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[wine] / dlls / winemp3.acm / dct64_i386.c
1 /*
2  * Copyright (c) Michael Hipp and other authors of the mpglib project.
3  *
4  * Discrete Cosine Transform (DCT) for subband synthesis
5  * optimized for machines with no auto-increment.
6  * The performance is highly compiler dependent. Maybe
7  * the dct64.c version for 'normal' processor may be faster
8  * even for Intel processors.
9  *
10  * This library is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * This library is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with this library; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23  */
24
25 #include "mpg123.h"
26
27 static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples)
28 {
29
30  {
31   register real *costab = pnts[0];
32
33   b1[0x00] = samples[0x00] + samples[0x1F];
34   b1[0x1F] = (samples[0x00] - samples[0x1F]) * costab[0x0];
35
36   b1[0x01] = samples[0x01] + samples[0x1E];
37   b1[0x1E] = (samples[0x01] - samples[0x1E]) * costab[0x1];
38
39   b1[0x02] = samples[0x02] + samples[0x1D];
40   b1[0x1D] = (samples[0x02] - samples[0x1D]) * costab[0x2];
41
42   b1[0x03] = samples[0x03] + samples[0x1C];
43   b1[0x1C] = (samples[0x03] - samples[0x1C]) * costab[0x3];
44
45   b1[0x04] = samples[0x04] + samples[0x1B];
46   b1[0x1B] = (samples[0x04] - samples[0x1B]) * costab[0x4];
47
48   b1[0x05] = samples[0x05] + samples[0x1A];
49   b1[0x1A] = (samples[0x05] - samples[0x1A]) * costab[0x5];
50
51   b1[0x06] = samples[0x06] + samples[0x19];
52   b1[0x19] = (samples[0x06] - samples[0x19]) * costab[0x6];
53
54   b1[0x07] = samples[0x07] + samples[0x18];
55   b1[0x18] = (samples[0x07] - samples[0x18]) * costab[0x7];
56
57   b1[0x08] = samples[0x08] + samples[0x17];
58   b1[0x17] = (samples[0x08] - samples[0x17]) * costab[0x8];
59
60   b1[0x09] = samples[0x09] + samples[0x16];
61   b1[0x16] = (samples[0x09] - samples[0x16]) * costab[0x9];
62
63   b1[0x0A] = samples[0x0A] + samples[0x15];
64   b1[0x15] = (samples[0x0A] - samples[0x15]) * costab[0xA];
65
66   b1[0x0B] = samples[0x0B] + samples[0x14];
67   b1[0x14] = (samples[0x0B] - samples[0x14]) * costab[0xB];
68
69   b1[0x0C] = samples[0x0C] + samples[0x13];
70   b1[0x13] = (samples[0x0C] - samples[0x13]) * costab[0xC];
71
72   b1[0x0D] = samples[0x0D] + samples[0x12];
73   b1[0x12] = (samples[0x0D] - samples[0x12]) * costab[0xD];
74
75   b1[0x0E] = samples[0x0E] + samples[0x11];
76   b1[0x11] = (samples[0x0E] - samples[0x11]) * costab[0xE];
77
78   b1[0x0F] = samples[0x0F] + samples[0x10];
79   b1[0x10] = (samples[0x0F] - samples[0x10]) * costab[0xF];
80  }
81
82
83  {
84   register real *costab = pnts[1];
85
86   b2[0x00] = b1[0x00] + b1[0x0F];
87   b2[0x0F] = (b1[0x00] - b1[0x0F]) * costab[0];
88   b2[0x01] = b1[0x01] + b1[0x0E];
89   b2[0x0E] = (b1[0x01] - b1[0x0E]) * costab[1];
90   b2[0x02] = b1[0x02] + b1[0x0D];
91   b2[0x0D] = (b1[0x02] - b1[0x0D]) * costab[2];
92   b2[0x03] = b1[0x03] + b1[0x0C];
93   b2[0x0C] = (b1[0x03] - b1[0x0C]) * costab[3];
94   b2[0x04] = b1[0x04] + b1[0x0B];
95   b2[0x0B] = (b1[0x04] - b1[0x0B]) * costab[4];
96   b2[0x05] = b1[0x05] + b1[0x0A];
97   b2[0x0A] = (b1[0x05] - b1[0x0A]) * costab[5];
98   b2[0x06] = b1[0x06] + b1[0x09];
99   b2[0x09] = (b1[0x06] - b1[0x09]) * costab[6];
100   b2[0x07] = b1[0x07] + b1[0x08];
101   b2[0x08] = (b1[0x07] - b1[0x08]) * costab[7];
102
103   b2[0x10] = b1[0x10] + b1[0x1F];
104   b2[0x1F] = (b1[0x1F] - b1[0x10]) * costab[0];
105   b2[0x11] = b1[0x11] + b1[0x1E];
106   b2[0x1E] = (b1[0x1E] - b1[0x11]) * costab[1];
107   b2[0x12] = b1[0x12] + b1[0x1D];
108   b2[0x1D] = (b1[0x1D] - b1[0x12]) * costab[2];
109   b2[0x13] = b1[0x13] + b1[0x1C];
110   b2[0x1C] = (b1[0x1C] - b1[0x13]) * costab[3];
111   b2[0x14] = b1[0x14] + b1[0x1B];
112   b2[0x1B] = (b1[0x1B] - b1[0x14]) * costab[4];
113   b2[0x15] = b1[0x15] + b1[0x1A];
114   b2[0x1A] = (b1[0x1A] - b1[0x15]) * costab[5];
115   b2[0x16] = b1[0x16] + b1[0x19];
116   b2[0x19] = (b1[0x19] - b1[0x16]) * costab[6];
117   b2[0x17] = b1[0x17] + b1[0x18];
118   b2[0x18] = (b1[0x18] - b1[0x17]) * costab[7];
119  }
120
121  {
122   register real *costab = pnts[2];
123
124   b1[0x00] = b2[0x00] + b2[0x07];
125   b1[0x07] = (b2[0x00] - b2[0x07]) * costab[0];
126   b1[0x01] = b2[0x01] + b2[0x06];
127   b1[0x06] = (b2[0x01] - b2[0x06]) * costab[1];
128   b1[0x02] = b2[0x02] + b2[0x05];
129   b1[0x05] = (b2[0x02] - b2[0x05]) * costab[2];
130   b1[0x03] = b2[0x03] + b2[0x04];
131   b1[0x04] = (b2[0x03] - b2[0x04]) * costab[3];
132
133   b1[0x08] = b2[0x08] + b2[0x0F];
134   b1[0x0F] = (b2[0x0F] - b2[0x08]) * costab[0];
135   b1[0x09] = b2[0x09] + b2[0x0E];
136   b1[0x0E] = (b2[0x0E] - b2[0x09]) * costab[1];
137   b1[0x0A] = b2[0x0A] + b2[0x0D];
138   b1[0x0D] = (b2[0x0D] - b2[0x0A]) * costab[2];
139   b1[0x0B] = b2[0x0B] + b2[0x0C];
140   b1[0x0C] = (b2[0x0C] - b2[0x0B]) * costab[3];
141
142   b1[0x10] = b2[0x10] + b2[0x17];
143   b1[0x17] = (b2[0x10] - b2[0x17]) * costab[0];
144   b1[0x11] = b2[0x11] + b2[0x16];
145   b1[0x16] = (b2[0x11] - b2[0x16]) * costab[1];
146   b1[0x12] = b2[0x12] + b2[0x15];
147   b1[0x15] = (b2[0x12] - b2[0x15]) * costab[2];
148   b1[0x13] = b2[0x13] + b2[0x14];
149   b1[0x14] = (b2[0x13] - b2[0x14]) * costab[3];
150
151   b1[0x18] = b2[0x18] + b2[0x1F];
152   b1[0x1F] = (b2[0x1F] - b2[0x18]) * costab[0];
153   b1[0x19] = b2[0x19] + b2[0x1E];
154   b1[0x1E] = (b2[0x1E] - b2[0x19]) * costab[1];
155   b1[0x1A] = b2[0x1A] + b2[0x1D];
156   b1[0x1D] = (b2[0x1D] - b2[0x1A]) * costab[2];
157   b1[0x1B] = b2[0x1B] + b2[0x1C];
158   b1[0x1C] = (b2[0x1C] - b2[0x1B]) * costab[3];
159  }
160
161  {
162   register real const cos0 = pnts[3][0];
163   register real const cos1 = pnts[3][1];
164
165   b2[0x00] = b1[0x00] + b1[0x03];
166   b2[0x03] = (b1[0x00] - b1[0x03]) * cos0;
167   b2[0x01] = b1[0x01] + b1[0x02];
168   b2[0x02] = (b1[0x01] - b1[0x02]) * cos1;
169
170   b2[0x04] = b1[0x04] + b1[0x07];
171   b2[0x07] = (b1[0x07] - b1[0x04]) * cos0;
172   b2[0x05] = b1[0x05] + b1[0x06];
173   b2[0x06] = (b1[0x06] - b1[0x05]) * cos1;
174
175   b2[0x08] = b1[0x08] + b1[0x0B];
176   b2[0x0B] = (b1[0x08] - b1[0x0B]) * cos0;
177   b2[0x09] = b1[0x09] + b1[0x0A];
178   b2[0x0A] = (b1[0x09] - b1[0x0A]) * cos1;
179
180   b2[0x0C] = b1[0x0C] + b1[0x0F];
181   b2[0x0F] = (b1[0x0F] - b1[0x0C]) * cos0;
182   b2[0x0D] = b1[0x0D] + b1[0x0E];
183   b2[0x0E] = (b1[0x0E] - b1[0x0D]) * cos1;
184
185   b2[0x10] = b1[0x10] + b1[0x13];
186   b2[0x13] = (b1[0x10] - b1[0x13]) * cos0;
187   b2[0x11] = b1[0x11] + b1[0x12];
188   b2[0x12] = (b1[0x11] - b1[0x12]) * cos1;
189
190   b2[0x14] = b1[0x14] + b1[0x17];
191   b2[0x17] = (b1[0x17] - b1[0x14]) * cos0;
192   b2[0x15] = b1[0x15] + b1[0x16];
193   b2[0x16] = (b1[0x16] - b1[0x15]) * cos1;
194
195   b2[0x18] = b1[0x18] + b1[0x1B];
196   b2[0x1B] = (b1[0x18] - b1[0x1B]) * cos0;
197   b2[0x19] = b1[0x19] + b1[0x1A];
198   b2[0x1A] = (b1[0x19] - b1[0x1A]) * cos1;
199
200   b2[0x1C] = b1[0x1C] + b1[0x1F];
201   b2[0x1F] = (b1[0x1F] - b1[0x1C]) * cos0;
202   b2[0x1D] = b1[0x1D] + b1[0x1E];
203   b2[0x1E] = (b1[0x1E] - b1[0x1D]) * cos1;
204  }
205
206  {
207   register real const cos0 = pnts[4][0];
208
209   b1[0x00] = b2[0x00] + b2[0x01];
210   b1[0x01] = (b2[0x00] - b2[0x01]) * cos0;
211   b1[0x02] = b2[0x02] + b2[0x03];
212   b1[0x03] = (b2[0x03] - b2[0x02]) * cos0;
213   b1[0x02] += b1[0x03];
214
215   b1[0x04] = b2[0x04] + b2[0x05];
216   b1[0x05] = (b2[0x04] - b2[0x05]) * cos0;
217   b1[0x06] = b2[0x06] + b2[0x07];
218   b1[0x07] = (b2[0x07] - b2[0x06]) * cos0;
219   b1[0x06] += b1[0x07];
220   b1[0x04] += b1[0x06];
221   b1[0x06] += b1[0x05];
222   b1[0x05] += b1[0x07];
223
224   b1[0x08] = b2[0x08] + b2[0x09];
225   b1[0x09] = (b2[0x08] - b2[0x09]) * cos0;
226   b1[0x0A] = b2[0x0A] + b2[0x0B];
227   b1[0x0B] = (b2[0x0B] - b2[0x0A]) * cos0;
228   b1[0x0A] += b1[0x0B];
229
230   b1[0x0C] = b2[0x0C] + b2[0x0D];
231   b1[0x0D] = (b2[0x0C] - b2[0x0D]) * cos0;
232   b1[0x0E] = b2[0x0E] + b2[0x0F];
233   b1[0x0F] = (b2[0x0F] - b2[0x0E]) * cos0;
234   b1[0x0E] += b1[0x0F];
235   b1[0x0C] += b1[0x0E];
236   b1[0x0E] += b1[0x0D];
237   b1[0x0D] += b1[0x0F];
238
239   b1[0x10] = b2[0x10] + b2[0x11];
240   b1[0x11] = (b2[0x10] - b2[0x11]) * cos0;
241   b1[0x12] = b2[0x12] + b2[0x13];
242   b1[0x13] = (b2[0x13] - b2[0x12]) * cos0;
243   b1[0x12] += b1[0x13];
244
245   b1[0x14] = b2[0x14] + b2[0x15];
246   b1[0x15] = (b2[0x14] - b2[0x15]) * cos0;
247   b1[0x16] = b2[0x16] + b2[0x17];
248   b1[0x17] = (b2[0x17] - b2[0x16]) * cos0;
249   b1[0x16] += b1[0x17];
250   b1[0x14] += b1[0x16];
251   b1[0x16] += b1[0x15];
252   b1[0x15] += b1[0x17];
253
254   b1[0x18] = b2[0x18] + b2[0x19];
255   b1[0x19] = (b2[0x18] - b2[0x19]) * cos0;
256   b1[0x1A] = b2[0x1A] + b2[0x1B];
257   b1[0x1B] = (b2[0x1B] - b2[0x1A]) * cos0;
258   b1[0x1A] += b1[0x1B];
259
260   b1[0x1C] = b2[0x1C] + b2[0x1D];
261   b1[0x1D] = (b2[0x1C] - b2[0x1D]) * cos0;
262   b1[0x1E] = b2[0x1E] + b2[0x1F];
263   b1[0x1F] = (b2[0x1F] - b2[0x1E]) * cos0;
264   b1[0x1E] += b1[0x1F];
265   b1[0x1C] += b1[0x1E];
266   b1[0x1E] += b1[0x1D];
267   b1[0x1D] += b1[0x1F];
268  }
269
270  out0[0x10*16] = b1[0x00];
271  out0[0x10*12] = b1[0x04];
272  out0[0x10* 8] = b1[0x02];
273  out0[0x10* 4] = b1[0x06];
274  out0[0x10* 0] = b1[0x01];
275  out1[0x10* 0] = b1[0x01];
276  out1[0x10* 4] = b1[0x05];
277  out1[0x10* 8] = b1[0x03];
278  out1[0x10*12] = b1[0x07];
279
280  b1[0x08] += b1[0x0C];
281  out0[0x10*14] = b1[0x08];
282  b1[0x0C] += b1[0x0a];
283  out0[0x10*10] = b1[0x0C];
284  b1[0x0A] += b1[0x0E];
285  out0[0x10* 6] = b1[0x0A];
286  b1[0x0E] += b1[0x09];
287  out0[0x10* 2] = b1[0x0E];
288  b1[0x09] += b1[0x0D];
289  out1[0x10* 2] = b1[0x09];
290  b1[0x0D] += b1[0x0B];
291  out1[0x10* 6] = b1[0x0D];
292  b1[0x0B] += b1[0x0F];
293  out1[0x10*10] = b1[0x0B];
294  out1[0x10*14] = b1[0x0F];
295
296  b1[0x18] += b1[0x1C];
297  out0[0x10*15] = b1[0x10] + b1[0x18];
298  out0[0x10*13] = b1[0x18] + b1[0x14];
299  b1[0x1C] += b1[0x1a];
300  out0[0x10*11] = b1[0x14] + b1[0x1C];
301  out0[0x10* 9] = b1[0x1C] + b1[0x12];
302  b1[0x1A] += b1[0x1E];
303  out0[0x10* 7] = b1[0x12] + b1[0x1A];
304  out0[0x10* 5] = b1[0x1A] + b1[0x16];
305  b1[0x1E] += b1[0x19];
306  out0[0x10* 3] = b1[0x16] + b1[0x1E];
307  out0[0x10* 1] = b1[0x1E] + b1[0x11];
308  b1[0x19] += b1[0x1D];
309  out1[0x10* 1] = b1[0x11] + b1[0x19];
310  out1[0x10* 3] = b1[0x19] + b1[0x15];
311  b1[0x1D] += b1[0x1B];
312  out1[0x10* 5] = b1[0x15] + b1[0x1D];
313  out1[0x10* 7] = b1[0x1D] + b1[0x13];
314  b1[0x1B] += b1[0x1F];
315  out1[0x10* 9] = b1[0x13] + b1[0x1B];
316  out1[0x10*11] = b1[0x1B] + b1[0x17];
317  out1[0x10*13] = b1[0x17] + b1[0x1F];
318  out1[0x10*15] = b1[0x1F];
319 }
320
321 /*
322  * the call via dct64 is a trick to force GCC to use
323  * (new) registers for the b1,b2 pointer to the bufs[xx] field
324  */
325 void dct64(real *a,real *b,real *c)
326 {
327   real bufs[0x40];
328   dct64_1(a,b,bufs,bufs+0x20,c);
329 }