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moved array type definitions out of functions to head of package, instances now also in package head and are constants

T. Meissner 7 years ago
parent
45c9409572
commit
716ce2725b
1 changed files with 113 additions and 110 deletions
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  1. 113
    110
      cbcdes/rtl/vhdl/des_pkg.vhd

+ 113
- 110
cbcdes/rtl/vhdl/des_pkg.vhd View File 

@@ -29,8 +29,10 @@ USE ieee.std_logic_1164.all;
29 29 
 USE ieee.numeric_std.ALL;
30 30
31 31
32 
+
32 33 
 PACKAGE des_pkg IS
33 34
35 
+
34 36 
   FUNCTION ip  ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector;
35 37 
   FUNCTION ipn ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector;
36 38 
 
@@ -52,14 +54,8 @@ PACKAGE des_pkg IS
52 54 
   FUNCTION pc1_d ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector;
53 55 
   FUNCTION pc2   ( input_vector : std_logic_vector(0 TO 55) ) RETURN std_logic_vector;
54 56
55 
-END PACKAGE des_pkg;
56 
-
57 
-
58 
-PACKAGE BODY des_pkg IS
59 
-
60 
-  FUNCTION ip ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector IS
61 
-    TYPE matrix IS ARRAY (0 TO 63) OF natural RANGE 0 TO 63;
62 
-    VARIABLE table : matrix := (57, 49, 41, 33, 25, 17,  9, 1,
57 
+  TYPE ip_matrix IS ARRAY (0 TO 63) OF natural RANGE 0 TO 63;
58 
+  constant ip_table : ip_matrix := (57, 49, 41, 33, 25, 17,  9, 1,
63 59 
                                 59, 51, 43, 35, 27, 19, 11, 3,
64 60 
                                 61, 53, 45, 37, 29, 21, 13, 5,
65 61 
                                 63, 55, 47, 39, 31, 23, 15, 7,
 
@@ -67,56 +63,125 @@ PACKAGE BODY des_pkg IS
67 63 
                                 58, 50, 42, 34, 26, 18, 10, 2,
68 64 
                                 60, 52, 44, 36, 28, 20, 12, 4,
69 65 
                                 62, 54, 46, 38, 30, 22, 14, 6);
66 
+  constant ipn_table : ip_matrix := (39,  7, 47, 15, 55, 23, 63, 31,
67 
+                                38,  6, 46, 14, 54, 22, 62, 30,
68 
+                                37,  5, 45, 13, 53, 21, 61, 29,
69 
+                                36,  4, 44, 12, 52, 20, 60, 28,
70 
+                                35,  3, 43, 11, 51, 19, 59, 27,
71 
+                                34,  2, 42, 10, 50, 18, 58, 26,
72 
+                                33,  1, 41,  9, 49, 17, 57, 25,
73 
+                                32,  0, 40,  8, 48, 16, 56, 24);
74 
+
75 
+  TYPE e_matrix IS ARRAY (0 TO 47) OF natural RANGE 0 TO 31;
76 
+  constant e_table : e_matrix := (31,  0,  1,  2,  3,  4,
77 
+                                 3,  4,  5,  6,  7,  8,
78 
+                                 7,  8,  9, 10, 11, 12,
79 
+                                11, 12, 13, 14, 15, 16,
80 
+                                15, 16, 17, 18, 19, 20,
81 
+                                19, 20, 21, 22, 23, 24,
82 
+                                23, 24, 25, 26, 27, 28,
83 
+                                27, 28, 29, 30, 31,  0);
84 
+
85 
+  TYPE s_matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
86 
+  constant s1_table  : s_matrix := (0 => (14,  4, 13,  1,  2, 15, 11,  8,  3, 10,  6, 12,  5,  9,  0,  7),
87 
+                                    1 => ( 0, 15,  7,  4, 14,  2, 13,  1, 10,  6, 12, 11,  9,  5,  3,  8),
88 
+                                    2 => ( 4,  1, 14,  8, 13,  6,  2, 11, 15, 12,  9,  7,  3, 10,  5,  0),
89 
+                                    3 => (15, 12,  8,  2,  4,  9,  1,  7,  5, 11,  3, 14, 10,  0,  6, 13));
90 
+  constant s2_table  : s_matrix := (0 => (15,  1,  8, 14,  6, 11,  3,  4,  9,  7,  2, 13, 12,  0,  5, 10),
91 
+                                    1 => ( 3, 13,  4,  7, 15,  2,  8, 14, 12,  0,  1, 10,  6,  9, 11,  5),
92 
+                                    2 => ( 0, 14,  7, 11, 10,  4, 13,  1,  5,  8, 12,  6,  9,  3,  2, 15),
93 
+                                    3 => (13,  8, 10,  1,  3, 15,  4,  2, 11,  6,  7, 12,  0,  5, 14,  9));
94 
+  constant s3_table  : s_matrix := (0 => (10,  0,  9, 14,  6,  3, 15,  5,  1, 13, 12,  7, 11,  4,  2,  8),
95 
+                                    1 => (13,  7,  0,  9,  3,  4,  6, 10,  2,  8,  5, 14, 12, 11, 15,  1),
96 
+                                    2 => (13,  6,  4,  9,  8, 15,  3,  0, 11,  1,  2, 12,  5, 10, 14,  7),
97 
+                                    3 => ( 1, 10, 13,  0,  6,  9,  8,  7,  4, 15, 14,  3, 11,  5,  2, 12));
98 
+  constant s4_table  : s_matrix := (0 => ( 7, 13, 14,  3,  0,  6,  9, 10,  1,  2,  8,  5, 11, 12,  4,  15),
99 
+                                    1 => (13,  8, 11,  5,  6, 15,  0,  3,  4,  7,  2, 12,  1, 10, 14,   9),
100 
+                                    2 => (10,  6,  9,  0, 12, 11,  7, 13, 15,  1,  3, 14,  5,  2,  8,   4),
101 
+                                    3 => ( 3, 15,  0,  6, 10,  1, 13,  8,  9,  4,  5, 11, 12,  7,  2,  14));
102 
+  constant s5_table  : s_matrix := (0 => ( 2, 12,  4,  1,  7, 10, 11,  6,  8,  5,  3, 15, 13,  0, 14,  9),
103 
+                                    1 => (14, 11,  2, 12,  4,  7, 13,  1,  5,  0, 15, 10,  3,  9,  8,  6),
104 
+                                    2 => ( 4,  2,  1, 11, 10, 13,  7,  8, 15,  9, 12,  5,  6,  3,  0, 14),
105 
+                                    3 => (11,  8, 12,  7,  1, 14,  2, 13,  6, 15,  0,  9, 10,  4,  5,  3));
106 
+  constant s6_table  : s_matrix := (0 => (12,  1, 10, 15,  9,  2,  6,  8,  0, 13,  3,  4, 14,  7,  5, 11),
107 
+                                    1 => (10, 15,  4,  2,  7, 12,  9,  5,  6,  1, 13, 14,  0, 11,  3,  8),
108 
+                                    2 => ( 9, 14, 15,  5,  2,  8, 12,  3,  7,  0,  4, 10,  1, 13, 11,  6),
109 
+                                    3 => ( 4,  3,  2, 12,  9,  5, 15, 10, 11, 14,  1,  7,  6,  0,  8, 13));
110 
+  constant s7_table  : s_matrix := (0 => ( 4, 11,  2, 14, 15,  0,  8, 13,  3, 12,  9,  7,  5, 10,  6,  1),
111 
+                                    1 => (13,  0, 11,  7,  4,  9,  1, 10, 14,  3,  5, 12,  2, 15,  8,  6),
112 
+                                    2 => ( 1,  4, 11, 13, 12,  3,  7, 14, 10, 15,  6,  8,  0,  5,  9,  2),
113 
+                                    3 => ( 6, 11, 13,  8,  1,  4, 10,  7,  9,  5,  0, 15, 14,  2,  3, 12));
114 
+  constant s8_table  : s_matrix := (0 => (13,  2,  8,  4,  6, 15, 11,  1, 10,  9,  3, 14,  5,  0, 12,  7),
115 
+                                    1 => ( 1, 15, 13,  8, 10,  3,  7,  4, 12,  5,  6, 11,  0, 14,  9,  2),
116 
+                                    2 => ( 7, 11,  4,  1,  9, 12, 14,  2,  0,  6, 10, 13, 15,  3,  5,  8),
117 
+                                    3 => ( 2,  1, 14,  7,  4, 10,  8, 13, 15, 12,  9,  0,  3,  5,  6, 11));
118 
+
119 
+  type pc_matrix IS ARRAY (0 TO 27) OF natural RANGE 0 TO 63;
120 
+  constant pc1c_table : pc_matrix := (56, 48, 40, 32, 24, 16,  8,
121 
+                                 0, 57, 49, 41, 33, 25, 17,
122 
+                                 9,  1, 58, 50, 42, 34, 26,
123 
+                                18, 10,  2, 59, 51, 43, 35);
124 
+  constant pc1d_table : pc_matrix := (62, 54, 46, 38, 30, 22, 14,
125 
+                                 6, 61, 53, 45, 37, 29, 21,
126 
+                                13,  5, 60, 52, 44, 36, 28,
127 
+                                20, 12,  4, 27, 19, 11,  3);
128 
+
129 
+  type p_matrix IS ARRAY (0 TO 31) OF natural RANGE 0 TO 31;
130 
+  constant p_table : p_matrix := (15,  6, 19, 20,
131 
+                                28, 11, 27, 16,
132 
+                                 0, 14, 22, 25,
133 
+                                 4, 17, 30,  9,
134 
+                                 1,  7, 23, 13,
135 
+                                31, 26,  2,  8,
136 
+                                18, 12, 29,  5,
137 
+                                21, 10,  3, 24);
138 
+
139 
+  type pc2_matrix IS ARRAY (0 TO 47) OF natural RANGE 0 TO 63;
140 
+  constant pc2_table : pc2_matrix := (13, 16, 10, 23,  0,  4,
141 
+                                 2, 27, 14,  5, 20,  9,
142 
+                                22, 18, 11,  3, 25,  7,
143 
+                                15,  6, 26, 19, 12,  1,
144 
+                                40, 51, 30, 36, 46, 54,
145 
+                                29, 39, 50, 44, 32, 47,
146 
+                                43, 48, 38, 55, 33, 52,
147 
+                                45, 41, 49, 35, 28, 31);
148 
+
149 
+
150 
+END PACKAGE des_pkg;
151 
+
152 
+
153 
+
154 
+PACKAGE BODY des_pkg IS
155 
+
156 
+
157 
+  FUNCTION ip ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector IS
70 158 
     VARIABLE result : std_logic_vector(0 TO 63);
71 159 
   BEGIN
72 160 
     FOR index IN 0 TO 63 LOOP
73 
-      result( index ) := input_vector( table( index ) );
161 
+      result( index ) := input_vector( ip_table( index ) );
74 162 
     END LOOP;
75 163 
     RETURN result;
76 164 
   END FUNCTION ip;
77 165
78 166 
   FUNCTION ipn ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector IS
79 
-    TYPE matrix IS ARRAY (0 TO 63) OF natural RANGE 0 TO 63;
80 
-    VARIABLE table : matrix := (39,  7, 47, 15, 55, 23, 63, 31,
81 
-                                38,  6, 46, 14, 54, 22, 62, 30,
82 
-                                37,  5, 45, 13, 53, 21, 61, 29,
83 
-                                36,  4, 44, 12, 52, 20, 60, 28,
84 
-                                35,  3, 43, 11, 51, 19, 59, 27,
85 
-                                34,  2, 42, 10, 50, 18, 58, 26,
86 
-                                33,  1, 41,  9, 49, 17, 57, 25,
87 
-                                32,  0, 40,  8, 48, 16, 56, 24);
88 167 
     VARIABLE result : std_logic_vector(0 TO 63);
89 168 
   BEGIN
90 169 
     FOR index IN 0 TO 63 LOOP
91 
-      result( index ) := input_vector( table( index ) );
170 
+      result( index ) := input_vector( ipn_table( index ) );
92 171 
     END LOOP;
93 172 
     RETURN result;
94 173 
   END FUNCTION ipn;
95 174
96 175 
   FUNCTION e (input_vector : std_logic_vector(0 TO 31) ) RETURN std_logic_vector IS
97 
-    TYPE matrix IS ARRAY (0 TO 47) OF natural RANGE 0 TO 31;
98 
-    VARIABLE table : matrix := (31,  0,  1,  2,  3,  4,
99 
-                                 3,  4,  5,  6,  7,  8,
100 
-                                 7,  8,  9, 10, 11, 12,
101 
-                                11, 12, 13, 14, 15, 16,
102 
-                                15, 16, 17, 18, 19, 20,
103 
-                                19, 20, 21, 22, 23, 24,
104 
-                                23, 24, 25, 26, 27, 28,
105 
-                                27, 28, 29, 30, 31,  0);
106 176 
     VARIABLE result : std_logic_vector(0 TO 47);
107 177 
   BEGIN
108 178 
     FOR index IN 0 TO 47 LOOP
109 
-      result( index ) := input_vector( table( index ) );
179 
+      result( index ) := input_vector( e_table( index ) );
110 180 
     END LOOP;
111 181 
     RETURN result;
112 182 
   END FUNCTION e;
113 183
114 184 
   FUNCTION s1 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
115 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
116 
-    VARIABLE table  : matrix := (0 => (14,  4, 13,  1,  2, 15, 11,  8,  3, 10,  6, 12,  5,  9,  0,  7),
117 
-                                 1 => ( 0, 15,  7,  4, 14,  2, 13,  1, 10,  6, 12, 11,  9,  5,  3,  8),
118 
-                                 2 => ( 4,  1, 14,  8, 13,  6,  2, 11, 15, 12,  9,  7,  3, 10,  5,  0),
119 
-                                 3 => (15, 12,  8,  2,  4,  9,  1,  7,  5, 11,  3, 14, 10,  0,  6, 13));
120 185 
     VARIABLE int : std_logic_vector(0 TO 1);
121 186 
     VARIABLE i : integer RANGE 0 TO 3;
122 187 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -125,16 +190,11 @@ PACKAGE BODY des_pkg IS
125 190 
     int := input_vector( 0 ) & input_vector( 5 );
126 191 
     i := to_integer( unsigned( int ) );
127 192 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
128 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
193 
+    result := std_logic_vector( to_unsigned( s1_table( i, j ), 4 ) );
129 194 
     RETURN result;
130 195 
   END FUNCTION s1;
131 196
132 197 
   FUNCTION s2 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
133 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
134 
-    VARIABLE table  : matrix := (0 => (15,  1,  8, 14,  6, 11,  3,  4,  9,  7,  2, 13, 12,  0,  5, 10),
135 
-                                 1 => ( 3, 13,  4,  7, 15,  2,  8, 14, 12,  0,  1, 10,  6,  9, 11,  5),
136 
-                                 2 => ( 0, 14,  7, 11, 10,  4, 13,  1,  5,  8, 12,  6,  9,  3,  2, 15),
137 
-                                 3 => (13,  8, 10,  1,  3, 15,  4,  2, 11,  6,  7, 12,  0,  5, 14,  9));
138 198 
     VARIABLE int : std_logic_vector(0 TO 1);
139 199 
     VARIABLE i : integer RANGE 0 TO 3;
140 200 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -143,16 +203,11 @@ PACKAGE BODY des_pkg IS
143 203 
     int := input_vector( 0 ) & input_vector( 5 );
144 204 
     i := to_integer( unsigned( int ) );
145 205 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
146 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
206 
+    result := std_logic_vector( to_unsigned( s2_table( i, j ), 4 ) );
147 207 
     RETURN result;
148 208 
   END FUNCTION s2;
149 209
150 210 
   FUNCTION s3 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
151 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
152 
-    VARIABLE table  : matrix := (0 => (10,  0,  9, 14,  6,  3, 15,  5,  1, 13, 12,  7, 11,  4,  2,  8),
153 
-                                 1 => (13,  7,  0,  9,  3,  4,  6, 10,  2,  8,  5, 14, 12, 11, 15,  1),
154 
-                                 2 => (13,  6,  4,  9,  8, 15,  3,  0, 11,  1,  2, 12,  5, 10, 14,  7),
155 
-                                 3 => ( 1, 10, 13,  0,  6,  9,  8,  7,  4, 15, 14,  3, 11,  5,  2, 12));
156 211 
     VARIABLE int : std_logic_vector(0 TO 1);
157 212 
     VARIABLE i : integer RANGE 0 TO 3;
158 213 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -161,16 +216,11 @@ PACKAGE BODY des_pkg IS
161 216 
     int := input_vector( 0 ) & input_vector( 5 );
162 217 
     i := to_integer( unsigned( int ) );
163 218 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
164 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
219 
+    result := std_logic_vector( to_unsigned( s3_table( i, j ), 4 ) );
165 220 
     RETURN result;
166 221 
   END FUNCTION s3;
167 222
168 223 
   FUNCTION s4 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
169 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
170 
-    VARIABLE table  : matrix := (0 => ( 7, 13, 14,  3,  0,  6,  9, 10,  1,  2,  8,  5, 11, 12,  4,  15),
171 
-                                 1 => (13,  8, 11,  5,  6, 15,  0,  3,  4,  7,  2, 12,  1, 10, 14,   9),
172 
-                                 2 => (10,  6,  9,  0, 12, 11,  7, 13, 15,  1,  3, 14,  5,  2,  8,   4),
173 
-                                 3 => ( 3, 15,  0,  6, 10,  1, 13,  8,  9,  4,  5, 11, 12,  7,  2,  14));
174 224 
     VARIABLE int : std_logic_vector(0 TO 1);
175 225 
     VARIABLE i : integer RANGE 0 TO 3;
176 226 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -179,16 +229,11 @@ PACKAGE BODY des_pkg IS
179 229 
     int := input_vector( 0 ) & input_vector( 5 );
180 230 
     i := to_integer( unsigned( int ) );
181 231 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
182 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
232 
+    result := std_logic_vector( to_unsigned( s4_table( i, j ), 4 ) );
183 233 
     RETURN result;
184 234 
   END FUNCTION s4;
185 235
186 236 
   FUNCTION s5 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
187 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
188 
-    VARIABLE table  : matrix := (0 => ( 2, 12,  4,  1,  7, 10, 11,  6,  8,  5,  3, 15, 13,  0, 14,  9),
189 
-                                 1 => (14, 11,  2, 12,  4,  7, 13,  1,  5,  0, 15, 10,  3,  9,  8,  6),
190 
-                                 2 => ( 4,  2,  1, 11, 10, 13,  7,  8, 15,  9, 12,  5,  6,  3,  0, 14),
191 
-                                 3 => (11,  8, 12,  7,  1, 14,  2, 13,  6, 15,  0,  9, 10,  4,  5,  3));
192 237 
     VARIABLE int : std_logic_vector(0 TO 1);
193 238 
     VARIABLE i : integer RANGE 0 TO 3;
194 239 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -197,16 +242,11 @@ PACKAGE BODY des_pkg IS
197 242 
     int := input_vector( 0 ) & input_vector( 5 );
198 243 
     i := to_integer( unsigned( int ) );
199 244 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
200 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
245 
+    result := std_logic_vector( to_unsigned( s5_table( i, j ), 4 ) );
201 246 
     RETURN result;
202 247 
   END FUNCTION s5;
203 248
204 249 
   FUNCTION s6 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
205 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
206 
-    VARIABLE table  : matrix := (0 => (12,  1, 10, 15,  9,  2,  6,  8,  0, 13,  3,  4, 14,  7,  5, 11),
207 
-                                 1 => (10, 15,  4,  2,  7, 12,  9,  5,  6,  1, 13, 14,  0, 11,  3,  8),
208 
-                                 2 => ( 9, 14, 15,  5,  2,  8, 12,  3,  7,  0,  4, 10,  1, 13, 11,  6),
209 
-                                 3 => ( 4,  3,  2, 12,  9,  5, 15, 10, 11, 14,  1,  7,  6,  0,  8, 13));
210 250 
     VARIABLE int : std_logic_vector(0 TO 1);
211 251 
     VARIABLE i : integer RANGE 0 TO 3;
212 252 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -215,16 +255,11 @@ PACKAGE BODY des_pkg IS
215 255 
     int := input_vector( 0 ) & input_vector( 5 );
216 256 
     i := to_integer( unsigned( int ) );
217 257 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
218 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
258 
+    result := std_logic_vector( to_unsigned( s6_table( i, j ), 4 ) );
219 259 
     RETURN result;
220 260 
   END FUNCTION s6;
221 261
222 262 
   FUNCTION s7 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
223 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
224 
-    VARIABLE table  : matrix := (0 => ( 4, 11,  2, 14, 15,  0,  8, 13,  3, 12,  9,  7,  5, 10,  6,  1),
225 
-                                 1 => (13,  0, 11,  7,  4,  9,  1, 10, 14,  3,  5, 12,  2, 15,  8,  6),
226 
-                                 2 => ( 1,  4, 11, 13, 12,  3,  7, 14, 10, 15,  6,  8,  0,  5,  9,  2),
227 
-                                 3 => ( 6, 11, 13,  8,  1,  4, 10,  7,  9,  5,  0, 15, 14,  2,  3, 12));
228 263 
     VARIABLE int : std_logic_vector(0 TO 1);
229 264 
     VARIABLE i : integer RANGE 0 TO 3;
230 265 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -233,16 +268,11 @@ PACKAGE BODY des_pkg IS
233 268 
     int := input_vector( 0 ) & input_vector( 5 );
234 269 
     i := to_integer( unsigned( int ) );
235 270 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
236 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
271 
+    result := std_logic_vector( to_unsigned( s7_table( i, j ), 4 ) );
237 272 
     RETURN result;
238 273 
   END FUNCTION s7;
239 274
240 275 
   FUNCTION s8 ( input_vector : std_logic_vector(0 TO 5) ) RETURN std_logic_vector IS
241 
-    TYPE matrix IS ARRAY (0 TO 3, 0 TO 15) OF integer RANGE 0 TO 15;
242 
-    VARIABLE table  : matrix := (0 => (13,  2,  8,  4,  6, 15, 11,  1, 10,  9,  3, 14,  5,  0, 12,  7),
243 
-                                 1 => ( 1, 15, 13,  8, 10,  3,  7,  4, 12,  5,  6, 11,  0, 14,  9,  2),
244 
-                                 2 => ( 7, 11,  4,  1,  9, 12, 14,  2,  0,  6, 10, 13, 15,  3,  5,  8),
245 
-                                 3 => ( 2,  1, 14,  7,  4, 10,  8, 13, 15, 12,  9,  0,  3,  5,  6, 11));
246 276 
     VARIABLE int : std_logic_vector(0 TO 1);
247 277 
     VARIABLE i : integer RANGE 0 TO 3;
248 278 
     VARIABLE j : integer RANGE 0 TO 15;
 
@@ -251,24 +281,15 @@ PACKAGE BODY des_pkg IS
251 281 
     int := input_vector( 0 ) & input_vector( 5 );
252 282 
     i := to_integer( unsigned( int ) );
253 283 
     j := to_integer( unsigned( input_vector( 1 TO 4) ) );
254 
-    result := std_logic_vector( to_unsigned( table( i, j ), 4 ) );
284 
+    result := std_logic_vector( to_unsigned( s8_table( i, j ), 4 ) );
255 285 
     RETURN result;
256 286 
   END FUNCTION s8;
257 287
258 288 
   FUNCTION p (input_vector : std_logic_vector(0 TO 31) ) RETURN std_logic_vector IS
259 
-    TYPE matrix IS ARRAY (0 TO 31) OF natural RANGE 0 TO 31;
260 
-    VARIABLE table : matrix := (15,  6, 19, 20,
261 
-                                28, 11, 27, 16,
262 
-                                 0, 14, 22, 25,
263 
-                                 4, 17, 30,  9,
264 
-                                 1,  7, 23, 13,
265 
-                                31, 26,  2,  8,
266 
-                                18, 12, 29,  5,
267 
-                                21, 10,  3, 24);
268 289 
     VARIABLE result : std_logic_vector(0 TO 31);
269 290 
   BEGIN
270 291 
     FOR index IN 0 TO 31 LOOP
271 
-      result( index ) := input_vector( table( index ) );
292 
+      result( index ) := input_vector( p_table( index ) );
272 293 
     END LOOP;
273 294 
     RETURN result;
274 295 
   END FUNCTION p;
 
@@ -284,50 +305,32 @@ PACKAGE BODY des_pkg IS
284 305 
   END FUNCTION f;
285 306
286 307 
   FUNCTION pc1_c ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector IS
287 
-    TYPE matrix IS ARRAY (0 TO 27) OF natural RANGE 0 TO 63;
288 
-    VARIABLE table : matrix := (56, 48, 40, 32, 24, 16,  8,
289 
-                                 0, 57, 49, 41, 33, 25, 17,
290 
-                                 9,  1, 58, 50, 42, 34, 26,
291 
-                                18, 10,  2, 59, 51, 43, 35);
292 308 
     VARIABLE result : std_logic_vector(0 TO 27);
293 309 
   BEGIN
294 310 
     FOR index IN 0 TO 27 LOOP
295 
-      result( index ) := input_vector( table( index ) );
311 
+      result( index ) := input_vector( pc1c_table( index ) );
296 312 
     END LOOP;
297 313 
     RETURN result;
298 314 
   END FUNCTION pc1_c;
299 315
300 316 
   FUNCTION pc1_d ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector IS
301 
-    TYPE matrix IS ARRAY (0 TO 27) OF natural RANGE 0 TO 63;
302 
-    VARIABLE table : matrix := (62, 54, 46, 38, 30, 22, 14,
303 
-                                 6, 61, 53, 45, 37, 29, 21,
304 
-                                13,  5, 60, 52, 44, 36, 28,
305 
-                                20, 12,  4, 27, 19, 11,  3);
317 
+
306 318 
     VARIABLE result : std_logic_vector(0 TO 27);
307 319 
   BEGIN
308 320 
     FOR index IN 0 TO 27 LOOP
309 
-      result( index ) := input_vector( table( index ) );
321 
+      result( index ) := input_vector( pc1d_table( index ) );
310 322 
     END LOOP;
311 323 
     RETURN result;
312 324 
   END FUNCTION pc1_d;
313 325
314 326 
   FUNCTION pc2 ( input_vector : std_logic_vector(0 TO 55) ) RETURN std_logic_vector IS
315 
-    TYPE matrix IS ARRAY (0 TO 47) OF natural RANGE 0 TO 63;
316 
-    VARIABLE table : matrix := (13, 16, 10, 23,  0,  4,
317 
-                                 2, 27, 14,  5, 20,  9,
318 
-                                22, 18, 11,  3, 25,  7,
319 
-                                15,  6, 26, 19, 12,  1,
320 
-                                40, 51, 30, 36, 46, 54,
321 
-                                29, 39, 50, 44, 32, 47,
322 
-                                43, 48, 38, 55, 33, 52,
323 
-                                45, 41, 49, 35, 28, 31);
324 327 
     VARIABLE result : std_logic_vector(0 TO 47);
325 328 
   BEGIN
326 329 
     FOR index IN 0 TO 47 LOOP
327 
-      result( index ) := input_vector( table( index ) );
330 
+      result( index ) := input_vector( pc2_table( index ) );
328 331 
     END LOOP;
329 332 
     RETURN result;
330 333 
   END FUNCTION pc2;
331 334
332 335
333 
-END PACKAGE BODY des_pkg;
336 
+END PACKAGE BODY des_pkg;