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