summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/r2crypt.c
blob: 335163e4a3d3e33831b4c3fdfc01e3f03fb567d0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
/* Raiden 2 Sprite Decryption */

#include "emu.h"
#include "includes/raiden2.h"

/* INIT */

static const int swx[32] = {
  25, 28, 15, 19,  6,  0,  3, 24,
  11,  1,  2, 30, 16,  7, 22, 17,
  31, 14, 23,  9, 27, 18,  4, 10,
  13, 20,  5, 12,  8, 29, 26, 21,
};

static UINT32 sw(UINT32 v)
{
  UINT32 r = 0;
  int i;
  for(i=0; i<32; i++)
    if(v & (1 << swx[i]))
      r |= 1 << (31-i);
  return r;
}

static const UINT8 rotate[512] = {
  0x11, 0x17, 0x0d, 0x03, 0x17, 0x1f, 0x08, 0x1a, 0x0f, 0x04, 0x1e, 0x13, 0x19, 0x0e, 0x0e, 0x05,
  0x06, 0x07, 0x08, 0x08, 0x0d, 0x18, 0x11, 0x1a, 0x0b, 0x06, 0x12, 0x0c, 0x1f, 0x0b, 0x1c, 0x19,
  0x00, 0x1b, 0x0c, 0x09, 0x1d, 0x18, 0x1a, 0x16, 0x1a, 0x08, 0x03, 0x04, 0x0f, 0x1d, 0x16, 0x07,
  0x1a, 0x12, 0x01, 0x0b, 0x00, 0x0f, 0x1e, 0x10, 0x09, 0x0f, 0x10, 0x09, 0x0a, 0x1c, 0x0d, 0x08,
  0x06, 0x1a, 0x06, 0x02, 0x11, 0x1e, 0x0c, 0x1c, 0x11, 0x0f, 0x19, 0x0a, 0x16, 0x14, 0x18, 0x11,
  0x0b, 0x0d, 0x1c, 0x1f, 0x0d, 0x1f, 0x0d, 0x19, 0x0d, 0x04, 0x19, 0x0f, 0x06, 0x13, 0x0c, 0x1b,
  0x1f, 0x12, 0x15, 0x1a, 0x04, 0x02, 0x06, 0x03, 0x0a, 0x0d, 0x12, 0x09, 0x17, 0x1d, 0x12, 0x10,
  0x05, 0x07, 0x03, 0x00, 0x14, 0x07, 0x14, 0x1a, 0x1c, 0x0a, 0x10, 0x0f, 0x0b, 0x0c, 0x08, 0x0f,
  0x07, 0x00, 0x13, 0x1c, 0x04, 0x15, 0x0e, 0x02, 0x17, 0x17, 0x00, 0x03, 0x18, 0x00, 0x02, 0x13,
  0x14, 0x0c, 0x01, 0x0a, 0x15, 0x0b, 0x0a, 0x1c, 0x1b, 0x06, 0x17, 0x1d, 0x11, 0x1f, 0x10, 0x04,
  0x1a, 0x01, 0x1b, 0x13, 0x03, 0x09, 0x09, 0x0f, 0x0d, 0x03, 0x15, 0x1c, 0x04, 0x06, 0x06, 0x0b,
  0x04, 0x0a, 0x1f, 0x16, 0x11, 0x0a, 0x05, 0x05, 0x0c, 0x1c, 0x10, 0x0c, 0x11, 0x04, 0x10, 0x1a,
  0x06, 0x10, 0x19, 0x06, 0x15, 0x0f, 0x11, 0x01, 0x10, 0x0c, 0x1d, 0x05, 0x1f, 0x05, 0x12, 0x16,
  0x02, 0x12, 0x14, 0x0d, 0x14, 0x0f, 0x04, 0x07, 0x13, 0x01, 0x11, 0x1c, 0x1c, 0x1d, 0x0e, 0x06,
  0x1d, 0x13, 0x10, 0x06, 0x0f, 0x02, 0x12, 0x10, 0x1e, 0x0c, 0x17, 0x15, 0x0b, 0x1f, 0x01, 0x19,
  0x02, 0x01, 0x07, 0x1d, 0x13, 0x19, 0x0f, 0x0f, 0x10, 0x03, 0x1e, 0x03, 0x0d, 0x0a, 0x0c, 0x0d,

  0x16, 0x1f, 0x16, 0x1a, 0x1c, 0x16, 0x01, 0x03, 0x01, 0x08, 0x14, 0x19, 0x03, 0x1e, 0x08, 0x02,
  0x02, 0x1d, 0x15, 0x00, 0x09, 0x1d, 0x03, 0x11, 0x11, 0x0b, 0x1b, 0x14, 0x01, 0x1e, 0x11, 0x12,
  0x1d, 0x06, 0x0b, 0x13, 0x1e, 0x16, 0x0d, 0x10, 0x11, 0x1f, 0x1c, 0x15, 0x0d, 0x1a, 0x13, 0x1f,
  0x0e, 0x05, 0x10, 0x06, 0x0d, 0x1c, 0x07, 0x19, 0x06, 0x1d, 0x11, 0x00, 0x1c, 0x05, 0x0b, 0x1d,
  0x1c, 0x06, 0x05, 0x1d, 0x00, 0x13, 0x00, 0x12, 0x1b, 0x17, 0x1a, 0x1b, 0x17, 0x1c, 0x16, 0x0a,
  0x11, 0x15, 0x0f, 0x0b, 0x0f, 0x07, 0x0e, 0x04, 0x13, 0x00, 0x1c, 0x05, 0x16, 0x00, 0x1a, 0x04,
  0x17, 0x04, 0x08, 0x1b, 0x05, 0x12, 0x1d, 0x0d, 0x02, 0x16, 0x12, 0x0e, 0x06, 0x08, 0x14, 0x07,
  0x0e, 0x0f, 0x15, 0x13, 0x12, 0x00, 0x1d, 0x16, 0x1b, 0x18, 0x1f, 0x05, 0x12, 0x13, 0x01, 0x0c,
  0x12, 0x04, 0x19, 0x13, 0x12, 0x15, 0x07, 0x06, 0x0a, 0x00, 0x09, 0x14, 0x1e, 0x03, 0x10, 0x1b,
  0x08, 0x1a, 0x07, 0x02, 0x1b, 0x0d, 0x18, 0x13, 0x02, 0x07, 0x1e, 0x05, 0x15, 0x02, 0x06, 0x18,
  0x12, 0x09, 0x1c, 0x07, 0x0b, 0x02, 0x03, 0x00, 0x18, 0x18, 0x03, 0x0f, 0x02, 0x0f, 0x10, 0x09,
  0x05, 0x18, 0x08, 0x1b, 0x0d, 0x10, 0x03, 0x00, 0x0c, 0x14, 0x1d, 0x08, 0x02, 0x10, 0x0b, 0x0c,
  0x00, 0x0d, 0x0d, 0x0a, 0x06, 0x1c, 0x09, 0x19, 0x1b, 0x14, 0x18, 0x0f, 0x02, 0x07, 0x05, 0x04,
  0x1c, 0x15, 0x18, 0x00, 0x0b, 0x10, 0x19, 0x1c, 0x1b, 0x08, 0x1d, 0x12, 0x17, 0x1d, 0x0c, 0x01,
  0x03, 0x0d, 0x03, 0x0d, 0x15, 0x0e, 0x16, 0x08, 0x05, 0x11, 0x1f, 0x03, 0x16, 0x03, 0x0f, 0x10,
  0x08, 0x19, 0x18, 0x15, 0x1f, 0x05, 0x00, 0x09, 0x0e, 0x05, 0x16, 0x1b, 0x01, 0x08, 0x08, 0x1f,
};


static const UINT32 xmap_low_01[8] = { 0x915b174c, 0xd1e3d41d, 0x7afd901e, 0x890aeda6, 0xdaa66bf6, 0xcf3a5859, 0x1fc8ae80, 0xd7c864c2 };
static const UINT32 xmap_low_03[8] = { 0xc9b43501, 0x2d4136ef, 0x5a3e2047, 0xccab4852, 0x67770213, 0xcc1c22ee, 0x7f767fe5, 0xae783fa3 };
static const UINT32 xmap_low_07[8] = { 0x533ce0ff, 0x21561e2b, 0x5e52735b, 0x2f89d3c0, 0x383ee980, 0x807ae78a, 0x6dfab360, 0xccd84e92 };
static const UINT32 xmap_low_23[8] = { 0xa3b39673, 0xb3a21d4a, 0x07440937, 0xa9005a05, 0x12bbf9d7, 0x257164a7, 0x6162a1e4, 0x862c5d73 };

static const UINT32 xmap_low_31[8] = { 0x76fa8a84, 0x2f3f4960, 0x82087362, 0x40aebf9e, 0x02854535, 0xfcbd325a, 0x7b8823f3, 0xcbd62b3a };

static const UINT32 xmap_high_00[8] = { 0x1bf05217, 0xe2b31951, 0x0458ee47, 0x6c06f22c, 0x3f1a7bad, 0xb658f2e4, 0xa2b24b18, 0x3cddd22f };
static const UINT32 xmap_high_02[8] = { 0x3caa374d, 0xfabf45a5, 0x2633d9ba, 0x05573b6a, 0x03234029, 0x185b17b0, 0x53afc974, 0x2067077d };
static const UINT32 xmap_high_03[8] = { 0xdb36b4d7, 0x1e79e916, 0xfcc75654, 0x8b552464, 0x856a3eb4, 0xb60c7c2e, 0xf325d2ee, 0x5cbd9b38 };
static const UINT32 xmap_high_04[8] = { 0x91a1acfe, 0x5adaac01, 0x9dc40024, 0x1c87c08b, 0x34ab1b76, 0x631175d5, 0x017b85e6, 0x13359cd1 };
static const UINT32 xmap_high_06[8] = { 0xd46b6286, 0x2da93768, 0xf95f5b47, 0x657b472e, 0x05ed940f, 0x86364f88, 0x863d5fed, 0xe3f1ef82 };
static const UINT32 xmap_high_21[8] = { 0x1d51f8b6, 0xcc1b30b3, 0x9bf75b9d, 0x2c57e2cd, 0x3b5138de, 0xba5c69c4, 0x422c4b8e, 0xd5465cf6 };
static const UINT32 xmap_high_20[8] = { 0x41d4146c, 0x536d7b04, 0x59d60240, 0x7d01cc23, 0x8a0e5ce4, 0x11e0b0db, 0x513381e1, 0x3264be61 };
static const UINT32 xmap_high_10[8] = { 0xc04f0362, 0x44fa6936, 0xc048b0db, 0x704897b2, 0x7e28568f, 0xfb9e070f, 0xc34a5704, 0xd5888a6f };
static const UINT32 xmap_high_11[8] = { 0xd88e9b92, 0xda49726b, 0xc13f86b7, 0x6ce2a1b0, 0xb3adc6e9, 0xd83c2f64, 0xa14c1efc, 0xe98a3c19 };
static const UINT32 xmap_high_13[8] = { 0x03f8a061, 0x19f39b5a, 0x13a17ae2, 0x85c06682, 0x42118566, 0x78e4ff8a, 0xbee64f97, 0x5eecb443 };
static const UINT32 xmap_high_15[8] = { 0x1c6f2b4f, 0x9eebe281, 0x784b85d8, 0x401d6412, 0x0370ae0a, 0xa791d0b3, 0x89d290ea, 0x4666f009 };

#if 0
static UINT32 xrot(UINT32 v, int r)
{
  return (v >> r) | (v << (32-r));
}
#endif

static UINT32 yrot(UINT32 v, int r)
{
  return (v << r) | (v >> (32-r));
}

static int bt(const UINT32 *tb, int v)
{
  return (tb[v/32] & (1<<(v % 32))) != 0;
}

static UINT32 gr(int i)
{
  int idx = i & 0xff;
  if(i & 0x008000)
    idx ^= 1;
  if(i & 0x100000)
    idx ^= 256;
  return rotate[idx];
}

static UINT32 gm(int i)
{
  unsigned int x;
  int idx = i & 0xff;
  int i1, i2;
  
  if(i & 0x008000)
    idx ^= 1;
  if(i & 0x100000)
    idx ^= 256;

  i1 = idx & 0xff;
  i2 = (i >> 8) & 0xff;

  x = 0x4c435012;

  if(bt(xmap_low_01, i1))
    x ^= 0x00401000;
  if(bt(xmap_low_03, i1))
    x ^= 0x01000800;
  if(bt(xmap_low_07, i1))
    x ^= 0x00044000;
  if(bt(xmap_low_23, i1))
    x ^= 0x00102000;
  if(bt(xmap_low_31, i1))
    x ^= 0x00008000;
  if(bt(xmap_high_00, i2))
    x ^= 0x0c000400;
  if(bt(xmap_high_02, i2))
    x ^= 0x00200020;
  if(bt(xmap_high_03, i2))
    x ^= 0x02000008;
  if(bt(xmap_high_04, i2))
    x ^= 0x10000200;
 if(bt(xmap_high_06, i2))
    x ^= 0x08000004;
  if(bt(xmap_high_21, i2))
    x ^= 0x80000001;
  if(bt(xmap_high_20, i2))
    x ^= 0x00080040;
  if(bt(xmap_high_10, i2))
    x ^= 0x40000100;
  if(bt(xmap_high_11, i2))
    x ^= 0x00800010;
  if(bt(xmap_high_13, i2))
    x ^= 0x00020080;
  if(bt(xmap_high_15, i2))
    x ^= 0x20000002;
  
  if(i & 0x010000)
    x ^= 0xaa00000f;
  if(i & 0x020000)
    x ^= 0x00aa00f0;
  if(i & 0x040000)
    x ^= 0x5d000f00;
  if(i & 0x080000)
    x ^= 0x0054f000;

  return x;
}

static UINT32 trans(UINT32 v, UINT32 x)
{
  unsigned y,r2,v2;
  
  v2 = (BIT(v,30)<<8)|(BIT(v,22)<<12)|(BIT(v,18)<<18)|(BIT(v,19)<<19)|(BIT(v,22)<<22)|(BIT(v,24)<<24)|(BIT(v,3)<<25)|(BIT(v,26)<<26)|(BIT(v,28)<<28);
  v2 ^= 0x01000000;
  
  r2 = 0;
  y = 0;

  y |= ((                              0 ^ BIT(x, 0) ^ BIT(v, 0))<< 0);
  y |= ((                              0 ^ BIT(x, 1) ^ BIT(v, 1))<< 1);
  y |= ((                              0 ^ BIT(x, 2) ^ BIT(v, 2))<< 2);
  y |= ((                              0 ^ BIT(x, 3) ^ BIT(v, 3))<< 3);
  y |= ((                              0 ^ BIT(x, 4) ^ BIT(v, 4))<< 4);
  y |= ((                              0 ^ BIT(x, 5) ^ BIT(v, 5))<< 5);
  y |= ((                              0 ^ BIT(x, 6) ^ BIT(v, 6))<< 6);
  y |= ((                              0 ^ BIT(x, 7) ^ BIT(v, 7))<< 7);
  y |= ((                              0 ^ BIT(x, 8) ^ BIT(v, 8))<< 8);
  y |= ((                              0 ^ BIT(x, 9) ^ BIT(v, 9))<< 9);
  y |= ((                              0 ^ BIT(x,10) ^ BIT(v,10))<<10);
  y |= ((                              0 ^ BIT(x,11) ^ BIT(v,11))<<11);
  y |= ((                              0 ^ BIT(x,12) ^ BIT(v,12))<<12);
  y |= ((                              0 ^ BIT(x,13) ^ BIT(v,13))<<13);
  y |= ((                              0 ^ BIT(x,14) ^ BIT(v,14))<<14);
  y |= ((                              0 ^ BIT(x,15) ^ BIT(v,15))<<15);
  y |= ((                              0 ^ BIT(x,16) ^ BIT(v,16))<<16);
  y |= ((                              0 ^ BIT(x,17) ^ BIT(v,17))<<17);
  y |= ((                              0 ^ BIT(x,18) ^ BIT(v,18))<<18);
  y |= ((                              1 ^ BIT(x,19) ^ BIT(v,19))<<19);
  y |= ((                      BIT(x,19) ^ BIT(x,20) ^ BIT(v,20))<<20);
  y |= ((                              0 ^ BIT(x,21) ^ BIT(v,21))<<21);
  y |= ((                              0 ^ BIT(x,22) ^ BIT(v,22))<<22);
  y |= ((                              0 ^ BIT(x,23) ^ BIT(v,23))<<23);
  y |= ((                              1 ^ BIT(x,24) ^ BIT(v,24))<<24);
  y |= ((                      BIT(x,24) ^ BIT(x,25) ^ BIT(v,25))<<25);
  y |= ((          (BIT(x,24)&BIT(x,25)) ^ BIT(x,26) ^ BIT(v,26))<<26);
  y |= (((BIT(x,24)&BIT(x,25)&BIT(x,26)) ^ BIT(x,27) ^ BIT(v,27))<<27);
  y |= ((                              0 ^ BIT(x,28) ^ BIT(v,28))<<28);
  y |= ((                              0 ^ BIT(x,29) ^ BIT(v,29))<<29);
  y |= ((                              0 ^ BIT(x,30) ^ BIT(v,30))<<30);
  y |= ((                              0 ^ BIT(x,31) ^ BIT(v,31))<<31);
  
  
  r2 |= (                     0<< 0);
  r2 |= (                     0<< 1);
  r2 |= (                     0<< 2);
  r2 |= (                     0<< 3);
  r2 |= (                     0<< 4);
  r2 |= (                     0<< 5);
  r2 |= (                     0<< 6);
  r2 |= (                     0<< 7);
  r2 |= (                     0<< 8);
  r2 |= ((BIT(v2, 8)&BIT(y, 8))<< 9);
  r2 |= (                     0<<10);
  r2 |= (                     0<<11);
  r2 |= (                     0<<12);
  r2 |= ((BIT(v2,12)&BIT(y,12))<<13);
  r2 |= (                     0<<14);
  r2 |= (                     0<<15);
  r2 |= (                     0<<16);
  r2 |= (                     0<<17);
  r2 |= (                     0<<18);
  r2 |= ((BIT(v2,18)&BIT(y,18))<<19);
  r2 |= ((BIT(v2,19)&BIT(y,19))<<20);
  r2 |= (                     0<<21);
  r2 |= (                     0<<22);
  r2 |= ((BIT(v2,22)&BIT(y,22))<<23);
  r2 |= (                     0<<24);
  r2 |= ((BIT(v2,24)&BIT(y,24))<<25);
  r2 |= ((BIT(v2,25)&BIT(y,25))<<26);
  r2 |= ((BIT(v2,26)&BIT(y,26))<<27);
  r2 |= (                     0<<28);
  r2 |= ((BIT(v2,28)&BIT(y,28))<<29);
  r2 |= (                     0<<30);
  r2 |= (                     0<<31);
  
  r2 ^= y;
  r2 ^= 0x0c500000;

  return r2;
}

void raiden2_decrypt_sprites(running_machine &machine)
{
  int i;
  UINT32 *data = (UINT32 *)machine.region("gfx3")->base();
  for(i=0; i<0x800000/4; i++) {
    UINT32 x1, v1, y1;

    int idx = i & 0xff;
    //int i2;
    //int idx2;

    //idx2 = ((i>>7) & 0x3ff) | ((i>>8) & 0x400);
    if(i & 0x008000)
      idx ^= 1;
    if(i & 0x100000)
      idx ^= 256;

    //i2 = i >> 8;

    v1 = sw(yrot(data[i], gr(i)));

    x1 = gm(i);

    y1 = ~trans(v1, x1);

    data[i] = y1;
  }
}

void zeroteam_decrypt_sprites(running_machine &machine)
{
	// TODO!
}