S_217;
'd218:S_of_i_plus_1 = S_218;
'd219:S_of_i_plus_1 = S_219;
'd220:S_of_i_plus_1 = S_220;
'd221:S_of_i_plus_1 = S_221;
'd222:S_of_i_plus_1 = S_222;
'd223:S_of_i_plus_1 = S_223;
'd224:S_of_i_plus_1 = S_224;
'd225:S_of_i_plus_1 = S_225;
'd226:S_of_i_plus_1 = S_226;
'd227:S_of_i_plus_1 = S_227;
'd228:S_of_i_plus_1 = S_228;
'd229:S_of_i_plus_1 = S_229;
'd230:S_of_i_plus_1 = S_230;
'd231:S_of_i_plus_1 = S_231;
'd232:S_of_i_plus_1 = S_232;
'd233:S_of_i_plus_1 = S_233;
'd234:S_of_i_plus_1 = S_234;
'd235:S_of_i_plus_1 = S_235;
'd236:S_of_i_plus_1 = S_236;
'd237:S_of_i_plus_1 = S_237;
'd238:S_of_i_plus_1 = S_238;
'd239:S_of_i_plus_1 = S_239;
'd240:S_of_i_plus_1 = S_240;
'd241:S_of_i_plus_1 = S_241;
'd242:S_of_i_plus_1 = S_242;
'd243:S_of_i_plus_1 = S_243;
'd244:S_of_i_plus_1 = S_244;
'd245:S_of_i_plus_1 = S_245;
'd246:S_of_i_plus_1 = S_246;
'd247:S_of_i_plus_1 = S_247;
'd248:S_of_i_plus_1 = S_248;
'd249:S_of_i_plus_1 = S_249;
'd250:S_of_i_plus_1 = S_250;
'd251:S_of_i_plus_1 = S_251;
'd252:S_of_i_plus_1 = S_252;
'd253:S_of_i_plus_1 = S_253;
'd254:S_of_i_plus_1 = S_254;
'd255:S_of_i_plus_1 = S_255;
default:S_of_i_plus_1 = S_256;
endcase
end
always @ (j or S_0 or S_1 or S_2 or S_3 or S_4 or S_5 or S_6 or S_7 or S_8 or S_9 or S_10 or S_11 or S_12 or S_13 or S_14 or S_15 or S_16 or S_17 or S_18 or S_19 or S_20 or S_21 or S_22 or S_23 or S_24 or S_25 or S_26 or S_27 or S_28 or S_29 or S_30 or S_31 or S_32 or S_33 or S_34 or S_35 or S_36 or S_37 or S_38 or S_39 or S_40 or S_41 or S_42 or S_43 or S_44 or S_45 or S_46 or S_47 or S_48 or S_49 or S_50 or S_51 or S_52 or S_53 or S_54 or S_55 or S_56 or S_57 or S_58 or S_59 or S_60 or S_61 or S_62 or S_63 or S_64 or S_65 or S_66 or S_67 or S_68 or S_69 or S_70 or S_71 or S_72 or S_73 or S_74 or S_75 or S_76 or S_77 or S_78 or S_79 or S_80 or S_81 or S_82 or S_83 or S_84 or S_85 or S_86 or S_87 or S_88 or S_89 or S_90 or S_91 or S_92 or S_93 or S_94 or S_95 or S_96 or S_97 or S_98 or S_99 or S_100 or S_101 or S_102 or S_103 or S_104 or S_105 or S_106 or S_107 or S_108 or S_109 or S_110 or S_111 or S_112 or S_113 or S_114 or S_115 or S_116 or S_117 or S_118 or S_119 or S_120 or S_121 or S_122 or S_123 or S_124 or S_125 or S_126 or S_127 or S_128 or S_129 or S_130 or S_131 or S_132 or S_133 or S_134 or S_135 or S_136 or S_137 or S_138 or S_139 or S_140 or S_141 or S_142 or S_143 or S_144 or S_145 or S_146 or S_147 or S_148 or S_149 or S_150 or S_151 or S_152 or S_153 or S_154 or S_155 or S_156 or S_157 or S_158 or S_159 or S_160 or S_161 or S_162 or S_163 or S_164 or S_165 or S_166 or S_167 or S_168 or S_169 or S_170 or S_171 or S_172 or S_173 or S_174 or S_175 or S_176 or S_177 or S_178 or S_179 or S_180 or S_181 or S_182 or S_183 or S_184 or S_185 or S_186 or S_187 or S_188 or S_189 or S_190 or S_191 or S_192 or S_193 or S_194 or S_195 or S_196 or S_197 or S_198 or S_199 or S_200 or S_201 or S_202 or S_203 or S_204 or S_205 or S_206 or S_207 or S_208 or S_209 or S_210 or S_211 or S_212 or S_213 or S_214 or S_215 or S_216 or S_217 or S_218 or S_219 or S_220 or S_221 or S_222 or S_223 or S_224 or S_225 or S_226 or S_227 or S_228 or S_229 or S_230 or S_231 or S_232 or S_233 or S_234 or S_235 or S_236 or S_237 or S_238 or S_239 or S_240 or S_241 or S_242 or S_243 or S_244 or S_245 or S_246 or S_247 or S_248 or S_249 or S_250 or S_251 or S_252 or S_253 or S_254 or S_255) begin
case (j)
'd0:S_of_j = S_0;
'd1:S_of_j = S_1;
'd2:S_of_j = S_2;
'd3:S_of_j = S_3;
'd4:S_of_j = S_4;
'd5:S_of_j = S_5;
'd6:S_of_j = S_6;
'd7:S_of_j = S_7;
'd8:S_of_j = S_8;
'd9:S_of_j = S_9;
'd10:S_of_j = S_10;
'd11:S_of_j = S_11;
'd12:S_of_j = S_12;
'd13:S_of_j = S_13;
'd14:S_of_j = S_14;
'd15:S_of_j = S_15;
'd16:S_of_j = S_16;
'd17:S_of_j = S_17;
'd18:S_of_j = S_18;
'd19:S_of_j = S_19;
'd20:S_of_j = S_20;
'd21:S_of_j = S_21;
'd22:S_of_j = S_22;
'd23:S_of_j = S_23;
'd24:S_of_j = S_24;
'd25:S_of_j = S_25;
'd26:S_of_j = S_26;
'd27:S_of_j = S_27;
'd28:S_of_j = S_28;
'd29:S_of_j = S_29;
'd30:S_of_j = S_30;
'd31:S_of_j = S_31;
'd32:S_of_j = S_32;
'd33:S_of_j = S_33;
'd34:S_of_j = S_34;
'd35:S_of_j = S_35;
'd36:S_of_j = S_36;
'd37:S_of_j = S_37;
'd38:S_of_j = S_38;
'd39:S_of_j = S_39;
'd40:S_of_j = S_40;
'd41:S_of_j = S_41;
'd42:S_of_j = S_42;
'd43:S_of_j = S_43;
'd44:S_of_j = S_44;
'd45:S_of_j = S_45;
'd46:S_of_j = S_46;
'd47:S_of_j = S_47;
'd48:S_of_j = S_48;
'd49:S_of_j = S_49;
'd50:S_of_j = S_50;
'd51:S_of_j = S_51;
'd52:S_of_j = S_52;
'd53:S_of_j = S_53;
'd54:S_of_j = S_54;
'd55:S_of_j = S_55;
'd56:S_of_j = S_56;
'd57:S_of_j = S_57;
'd58:S_of_j = S_58;
'd59:S_of_j = S_59;
'd60:S_of_j = S_60;
'd61:S_of_j = S_61;
'd62:S_of_j = S_62;
'd63:S_of_j = S_63;
'd64:S_of_j = S_64;
'd65:S_of_j = S_65;
'd66:S_of_j = S_66;
'd67:S_of_j = S_67;
'd68:S_of_j = S_68;
'd69:S_of_j = S_69;
'd70:S_of_j = S_70;
'd71:S_of_j = S_71;
'd72:S_of_j = S_72;
'd73:S_of_j = S_73;
'd74:S_of_j = S_74;
'd75:S_of_j = S_75;
'd76:S_of_j = S_76;
'd77:S_of_j = S_77;
'd78:S_of_j = S_78;
'd79:S_of_j = S_79;
'd80:S_of_j = S_80;
'd81:S_of_j = S_81;
'd82:S_of_j = S_82;
'd83:S_of_j = S_83;
'd84:S_of_j = S_84;
'd85:S_of_j = S_85;
'd86:S_of_j = S_86;
'd87:S_of_j = S_87;
'd88:S_of_j = S_88;
'd89:S_of_j = S_89;
'd90:S_of_j = S_90;
'd91:S_of_j = S_91;
'd92:S_of_j = S_92;
'd93:S_of_j = S_93;
'd94:S_of_j = S_94;
'd95:S_of_j = S_95;
'd96:S_of_j = S_96;
'd97:S_of_j = S_97;
'd98:S_of_j = S_98;
'd99:S_of_j = S_99;
'd100:S_of_j = S_100;
'd101:S_of_j = S_101;
'd102:S_of_j = S_102;
'd103:S_of_j = S_103;
'd104:S_of_j = S_104;
'd105:S_of_j = S_105;
'd106:S_of_j = S_106;
'd107:S_of_j = S_107;
'd108:S_of_j = S_108;
'd109:S_of_j = S_109;
'd110:S_of_j = S_110;
'd111:S_of_j = S_111;
'd112:S_of_j = S_112;
'd113:S_of_j = S_113;
'd114:S_of_j = S_114;
'd115:S_of_j = S_115;
'd116:S_of_j = S_116;
'd117:S_of_j = S_117;
'd118:S_of_j = S_118;
'd119:S_of_j = S_119;
'd120:S_of_j = S_120;
'd121:S_of_j = S_121;
'd122:S_of_j = S_122;
'd123:S_of_j = S_123;
'd124:S_of_j = S_124;
'd125:S_of_j = S_125;
'd126:S_of_j = S_126;
'd127:S_of_j = S_127;
'd128:S_of_j = S_128;
'd129:S_of_j = S_129;
'd130:S_of_j = S_130;
'd131:S_of_j = S_131;
'd132:S_of_j = S_132;
'd133:S_of_j = S_133;
'd134:S_of_j = S_134;
'd135:S_of_j = S_135;
'd136:S_of_j = S_136;
'd137:S_of_j = S_137;
'd138:S_of_j = S_138;
'd139:S_of_j = S_139;
'd140:S_of_j = S_140;
'd141:S_of_j = S_141;
'd142:S_of_j = S_142;
'd143:S_of_j = S_143;
'd144:S_of_j = S_144;
'd145:S_of_j = S_145;
'd146:S_of_j = S_146;
'd147:S_of_j = S_147;
'd148:S_of_j = S_148;
'd149:S_of_j = S_149;
'd150:S_of_j = S_150;
'd151:S_of_j = S_151;
'd152:S_of_j = S_152;
'd153:S_of_j = S_153;
'd154:S_of_j = S_154;
'd155:S_of_j = S_155;
'd156:S_of_j = S_156;
'd157:S_of_j = S_157;
'd158:S_of_j = S_158;
'd159:S_of_j = S_159;
'd160:S_of_j = S_160;
'd161:S_of_j = S_161;
'd162:S_of_j = S_162;
'd163:S_of_j = S_163;
'd164:S_of_j = S_164;
'd165:S_of_j = S_165;
'd166:S_of_j = S_166;
'd167:S_of_j = S_167;
'd168:S_of_j = S_168;
'd169:S_of_j = S_169;
'd170:S_of_j = S_170;
'd171:S_of_j = S_171;
'd172:S_of_j = S_172;
'd173:S_of_j = S_173;
'd174:S_of_j = S_174;
'd175:S_of_j = S_175;
'd176:S_of_j = S_176;
'd177:S_of_j = S_177;
'd178:S_of_j = S_178;
'd179:S_of_j = S_179;
'd180:S_of_j = S_180;
'd181:S_of_j = S_181;
'd182:S_of_j = S_182;
'd183:S_of_j = S_183;
'd184:S_of_j = S_184;
'd185:S_of_j = S_185;
'd186:S_of_j = S_186;
'd187:S_of_j = S_187;
'd188:S_of_j = S_188;
'd189:S_of_j = S_189;
'd190:S_of_j = S_190;
'd191:S_of_j = S_191;
'd192:S_of_j = S_192;
'd193:S_of_j = S_193;
'd194:S_of_j = S_194;
'd195:S_of_j = S_195;
'd196:S_of_j = S_196;
'd197:S_of_j = S_197;
'd198:S_of_j = S_198;
'd199:S_of_j = S_199;
'd200:S_of_j = S_200;
'd201:S_of_j = S_201;
'd202:S_of_j = S_202;
'd203:S_of_j = S_203;
'd204:S_of_j = S_204;
'd205:S_of_j = S_205;
'd206:S_of_j = S_206;
'd207:S_of_j = S_207;
'd208:S_of_j = S_208;
'd209:S_of_j = S_209;
'd210:S_of_j = S_210;
'd211:S_of_j = S_211;
'd212:S_of_j = S_212;
'd213:S_of_j = S_213;
'd214:S_of_j = S_214;
'd215:S_of_j = S_215;
'd216:S_of_j = S_216;
'd217:S_of_j = S_217;
'd218:S_of_j = S_218;
'd219:S_of_j = S_219;
'd220:S_of_j = S_220;
'd221:S_of_j = S_221;
'd222:S_of_j = S_222;
'd223:S_of_j = S_223;
'd224:S_of_j = S_224;
'd225:S_of_j = S_225;
'd226:S_of_j = S_226;
'd227:S_of_j = S_227;
'd228:S_of_j = S_228;
'd229:S_of_j = S_229;
'd230:S_of_j = S_230;
'd231:S_of_j = S_231;
'd232:S_of_j = S_232;
'd233:S_of_j = S_233;
'd234:S_of_j = S_234;
'd235:S_of_j = S_235;
'd236:S_of_j = S_236;
'd237:S_of_j = S_237;
'd238:S_of_j = S_238;
'd239:S_of_j = S_239;
'd240:S_of_j = S_240;
'd241:S_of_j = S_241;
'd242:S_of_j = S_242;
'd243:S_of_j = S_243;
'd244:S_of_j = S_244;
'd245:S_of_j = S_245;
'd246:S_of_j = S_246;
'd247:S_of_j = S_247;
'd248:S_of_j = S_248;
'd249:S_of_j = S_249;
'd250:S_of_j = S_250;
'd251:S_of_j = S_251;
'd252:S_of_j = S_252;
'd253:S_of_j = S_253;
'd254:S_of_j = S_254;
default:S_of_j = S_255;
endcase
end
always @ (i_mod_KEYSIZE or key_0 or key_1 or key_2 or key_3 or key_4 or key_5 or key_6) begin
case (i_mod_KEYSIZE)
'd0:key_of_i_mod_KEYSIZE = key_0;
'd1:key_of_i_mod_KEYSIZE = key_1;
'd2:key_of_i_mod_KEYSIZE = key_2;
'd3:key_of_i_mod_KEYSIZE = key_3;
'd4:key_of_i_mod_KEYSIZE = key_4;
'd5:key_of_i_mod_KEYSIZE = key_5;
default:key_of_i_mod_KEYSIZE = key_6;
endcase
end
always @ (i) begin
case (i)
'd0: i_mod_KEYSIZE = 0;
'd1: i_mod_KEYSIZE = 1;
'd2: i_mod_KEYSIZE = 2;
'd3: i_mod_KEYSIZE = 3;
'd4: i_mod_KEYSIZE = 4;
'd5: i_mod_KEYSIZE = 5;
'd6: i_mod_KEYSIZE = 6;
'd7: i_mod_KEYSIZE = 0;
'd8: i_mod_KEYSIZE = 1;
'd9: i_mod_KEYSIZE = 2;
'd10: i_mod_KEYSIZE = 3;
'd11: i_mod_KEYSIZE = 4;
'd12: i_mod_KEYSIZE = 5;
'd13: i_mod_KEYSIZE = 6;
'd14: i_mod_KEYSIZE = 0;
'd15: i_mod_KEYSIZE = 1;
'd16: i_mod_KEYSIZE = 2;
'd17: i_mod_KEYSIZE = 3;
'd18: i_mod_KEYSIZE = 4;
'd19: i_mod_KEYSIZE = 5;
'd20: i_mod_KEYSIZE = 6;
'd21: i_mod_KEYSIZE = 0;
'd22: i_mod_KEYSIZE = 1;
'd23: i_mod_KEYSIZE = 2;
'd24: i_mod_KEYSIZE = 3;
'd25: i_mod_KEYSIZE = 4;
'd26: i_mod_KEYSIZE = 5;
'd27: i_mod_KEYSIZE = 6;
'd28: i_mod_KEYSIZE = 0;
'd29: i_mod_KEYSIZE = 1;
'd30: i_mod_KEYSIZE = 2;
'd31: i_mod_KEYSIZE = 3;
'd32: i_mod_KEYSIZE = 4;
'd33: i_mod_KEYSIZE = 5;
'd34: i_mod_KEYSIZE = 6;
'd35: i_mod_KEYSIZE = 0;
'd36: i_mod_KEYSIZE = 1;
'd37: i_mod_KEYSIZE = 2;
'd38: i_mod_KEYSIZE = 3;
'd39: i_mod_KEYSIZE = 4;
'd40: i_mod_KEYSIZE = 5;
'd41: i_mod_KEYSIZE = 6;
'd42: i_mod_KEYSIZE = 0;
'd43: i_mod_KEYSIZE = 1;
'd44: i_mod_KEYSIZE = 2;
'd45: i_mod_KEYSIZE = 3;
'd46: i_mod_KEYSIZE = 4;
'd47: i_mod_KEYSIZE = 5;
'd48: i_mod_KEYSIZE = 6;
'd49: i_mod_KEYSIZE = 0;
'd50: i_mod_KEYSIZE = 1;
'd51: i_mod_KEYSIZE = 2;
'd52: i_mod_KEYSIZE = 3;
'd53: i_mod_KEYSIZE = 4;
'd54: i_mod_KEYSIZE = 5;
'd55: i_mod_KEYSIZE = 6;
'd56: i_mod_KEYSIZE = 0;
'd57: i_mod_KEYSIZE = 1;
'd58: i_mod_KEYSIZE = 2;
'd59: i_mod_KEYSIZE = 3;
'd60: i_mod_KEYSIZE = 4;
'd61: i_mod_KEYSIZE = 5;
'd62: i_mod_KEYSIZE = 6;
'd63: i_mod_KEYSIZE = 0;
'd64: i_mod_KEYSIZE = 1;
'd65: i_mod_KEYSIZE = 2;
'd66: i_mod_KEYSIZE = 3;
'd67: i_mod_KEYSIZE = 4;
'd68: i_mod_KEYSIZE = 5;
'd69: i_mod_KEYSIZE = 6;
'd70: i_mod_KEYSIZE = 0;
'd71: i_mod_KEYSIZE = 1;
'd72: i_mod_KEYSIZE = 2;
'd73: i_mod_KEYSIZE = 3;
'd74: i_mod_KEYSIZE = 4;
'd75: i_mod_KEYSIZE = 5;
'd76: i_mod_KEYSIZE = 6;
'd77: i_mod_KEYSIZE = 0;
'd78: i_mod_KEYSIZE = 1;
'd79: i_mod_KEYSIZE = 2;
'd80: i_mod_KEYSIZE = 3;
'd81: i_mod_KEYSIZE = 4;
'd82: i_mod_KEYSIZE = 5;
'd83: i_mod_KEYSIZE = 6;
'd84: i_mod_KEYSIZE = 0;
'd85: i_mod_KEYSIZE = 1;
'd86: i_mod_KEYSIZE = 2;
'd87: i_mod_KEYSIZE = 3;
'd88: i_mod_KEYSIZE = 4;
'd89: i_mod_KEYSIZE = 5;
'd90: i_mod_KEYSIZE = 6;
'd91: i_mod_KEYSIZE = 0;
'd92: i_mod_KEYSIZE = 1;
'd93: i_mod_KEYSIZE = 2;
'd94: i_mod_KEYSIZE = 3;
'd95: i_mod_KEYSIZE = 4;
'd96: i_mod_KEYSIZE = 5;
'd97: i_mod_KEYSIZE = 6;
'd98: i_mod_KEYSIZE = 0;
'd99: i_mod_KEYSIZE = 1;
'd100: i_mod_KEYSIZE = 2;
'd101: i_mod_KEYSIZE = 3;
'd102: i_mod_KEYSIZE = 4;
'd103: i_mod_KEYSIZE = 5;
'd104: i_mod_KEYSIZE = 6;
'd105: i_mod_KEYSIZE = 0;
'd106: i_mod_KEYSIZE = 1;
'd107: i_mod_KEYSIZE = 2;
'd108: i_mod_KEYSIZE = 3;
'd109: i_mod_KEYSIZE = 4;
'd110: i_mod_KEYSIZE = 5;
'd111: i_mod_KEYSIZE = 6;
'd112: i_mod_KEYSIZE = 0;
'd113: i_mod_KEYSIZE = 1;
'd114: i_mod_KEYSIZE = 2;
'd115: i_mod_KEYSIZE = 3;
'd116: i_mod_KEYSIZE = 4;
'd117: i_mod_KEYSIZE = 5;
'd118: i_mod_KEYSIZE = 6;
'd119: i_mod_KEYSIZE = 0;
'd120: i_mod_KEYSIZE = 1;
'd121: i_mod_KEYSIZE = 2;
'd122: i_mod_KEYSIZE = 3;
'd123: i_mod_KEYSIZE = 4;
'd124: i_mod_KEYSIZE = 5;
'd125: i_mod_KEYSIZE = 6;
'd126: i_mod_KEYSIZE = 0;
'd127: i_mod_KEYSIZE = 1;
'd128: i_mod_KEYSIZE = 2;
'd129: i_mod_KEYSIZE = 3;
'd130: i_mod_KEYSIZE = 4;
'd131: i_mod_KEYSIZE = 5;
'd132: i_mod_KEYSIZE = 6;
'd133: i_mod_KEYSIZE = 0;
'd134: i_mod_KEYSIZE = 1;
'd135: i_mod_KEYSIZE = 2;
'd136: i_mod_KEYSIZE = 3;
'd137: i_mod_KEYSIZE = 4;
'd138: i_mod_KEYSIZE = 5;
'd139: i_mod_KEYSIZE = 6;
'd140: i_mod_KEYSIZE = 0;
'd141: i_mod_KEYSIZE = 1;
'd142: i_mod_KEYSIZE = 2;
'd143: i_mod_KEYSIZE = 3;
'd144: i_mod_KEYSIZE = 4;
'd145: i_mod_KEYSIZE = 5;
'd146: i_mod_KEYSIZE = 6;
'd147: i_mod_KEYSIZE = 0;
'd148: i_mod_KEYSIZE = 1;
'd149: i_mod_KEYSIZE = 2;
'd150: i_mod_KEYSIZE = 3;
'd151: i_mod_KEYSIZE = 4;
'd152: i_mod_KEYSIZE = 5;
'd153: i_mod_KEYSIZE = 6;
'd154: i_mod_KEYSIZE = 0;
'd155: i_mod_KEYSIZE = 1;
'd156: i_mod_KEYSIZE = 2;
'd157: i_mod_KEYSIZE = 3;
'd158: i_mod_KEYSIZE = 4;
'd159: i_mod_KEYSIZE = 5;
'd160: i_mod_KEYSIZE = 6;
'd161: i_mod_KEYSIZE = 0;
'd162: i_mod_KEYSIZE = 1;
'd163: i_mod_KEYSIZE = 2;
'd164: i_mod_KEYSIZE = 3;
'd165: i_mod_KEYSIZE = 4;
'd166: i_mod_KEYSIZE = 5;
'd167: i_mod_KEYSIZE = 6;
'd168: i_mod_KEYSIZE = 0;
'd169: i_mod_KEYSIZE = 1;
'd170: i_mod_KEYSIZE = 2;
'd171: i_mod_KEYSIZE = 3;
'd172: i_mod_KEYSIZE = 4;
'd173: i_mod_KEYSIZE = 5;
'd174: i_mod_KEYSIZE = 6;
'd175: i_mod_KEYSIZE = 0;
'd176: i_mod_KEYSIZE = 1;
'd177: i_mod_KEYSIZE = 2;
'd178: i_mod_KEYSIZE = 3;
'd179: i_mod_KEYSIZE = 4;
'd180: i_mod_KEYSIZE = 5;
'd181: i_mod_KEYSIZE = 6;
'd182: i_mod_KEYSIZE = 0;
'd183: i_mod_KEYSIZE = 1;
'd184: i_mod_KEYSIZE = 2;
'd185: i_mod_KEYSIZE = 3;
'd186: i_mod_KEYSIZE = 4;
'd187: i_mod_KEYSIZE = 5;
'd188: i_mod_KEYSIZE = 6;
'd189: i_mod_KEYSIZE = 0;
'd190: i_mod_KEYSIZE = 1;
'd191: i_mod_KEYSIZE = 2;
'd192: i_mod_KEYSIZE = 3;
'd193: i_mod_KEYSIZE = 4;
'd194: i_mod_KEYSIZE = 5;
'd195: i_mod_KEYSIZE = 6;
'd196: i_mod_KEYSIZE = 0;
'd197: i_mod_KEYSIZE = 1;
'd198: i_mod_KEYSIZE = 2;
'd199: i_mod_KEYSIZE = 3;
'd200: i_mod_KEYSIZE = 4;
'd201: i_mod_KEYSIZE = 5;
'd202: i_mod_KEYSIZE = 6;
'd203: i_mod_KEYSIZE = 0;
'd204: i_mod_KEYSIZE = 1;
'd205: i_mod_KEYSIZE = 2;
'd206: i_mod_KEYSIZE = 3;
'd207: i_mod_KEYSIZE = 4;
'd208: i_mod_KEYSIZE = 5;
'd209: i_mod_KEYSIZE = 6;
'd210: i_mod_KEYSIZE = 0;
'd211: i_mod_KEYSIZE = 1;
'd212: i_mod_KEYSIZE = 2;
'd213: i_mod_KEYSIZE = 3;
'd214: i_mod_KEYSIZE = 4;
'd215: i_mod_KEYSIZE = 5;
'd216: i_mod_KEYSIZE = 6;
'd217: i_mod_KEYSIZE = 0;
'd218: i_mod_KEYSIZE = 1;
'd219: i_mod_KEYSIZE = 2;
'd220: i_mod_KEYSIZE = 3;
'd221: i_mod_KEYSIZE = 4;
'd222: i_mod_KEYSIZE = 5;
'd223: i_mod_KEYSIZE = 6;
'd224: i_mod_KEYSIZE = 0;
'd225: i_mod_KEYSIZE = 1;
'd226: i_mod_KEYSIZE = 2;
'd227: i_mod_KEYSIZE = 3;
'd228: i_mod_KEYSIZE = 4;
'd229: i_mod_KEYSIZE = 5;
'd230: i_mod_KEYSIZE = 6;
'd231: i_mod_KEYSIZE = 0;
'd232: i_mod_KEYSIZE = 1;
'd233: i_mod_KEYSIZE = 2;
'd234: i_mod_KEYSIZE = 3;
'd235: i_mod_KEYSIZE = 4;
'd236: i_mod_KEYSIZE = 5;
'd237: i_mod_KEYSIZE = 6;
'd238: i_mod_KEYSIZE = 0;
'd239: i_mod_KEYSIZE = 1;
'd240: i_mod_KEYSIZE = 2;
'd241: i_mod_KEYSIZE = 3;
'd242: i_mod_KEYSIZE = 4;
'd243: i_mod_KEYSIZE = 5;
'd244: i_mod_KEYSIZE = 6;
'd245: i_mod_KEYSIZE = 0;
'd246: i_mod_KEYSIZE = 1;
'd247: i_mod_KEYSIZE = 2;
'd248: i_mod_KEYSIZE = 3;
'd249: i_mod_KEYSIZE = 4;
'd250: i_mod_KEYSIZE = 5;
'd251: i_mod_KEYSIZE = 6;
'd252: i_mod_KEYSIZE = 0;
'd253: i_mod_KEYSIZE = 1;
'd254: i_mod_KEYSIZE = 2;
'd255: i_mod_KEYSIZE = 3;
endcase
end
assign S_of_i_plus_S_of_j = S_of_i + S_of_j;
always @ (posedge clk or posedge rst) begin
if (rst) begin
i <= 8'h0;
KSState <= 4'h0;
output_ready <= 0;
j <= 0;
end else begin
prev_i <= i;
prev_S_of_j <= S_of_j;
case (KSState)
4'h0: begin // KSS_KEYREAD state: Read key from input
if (i == 7) begin
KSState <= 4'h1;
i<=8'h00;
end else begin
i <= i+1;
// in place of:
// key[i] <= password_input;
case (i)
'd0:key_0 <= password_input;
'd1:key_1 <= password_input;
'd2:key_2 <= password_input;
'd3:key_3 <= password_input;
'd4:key_4 <= password_input;
'd5:key_5 <= password_input;
default:key_6 <= password_input;
endcase
// $display ("rc4: key[%d] = %08X",i,password_input);
end
end
// for i from 0 to 255
// S[i] := i
// endfor
4'h1: begin // KSS_KEYSCHED1: Increment counter for S initialization
// in place of S[i] <= i;
case (i)
'd0:S_0 <= i;
'd1:S_1 <= i;
'd2:S_2 <= i;
'd3:S_3 <= i;
'd4:S_4 <= i;
'd5:S_5 <= i;
'd6:S_6 <= i;
'd7:S_7 <= i;
'd8:S_8 <= i;
'd9:S_9 <= i;
'd10:S_10 <= i;
'd11:S_11 <= i;
'd12:S_12 <= i;
'd13:S_13 <= i;
'd14:S_14 <= i;
'd15:S_15 <= i;
'd16:S_16 <= i;
'd17:S_17 <= i;
'd18:S_18 <= i;
'd19:S_19 <= i;
'd20:S_20 <= i;
'd21:S_21 <= i;
'd22:S_22 <= i;
'd23:S_23 <= i;
'd24:S_24 <= i;
'd25:S_25 <= i;
'd26:S_26 <= i;
'd27:S_27 <= i;
'd28:S_28 <= i;
'd29:S_29 <= i;
'd30:S_30 <= i;
'd31:S_31 <= i;
'd32:S_32 <= i;
'd33:S_33 <= i;
'd34:S_34 <= i;
'd35:S_35 <= i;
'd36:S_36 <= i;
'd37:S_37 <= i;
'd38:S_38 <= i;
'd39:S_39 <= i;
'd40:S_40 <= i;
'd41:S_41 <= i;
'd42:S_42 <= i;
'd43:S_43 <= i;
'd44:S_44 <= i;
'd45:S_45 <= i;
'd46:S_46 <= i;
'd47:S_47 <= i;
'd48:S_48 <= i;
'd49:S_49 <= i;
'd50:S_50 <= i;
'd51:S_51 <= i;
'd52:S_52 <= i;
'd53:S_53 <= i;
'd54:S_54 <= i;
'd55:S_55 <= i;
'd56:S_56 <= i;
'd57:S_57 <= i;
'd58:S_58 <= i;
'd59:S_59 <= i;
'd60:S_60 <= i;
'd61:S_61 <= i;
'd62:S_62 <= i;
'd63:S_63 <= i;
'd64:S_64 <= i;
'd65:S_65 <= i;
'd66:S_66 <= i;
'd67:S_67 <= i;
'd68:S_68 <= i;
'd69:S_69 <= i;
'd70:S_70 <= i;
'd71:S_71 <= i;
'd72:S_72 <= i;
'd73:S_73 <= i;
'd74:S_74 <= i;
'd75:S_75 <= i;
'd76:S_76 <= i;
'd77:S_77 <= i;
'd78:S_78 <= i;
'd79:S_79 <= i;
'd80:S_80 <= i;
'd81:S_81 <= i;
'd82:S_82 <= i;
'd83:S_83 <= i;
'd84:S_84 <= i;
'd85:S_85 <= i;
'd86:S_86 <= i;
'd87:S_87 <= i;
'd88:S_88 <= i;
'd89:S_89 <= i;
'd90:S_90 <= i;
'd91:S_91 <= i;
'd92:S_92 <= i;
'd93:S_93 <= i;
'd94:S_94 <= i;
'd95:S_95 <= i;
'd96:S_96 <= i;
'd97:S_97 <= i;
'd98:S_98 <= i;
'd99:S_99 <= i;
'd100:S_100 <= i;
'd101:S_101 <= i;
'd102:S_102 <= i;
'd103:S_103 <= i;
'd104:S_104 <= i;
'd105:S_105 <= i;
'd106:S_106 <= i;
'd107:S_107 <= i;
'd108:S_108 <= i;
'd109:S_109 <= i;
'd110:S_110 <= i;
'd111:S_111 <= i;
'd112:S_112 <= i;
'd113:S_113 <= i;
'd114:S_114 <= i;
'd115:S_115 <= i;
'd116:S_116 <= i;
'd117:S_117 <= i;
'd118:S_118 <= i;
'd119:S_119 <= i;
'd120:S_120 <= i;
'd121:S_121 <= i;
'd122:S_122 <= i;
'd123:S_123 <= i;
'd124:S_124 <= i;
'd125:S_125 <= i;
'd126:S_126 <= i;
'd127:S_127 <= i;
'd128:S_128 <= i;
'd129:S_129 <= i;
'd130:S_130 <= i;
'd131:S_131 <= i;
'd132:S_132 <= i;
'd133:S_133 <= i;
'd134:S_134 <= i;
'd135:S_135 <= i;
'd136:S_136 <= i;
'd137:S_137 <= i;
'd138:S_138 <= i;
'd139:S_139 <= i;
'd140:S_140 <= i;
'd141:S_141 <= i;
'd142:S_142 <= i;
'd143:S_143 <= i;
'd144:S_144 <= i;
'd145:S_145 <= i;
'd146:S_146 <= i;
'd147:S_147 <= i;
'd148:S_148 <= i;
'd149:S_149 <= i;
'd150:S_150 <= i;
'd151:S_151 <= i;
'd152:S_152 <= i;
'd153:S_153 <= i;
'd154:S_154 <= i;
'd155:S_155 <= i;
'd156:S_156 <= i;
'd157:S_157 <= i;
'd158:S_158 <= i;
'd159:S_159 <= i;
'd160:S_160 <= i;
'd161:S_161 <= i;
'd162:S_162 <= i;
'd163:S_163 <= i;
'd164:S_164 <= i;
'd165:S_165 <= i;
'd166:S_166 <= i;
'd167:S_167 <= i;
'd168:S_168 <= i;
'd169:S_169 <= i;
'd170:S_170 <= i;
'd171:S_171 <= i;
'd172:S_172 <= i;
'd173:S_173 <= i;
'd174:S_174 <= i;
'd175:S_175 <= i;
'd176:S_176 <= i;
'd177:S_177 <= i;
'd178:S_178 <= i;
'd179:S_179 <= i;
'd180:S_180 <= i;
'd181:S_181 <= i;
'd182:S_182 <= i;
'd183:S_183 <= i;
'd184:S_184 <= i;
'd185:S_185 <= i;
'd186:S_186 <= i;
'd187:S_187 <= i;
'd188:S_188 <= i;
'd189:S_189 <= i;
'd190:S_190 <= i;
'd191:S_191 <= i;
'd192:S_192 <= i;
'd193:S_193 <= i;
'd194:S_194 <= i;
'd195:S_195 <= i;
'd196:S_196 <= i;
'd197:S_197 <= i;
'd198:S_198 <= i;
'd199:S_199 <= i;
'd200:S_200 <= i;
'd201:S_201 <= i;
'd202:S_202 <= i;
'd203:S_203 <= i;
'd204:S_204 <= i;
'd205:S_205 <= i;
'd206:S_206 <= i;
'd207:S_207 <= i;
'd208:S_208 <= i;
'd209:S_209 <= i;
'd210:S_210 <= i;
'd211:S_211 <= i;
'd212:S_212 <= i;
'd213:S_213 <= i;
'd214:S_214 <= i;
'd215:S_215 <= i;
'd216:S_216 <= i;
'd217:S_217 <= i;
'd218:S_218 <= i;
'd219:S_219 <= i;
'd220:S_220 <= i;
'd221:S_221 <= i;
'd222:S_222 <= i;
'd223:S_223 <= i;
'd224:S_224 <= i;
'd225:S_225 <= i;
'd226:S_226 <= i;
'd227:S_227 <= i;
'd228:S_228 <= i;
'd229:S_229 <= i;
'd230:S_230 <= i;
'd231:S_231 <= i;
'd232:S_232 <= i;
'd233:S_233 <= i;
'd234:S_234 <= i;
'd235:S_235 <= i;
'd236:S_236 <= i;
'd237:S_237 <= i;
'd238:S_238 <= i;
'd239:S_239 <= i;
'd240:S_240 <= i;
'd241:S_241 <= i;
'd242:S_242 <= i;
'd243:S_243 <= i;
'd244:S_244 <= i;
'd245:S_245 <= i;
'd246:S_246 <= i;
'd247:S_247 <= i;
'd248:S_248 <= i;
'd249:S_249 <= i;
'd250:S_250 <= i;
'd251:S_251 <= i;
'd252:S_252 <= i;
'd253:S_253 <= i;
'd254:S_254 <= i;
'd255:S_255 <= i;
default:S_256 <= i;
endcase
if (i == 8'hFF) begin
KSState <= 4'h2;
i <= 8'h00;
end else begin
i <= i +1;
end
end
// j := 0
// for i from 0 to 255
// j := (j + S[i] + key[i mod keylength]) mod 256
// swap values of S[i] and S[j]
// endfor
4'h2: begin // KSS_KEYSCHED2: Initialize S array
// in place of:
// j <= (j + S[i] + key[i % `KEY_SIZE]);
j <= (j + S_of_i + key_of_i_mod_KEYSIZE);
KSState <= 4'h3;
end
4'h3: begin // KSS_KEYSCHED3: S array permutation
// in place of:
// S[i]<=S[j]; , see KSS_SWAP_REGS*
// in place of:
// S[j]<=S[i];
case (j)
'd0:S_0 <= S_of_i;
'd1:S_1 <= S_of_i;
'd2:S_2 <= S_of_i;
'd3:S_3 <= S_of_i;
'd4:S_4 <= S_of_i;
'd5:S_5 <= S_of_i;
'd6:S_6 <= S_of_i;
'd7:S_7 <= S_of_i;
'd8:S_8 <= S_of_i;
'd9:S_9 <= S_of_i;
'd10:S_10 <= S_of_i;
'd11:S_11 <= S_of_i;
'd12:S_12 <= S_of_i;
'd13:S_13 <= S_of_i;
'd14:S_14 <= S_of_i;
'd15:S_15 <= S_of_i;
'd16:S_16 <= S_of_i;
'd17:S_17 <= S_of_i;
'd18:S_18 <= S_of_i;
'd19:S_19 <= S_of_i;
'd20:S_20 <= S_of_i;
'd21:S_21 <= S_of_i;
'd22:S_22 <= S_of_i;
'd23:S_23 <= S_of_i;
'd24:S_24 <= S_of_i;
'd25:S_25 <= S_of_i;
'd26:S_26 <= S_of_i;
'd27:S_27 <= S_of_i;
'd28:S_28 <= S_of_i;
'd29:S_29 <= S_of_i;
'd30:S_30 <= S_of_i;
'd31:S_31 <= S_of_i;
'd32:S_32 <= S_of_i;
'd33:S_33 <= S_of_i;
'd34:S_34 <= S_of_i;
'd35:S_35 <= S_of_i;
'd36:S_36 <= S_of_i;
'd37:S_37 <= S_of_i;
'd38:S_38 <= S_of_i;
'd39:S_39 <= S_of_i;
'd40:S_40 <= S_of_i;
'd41:S_41 <= S_of_i;
'd42:S_42 <= S_of_i;
'd43:S_43 <= S_of_i;
'd44:S_44 <= S_of_i;
'd45:S_45 <= S_of_i;
'd46:S_46 <= S_of_i;
'd47:S_47 <= S_of_i;
'd48:S_48 <= S_of_i;
'd49:S_49 <= S_of_i;
'd50:S_50 <= S_of_i;
'd51:S_51 <= S_of_i;
'd52:S_52 <= S_of_i;
'd53:S_53 <= S_of_i;
'd54:S_54 <= S_of_i;
'd55:S_55 <= S_of_i;
'd56:S_56 <= S_of_i;
'd57:S_57 <= S_of_i;
'd58:S_58 <= S_of_i;
'd59:S_59 <= S_of_i;
'd60:S_60 <= S_of_i;
'd61:S_61 <= S_of_i;
'd62:S_62 <= S_of_i;
'd63:S_63 <= S_of_i;
'd64:S_64 <= S_of_i;
'd65:S_65 <= S_of_i;
'd66:S_66 <= S_of_i;
'd67:S_67 <= S_of_i;
'd68:S_68 <= S_of_i;
'd69:S_69 <= S_of_i;
'd70:S_70 <= S_of_i;
'd71:S_71 <= S_of_i;
'd72:S_72 <= S_of_i;
'd73:S_73 <= S_of_i;
'd74:S_74 <= S_of_i;
'd75:S_75 <= S_of_i;
'd76:S_76 <= S_of_i;
'd77:S_77 <= S_of_i;
'd78:S_78 <= S_of_i;
'd79:S_79 <= S_of_i;
'd80:S_80 <= S_of_i;
'd81:S_81 <= S_of_i;
'd82:S_82 <= S_of_i;
'd83:S_83 <= S_of_i;
'd84:S_84 <= S_of_i;
'd85:S_85 <= S_of_i;
'd86:S_86 <= S_of_i;
'd87:S_87 <= S_of_i;
'd88:S_88 <= S_of_i;
'd89:S_89 <= S_of_i;
'd90:S_90 <= S_of_i;
'd91:S_91 <= S_of_i;
'd92:S_92 <= S_of_i;
'd93:S_93 <= S_of_i;
'd94:S_94 <= S_of_i;
'd95:S_95 <= S_of_i;
'd96:S_96 <= S_of_i;
'd97:S_97 <= S_of_i;
'd98:S_98 <= S_of_i;
'd99:S_99 <= S_of_i;
'd100:S_100 <= S_of_i;
'd101:S_101 <= S_of_i;
'd102:S_102 <= S_of_i;
'd103:S_103 <= S_of_i;
'd104:S_104 <= S_of_i;
'd105:S_105 <= S_of_i;
'd106:S_106 <= S_of_i;
'd107:S_107 <= S_of_i;
'd108:S_108 <= S_of_i;
'd109:S_109 <= S_of_i;
'd110:S_110 <= S_of_i;
'd111:S_111 <= S_of_i;
'd112:S_112 <= S_of_i;
'd113:S_113 <= S_of_i;
'd114:S_114 <= S_of_i;
'd115:S_115 <= S_of_i;
'd116:S_116 <= S_of_i;
'd117:S_117 <= S_of_i;
'd118:S_118 <= S_of_i;
'd119:S_119 <= S_of_i;
'd120:S_120 <= S_of_i;
'd121:S_121 <= S_of_i;
'd122:S_122 <= S_of_i;
'd123:S_123 <= S_of_i;
'd124:S_124 <= S_of_i;
'd125:S_125 <= S_of_i;
'd126:S_126 <= S_of_i;
'd127:S_127 <= S_of_i;
'd128:S_128 <= S_of_i;
'd129:S_129 <= S_of_i;
'd130:S_130 <= S_of_i;
'd131:S_131 <= S_of_i;
'd132:S_132 <= S_of_i;
'd133:S_133 <= S_of_i;
'd134:S_134 <= S_of_i;
'd135:S_135 <= S_of_i;
'd136:S_136 <= S_of_i;
'd137:S_137 <= S_of_i;
'd138:S_138 <= S_of_i;
'd139:S_139 <= S_of_i;
'd140:S_140 <= S_of_i;
'd141:S_141 <= S_of_i;
'd142:S_142 <= S_of_i;
'd143:S_143 <= S_of_i;
'd144:S_144 <= S_of_i;
'd145:S_145 <= S_of_i;
'd146:S_146 <= S_of_i;
'd147:S_147 <= S_of_i;
'd148:S_148 <= S_of_i;
'd149:S_149 <= S_of_i;
'd150:S_150 <= S_of_i;
'd151:S_151 <= S_of_i;
'd152:S_152 <= S_of_i;
'd153:S_153 <= S_of_i;
'd154:S_154 <= S_of_i;
'd155:S_155 <= S_of_i;
'd156:S_156 <= S_of_i;
'd157:S_157 <= S_of_i;
'd158:S_158 <= S_of_i;
'd159:S_159 <= S_of_i;
'd160:S_160 <= S_of_i;
'd161:S_161 <= S_of_i;
'd162:S_162 <= S_of_i;
'd163:S_163 <= S_of_i;
'd164:S_164 <= S_of_i;
'd165:S_165 <= S_of_i;
'd166:S_166 <= S_of_i;
'd167:S_167 <= S_of_i;
'd168:S_168 <= S_of_i;
'd169:S_169 <= S_of_i;
'd170:S_170 <= S_of_i;
'd171:S_171 <= S_of_i;
'd172:S_172 <= S_of_i;
'd173:S_173 <= S_of_i;
'd174:S_174 <= S_of_i;
'd175:S_175 <= S_of_i;
'd176:S_176 <= S_of_i;
'd177:S_177 <= S_of_i;
'd178:S_178 <= S_of_i;
'd179:S_179 <= S_of_i;
'd180:S_180 <= S_of_i;
'd181:S_181 <= S_of_i;
'd182:S_182 <= S_of_i;
'd183:S_183 <= S_of_i;
'd184:S_184 <= S_of_i;
'd185:S_185 <= S_of_i;
'd186:S_186 <= S_of_i;
'd187:S_187 <= S_of_i;
'd188:S_188 <= S_of_i;
'd189:S_189 <= S_of_i;
'd190:S_190 <= S_of_i;
'd191:S_191 <= S_of_i;
'd192:S_192 <= S_of_i;
'd193:S_193 <= S_of_i;
'd194:S_194 <= S_of_i;
'd195:S_195 <= S_of_i;
'd196:S_196 <= S_of_i;
'd197:S_197 <= S_of_i;
'd198:S_198 <= S_of_i;
'd199:S_199 <= S_of_i;
'd200:S_200 <= S_of_i;
'd201:S_201 <= S_of_i;
'd202:S_202 <= S_of_i;
'd203:S_203 <= S_of_i;
'd204:S_204 <= S_of_i;
'd205:S_205 <= S_of_i;
'd206:S_206 <= S_of_i;
'd207:S_207 <= S_of_i;
'd208:S_208 <= S_of_i;
'd209:S_209 <= S_of_i;
'd210:S_210 <= S_of_i;
'd211:S_211 <= S_of_i;
'd212:S_212 <= S_of_i;
'd213:S_213 <= S_of_i;
'd214:S_214 <= S_of_i;
'd215:S_215 <= S_of_i;
'd216:S_216 <= S_of_i;
'd217:S_217 <= S_of_i;
'd218:S_218 <= S_of_i;
'd219:S_219 <= S_of_i;
'd220:S_220 <= S_of_i;
'd221:S_221 <= S_of_i;
'd222:S_222 <= S_of_i;
'd223:S_223 <= S_of_i;
'd224:S_224 <= S_of_i;
'd225:S_225 <= S_of_i;
'd226:S_226 <= S_of_i;
'd227:S_227 <= S_of_i;
'd228:S_228 <= S_of_i;
'd229:S_229 <= S_of_i;
'd230:S_230 <= S_of_i;
'd231:S_231 <= S_of_i;
'd232:S_232 <= S_of_i;
'd233:S_233 <= S_of_i;
'd234:S_234 <= S_of_i;
'd235:S_235 <= S_of_i;
'd236:S_236 <= S_of_i;
'd237:S_237 <= S_of_i;
'd238:S_238 <= S_of_i;
'd239:S_239 <= S_of_i;
'd240:S_240 <= S_of_i;
'd241:S_241 <= S_of_i;
'd242:S_242 <= S_of_i;
'd243:S_243 <= S_of_i;
'd244:S_244 <= S_of_i;
'd245:S_245 <= S_of_i;
'd246:S_246 <= S_of_i;
'd247:S_247 <= S_of_i;
'd248:S_248 <= S_of_i;
'd249:S_249 <= S_of_i;
'd250:S_250 <= S_of_i;
'd251:S_251 <= S_of_i;
'd252:S_252 <= S_of_i;
'd253:S_253 <= S_of_i;
'd254:S_254 <= S_of_i;
'd255:S_255 <= S_of_i;
default:S_256 <= S_of_i;
endcase
if (i == 8'hFF) begin
KSState <= 4'h7;
i <= 8'h01;
j <= S_1;
discardCount <= 11'h0;
output_ready <= 0; // K not valid yet
end else begin
i <= i + 1;
KSState <= 4'h5;
end
end
// i := 0
// j := 0
// while GeneratingOutput:
// i := (i + 1) mod 256
// j := (j + S[i]) mod 256
// swap values of S[i] and S[j]
// K := S[(S[i] + S[j]) mod 256]
// output K
// endwhile
4'h4: begin
// in place of:
// S[i] <= S[j], see KSS_SWAP_REGS*
// in place of:
// S[j] <= S[i]; // We can do this because of verilog.
case (j)
'd0:S_0 <= S_of_i;
'd1:S_1 <= S_of_i;
'd2:S_2 <= S_of_i;
'd3:S_3 <= S_of_i;
'd4:S_4 <= S_of_i;
'd5:S_5 <= S_of_i;
'd6:S_6 <= S_of_i;
'd7:S_7 <= S_of_i;
'd8:S_8 <= S_of_i;
'd9:S_9 <= S_of_i;
'd10:S_10 <= S_of_i;
'd11:S_11 <= S_of_i;
'd12:S_12 <= S_of_i;
'd13:S_13 <= S_of_i;
'd14:S_14 <= S_of_i;
'd15:S_15 <= S_of_i;
'd16:S_16 <= S_of_i;
'd17:S_17 <= S_of_i;
'd18:S_18 <= S_of_i;
'd19:S_19 <= S_of_i;
'd20:S_20 <= S_of_i;
'd21:S_21 <= S_of_i;
'd22:S_22 <= S_of_i;
'd23:S_23 <= S_of_i;
'd24:S_24 <= S_of_i;
'd25:S_25 <= S_of_i;
'd26:S_26 <= S_of_i;
'd27:S_27 <= S_of_i;
'd28:S_28 <= S_of_i;
'd29:S_29 <= S_of_i;
'd30:S_30 <= S_of_i;
'd31:S_31 <= S_of_i;
'd32:S_32 <= S_of_i;
'd33:S_33 <= S_of_i;
'd34:S_34 <= S_of_i;
'd35:S_35 <= S_of_i;
'd36:S_36 <= S_of_i;
'd37:S_37 <= S_of_i;
'd38:S_38 <= S_of_i;
'd39:S_39 <= S_of_i;
'd40:S_40 <= S_of_i;
'd41:S_41 <= S_of_i;
'd42:S_42 <= S_of_i;
'd43:S_43 <= S_of_i;
'd44:S_44 <= S_of_i;
'd45:S_45 <= S_of_i;
'd46:S_46 <= S_of_i;
'd47:S_47 <= S_of_i;
'd48:S_48 <= S_of_i;
'd49:S_49 <= S_of_i;
'd50:S_50 <= S_of_i;
'd51:S_51 <= S_of_i;
'd52:S_52 <= S_of_i;
'd53:S_53 <= S_of_i;
'd54:S_54 <= S_of_i;
'd55:S_55 <= S_of_i;
'd56:S_56 <= S_of_i;
'd57:S_57 <= S_of_i;
'd58:S_58 <= S_of_i;
'd59:S_59 <= S_of_i;
'd60:S_60 <= S_of_i;
'd61:S_61 <= S_of_i;
'd62:S_62 <= S_of_i;
'd63:S_63 <= S_of_i;
'd64:S_64 <= S_of_i;
'd65:S_65 <= S_of_i;
'd66:S_66 <= S_of_i;
'd67:S_67 <= S_of_i;
'd68:S_68 <= S_of_i;
'd69:S_69 <= S_of_i;
'd70:S_70 <= S_of_i;
'd71:S_71 <= S_of_i;
'd72:S_72 <= S_of_i;
'd73:S_73 <= S_of_i;
'd74:S_74 <= S_of_i;
'd75:S_75 <= S_of_i;
'd76:S_76 <= S_of_i;
'd77:S_77 <= S_of_i;
'd78:S_78 <= S_of_i;
'd79:S_79 <= S_of_i;
'd80:S_80 <= S_of_i;
'd81:S_81 <= S_of_i;
'd82:S_82 <= S_of_i;
'd83:S_83 <= S_of_i;
'd84:S_84 <= S_of_i;
'd85:S_85 <= S_of_i;
'd86:S_86 <= S_of_i;
'd87:S_87 <= S_of_i;
'd88:S_88 <= S_of_i;
'd89:S_89 <= S_of_i;
'd90:S_90 <= S_of_i;
'd91:S_91 <= S_of_i;
'd92:S_92 <= S_of_i;
'd93:S_93 <= S_of_i;
'd94:S_94 <= S_of_i;
'd95:S_95 <= S_of_i;
'd96:S_96 <= S_of_i;
'd97:S_97 <= S_of_i;
'd98:S_98 <= S_of_i;
'd99:S_99 <= S_of_i;
'd100:S_100 <= S_of_i;
'd101:S_101 <= S_of_i;
'd102:S_102 <= S_of_i;
'd103:S_103 <= S_of_i;
'd104:S_104 <= S_of_i;
'd105:S_105 <= S_of_i;
'd106:S_106 <= S_of_i;
'd107:S_107 <= S_of_i;
'd108:S_108 <= S_of_i;
'd109:S_109 <= S_of_i;
'd110:S_110 <= S_of_i;
'd111:S_111 <= S_of_i;
'd112:S_112 <= S_of_i;
'd113:S_113 <= S_of_i;
'd114:S_114 <= S_of_i;
'd115:S_115 <= S_of_i;
'd116:S_116 <= S_of_i;
'd117:S_117 <= S_of_i;
'd118:S_118 <= S_of_i;
'd119:S_119 <= S_of_i;
'd120:S_120 <= S_of_i;
'd121:S_121 <= S_of_i;
'd122:S_122 <= S_of_i;
'd123:S_123 <= S_of_i;
'd124:S_124 <= S_of_i;
'd125:S_125 <= S_of_i;
'd126:S_126 <= S_of_i;
'd127:S_127 <= S_of_i;
'd128:S_128 <= S_of_i;
'd129:S_129 <= S_of_i;
'd130:S_130 <= S_of_i;
'd131:S_131 <= S_of_i;
'd132:S_132 <= S_of_i;
'd133:S_133 <= S_of_i;
'd134:S_134 <= S_of_i;
'd135:S_135 <= S_of_i;
'd136:S_136 <= S_of_i;
'd137:S_137 <= S_of_i;
'd138:S_138 <= S_of_i;
'd139:S_139 <= S_of_i;
'd140:S_140 <= S_of_i;
'd141:S_141 <= S_of_i;
'd142:S_142 <= S_of_i;
'd143:S_143 <= S_of_i;
'd144:S_144 <= S_of_i;
'd145:S_145 <= S_of_i;
'd146:S_146 <= S_of_i;
'd147:S_147 <= S_of_i;
'd148:S_148 <= S_of_i;
'd149:S_149 <= S_of_i;
'd150:S_150 <= S_of_i;
'd151:S_151 <= S_of_i;
'd152:S_152 <= S_of_i;
'd153:S_153 <= S_of_i;
'd154:S_154 <= S_of_i;
'd155:S_155 <= S_of_i;
'd156:S_156 <= S_of_i;
'd157:S_157 <= S_of_i;
'd158:S_158 <= S_of_i;
'd159:S_159 <= S_of_i;
'd160:S_160 <= S_of_i;
'd161:S_161 <= S_of_i;
'd162:S_162 <= S_of_i;
'd163:S_163 <= S_of_i;
'd164:S_164 <= S_of_i;
'd165:S_165 <= S_of_i;
'd166:S_166 <= S_of_i;
'd167:S_167 <= S_of_i;
'd168:S_168 <= S_of_i;
'd169:S_169 <= S_of_i;
'd170:S_170 <= S_of_i;
'd171:S_171 <= S_of_i;
'd172:S_172 <= S_of_i;
'd173:S_173 <= S_of_i;
'd174:S_174 <= S_of_i;
'd175:S_175 <= S_of_i;
'd176:S_176 <= S_of_i;
'd177:S_177 <= S_of_i;
'd178:S_178 <= S_of_i;
'd179:S_179 <= S_of_i;
'd180:S_180 <= S_of_i;
'd181:S_181 <= S_of_i;
'd182:S_182 <= S_of_i;
'd183:S_183 <= S_of_i;
'd184:S_184 <= S_of_i;
'd185:S_185 <= S_of_i;
'd186:S_186 <= S_of_i;
'd187:S_187 <= S_of_i;
'd188:S_188 <= S_of_i;
'd189:S_189 <= S_of_i;
'd190:S_190 <= S_of_i;
'd191:S_191 <= S_of_i;
'd192:S_192 <= S_of_i;
'd193:S_193 <= S_of_i;
'd194:S_194 <= S_of_i;
'd195:S_195 <= S_of_i;
'd196:S_196 <= S_of_i;
'd197:S_197 <= S_of_i;
'd198:S_198 <= S_of_i;
'd199:S_199 <= S_of_i;
'd200:S_200 <= S_of_i;
'd201:S_201 <= S_of_i;
'd202:S_202 <= S_of_i;
'd203:S_203 <= S_of_i;
'd204:S_204 <= S_of_i;
'd205:S_205 <= S_of_i;
'd206:S_206 <= S_of_i;
'd207:S_207 <= S_of_i;
'd208:S_208 <= S_of_i;
'd209:S_209 <= S_of_i;
'd210:S_210 <= S_of_i;
'd211:S_211 <= S_of_i;
'd212:S_212 <= S_of_i;
'd213:S_213 <= S_of_i;
'd214:S_214 <= S_of_i;
'd215:S_215 <= S_of_i;
'd216:S_216 <= S_of_i;
'd217:S_217 <= S_of_i;
'd218:S_218 <= S_of_i;
'd219:S_219 <= S_of_i;
'd220:S_220 <= S_of_i;
'd221:S_221 <= S_of_i;
'd222:S_222 <= S_of_i;
'd223:S_223 <= S_of_i;
'd224:S_224 <= S_of_i;
'd225:S_225 <= S_of_i;
'd226:S_226 <= S_of_i;
'd227:S_227 <= S_of_i;
'd228:S_228 <= S_of_i;
'd229:S_229 <= S_of_i;
'd230:S_230 <= S_of_i;
'd231:S_231 <= S_of_i;
'd232:S_232 <= S_of_i;
'd233:S_233 <= S_of_i;
'd234:S_234 <= S_of_i;
'd235:S_235 <= S_of_i;
'd236:S_236 <= S_of_i;
'd237:S_237 <= S_of_i;
'd238:S_238 <= S_of_i;
'd239:S_239 <= S_of_i;
'd240:S_240 <= S_of_i;
'd241:S_241 <= S_of_i;
'd242:S_242 <= S_of_i;
'd243:S_243 <= S_of_i;
'd244:S_244 <= S_of_i;
'd245:S_245 <= S_of_i;
'd246:S_246 <= S_of_i;
'd247:S_247 <= S_of_i;
'd248:S_248 <= S_of_i;
'd249:S_249 <= S_of_i;
'd250:S_250 <= S_of_i;
'd251:S_251 <= S_of_i;
'd252:S_252 <= S_of_i;
'd253:S_253 <= S_of_i;
'd254:S_254 <= S_of_i;
'd255:S_255 <= S_of_i;
default:S_256 <= S_of_i;
endcase
// in place of:
// K <= S[ S[i]+S[j] ];
case (S_of_i_plus_S_of_j)
'd0:K <= S_0;
'd1:K <= S_1;
'd2:K <= S_2;
'd3:K <= S_3;
'd4:K <= S_4;
'd5:K <= S_5;
'd6:K <= S_6;
'd7:K <= S_7;
'd8:K <= S_8;
'd9:K <= S_9;
'd10:K <= S_10;
'd11:K <= S_11;
'd12:K <= S_12;
'd13:K <= S_13;
'd14:K <= S_14;
'd15:K <= S_15;
'd16:K <= S_16;
'd17:K <= S_17;
'd18:K <= S_18;
'd19:K <= S_19;
'd20:K <= S_20;
'd21:K <= S_21;
'd22:K <= S_22;
'd23:K <= S_23;
'd24:K <= S_24;
'd25:K <= S_25;
'd26:K <= S_26;
'd27:K <= S_27;
'd28:K <= S_28;
'd29:K <= S_29;
'd30:K <= S_30;
'd31:K <= S_31;
'd32:K <= S_32;
'd33:K <= S_33;
'd34:K <= S_34;
'd35:K <= S_35;
'd36:K <= S_36;
'd37:K <= S_37;
'd38:K <= S_38;
'd39:K <= S_39;
'd40:K <= S_40;
'd41:K <= S_41;
'd42:K <= S_42;
'd43:K <= S_43;
'd44:K <= S_44;
'd45:K <= S_45;
'd46:K <= S_46;
'd47:K <= S_47;
'd48:K <= S_48;
'd49:K <= S_49;
'd50:K <= S_50;
'd51:K <= S_51;
'd52:K <= S_52;
'd53:K <= S_53;
'd54:K <= S_54;
'd55:K <= S_55;
'd56:K <= S_56;
'd57:K <= S_57;
'd58:K <= S_58;
'd59:K <= S_59;
'd60:K <= S_60;
'd61:K <= S_61;
'd62:K <= S_62;
'd63:K <= S_63;
'd64:K <= S_64;
'd65:K <= S_65;
'd66:K <= S_66;
'd67:K <= S_67;
'd68:K <= S_68;
'd69:K <= S_69;
'd70:K <= S_70;
'd71:K <= S_71;
'd72:K <= S_72;
'd73:K <= S_73;
'd74:K <= S_74;
'd75:K <= S_75;
'd76:K <= S_76;
'd77:K <= S_77;
'd78:K <= S_78;
'd79:K <= S_79;
'd80:K <= S_80;
'd81:K <= S_81;
'd82:K <= S_82;
'd83:K <= S_83;
'd84:K <= S_84;
'd85:K <= S_85;
'd86:K <= S_86;
'd87:K <= S_87;
'd88:K <= S_88;
'd89:K <= S_89;
'd90:K <= S_90;
'd91:K <= S_91;
'd92:K <= S_92;
'd93:K <= S_93;
'd94:K <= S_94;
'd95:K <= S_95;
'd96:K <= S_96;
'd97:K <= S_97;
'd98:K <= S_98;
'd99:K <= S_99;
'd100:K <= S_100;
'd101:K <= S_101;
'd102:K <= S_102;
'd103:K <= S_103;
'd104:K <= S_104;
'd105:K <= S_105;
'd106:K <= S_106;
'd107:K <= S_107;
'd108:K <= S_108;
'd109:K <= S_109;
'd110:K <= S_110;
'd111:K <= S_111;
'd112:K <= S_112;
'd113:K <= S_113;
'd114:K <= S_114;
'd115:K <= S_115;
'd116:K <= S_116;
'd117:K <= S_117;
'd118:K <= S_118;
'd119:K <= S_119;
'd120:K <= S_120;
'd121:K <= S_121;
'd122:K <= S_122;
'd123:K <= S_123;
'd124:K <= S_124;
'd125:K <= S_125;
'd126:K <= S_126;
'd127:K <= S_127;
'd128:K <= S_128;
'd129:K <= S_129;
'd130:K <= S_130;
'd131:K <= S_131;
'd132:K <= S_132;
'd133:K <= S_133;
'd134:K <= S_134;
'd135:K <= S_135;
'd136:K <= S_136;
'd137:K <= S_137;
'd138:K <= S_138;
'd139:K <= S_139;
'd140:K <= S_140;
'd141:K <= S_141;
'd142:K <= S_142;
'd143:K <= S_143;
'd144:K <= S_144;
'd145:K <= S_145;
'd146:K <= S_146;
'd147:K <= S_147;
'd148:K <= S_148;
'd149:K <= S_149;
'd150:K <= S_150;
'd151:K <= S_151;
'd152:K <= S_152;
'd153:K <= S_153;
'd154:K <= S_154;
'd155:K <= S_155;
'd156:K <= S_156;
'd157:K <= S_157;
'd158:K <= S_158;
'd159:K <= S_159;
'd160:K <= S_160;
'd161:K <= S_161;
'd162:K <= S_162;
'd163:K <= S_163;
'd164:K <= S_164;
'd165:K <= S_165;
'd166:K <= S_166;
'd167:K <= S_167;
'd168:K <= S_168;
'd169:K <= S_169;
'd170:K <= S_170;
'd171:K <= S_171;
'd172:K <= S_172;
'd173:K <= S_173;
'd174:K <= S_174;
'd175:K <= S_175;
'd176:K <= S_176;
'd177:K <= S_177;
'd178:K <= S_178;
'd179:K <= S_179;
'd180:K <= S_180;
'd181:K <= S_181;
'd182:K <= S_182;
'd183:K <= S_183;
'd184:K <= S_184;
'd185:K <= S_185;
'd186:K <= S_186;
'd187:K <= S_187;
'd188:K <= S_188;
'd189:K <= S_189;
'd190:K <= S_190;
'd191:K <= S_191;
'd192:K <= S_192;
'd193:K <= S_193;
'd194:K <= S_194;
'd195:K <= S_195;
'd196:K <= S_196;
'd197:K <= S_197;
'd198:K <= S_198;
'd199:K <= S_199;
'd200:K <= S_200;
'd201:K <= S_201;
'd202:K <= S_202;
'd203:K <= S_203;
'd204:K <= S_204;
'd205:K <= S_205;
'd206:K <= S_206;
'd207:K <= S_207;
'd208:K <= S_208;
'd209:K <= S_209;
'd210:K <= S_210;
'd211:K <= S_211;
'd212:K <= S_212;
'd213:K <= S_213;
'd214:K <= S_214;
'd215:K <= S_215;
'd216:K <= S_216;
'd217:K <= S_217;
'd218:K <= S_218;
'd219:K <= S_219;
'd220:K <= S_220;
'd221:K <= S_221;
'd222:K <= S_222;
'd223:K <= S_223;
'd224:K <= S_224;
'd225:K <= S_225;
'd226:K <= S_226;
'd227:K <= S_227;
'd228:K <= S_228;
'd229:K <= S_229;
'd230:K <= S_230;
'd231:K <= S_231;
'd232:K <= S_232;
'd233:K <= S_233;
'd234:K <= S_234;
'd235:K <= S_235;
'd236:K <= S_236;
'd237:K <= S_237;
'd238:K <= S_238;
'd239:K <= S_239;
'd240:K <= S_240;
'd241:K <= S_241;
'd242:K <= S_242;
'd243:K <= S_243;
'd244:K <= S_244;
'd245:K <= S_245;
'd246:K <= S_246;
'd247:K <= S_247;
'd248:K <= S_248;
'd249:K <= S_249;
'd250:K <= S_250;
'd251:K <= S_251;
'd252:K <= S_252;
'd253:K <= S_253;
'd254:K <= S_254;
'd255:K <= S_255;
default:K <= S_256;
endcase
if (discardCount<11'h600) begin // discard first 1536 values / RFC 4345
discardCount<=discardCount+1;
end else begin
output_ready <= 1; // Valid K at output
end
i <= i+1;
// Here is the secret of 1-clock: we develop all possible values of j in the future
if (j==i+1) begin
// j <= (j + S[i]);
j <= (j + S_of_i);
end else begin
if (i==255) begin
j <= (j + S_0);
end else begin
// in place of:
// j <= (j + S[i+1]);
j <= (j + S_of_i_plus_1);
end
end
//$display ("rc4: output = %08X",K);
end
default: begin
case (prev_i)
'd0:S_0 <= prev_S_of_j;
'd1:S_1 <= prev_S_of_j;
'd2:S_2 <= prev_S_of_j;
'd3:S_3 <= prev_S_of_j;
'd4:S_4 <= prev_S_of_j;
'd5:S_5 <= prev_S_of_j;
'd6:S_6 <= prev_S_of_j;
'd7:S_7 <= prev_S_of_j;
'd8:S_8 <= prev_S_of_j;
'd9:S_9 <= prev_S_of_j;
'd10:S_10 <= prev_S_of_j;
'd11:S_11 <= prev_S_of_j;
'd12:S_12 <= prev_S_of_j;
'd13:S_13 <= prev_S_of_j;
'd14:S_14 <= prev_S_of_j;
'd15:S_15 <= prev_S_of_j;
'd16:S_16 <= prev_S_of_j;
'd17:S_17 <= prev_S_of_j;
'd18:S_18 <= prev_S_of_j;
'd19:S_19 <= prev_S_of_j;
'd20:S_20 <= prev_S_of_j;
'd21:S_21 <= prev_S_of_j;
'd22:S_22 <= prev_S_of_j;
'd23:S_23 <= prev_S_of_j;
'd24:S_24 <= prev_S_of_j;
'd25:S_25 <= prev_S_of_j;
'd26:S_26 <= prev_S_of_j;
'd27:S_27 <= prev_S_of_j;
'd28:S_28 <= prev_S_of_j;
'd29:S_29 <= prev_S_of_j;
'd30:S_30 <= prev_S_of_j;
'd31:S_31 <= prev_S_of_j;
'd32:S_32 <= prev_S_of_j;
'd33:S_33 <= prev_S_of_j;
'd34:S_34 <= prev_S_of_j;
'd35:S_35 <= prev_S_of_j;
'd36:S_36 <= prev_S_of_j;
'd37:S_37 <= prev_S_of_j;
'd38:S_38 <= prev_S_of_j;
'd39:S_39 <= prev_S_of_j;
'd40:S_40 <= prev_S_of_j;
'd41:S_41 <= prev_S_of_j;
'd42:S_42 <= prev_S_of_j;
'd43:S_43 <= prev_S_of_j;
'd44:S_44 <= prev_S_of_j;
'd45:S_45 <= prev_S_of_j;
'd46:S_46 <= prev_S_of_j;
'd47:S_47 <= prev_S_of_j;
'd48:S_48 <= prev_S_of_j;
'd49:S_49 <= prev_S_of_j;
'd50:S_50 <= prev_S_of_j;
'd51:S_51 <= prev_S_of_j;
'd52:S_52 <= prev_S_of_j;
'd53:S_53 <= prev_S_of_j;
'd54:S_54 <= prev_S_of_j;
'd55:S_55 <= prev_S_of_j;
'd56:S_56 <= prev_S_of_j;
'd57:S_57 <= prev_S_of_j;
'd58:S_58 <= prev_S_of_j;
'd59:S_59 <= prev_S_of_j;
'd60:S_60 <= prev_S_of_j;
'd61:S_61 <= prev_S_of_j;
'd62:S_62 <= prev_S_of_j;
'd63:S_63 <= prev_S_of_j;
'd64:S_64 <= prev_S_of_j;
'd65:S_65 <= prev_S_of_j;
'd66:S_66 <= prev_S_of_j;
'd67:S_67 <= prev_S_of_j;
'd68:S_68 <= prev_S_of_j;
'd69:S_69 <= prev_S_of_j;
'd70:S_70 <= prev_S_of_j;
'd71:S_71 <= prev_S_of_j;
'd72:S_72 <= prev_S_of_j;
'd73:S_73 <= prev_S_of_j;
'd74:S_74 <= prev_S_of_j;
'd75:S_75 <= prev_S_of_j;
'd76:S_76 <= prev_S_of_j;
'd77:S_77 <= prev_S_of_j;
'd78:S_78 <= prev_S_of_j;
'd79:S_79 <= prev_S_of_j;
'd80:S_80 <= prev_S_of_j;
'd81:S_81 <= prev_S_of_j;
'd82:S_82 <= prev_S_of_j;
'd83:S_83 <= prev_S_of_j;
'd84:S_84 <= prev_S_of_j;
'd85:S_85 <= prev_S_of_j;
'd86:S_86 <= prev_S_of_j;
'd87:S_87 <= prev_S_of_j;
'd88:S_88 <= prev_S_of_j;
'd89:S_89 <= prev_S_of_j;
'd90:S_90 <= prev_S_of_j;
'd91:S_91 <= prev_S_of_j;
'd92:S_92 <= prev_S_of_j;
'd93:S_93 <= prev_S_of_j;
'd94:S_94 <= prev_S_of_j;
'd95:S_95 <= prev_S_of_j;
'd96:S_96 <= prev_S_of_j;
'd97:S_97 <= prev_S_of_j;
'd98:S_98 <= prev_S_of_j;
'd99:S_99 <= prev_S_of_j;
'd100:S_100 <= prev_S_of_j;
'd101:S_101 <= prev_S_of_j;
'd102:S_102 <= prev_S_of_j;
'd103:S_103 <= prev_S_of_j;
'd104:S_104 <= prev_S_of_j;
'd105:S_105 <= prev_S_of_j;
'd106:S_106 <= prev_S_of_j;
'd107:S_107 <= prev_S_of_j;
'd108:S_108 <= prev_S_of_j;
'd109:S_109 <= prev_S_of_j;
'd110:S_110 <= prev_S_of_j;
'd111:S_111 <= prev_S_of_j;
'd112:S_112 <= prev_S_of_j;
'd113:S_113 <= prev_S_of_j;
'd114:S_114 <= prev_S_of_j;
'd115:S_115 <= prev_S_of_j;
'd116:S_116 <= prev_S_of_j;
'd117:S_117 <= prev_S_of_j;
'd118:S_118 <= prev_S_of_j;
'd119:S_119 <= prev_S_of_j;
'd120:S_120 <= prev_S_of_j;
'd121:S_121 <= prev_S_of_j;
'd122:S_122 <= prev_S_of_j;
'd123:S_123 <= prev_S_of_j;
'd124:S_124 <= prev_S_of_j;
'd125:S_125 <= prev_S_of_j;
'd126:S_126 <= prev_S_of_j;
'd127:S_127 <= prev_S_of_j;
'd128:S_128 <= prev_S_of_j;
'd129:S_129 <= prev_S_of_j;
'd130:S_130 <= prev_S_of_j;
'd131:S_131 <= prev_S_of_j;
'd132:S_132 <= prev_S_of_j;
'd133:S_133 <= prev_S_of_j;
'd134:S_134 <= prev_S_of_j;
'd135:S_135 <= prev_S_of_j;
'd136:S_136 <= prev_S_of_j;
'd137:S_137 <= prev_S_of_j;
'd138:S_138 <= prev_S_of_j;
'd139:S_139 <= prev_S_of_j;
'd140:S_140 <= prev_S_of_j;
'd141:S_141 <= prev_S_of_j;
'd142:S_142 <= prev_S_of_j;
'd143:S_143 <= prev_S_of_j;
'd144:S_144 <= prev_S_of_j;
'd145:S_145 <= prev_S_of_j;
'd146:S_146 <= prev_S_of_j;
'd147:S_147 <= prev_S_of_j;
'd148:S_148 <= prev_S_of_j;
'd149:S_149 <= prev_S_of_j;
'd150:S_150 <= prev_S_of_j;
'd151:S_151 <= prev_S_of_j;
'd152:S_152 <= prev_S_of_j;
'd153:S_153 <= prev_S_of_j;
'd154:S_154 <= prev_S_of_j;
'd155:S_155 <= prev_S_of_j;
'd156:S_156 <= prev_S_of_j;
'd157:S_157 <= prev_S_of_j;
'd158:S_158 <= prev_S_of_j;
'd159:S_159 <= prev_S_of_j;
'd160:S_160 <= prev_S_of_j;
'd161:S_161 <= prev_S_of_j;
'd162:S_162 <= prev_S_of_j;
'd163:S_163 <= prev_S_of_j;
'd164:S_164 <= prev_S_of_j;
'd165:S_165 <= prev_S_of_j;
'd166:S_166 <= prev_S_of_j;
'd167:S_167 <= prev_S_of_j;
'd168:S_168 <= prev_S_of_j;
'd169:S_169 <= prev_S_of_j;
'd170:S_170 <= prev_S_of_j;
'd171:S_171 <= prev_S_of_j;
'd172:S_172 <= prev_S_of_j;
'd173:S_173 <= prev_S_of_j;
'd174:S_174 <= prev_S_of_j;
'd175:S_175 <= prev_S_of_j;
'd176:S_176 <= prev_S_of_j;
'd177:S_177 <= prev_S_of_j;
'd178:S_178 <= prev_S_of_j;
'd179:S_179 <= prev_S_of_j;
'd180:S_180 <= prev_S_of_j;
'd181:S_181 <= prev_S_of_j;
'd182:S_182 <= prev_S_of_j;
'd183:S_183 <= prev_S_of_j;
'd184:S_184 <= prev_S_of_j;
'd185:S_185 <= prev_S_of_j;
'd186:S_186 <= prev_S_of_j;
'd187:S_187 <= prev_S_of_j;
'd188:S_188 <= prev_S_of_j;
'd189:S_189 <= prev_S_of_j;
'd190:S_190 <= prev_S_of_j;
'd191:S_191 <= prev_S_of_j;
'd192:S_192 <= prev_S_of_j;
'd193:S_193 <= prev_S_of_j;
'd194:S_194 <= prev_S_of_j;
'd195:S_195 <= prev_S_of_j;
'd196:S_196 <= prev_S_of_j;
'd197:S_197 <= prev_S_of_j;
'd198:S_198 <= prev_S_of_j;
'd199:S_199 <= prev_S_of_j;
'd200:S_200 <= prev_S_of_j;
'd201:S_201 <= prev_S_of_j;
'd202:S_202 <= prev_S_of_j;
'd203:S_203 <= prev_S_of_j;
'd204:S_204 <= prev_S_of_j;
'd205:S_205 <= prev_S_of_j;
'd206:S_206 <= prev_S_of_j;
'd207:S_207 <= prev_S_of_j;
'd208:S_208 <= prev_S_of_j;
'd209:S_209 <= prev_S_of_j;
'd210:S_210 <= prev_S_of_j;
'd211:S_211 <= prev_S_of_j;
'd212:S_212 <= prev_S_of_j;
'd213:S_213 <= prev_S_of_j;
'd214:S_214 <= prev_S_of_j;
'd215:S_215 <= prev_S_of_j;
'd216:S_216 <= prev_S_of_j;
'd217:S_217 <= prev_S_of_j;
'd218:S_218 <= prev_S_of_j;
'd219:S_219 <= prev_S_of_j;
'd220:S_220 <= prev_S_of_j;
'd221:S_221 <= prev_S_of_j;
'd222:S_222 <= prev_S_of_j;
'd223:S_223 <= prev_S_of_j;
'd224:S_224 <= prev_S_of_j;
'd225:S_225 <= prev_S_of_j;
'd226:S_226 <= prev_S_of_j;
'd227:S_227 <= prev_S_of_j;
'd228:S_228 <= prev_S_of_j;
'd229:S_229 <= prev_S_of_j;
'd230:S_230 <= prev_S_of_j;
'd231:S_231 <= prev_S_of_j;
'd232:S_232 <= prev_S_of_j;
'd233:S_233 <= prev_S_of_j;
'd234:S_234 <= prev_S_of_j;
'd235:S_235 <= prev_S_of_j;
'd236:S_236 <= prev_S_of_j;
'd237:S_237 <= prev_S_of_j;
'd238:S_238 <= prev_S_of_j;
'd239:S_239 <= prev_S_of_j;
'd240:S_240 <= prev_S_of_j;
'd241:S_241 <= prev_S_of_j;
'd242:S_242 <= prev_S_of_j;
'd243:S_243 <= prev_S_of_j;
'd244:S_244 <= prev_S_of_j;
'd245:S_245 <= prev_S_of_j;
'd246:S_246 <= prev_S_of_j;
'd247:S_247 <= prev_S_of_j;
'd248:S_248 <= prev_S_of_j;
'd249:S_249 <= prev_S_of_j;
'd250:S_250 <= prev_S_of_j;
'd251:S_251 <= prev_S_of_j;
'd252:S_252 <= prev_S_of_j;
'd253:S_253 <= prev_S_of_j;
'd254:S_254 <= prev_S_of_j;
'd255:S_255 <= prev_S_of_j;
default:S_256 <= prev_S_of_j;
endcase
case (KSState)
4'h5: KSState <= 4'h2;
4'h6: KSState <= 4'h3;
4'h7: KSState <= 4'h4;
endcase
end
endcase
end
end
endmodule