aed934c04d86dbd4ddee12996fcc4e143173733f
[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 "mmx.h"
27
28 #define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align)))
29
30 #define ROW_SHIFT 11
31 #define COL_SHIFT 6
32
33 #define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))
34 #define rounder(bias) {round (bias), round (bias)}
35
36
37 #if 0
38 /* C row IDCT - it is just here to document the MMXEXT and MMX versions */
39 static inline void idct_row (int16_t * row, int offset,
40 int16_t * table, int32_t * rounder)
41 {
42 int C1, C2, C3, C4, C5, C6, C7;
43 int a0, a1, a2, a3, b0, b1, b2, b3;
44
45 row += offset;
46
47 C1 = table[1];
48 C2 = table[2];
49 C3 = table[3];
50 C4 = table[4];
51 C5 = table[5];
52 C6 = table[6];
53 C7 = table[7];
54
55 a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder;
56 a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder;
57 a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder;
58 a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder;
59
60 b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
61 b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
62 b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
63 b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
64
65 row[0] = (a0 + b0) >> ROW_SHIFT;
66 row[1] = (a1 + b1) >> ROW_SHIFT;
67 row[2] = (a2 + b2) >> ROW_SHIFT;
68 row[3] = (a3 + b3) >> ROW_SHIFT;
69 row[4] = (a3 - b3) >> ROW_SHIFT;
70 row[5] = (a2 - b2) >> ROW_SHIFT;
71 row[6] = (a1 - b1) >> ROW_SHIFT;
72 row[7] = (a0 - b0) >> ROW_SHIFT;
73 }
74 #endif
75
76
77 /* MMXEXT row IDCT */
78
79 #define mmxext_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, -c4, -c2, \
80 c4, c6, c4, c6, \
81 c1, c3, -c1, -c5, \
82 c5, c7, c3, -c7, \
83 c4, -c6, c4, -c6, \
84 -c4, c2, c4, -c2, \
85 c5, -c1, c3, -c1, \
86 c7, c3, c7, -c5 }
87
88 static inline void mmxext_row_head (int16_t * const row, const int offset,
89 const int16_t * const table)
90 {
91 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
92
93 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
94 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
95
96 movq_m2r (*table, mm3); /* mm3 = -C2 -C4 C2 C4 */
97 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
98
99 movq_m2r (*(table+4), mm4); /* mm4 = C6 C4 C6 C4 */
100 pmaddwd_r2r (mm0, mm3); /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */
101
102 pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */
103 }
104
105 static inline void mmxext_row (const int16_t * const table,
106 const int32_t * const rounder)
107 {
108 movq_m2r (*(table+8), mm1); /* mm1 = -C5 -C1 C3 C1 */
109 pmaddwd_r2r (mm2, mm4); /* mm4 = C4*x0+C6*x2 C4*x4+C6*x6 */
110
111 pmaddwd_m2r (*(table+16), mm0); /* mm0 = C4*x4-C6*x6 C4*x0-C6*x2 */
112 pshufw_r2r (mm6, mm6, 0x4e); /* mm6 = x3 x1 x7 x5 */
113
114 movq_m2r (*(table+12), mm7); /* mm7 = -C7 C3 C7 C5 */
115 pmaddwd_r2r (mm5, mm1); /* mm1 = -C1*x5-C5*x7 C1*x1+C3*x3 */
116
117 paddd_m2r (*rounder, mm3); /* mm3 += rounder */
118 pmaddwd_r2r (mm6, mm7); /* mm7 = C3*x1-C7*x3 C5*x5+C7*x7 */
119
120 pmaddwd_m2r (*(table+20), mm2); /* mm2 = C4*x0-C2*x2 -C4*x4+C2*x6 */
121 paddd_r2r (mm4, mm3); /* mm3 = a1 a0 + rounder */
122
123 pmaddwd_m2r (*(table+24), mm5); /* mm5 = C3*x5-C1*x7 C5*x1-C1*x3 */
124 movq_r2r (mm3, mm4); /* mm4 = a1 a0 + rounder */
125
126 pmaddwd_m2r (*(table+28), mm6); /* mm6 = C7*x1-C5*x3 C7*x5+C3*x7 */
127 paddd_r2r (mm7, mm1); /* mm1 = b1 b0 */
128
129 paddd_m2r (*rounder, mm0); /* mm0 += rounder */
130 psubd_r2r (mm1, mm3); /* mm3 = a1-b1 a0-b0 + rounder */
131
132 psrad_i2r (ROW_SHIFT, mm3); /* mm3 = y6 y7 */
133 paddd_r2r (mm4, mm1); /* mm1 = a1+b1 a0+b0 + rounder */
134
135 paddd_r2r (mm2, mm0); /* mm0 = a3 a2 + rounder */
136 psrad_i2r (ROW_SHIFT, mm1); /* mm1 = y1 y0 */
137
138 paddd_r2r (mm6, mm5); /* mm5 = b3 b2 */
139 movq_r2r (mm0, mm4); /* mm4 = a3 a2 + rounder */
140
141 paddd_r2r (mm5, mm0); /* mm0 = a3+b3 a2+b2 + rounder */
142 psubd_r2r (mm5, mm4); /* mm4 = a3-b3 a2-b2 + rounder */
143 }
144
145 static inline void mmxext_row_tail (int16_t * const row, const int store)
146 {
147 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
148
149 psrad_i2r (ROW_SHIFT, mm4); /* mm4 = y4 y5 */
150
151 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
152
153 packssdw_r2r (mm3, mm4); /* mm4 = y6 y7 y4 y5 */
154
155 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
156 pshufw_r2r (mm4, mm4, 0xb1); /* mm4 = y7 y6 y5 y4 */
157
158 /* slot */
159
160 movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */
161 }
162
163 static inline void mmxext_row_mid (int16_t * const row, const int store,
164 const int offset,
165 const int16_t * const table)
166 {
167 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
168 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
169
170 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
171 psrad_i2r (ROW_SHIFT, mm4); /* mm4 = y4 y5 */
172
173 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
174 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
175
176 packssdw_r2r (mm3, mm4); /* mm4 = y6 y7 y4 y5 */
177 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
178
179 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
180 pshufw_r2r (mm4, mm4, 0xb1); /* mm4 = y7 y6 y5 y4 */
181
182 movq_m2r (*table, mm3); /* mm3 = -C2 -C4 C2 C4 */
183 movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */
184
185 pmaddwd_r2r (mm0, mm3); /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */
186
187 movq_m2r (*(table+4), mm4); /* mm4 = C6 C4 C6 C4 */
188 pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */
189 }
190
191
192 /* MMX row IDCT */
193
194 #define mmx_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, c4, c6, \
195 c4, c6, -c4, -c2, \
196 c1, c3, c3, -c7, \
197 c5, c7, -c1, -c5, \
198 c4, -c6, c4, -c2, \
199 -c4, c2, c4, -c6, \
200 c5, -c1, c7, -c5, \
201 c7, c3, c3, -c1 }
202
203 static inline void mmx_row_head (int16_t * const row, const int offset,
204 const int16_t * const table)
205 {
206 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
207
208 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
209 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
210
211 movq_m2r (*table, mm3); /* mm3 = C6 C4 C2 C4 */
212 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
213
214 punpckldq_r2r (mm0, mm0); /* mm0 = x2 x0 x2 x0 */
215
216 movq_m2r (*(table+4), mm4); /* mm4 = -C2 -C4 C6 C4 */
217 pmaddwd_r2r (mm0, mm3); /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */
218
219 movq_m2r (*(table+8), mm1); /* mm1 = -C7 C3 C3 C1 */
220 punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */
221 }
222
223 static inline void mmx_row (const int16_t * const table,
224 const int32_t * const rounder)
225 {
226 pmaddwd_r2r (mm2, mm4); /* mm4 = -C4*x4-C2*x6 C4*x4+C6*x6 */
227 punpckldq_r2r (mm5, mm5); /* mm5 = x3 x1 x3 x1 */
228
229 pmaddwd_m2r (*(table+16), mm0); /* mm0 = C4*x0-C2*x2 C4*x0-C6*x2 */
230 punpckhdq_r2r (mm6, mm6); /* mm6 = x7 x5 x7 x5 */
231
232 movq_m2r (*(table+12), mm7); /* mm7 = -C5 -C1 C7 C5 */
233 pmaddwd_r2r (mm5, mm1); /* mm1 = C3*x1-C7*x3 C1*x1+C3*x3 */
234
235 paddd_m2r (*rounder, mm3); /* mm3 += rounder */
236 pmaddwd_r2r (mm6, mm7); /* mm7 = -C1*x5-C5*x7 C5*x5+C7*x7 */
237
238 pmaddwd_m2r (*(table+20), mm2); /* mm2 = C4*x4-C6*x6 -C4*x4+C2*x6 */
239 paddd_r2r (mm4, mm3); /* mm3 = a1 a0 + rounder */
240
241 pmaddwd_m2r (*(table+24), mm5); /* mm5 = C7*x1-C5*x3 C5*x1-C1*x3 */
242 movq_r2r (mm3, mm4); /* mm4 = a1 a0 + rounder */
243
244 pmaddwd_m2r (*(table+28), mm6); /* mm6 = C3*x5-C1*x7 C7*x5+C3*x7 */
245 paddd_r2r (mm7, mm1); /* mm1 = b1 b0 */
246
247 paddd_m2r (*rounder, mm0); /* mm0 += rounder */
248 psubd_r2r (mm1, mm3); /* mm3 = a1-b1 a0-b0 + rounder */
249
250 psrad_i2r (ROW_SHIFT, mm3); /* mm3 = y6 y7 */
251 paddd_r2r (mm4, mm1); /* mm1 = a1+b1 a0+b0 + rounder */
252
253 paddd_r2r (mm2, mm0); /* mm0 = a3 a2 + rounder */
254 psrad_i2r (ROW_SHIFT, mm1); /* mm1 = y1 y0 */
255
256 paddd_r2r (mm6, mm5); /* mm5 = b3 b2 */
257 movq_r2r (mm0, mm7); /* mm7 = a3 a2 + rounder */
258
259 paddd_r2r (mm5, mm0); /* mm0 = a3+b3 a2+b2 + rounder */
260 psubd_r2r (mm5, mm7); /* mm7 = a3-b3 a2-b2 + rounder */
261 }
262
263 static inline void mmx_row_tail (int16_t * const row, const int store)
264 {
265 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
266
267 psrad_i2r (ROW_SHIFT, mm7); /* mm7 = y4 y5 */
268
269 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
270
271 packssdw_r2r (mm3, mm7); /* mm7 = y6 y7 y4 y5 */
272
273 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
274 movq_r2r (mm7, mm4); /* mm4 = y6 y7 y4 y5 */
275
276 pslld_i2r (16, mm7); /* mm7 = y7 0 y5 0 */
277
278 psrld_i2r (16, mm4); /* mm4 = 0 y6 0 y4 */
279
280 por_r2r (mm4, mm7); /* mm7 = y7 y6 y5 y4 */
281
282 /* slot */
283
284 movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */
285 }
286
287 static inline void mmx_row_mid (int16_t * const row, const int store,
288 const int offset, const int16_t * const table)
289 {
290 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
291 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
292
293 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */
294 psrad_i2r (ROW_SHIFT, mm7); /* mm7 = y4 y5 */
295
296 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */
297 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */
298
299 packssdw_r2r (mm3, mm7); /* mm7 = y6 y7 y4 y5 */
300 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */
301
302 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */
303 movq_r2r (mm7, mm1); /* mm1 = y6 y7 y4 y5 */
304
305 punpckldq_r2r (mm0, mm0); /* mm0 = x2 x0 x2 x0 */
306 psrld_i2r (16, mm7); /* mm7 = 0 y6 0 y4 */
307
308 movq_m2r (*table, mm3); /* mm3 = C6 C4 C2 C4 */
309 pslld_i2r (16, mm1); /* mm1 = y7 0 y5 0 */
310
311 movq_m2r (*(table+4), mm4); /* mm4 = -C2 -C4 C6 C4 */
312 por_r2r (mm1, mm7); /* mm7 = y7 y6 y5 y4 */
313
314 movq_m2r (*(table+8), mm1); /* mm1 = -C7 C3 C3 C1 */
315 punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */
316
317 movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */
318 pmaddwd_r2r (mm0, mm3); /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */
319 }
320
321
322 #if 0
323 /* C column IDCT - it is just here to document the MMXEXT and MMX versions */
324 static inline void idct_col (int16_t * col, int offset)
325 {
326 /* multiplication - as implemented on mmx */
327 #define F(c,x) (((c) * (x)) >> 16)
328
329 /* saturation - it helps us handle torture test cases */
330 #define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x))
331
332 int16_t x0, x1, x2, x3, x4, x5, x6, x7;
333 int16_t y0, y1, y2, y3, y4, y5, y6, y7;
334 int16_t a0, a1, a2, a3, b0, b1, b2, b3;
335 int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12;
336
337 col += offset;
338
339 x0 = col[0*8];
340 x1 = col[1*8];
341 x2 = col[2*8];
342 x3 = col[3*8];
343 x4 = col[4*8];
344 x5 = col[5*8];
345 x6 = col[6*8];
346 x7 = col[7*8];
347
348 u04 = S (x0 + x4);
349 v04 = S (x0 - x4);
350 u26 = S (F (T2, x6) + x2);
351 v26 = S (F (T2, x2) - x6);
352
353 a0 = S (u04 + u26);
354 a1 = S (v04 + v26);
355 a2 = S (v04 - v26);
356 a3 = S (u04 - u26);
357
358 u17 = S (F (T1, x7) + x1);
359 v17 = S (F (T1, x1) - x7);
360 u35 = S (F (T3, x5) + x3);
361 v35 = S (F (T3, x3) - x5);
362
363 b0 = S (u17 + u35);
364 b3 = S (v17 - v35);
365 u12 = S (u17 - u35);
366 v12 = S (v17 + v35);
367 u12 = S (2 * F (C4, u12));
368 v12 = S (2 * F (C4, v12));
369 b1 = S (u12 + v12);
370 b2 = S (u12 - v12);
371
372 y0 = S (a0 + b0) >> COL_SHIFT;
373 y1 = S (a1 + b1) >> COL_SHIFT;
374 y2 = S (a2 + b2) >> COL_SHIFT;
375 y3 = S (a3 + b3) >> COL_SHIFT;
376
377 y4 = S (a3 - b3) >> COL_SHIFT;
378 y5 = S (a2 - b2) >> COL_SHIFT;
379 y6 = S (a1 - b1) >> COL_SHIFT;
380 y7 = S (a0 - b0) >> COL_SHIFT;
381
382 col[0*8] = y0;
383 col[1*8] = y1;
384 col[2*8] = y2;
385 col[3*8] = y3;
386 col[4*8] = y4;
387 col[5*8] = y5;
388 col[6*8] = y6;
389 col[7*8] = y7;
390 }
391 #endif
392
393
394 /* MMX column IDCT */
395 static inline void idct_col (int16_t * const col, const int offset)
396 {
397 #define T1 13036
398 #define T2 27146
399 #define T3 43790
400 #define C4 23170
401
402 static const short t1_vector[] ATTR_ALIGN(8) = {T1,T1,T1,T1};
403 static const short t2_vector[] ATTR_ALIGN(8) = {T2,T2,T2,T2};
404 static const short t3_vector[] ATTR_ALIGN(8) = {T3,T3,T3,T3};
405 static const short c4_vector[] ATTR_ALIGN(8) = {C4,C4,C4,C4};
406
407 /* column code adapted from Peter Gubanov */
408 /* http://www.elecard.com/peter/idct.shtml */
409
410 movq_m2r (*t1_vector, mm0); /* mm0 = T1 */
411
412 movq_m2r (*(col+offset+1*8), mm1); /* mm1 = x1 */
413 movq_r2r (mm0, mm2); /* mm2 = T1 */
414
415 movq_m2r (*(col+offset+7*8), mm4); /* mm4 = x7 */
416 pmulhw_r2r (mm1, mm0); /* mm0 = T1*x1 */
417
418 movq_m2r (*t3_vector, mm5); /* mm5 = T3 */
419 pmulhw_r2r (mm4, mm2); /* mm2 = T1*x7 */
420
421 movq_m2r (*(col+offset+5*8), mm6); /* mm6 = x5 */
422 movq_r2r (mm5, mm7); /* mm7 = T3-1 */
423
424 movq_m2r (*(col+offset+3*8), mm3); /* mm3 = x3 */
425 psubsw_r2r (mm4, mm0); /* mm0 = v17 */
426
427 movq_m2r (*t2_vector, mm4); /* mm4 = T2 */
428 pmulhw_r2r (mm3, mm5); /* mm5 = (T3-1)*x3 */
429
430 paddsw_r2r (mm2, mm1); /* mm1 = u17 */
431 pmulhw_r2r (mm6, mm7); /* mm7 = (T3-1)*x5 */
432
433 /* slot */
434
435 movq_r2r (mm4, mm2); /* mm2 = T2 */
436 paddsw_r2r (mm3, mm5); /* mm5 = T3*x3 */
437
438 pmulhw_m2r (*(col+offset+2*8), mm4);/* mm4 = T2*x2 */
439 paddsw_r2r (mm6, mm7); /* mm7 = T3*x5 */
440
441 psubsw_r2r (mm6, mm5); /* mm5 = v35 */
442 paddsw_r2r (mm3, mm7); /* mm7 = u35 */
443
444 movq_m2r (*(col+offset+6*8), mm3); /* mm3 = x6 */
445 movq_r2r (mm0, mm6); /* mm6 = v17 */
446
447 pmulhw_r2r (mm3, mm2); /* mm2 = T2*x6 */
448 psubsw_r2r (mm5, mm0); /* mm0 = b3 */
449
450 psubsw_r2r (mm3, mm4); /* mm4 = v26 */
451 paddsw_r2r (mm6, mm5); /* mm5 = v12 */
452
453 movq_r2m (mm0, *(col+offset+3*8)); /* save b3 in scratch0 */
454 movq_r2r (mm1, mm6); /* mm6 = u17 */
455
456 paddsw_m2r (*(col+offset+2*8), mm2);/* mm2 = u26 */
457 paddsw_r2r (mm7, mm6); /* mm6 = b0 */
458
459 psubsw_r2r (mm7, mm1); /* mm1 = u12 */
460 movq_r2r (mm1, mm7); /* mm7 = u12 */
461
462 movq_m2r (*(col+offset+0*8), mm3); /* mm3 = x0 */
463 paddsw_r2r (mm5, mm1); /* mm1 = u12+v12 */
464
465 movq_m2r (*c4_vector, mm0); /* mm0 = C4/2 */
466 psubsw_r2r (mm5, mm7); /* mm7 = u12-v12 */
467
468 movq_r2m (mm6, *(col+offset+5*8)); /* save b0 in scratch1 */
469 pmulhw_r2r (mm0, mm1); /* mm1 = b1/2 */
470
471 movq_r2r (mm4, mm6); /* mm6 = v26 */
472 pmulhw_r2r (mm0, mm7); /* mm7 = b2/2 */
473
474 movq_m2r (*(col+offset+4*8), mm5); /* mm5 = x4 */
475 movq_r2r (mm3, mm0); /* mm0 = x0 */
476
477 psubsw_r2r (mm5, mm3); /* mm3 = v04 */
478 paddsw_r2r (mm5, mm0); /* mm0 = u04 */
479
480 paddsw_r2r (mm3, mm4); /* mm4 = a1 */
481 movq_r2r (mm0, mm5); /* mm5 = u04 */
482
483 psubsw_r2r (mm6, mm3); /* mm3 = a2 */
484 paddsw_r2r (mm2, mm5); /* mm5 = a0 */
485
486 paddsw_r2r (mm1, mm1); /* mm1 = b1 */
487 psubsw_r2r (mm2, mm0); /* mm0 = a3 */
488
489 paddsw_r2r (mm7, mm7); /* mm7 = b2 */
490 movq_r2r (mm3, mm2); /* mm2 = a2 */
491
492 movq_r2r (mm4, mm6); /* mm6 = a1 */
493 paddsw_r2r (mm7, mm3); /* mm3 = a2+b2 */
494
495 psraw_i2r (COL_SHIFT, mm3); /* mm3 = y2 */
496 paddsw_r2r (mm1, mm4); /* mm4 = a1+b1 */
497
498 psraw_i2r (COL_SHIFT, mm4); /* mm4 = y1 */
499 psubsw_r2r (mm1, mm6); /* mm6 = a1-b1 */
500
501 movq_m2r (*(col+offset+5*8), mm1); /* mm1 = b0 */
502 psubsw_r2r (mm7, mm2); /* mm2 = a2-b2 */
503
504 psraw_i2r (COL_SHIFT, mm6); /* mm6 = y6 */
505 movq_r2r (mm5, mm7); /* mm7 = a0 */
506
507 movq_r2m (mm4, *(col+offset+1*8)); /* save y1 */
508 psraw_i2r (COL_SHIFT, mm2); /* mm2 = y5 */
509
510 movq_r2m (mm3, *(col+offset+2*8)); /* save y2 */
511 paddsw_r2r (mm1, mm5); /* mm5 = a0+b0 */
512
513 movq_m2r (*(col+offset+3*8), mm4); /* mm4 = b3 */
514 psubsw_r2r (mm1, mm7); /* mm7 = a0-b0 */
515
516 psraw_i2r (COL_SHIFT, mm5); /* mm5 = y0 */
517 movq_r2r (mm0, mm3); /* mm3 = a3 */
518
519 movq_r2m (mm2, *(col+offset+5*8)); /* save y5 */
520 psubsw_r2r (mm4, mm3); /* mm3 = a3-b3 */
521
522 psraw_i2r (COL_SHIFT, mm7); /* mm7 = y7 */
523 paddsw_r2r (mm0, mm4); /* mm4 = a3+b3 */
524
525 movq_r2m (mm5, *(col+offset+0*8)); /* save y0 */
526 psraw_i2r (COL_SHIFT, mm3); /* mm3 = y4 */
527
528 movq_r2m (mm6, *(col+offset+6*8)); /* save y6 */
529 psraw_i2r (COL_SHIFT, mm4); /* mm4 = y3 */
530
531 movq_r2m (mm7, *(col+offset+7*8)); /* save y7 */
532
533 movq_r2m (mm3, *(col+offset+4*8)); /* save y4 */
534
535 movq_r2m (mm4, *(col+offset+3*8)); /* save y3 */
536
537 #undef T1
538 #undef T2
539 #undef T3
540 #undef C4
541 }
542
543
544 static const int32_t rounder0[] ATTR_ALIGN(8) =
545 rounder ((1 << (COL_SHIFT - 1)) - 0.5);
546 static const int32_t rounder4[] ATTR_ALIGN(8) = rounder (0);
547 static const int32_t rounder1[] ATTR_ALIGN(8) =
548 rounder (1.25683487303); /* C1*(C1/C4+C1+C7)/2 */
549 static const int32_t rounder7[] ATTR_ALIGN(8) =
550 rounder (-0.25); /* C1*(C7/C4+C7-C1)/2 */
551 static const int32_t rounder2[] ATTR_ALIGN(8) =
552 rounder (0.60355339059); /* C2 * (C6+C2)/2 */
553 static const int32_t rounder6[] ATTR_ALIGN(8) =
554 rounder (-0.25); /* C2 * (C6-C2)/2 */
555 static const int32_t rounder3[] ATTR_ALIGN(8) =
556 rounder (0.087788325588); /* C3*(-C3/C4+C3+C5)/2 */
557 static const int32_t rounder5[] ATTR_ALIGN(8) =
558 rounder (-0.441341716183); /* C3*(-C5/C4+C5-C3)/2 */
559
560 #undef COL_SHIFT
561 #undef ROW_SHIFT
562
563 #define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \
564 void idct (int16_t * const block) \
565 { \
566 static const int16_t table04[] ATTR_ALIGN(16) = \
567 table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \
568 static const int16_t table17[] ATTR_ALIGN(16) = \
569 table (31521, 29692, 26722, 22725, 17855, 12299, 6270); \
570 static const int16_t table26[] ATTR_ALIGN(16) = \
571 table (29692, 27969, 25172, 21407, 16819, 11585, 5906); \
572 static const int16_t table35[] ATTR_ALIGN(16) = \
573 table (26722, 25172, 22654, 19266, 15137, 10426, 5315); \
574 \
575 idct_row_head (block, 0*8, table04); \
576 idct_row (table04, rounder0); \
577 idct_row_mid (block, 0*8, 4*8, table04); \
578 idct_row (table04, rounder4); \
579 idct_row_mid (block, 4*8, 1*8, table17); \
580 idct_row (table17, rounder1); \
581 idct_row_mid (block, 1*8, 7*8, table17); \
582 idct_row (table17, rounder7); \
583 idct_row_mid (block, 7*8, 2*8, table26); \
584 idct_row (table26, rounder2); \
585 idct_row_mid (block, 2*8, 6*8, table26); \
586 idct_row (table26, rounder6); \
587 idct_row_mid (block, 6*8, 3*8, table35); \
588 idct_row (table35, rounder3); \
589 idct_row_mid (block, 3*8, 5*8, table35); \
590 idct_row (table35, rounder5); \
591 idct_row_tail (block, 5*8); \
592 \
593 idct_col (block, 0); \
594 idct_col (block, 4); \
595 }
596
597 void ff_mmx_idct(DCTELEM *block);
598 void ff_mmxext_idct(DCTELEM *block);
599
600 declare_idct (ff_mmxext_idct, mmxext_table,
601 mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid)
602
603 declare_idct (ff_mmx_idct, mmx_table,
604 mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid)
605