x86: move function prototypes to header files
[libav.git] / libavcodec / x86 / idct_mmx.c
1 /*
2 * idct_mmx.c
3 * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
4 *
5 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
6 * See http://libmpeg2.sourceforge.net/ for updates.
7 *
8 * mpeg2dec is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * mpeg2dec is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with mpeg2dec; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "libavutil/common.h"
24 #include "libavcodec/dsputil.h"
25
26 #include "dsputil_mmx.h"
27 #include "mmx.h"
28
29 #define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align)))
30
31 #define ROW_SHIFT 11
32 #define COL_SHIFT 6
33
34 #define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))
35 #define rounder(bias) {round (bias), round (bias)}
36
37
38 #if 0
39 /* C row IDCT - it is just here to document the MMXEXT and MMX versions */
40 static inline void idct_row (int16_t * row, int offset,
41 int16_t * table, int32_t * rounder)
42 {
43 int C1, C2, C3, C4, C5, C6, C7;
44 int a0, a1, a2, a3, b0, b1, b2, b3;
45
46 row += offset;
47
48 C1 = table[1];
49 C2 = table[2];
50 C3 = table[3];
51 C4 = table[4];
52 C5 = table[5];
53 C6 = table[6];
54 C7 = table[7];
55
56 a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder;
57 a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder;
58 a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder;
59 a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder;
60
61 b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
62 b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
63 b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
64 b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
65
66 row[0] = (a0 + b0) >> ROW_SHIFT;
67 row[1] = (a1 + b1) >> ROW_SHIFT;
68 row[2] = (a2 + b2) >> ROW_SHIFT;
69 row[3] = (a3 + b3) >> ROW_SHIFT;
70 row[4] = (a3 - b3) >> ROW_SHIFT;
71 row[5] = (a2 - b2) >> ROW_SHIFT;
72 row[6] = (a1 - b1) >> ROW_SHIFT;
73 row[7] = (a0 - b0) >> ROW_SHIFT;
74 }
75 #endif
76
77
78 /* MMXEXT row IDCT */
79
80 #define mmxext_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, -c4, -c2, \
81 c4, c6, c4, c6, \
82 c1, c3, -c1, -c5, \
83 c5, c7, c3, -c7, \
84 c4, -c6, c4, -c6, \
85 -c4, c2, c4, -c2, \
86 c5, -c1, c3, -c1, \
87 c7, c3, c7, -c5 }
88
89 static inline void mmxext_row_head (int16_t * const row, const int offset,
90 const int16_t * const table)
91 {
92 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
93
94 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
95 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
96
97 movq_m2r (*table, mm3); /* mm3 = -C2 -C4 C2 C4 */
98 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
99
100 movq_m2r (*(table+4), mm4); /* mm4 = C6 C4 C6 C4 */
101 pmaddwd_r2r (mm0, mm3); /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */
102
103 pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */
104 }
105
106 static inline void mmxext_row (const int16_t * const table,
107 const int32_t * const rounder)
108 {
109 movq_m2r (*(table+8), mm1); /* mm1 = -C5 -C1 C3 C1 */
110 pmaddwd_r2r (mm2, mm4); /* mm4 = C4*x0+C6*x2 C4*x4+C6*x6 */
111
112 pmaddwd_m2r (*(table+16), mm0); /* mm0 = C4*x4-C6*x6 C4*x0-C6*x2 */
113 pshufw_r2r (mm6, mm6, 0x4e); /* mm6 = x3 x1 x7 x5 */
114
115 movq_m2r (*(table+12), mm7); /* mm7 = -C7 C3 C7 C5 */
116 pmaddwd_r2r (mm5, mm1); /* mm1 = -C1*x5-C5*x7 C1*x1+C3*x3 */
117
118 paddd_m2r (*rounder, mm3); /* mm3 += rounder */
119 pmaddwd_r2r (mm6, mm7); /* mm7 = C3*x1-C7*x3 C5*x5+C7*x7 */
120
121 pmaddwd_m2r (*(table+20), mm2); /* mm2 = C4*x0-C2*x2 -C4*x4+C2*x6 */
122 paddd_r2r (mm4, mm3); /* mm3 = a1 a0 + rounder */
123
124 pmaddwd_m2r (*(table+24), mm5); /* mm5 = C3*x5-C1*x7 C5*x1-C1*x3 */
125 movq_r2r (mm3, mm4); /* mm4 = a1 a0 + rounder */
126
127 pmaddwd_m2r (*(table+28), mm6); /* mm6 = C7*x1-C5*x3 C7*x5+C3*x7 */
128 paddd_r2r (mm7, mm1); /* mm1 = b1 b0 */
129
130 paddd_m2r (*rounder, mm0); /* mm0 += rounder */
131 psubd_r2r (mm1, mm3); /* mm3 = a1-b1 a0-b0 + rounder */
132
133 psrad_i2r (ROW_SHIFT, mm3); /* mm3 = y6 y7 */
134 paddd_r2r (mm4, mm1); /* mm1 = a1+b1 a0+b0 + rounder */
135
136 paddd_r2r (mm2, mm0); /* mm0 = a3 a2 + rounder */
137 psrad_i2r (ROW_SHIFT, mm1); /* mm1 = y1 y0 */
138
139 paddd_r2r (mm6, mm5); /* mm5 = b3 b2 */
140 movq_r2r (mm0, mm4); /* mm4 = a3 a2 + rounder */
141
142 paddd_r2r (mm5, mm0); /* mm0 = a3+b3 a2+b2 + rounder */
143 psubd_r2r (mm5, mm4); /* mm4 = a3-b3 a2-b2 + rounder */
144 }
145
146 static inline void mmxext_row_tail (int16_t * const row, const int store)
147 {
148 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
149
150 psrad_i2r (ROW_SHIFT, mm4); /* mm4 = y4 y5 */
151
152 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
153
154 packssdw_r2r (mm3, mm4); /* mm4 = y6 y7 y4 y5 */
155
156 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
157 pshufw_r2r (mm4, mm4, 0xb1); /* mm4 = y7 y6 y5 y4 */
158
159 /* slot */
160
161 movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */
162 }
163
164 static inline void mmxext_row_mid (int16_t * const row, const int store,
165 const int offset,
166 const int16_t * const table)
167 {
168 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
169 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
170
171 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
172 psrad_i2r (ROW_SHIFT, mm4); /* mm4 = y4 y5 */
173
174 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
175 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
176
177 packssdw_r2r (mm3, mm4); /* mm4 = y6 y7 y4 y5 */
178 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
179
180 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
181 pshufw_r2r (mm4, mm4, 0xb1); /* mm4 = y7 y6 y5 y4 */
182
183 movq_m2r (*table, mm3); /* mm3 = -C2 -C4 C2 C4 */
184 movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */
185
186 pmaddwd_r2r (mm0, mm3); /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */
187
188 movq_m2r (*(table+4), mm4); /* mm4 = C6 C4 C6 C4 */
189 pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */
190 }
191
192
193 /* MMX row IDCT */
194
195 #define mmx_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, c4, c6, \
196 c4, c6, -c4, -c2, \
197 c1, c3, c3, -c7, \
198 c5, c7, -c1, -c5, \
199 c4, -c6, c4, -c2, \
200 -c4, c2, c4, -c6, \
201 c5, -c1, c7, -c5, \
202 c7, c3, c3, -c1 }
203
204 static inline void mmx_row_head (int16_t * const row, const int offset,
205 const int16_t * const table)
206 {
207 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
208
209 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
210 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
211
212 movq_m2r (*table, mm3); /* mm3 = C6 C4 C2 C4 */
213 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
214
215 punpckldq_r2r (mm0, mm0); /* mm0 = x2 x0 x2 x0 */
216
217 movq_m2r (*(table+4), mm4); /* mm4 = -C2 -C4 C6 C4 */
218 pmaddwd_r2r (mm0, mm3); /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */
219
220 movq_m2r (*(table+8), mm1); /* mm1 = -C7 C3 C3 C1 */
221 punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */
222 }
223
224 static inline void mmx_row (const int16_t * const table,
225 const int32_t * const rounder)
226 {
227 pmaddwd_r2r (mm2, mm4); /* mm4 = -C4*x4-C2*x6 C4*x4+C6*x6 */
228 punpckldq_r2r (mm5, mm5); /* mm5 = x3 x1 x3 x1 */
229
230 pmaddwd_m2r (*(table+16), mm0); /* mm0 = C4*x0-C2*x2 C4*x0-C6*x2 */
231 punpckhdq_r2r (mm6, mm6); /* mm6 = x7 x5 x7 x5 */
232
233 movq_m2r (*(table+12), mm7); /* mm7 = -C5 -C1 C7 C5 */
234 pmaddwd_r2r (mm5, mm1); /* mm1 = C3*x1-C7*x3 C1*x1+C3*x3 */
235
236 paddd_m2r (*rounder, mm3); /* mm3 += rounder */
237 pmaddwd_r2r (mm6, mm7); /* mm7 = -C1*x5-C5*x7 C5*x5+C7*x7 */
238
239 pmaddwd_m2r (*(table+20), mm2); /* mm2 = C4*x4-C6*x6 -C4*x4+C2*x6 */
240 paddd_r2r (mm4, mm3); /* mm3 = a1 a0 + rounder */
241
242 pmaddwd_m2r (*(table+24), mm5); /* mm5 = C7*x1-C5*x3 C5*x1-C1*x3 */
243 movq_r2r (mm3, mm4); /* mm4 = a1 a0 + rounder */
244
245 pmaddwd_m2r (*(table+28), mm6); /* mm6 = C3*x5-C1*x7 C7*x5+C3*x7 */
246 paddd_r2r (mm7, mm1); /* mm1 = b1 b0 */
247
248 paddd_m2r (*rounder, mm0); /* mm0 += rounder */
249 psubd_r2r (mm1, mm3); /* mm3 = a1-b1 a0-b0 + rounder */
250
251 psrad_i2r (ROW_SHIFT, mm3); /* mm3 = y6 y7 */
252 paddd_r2r (mm4, mm1); /* mm1 = a1+b1 a0+b0 + rounder */
253
254 paddd_r2r (mm2, mm0); /* mm0 = a3 a2 + rounder */
255 psrad_i2r (ROW_SHIFT, mm1); /* mm1 = y1 y0 */
256
257 paddd_r2r (mm6, mm5); /* mm5 = b3 b2 */
258 movq_r2r (mm0, mm7); /* mm7 = a3 a2 + rounder */
259
260 paddd_r2r (mm5, mm0); /* mm0 = a3+b3 a2+b2 + rounder */
261 psubd_r2r (mm5, mm7); /* mm7 = a3-b3 a2-b2 + rounder */
262 }
263
264 static inline void mmx_row_tail (int16_t * const row, const int store)
265 {
266 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
267
268 psrad_i2r (ROW_SHIFT, mm7); /* mm7 = y4 y5 */
269
270 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
271
272 packssdw_r2r (mm3, mm7); /* mm7 = y6 y7 y4 y5 */
273
274 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
275 movq_r2r (mm7, mm4); /* mm4 = y6 y7 y4 y5 */
276
277 pslld_i2r (16, mm7); /* mm7 = y7 0 y5 0 */
278
279 psrld_i2r (16, mm4); /* mm4 = 0 y6 0 y4 */
280
281 por_r2r (mm4, mm7); /* mm7 = y7 y6 y5 y4 */
282
283 /* slot */
284
285 movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */
286 }
287
288 static inline void mmx_row_mid (int16_t * const row, const int store,
289 const int offset, const int16_t * const table)
290 {
291 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
292 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
293
294 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
295 psrad_i2r (ROW_SHIFT, mm7); /* mm7 = y4 y5 */
296
297 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
298 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
299
300 packssdw_r2r (mm3, mm7); /* mm7 = y6 y7 y4 y5 */
301 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
302
303 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
304 movq_r2r (mm7, mm1); /* mm1 = y6 y7 y4 y5 */
305
306 punpckldq_r2r (mm0, mm0); /* mm0 = x2 x0 x2 x0 */
307 psrld_i2r (16, mm7); /* mm7 = 0 y6 0 y4 */
308
309 movq_m2r (*table, mm3); /* mm3 = C6 C4 C2 C4 */
310 pslld_i2r (16, mm1); /* mm1 = y7 0 y5 0 */
311
312 movq_m2r (*(table+4), mm4); /* mm4 = -C2 -C4 C6 C4 */
313 por_r2r (mm1, mm7); /* mm7 = y7 y6 y5 y4 */
314
315 movq_m2r (*(table+8), mm1); /* mm1 = -C7 C3 C3 C1 */
316 punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */
317
318 movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */
319 pmaddwd_r2r (mm0, mm3); /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */
320 }
321
322
323 #if 0
324 /* C column IDCT - it is just here to document the MMXEXT and MMX versions */
325 static inline void idct_col (int16_t * col, int offset)
326 {
327 /* multiplication - as implemented on mmx */
328 #define F(c,x) (((c) * (x)) >> 16)
329
330 /* saturation - it helps us handle torture test cases */
331 #define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x))
332
333 int16_t x0, x1, x2, x3, x4, x5, x6, x7;
334 int16_t y0, y1, y2, y3, y4, y5, y6, y7;
335 int16_t a0, a1, a2, a3, b0, b1, b2, b3;
336 int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12;
337
338 col += offset;
339
340 x0 = col[0*8];
341 x1 = col[1*8];
342 x2 = col[2*8];
343 x3 = col[3*8];
344 x4 = col[4*8];
345 x5 = col[5*8];
346 x6 = col[6*8];
347 x7 = col[7*8];
348
349 u04 = S (x0 + x4);
350 v04 = S (x0 - x4);
351 u26 = S (F (T2, x6) + x2);
352 v26 = S (F (T2, x2) - x6);
353
354 a0 = S (u04 + u26);
355 a1 = S (v04 + v26);
356 a2 = S (v04 - v26);
357 a3 = S (u04 - u26);
358
359 u17 = S (F (T1, x7) + x1);
360 v17 = S (F (T1, x1) - x7);
361 u35 = S (F (T3, x5) + x3);
362 v35 = S (F (T3, x3) - x5);
363
364 b0 = S (u17 + u35);
365 b3 = S (v17 - v35);
366 u12 = S (u17 - u35);
367 v12 = S (v17 + v35);
368 u12 = S (2 * F (C4, u12));
369 v12 = S (2 * F (C4, v12));
370 b1 = S (u12 + v12);
371 b2 = S (u12 - v12);
372
373 y0 = S (a0 + b0) >> COL_SHIFT;
374 y1 = S (a1 + b1) >> COL_SHIFT;
375 y2 = S (a2 + b2) >> COL_SHIFT;
376 y3 = S (a3 + b3) >> COL_SHIFT;
377
378 y4 = S (a3 - b3) >> COL_SHIFT;
379 y5 = S (a2 - b2) >> COL_SHIFT;
380 y6 = S (a1 - b1) >> COL_SHIFT;
381 y7 = S (a0 - b0) >> COL_SHIFT;
382
383 col[0*8] = y0;
384 col[1*8] = y1;
385 col[2*8] = y2;
386 col[3*8] = y3;
387 col[4*8] = y4;
388 col[5*8] = y5;
389 col[6*8] = y6;
390 col[7*8] = y7;
391 }
392 #endif
393
394
395 /* MMX column IDCT */
396 static inline void idct_col (int16_t * const col, const int offset)
397 {
398 #define T1 13036
399 #define T2 27146
400 #define T3 43790
401 #define C4 23170
402
403 static const short t1_vector[] ATTR_ALIGN(8) = {T1,T1,T1,T1};
404 static const short t2_vector[] ATTR_ALIGN(8) = {T2,T2,T2,T2};
405 static const short t3_vector[] ATTR_ALIGN(8) = {T3,T3,T3,T3};
406 static const short c4_vector[] ATTR_ALIGN(8) = {C4,C4,C4,C4};
407
408 /* column code adapted from Peter Gubanov */
409 /* http://www.elecard.com/peter/idct.shtml */
410
411 movq_m2r (*t1_vector, mm0); /* mm0 = T1 */
412
413 movq_m2r (*(col+offset+1*8), mm1); /* mm1 = x1 */
414 movq_r2r (mm0, mm2); /* mm2 = T1 */
415
416 movq_m2r (*(col+offset+7*8), mm4); /* mm4 = x7 */
417 pmulhw_r2r (mm1, mm0); /* mm0 = T1*x1 */
418
419 movq_m2r (*t3_vector, mm5); /* mm5 = T3 */
420 pmulhw_r2r (mm4, mm2); /* mm2 = T1*x7 */
421
422 movq_m2r (*(col+offset+5*8), mm6); /* mm6 = x5 */
423 movq_r2r (mm5, mm7); /* mm7 = T3-1 */
424
425 movq_m2r (*(col+offset+3*8), mm3); /* mm3 = x3 */
426 psubsw_r2r (mm4, mm0); /* mm0 = v17 */
427
428 movq_m2r (*t2_vector, mm4); /* mm4 = T2 */
429 pmulhw_r2r (mm3, mm5); /* mm5 = (T3-1)*x3 */
430
431 paddsw_r2r (mm2, mm1); /* mm1 = u17 */
432 pmulhw_r2r (mm6, mm7); /* mm7 = (T3-1)*x5 */
433
434 /* slot */
435
436 movq_r2r (mm4, mm2); /* mm2 = T2 */
437 paddsw_r2r (mm3, mm5); /* mm5 = T3*x3 */
438
439 pmulhw_m2r (*(col+offset+2*8), mm4);/* mm4 = T2*x2 */
440 paddsw_r2r (mm6, mm7); /* mm7 = T3*x5 */
441
442 psubsw_r2r (mm6, mm5); /* mm5 = v35 */
443 paddsw_r2r (mm3, mm7); /* mm7 = u35 */
444
445 movq_m2r (*(col+offset+6*8), mm3); /* mm3 = x6 */
446 movq_r2r (mm0, mm6); /* mm6 = v17 */
447
448 pmulhw_r2r (mm3, mm2); /* mm2 = T2*x6 */
449 psubsw_r2r (mm5, mm0); /* mm0 = b3 */
450
451 psubsw_r2r (mm3, mm4); /* mm4 = v26 */
452 paddsw_r2r (mm6, mm5); /* mm5 = v12 */
453
454 movq_r2m (mm0, *(col+offset+3*8)); /* save b3 in scratch0 */
455 movq_r2r (mm1, mm6); /* mm6 = u17 */
456
457 paddsw_m2r (*(col+offset+2*8), mm2);/* mm2 = u26 */
458 paddsw_r2r (mm7, mm6); /* mm6 = b0 */
459
460 psubsw_r2r (mm7, mm1); /* mm1 = u12 */
461 movq_r2r (mm1, mm7); /* mm7 = u12 */
462
463 movq_m2r (*(col+offset+0*8), mm3); /* mm3 = x0 */
464 paddsw_r2r (mm5, mm1); /* mm1 = u12+v12 */
465
466 movq_m2r (*c4_vector, mm0); /* mm0 = C4/2 */
467 psubsw_r2r (mm5, mm7); /* mm7 = u12-v12 */
468
469 movq_r2m (mm6, *(col+offset+5*8)); /* save b0 in scratch1 */
470 pmulhw_r2r (mm0, mm1); /* mm1 = b1/2 */
471
472 movq_r2r (mm4, mm6); /* mm6 = v26 */
473 pmulhw_r2r (mm0, mm7); /* mm7 = b2/2 */
474
475 movq_m2r (*(col+offset+4*8), mm5); /* mm5 = x4 */
476 movq_r2r (mm3, mm0); /* mm0 = x0 */
477
478 psubsw_r2r (mm5, mm3); /* mm3 = v04 */
479 paddsw_r2r (mm5, mm0); /* mm0 = u04 */
480
481 paddsw_r2r (mm3, mm4); /* mm4 = a1 */
482 movq_r2r (mm0, mm5); /* mm5 = u04 */
483
484 psubsw_r2r (mm6, mm3); /* mm3 = a2 */
485 paddsw_r2r (mm2, mm5); /* mm5 = a0 */
486
487 paddsw_r2r (mm1, mm1); /* mm1 = b1 */
488 psubsw_r2r (mm2, mm0); /* mm0 = a3 */
489
490 paddsw_r2r (mm7, mm7); /* mm7 = b2 */
491 movq_r2r (mm3, mm2); /* mm2 = a2 */
492
493 movq_r2r (mm4, mm6); /* mm6 = a1 */
494 paddsw_r2r (mm7, mm3); /* mm3 = a2+b2 */
495
496 psraw_i2r (COL_SHIFT, mm3); /* mm3 = y2 */
497 paddsw_r2r (mm1, mm4); /* mm4 = a1+b1 */
498
499 psraw_i2r (COL_SHIFT, mm4); /* mm4 = y1 */
500 psubsw_r2r (mm1, mm6); /* mm6 = a1-b1 */
501
502 movq_m2r (*(col+offset+5*8), mm1); /* mm1 = b0 */
503 psubsw_r2r (mm7, mm2); /* mm2 = a2-b2 */
504
505 psraw_i2r (COL_SHIFT, mm6); /* mm6 = y6 */
506 movq_r2r (mm5, mm7); /* mm7 = a0 */
507
508 movq_r2m (mm4, *(col+offset+1*8)); /* save y1 */
509 psraw_i2r (COL_SHIFT, mm2); /* mm2 = y5 */
510
511 movq_r2m (mm3, *(col+offset+2*8)); /* save y2 */
512 paddsw_r2r (mm1, mm5); /* mm5 = a0+b0 */
513
514 movq_m2r (*(col+offset+3*8), mm4); /* mm4 = b3 */
515 psubsw_r2r (mm1, mm7); /* mm7 = a0-b0 */
516
517 psraw_i2r (COL_SHIFT, mm5); /* mm5 = y0 */
518 movq_r2r (mm0, mm3); /* mm3 = a3 */
519
520 movq_r2m (mm2, *(col+offset+5*8)); /* save y5 */
521 psubsw_r2r (mm4, mm3); /* mm3 = a3-b3 */
522
523 psraw_i2r (COL_SHIFT, mm7); /* mm7 = y7 */
524 paddsw_r2r (mm0, mm4); /* mm4 = a3+b3 */
525
526 movq_r2m (mm5, *(col+offset+0*8)); /* save y0 */
527 psraw_i2r (COL_SHIFT, mm3); /* mm3 = y4 */
528
529 movq_r2m (mm6, *(col+offset+6*8)); /* save y6 */
530 psraw_i2r (COL_SHIFT, mm4); /* mm4 = y3 */
531
532 movq_r2m (mm7, *(col+offset+7*8)); /* save y7 */
533
534 movq_r2m (mm3, *(col+offset+4*8)); /* save y4 */
535
536 movq_r2m (mm4, *(col+offset+3*8)); /* save y3 */
537
538 #undef T1
539 #undef T2
540 #undef T3
541 #undef C4
542 }
543
544
545 static const int32_t rounder0[] ATTR_ALIGN(8) =
546 rounder ((1 << (COL_SHIFT - 1)) - 0.5);
547 static const int32_t rounder4[] ATTR_ALIGN(8) = rounder (0);
548 static const int32_t rounder1[] ATTR_ALIGN(8) =
549 rounder (1.25683487303); /* C1*(C1/C4+C1+C7)/2 */
550 static const int32_t rounder7[] ATTR_ALIGN(8) =
551 rounder (-0.25); /* C1*(C7/C4+C7-C1)/2 */
552 static const int32_t rounder2[] ATTR_ALIGN(8) =
553 rounder (0.60355339059); /* C2 * (C6+C2)/2 */
554 static const int32_t rounder6[] ATTR_ALIGN(8) =
555 rounder (-0.25); /* C2 * (C6-C2)/2 */
556 static const int32_t rounder3[] ATTR_ALIGN(8) =
557 rounder (0.087788325588); /* C3*(-C3/C4+C3+C5)/2 */
558 static const int32_t rounder5[] ATTR_ALIGN(8) =
559 rounder (-0.441341716183); /* C3*(-C5/C4+C5-C3)/2 */
560
561 #undef COL_SHIFT
562 #undef ROW_SHIFT
563
564 #define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \
565 void idct (int16_t * const block) \
566 { \
567 static const int16_t table04[] ATTR_ALIGN(16) = \
568 table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \
569 static const int16_t table17[] ATTR_ALIGN(16) = \
570 table (31521, 29692, 26722, 22725, 17855, 12299, 6270); \
571 static const int16_t table26[] ATTR_ALIGN(16) = \
572 table (29692, 27969, 25172, 21407, 16819, 11585, 5906); \
573 static const int16_t table35[] ATTR_ALIGN(16) = \
574 table (26722, 25172, 22654, 19266, 15137, 10426, 5315); \
575 \
576 idct_row_head (block, 0*8, table04); \
577 idct_row (table04, rounder0); \
578 idct_row_mid (block, 0*8, 4*8, table04); \
579 idct_row (table04, rounder4); \
580 idct_row_mid (block, 4*8, 1*8, table17); \
581 idct_row (table17, rounder1); \
582 idct_row_mid (block, 1*8, 7*8, table17); \
583 idct_row (table17, rounder7); \
584 idct_row_mid (block, 7*8, 2*8, table26); \
585 idct_row (table26, rounder2); \
586 idct_row_mid (block, 2*8, 6*8, table26); \
587 idct_row (table26, rounder6); \
588 idct_row_mid (block, 6*8, 3*8, table35); \
589 idct_row (table35, rounder3); \
590 idct_row_mid (block, 3*8, 5*8, table35); \
591 idct_row (table35, rounder5); \
592 idct_row_tail (block, 5*8); \
593 \
594 idct_col (block, 0); \
595 idct_col (block, 4); \
596 }
597
598 declare_idct (ff_mmxext_idct, mmxext_table,
599 mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid)
600
601 declare_idct (ff_mmx_idct, mmx_table,
602 mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid)
603