Statistics
| Branch: | Revision:

ffmpeg / libavcodec / i386 / idct_mmx.c @ 098b4169

History | View | Annotate | Download (22.4 KB)

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