Statistics
| Branch: | Revision:

ffmpeg / libavcodec / i386 / fdct_mmx.c @ bb54f6ab

History | View | Annotate | Download (15.6 KB)

1
/*
2
 * MMX optimized forward DCT
3
 * The gcc porting is Copyright (c) 2001 Fabrice Bellard.
4
 * cleanup/optimizations are Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5
 * SSE2 optimization is Copyright (c) 2004 Denes Balatoni.
6
 *
7
 * from  fdctam32.c - AP922 MMX(3D-Now) forward-DCT
8
 *
9
 *  Intel Application Note AP-922 - fast, precise implementation of DCT
10
 *        http://developer.intel.com/vtune/cbts/appnotes.htm
11
 *
12
 * Also of inspiration:
13
 * a page about fdct at http://www.geocities.com/ssavekar/dct.htm
14
 * Skal's fdct at http://skal.planet-d.net/coding/dct.html
15
 *
16
 * This file is part of FFmpeg.
17
 *
18
 * FFmpeg is free software; you can redistribute it and/or
19
 * modify it under the terms of the GNU Lesser General Public
20
 * License as published by the Free Software Foundation; either
21
 * version 2.1 of the License, or (at your option) any later version.
22
 *
23
 * FFmpeg is distributed in the hope that it will be useful,
24
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
26
 * Lesser General Public License for more details.
27
 *
28
 * You should have received a copy of the GNU Lesser General Public
29
 * License along with FFmpeg; if not, write to the Free Software
30
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31
 */
32
#include "common.h"
33
#include "../dsputil.h"
34
#include "mmx.h"
35

    
36
#define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align)))
37

    
38
//////////////////////////////////////////////////////////////////////
39
//
40
// constants for the forward DCT
41
// -----------------------------
42
//
43
// Be sure to check that your compiler is aligning all constants to QWORD
44
// (8-byte) memory boundaries!  Otherwise the unaligned memory access will
45
// severely stall MMX execution.
46
//
47
//////////////////////////////////////////////////////////////////////
48

    
49
#define BITS_FRW_ACC   3 //; 2 or 3 for accuracy
50
#define SHIFT_FRW_COL  BITS_FRW_ACC
51
#define SHIFT_FRW_ROW  (BITS_FRW_ACC + 17 - 3)
52
#define RND_FRW_ROW    (1 << (SHIFT_FRW_ROW-1))
53
//#define RND_FRW_COL    (1 << (SHIFT_FRW_COL-1))
54

    
55
//concatenated table, for forward DCT transformation
56
static const int16_t fdct_tg_all_16[] ATTR_ALIGN(8) = {
57
    13036,  13036,  13036,  13036,        // tg * (2<<16) + 0.5
58
    27146,  27146,  27146,  27146,        // tg * (2<<16) + 0.5
59
   -21746, -21746, -21746, -21746,        // tg * (2<<16) + 0.5
60
};
61

    
62
static const int16_t ocos_4_16[4] ATTR_ALIGN(8) = {
63
    23170, 23170, 23170, 23170,           //cos * (2<<15) + 0.5
64
};
65

    
66
static const int64_t fdct_one_corr ATTR_ALIGN(8) = 0x0001000100010001LL;
67

    
68
static const int32_t fdct_r_row[2] ATTR_ALIGN(8) = {RND_FRW_ROW, RND_FRW_ROW };
69

    
70
static struct
71
{
72
 const int32_t fdct_r_row_sse2[4] ATTR_ALIGN(16);
73
} fdct_r_row_sse2 ATTR_ALIGN(16)=
74
{{
75
 RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW
76
}};
77
//static const long fdct_r_row_sse2[4] ATTR_ALIGN(16) = {RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW};
78

    
79
static const int16_t tab_frw_01234567[] ATTR_ALIGN(8) = {  // forward_dct coeff table
80
  16384,   16384,   22725,   19266,
81
  16384,   16384,   12873,    4520,
82
  21407,    8867,   19266,   -4520,
83
  -8867,  -21407,  -22725,  -12873,
84
  16384,  -16384,   12873,  -22725,
85
 -16384,   16384,    4520,   19266,
86
   8867,  -21407,    4520,  -12873,
87
  21407,   -8867,   19266,  -22725,
88

    
89
  22725,   22725,   31521,   26722,
90
  22725,   22725,   17855,    6270,
91
  29692,   12299,   26722,   -6270,
92
 -12299,  -29692,  -31521,  -17855,
93
  22725,  -22725,   17855,  -31521,
94
 -22725,   22725,    6270,   26722,
95
  12299,  -29692,    6270,  -17855,
96
  29692,  -12299,   26722,  -31521,
97

    
98
  21407,   21407,   29692,   25172,
99
  21407,   21407,   16819,    5906,
100
  27969,   11585,   25172,   -5906,
101
 -11585,  -27969,  -29692,  -16819,
102
  21407,  -21407,   16819,  -29692,
103
 -21407,   21407,    5906,   25172,
104
  11585,  -27969,    5906,  -16819,
105
  27969,  -11585,   25172,  -29692,
106

    
107
  19266,   19266,   26722,   22654,
108
  19266,   19266,   15137,    5315,
109
  25172,   10426,   22654,   -5315,
110
 -10426,  -25172,  -26722,  -15137,
111
  19266,  -19266,   15137,  -26722,
112
 -19266,   19266,    5315,   22654,
113
  10426,  -25172,    5315,  -15137,
114
  25172,  -10426,   22654,  -26722,
115

    
116
  16384,   16384,   22725,   19266,
117
  16384,   16384,   12873,    4520,
118
  21407,    8867,   19266,   -4520,
119
  -8867,  -21407,  -22725,  -12873,
120
  16384,  -16384,   12873,  -22725,
121
 -16384,   16384,    4520,   19266,
122
   8867,  -21407,    4520,  -12873,
123
  21407,   -8867,   19266,  -22725,
124

    
125
  19266,   19266,   26722,   22654,
126
  19266,   19266,   15137,    5315,
127
  25172,   10426,   22654,   -5315,
128
 -10426,  -25172,  -26722,  -15137,
129
  19266,  -19266,   15137,  -26722,
130
 -19266,   19266,    5315,   22654,
131
  10426,  -25172,    5315,  -15137,
132
  25172,  -10426,   22654,  -26722,
133

    
134
  21407,   21407,   29692,   25172,
135
  21407,   21407,   16819,    5906,
136
  27969,   11585,   25172,   -5906,
137
 -11585,  -27969,  -29692,  -16819,
138
  21407,  -21407,   16819,  -29692,
139
 -21407,   21407,    5906,   25172,
140
  11585,  -27969,    5906,  -16819,
141
  27969,  -11585,   25172,  -29692,
142

    
143
  22725,   22725,   31521,   26722,
144
  22725,   22725,   17855,    6270,
145
  29692,   12299,   26722,   -6270,
146
 -12299,  -29692,  -31521,  -17855,
147
  22725,  -22725,   17855,  -31521,
148
 -22725,   22725,    6270,   26722,
149
  12299,  -29692,    6270,  -17855,
150
  29692,  -12299,   26722,  -31521,
151
};
152

    
153
static struct
154
{
155
 const int16_t tab_frw_01234567_sse2[256] ATTR_ALIGN(16);
156
} tab_frw_01234567_sse2 ATTR_ALIGN(16) =
157
{{
158
//static const int16_t tab_frw_01234567_sse2[] ATTR_ALIGN(16) = {  // forward_dct coeff table
159
#define TABLE_SSE2 C4,  C4,  C1,  C3, -C6, -C2, -C1, -C5, \
160
                   C4,  C4,  C5,  C7,  C2,  C6,  C3, -C7, \
161
                  -C4,  C4,  C7,  C3,  C6, -C2,  C7, -C5, \
162
                   C4, -C4,  C5, -C1,  C2, -C6,  C3, -C1,
163
// c1..c7 * cos(pi/4) * 2^15
164
#define C1 22725
165
#define C2 21407
166
#define C3 19266
167
#define C4 16384
168
#define C5 12873
169
#define C6 8867
170
#define C7 4520
171
TABLE_SSE2
172

    
173
#undef C1
174
#undef C2
175
#undef C3
176
#undef C4
177
#undef C5
178
#undef C6
179
#undef C7
180
#define C1 31521
181
#define C2 29692
182
#define C3 26722
183
#define C4 22725
184
#define C5 17855
185
#define C6 12299
186
#define C7 6270
187
TABLE_SSE2
188

    
189
#undef C1
190
#undef C2
191
#undef C3
192
#undef C4
193
#undef C5
194
#undef C6
195
#undef C7
196
#define C1 29692
197
#define C2 27969
198
#define C3 25172
199
#define C4 21407
200
#define C5 16819
201
#define C6 11585
202
#define C7 5906
203
TABLE_SSE2
204

    
205
#undef C1
206
#undef C2
207
#undef C3
208
#undef C4
209
#undef C5
210
#undef C6
211
#undef C7
212
#define C1 26722
213
#define C2 25172
214
#define C3 22654
215
#define C4 19266
216
#define C5 15137
217
#define C6 10426
218
#define C7 5315
219
TABLE_SSE2
220

    
221
#undef C1
222
#undef C2
223
#undef C3
224
#undef C4
225
#undef C5
226
#undef C6
227
#undef C7
228
#define C1 22725
229
#define C2 21407
230
#define C3 19266
231
#define C4 16384
232
#define C5 12873
233
#define C6 8867
234
#define C7 4520
235
TABLE_SSE2
236

    
237
#undef C1
238
#undef C2
239
#undef C3
240
#undef C4
241
#undef C5
242
#undef C6
243
#undef C7
244
#define C1 26722
245
#define C2 25172
246
#define C3 22654
247
#define C4 19266
248
#define C5 15137
249
#define C6 10426
250
#define C7 5315
251
TABLE_SSE2
252

    
253
#undef C1
254
#undef C2
255
#undef C3
256
#undef C4
257
#undef C5
258
#undef C6
259
#undef C7
260
#define C1 29692
261
#define C2 27969
262
#define C3 25172
263
#define C4 21407
264
#define C5 16819
265
#define C6 11585
266
#define C7 5906
267
TABLE_SSE2
268

    
269
#undef C1
270
#undef C2
271
#undef C3
272
#undef C4
273
#undef C5
274
#undef C6
275
#undef C7
276
#define C1 31521
277
#define C2 29692
278
#define C3 26722
279
#define C4 22725
280
#define C5 17855
281
#define C6 12299
282
#define C7 6270
283
TABLE_SSE2
284
}};
285

    
286

    
287
static always_inline void fdct_col(const int16_t *in, int16_t *out, int offset)
288
{
289
    movq_m2r(*(in + offset + 1 * 8), mm0);
290
    movq_m2r(*(in + offset + 6 * 8), mm1);
291
    movq_r2r(mm0, mm2);
292
    movq_m2r(*(in + offset + 2 * 8), mm3);
293
    paddsw_r2r(mm1, mm0);
294
    movq_m2r(*(in + offset + 5 * 8), mm4);
295
    psllw_i2r(SHIFT_FRW_COL, mm0);
296
    movq_m2r(*(in + offset + 0 * 8), mm5);
297
    paddsw_r2r(mm3, mm4);
298
    paddsw_m2r(*(in + offset + 7 * 8), mm5);
299
    psllw_i2r(SHIFT_FRW_COL, mm4);
300
    movq_r2r(mm0, mm6);
301
    psubsw_r2r(mm1, mm2);
302
    movq_m2r(*(fdct_tg_all_16 + 4), mm1);
303
    psubsw_r2r(mm4, mm0);
304
    movq_m2r(*(in + offset + 3 * 8), mm7);
305
    pmulhw_r2r(mm0, mm1);
306
    paddsw_m2r(*(in + offset + 4 * 8), mm7);
307
    psllw_i2r(SHIFT_FRW_COL, mm5);
308
    paddsw_r2r(mm4, mm6);
309
    psllw_i2r(SHIFT_FRW_COL, mm7);
310
    movq_r2r(mm5, mm4);
311
    psubsw_r2r(mm7, mm5);
312
    paddsw_r2r(mm5, mm1);
313
    paddsw_r2r(mm7, mm4);
314
    por_m2r(fdct_one_corr, mm1);
315
    psllw_i2r(SHIFT_FRW_COL + 1, mm2);
316
    pmulhw_m2r(*(fdct_tg_all_16 + 4), mm5);
317
    movq_r2r(mm4, mm7);
318
    psubsw_m2r(*(in + offset + 5 * 8), mm3);
319
    psubsw_r2r(mm6, mm4);
320
    movq_r2m(mm1, *(out + offset + 2 * 8));
321
    paddsw_r2r(mm6, mm7);
322
    movq_m2r(*(in + offset + 3 * 8), mm1);
323
    psllw_i2r(SHIFT_FRW_COL + 1, mm3);
324
    psubsw_m2r(*(in + offset + 4 * 8), mm1);
325
    movq_r2r(mm2, mm6);
326
    movq_r2m(mm4, *(out + offset + 4 * 8));
327
    paddsw_r2r(mm3, mm2);
328
    pmulhw_m2r(*ocos_4_16, mm2);
329
    psubsw_r2r(mm3, mm6);
330
    pmulhw_m2r(*ocos_4_16, mm6);
331
    psubsw_r2r(mm0, mm5);
332
    por_m2r(fdct_one_corr, mm5);
333
    psllw_i2r(SHIFT_FRW_COL, mm1);
334
    por_m2r(fdct_one_corr, mm2);
335
    movq_r2r(mm1, mm4);
336
    movq_m2r(*(in + offset + 0 * 8), mm3);
337
    paddsw_r2r(mm6, mm1);
338
    psubsw_m2r(*(in + offset + 7 * 8), mm3);
339
    psubsw_r2r(mm6, mm4);
340
    movq_m2r(*(fdct_tg_all_16 + 0), mm0);
341
    psllw_i2r(SHIFT_FRW_COL, mm3);
342
    movq_m2r(*(fdct_tg_all_16 + 8), mm6);
343
    pmulhw_r2r(mm1, mm0);
344
    movq_r2m(mm7, *(out + offset + 0 * 8));
345
    pmulhw_r2r(mm4, mm6);
346
    movq_r2m(mm5, *(out + offset + 6 * 8));
347
    movq_r2r(mm3, mm7);
348
    movq_m2r(*(fdct_tg_all_16 + 8), mm5);
349
    psubsw_r2r(mm2, mm7);
350
    paddsw_r2r(mm2, mm3);
351
    pmulhw_r2r(mm7, mm5);
352
    paddsw_r2r(mm3, mm0);
353
    paddsw_r2r(mm4, mm6);
354
    pmulhw_m2r(*(fdct_tg_all_16 + 0), mm3);
355
    por_m2r(fdct_one_corr, mm0);
356
    paddsw_r2r(mm7, mm5);
357
    psubsw_r2r(mm6, mm7);
358
    movq_r2m(mm0, *(out + offset + 1 * 8));
359
    paddsw_r2r(mm4, mm5);
360
    movq_r2m(mm7, *(out + offset + 3 * 8));
361
    psubsw_r2r(mm1, mm3);
362
    movq_r2m(mm5, *(out + offset + 5 * 8));
363
    movq_r2m(mm3, *(out + offset + 7 * 8));
364
}
365

    
366

    
367
static always_inline void fdct_row_sse2(const int16_t *in, int16_t *out)
368
{
369
    asm volatile(
370
#define FDCT_ROW_SSE2_H1(i,t)                    \
371
        "movq      " #i "(%0), %%xmm2      \n\t" \
372
        "movq      " #i "+8(%0), %%xmm0    \n\t" \
373
        "movdqa    " #t "+32(%1), %%xmm3   \n\t" \
374
        "movdqa    " #t "+48(%1), %%xmm7   \n\t" \
375
        "movdqa    " #t "(%1), %%xmm4      \n\t" \
376
        "movdqa    " #t "+16(%1), %%xmm5   \n\t"
377

    
378
#define FDCT_ROW_SSE2_H2(i,t)                    \
379
        "movq      " #i "(%0), %%xmm2      \n\t" \
380
        "movq      " #i "+8(%0), %%xmm0    \n\t" \
381
        "movdqa    " #t "+32(%1), %%xmm3   \n\t" \
382
        "movdqa    " #t "+48(%1), %%xmm7   \n\t"
383

    
384
#define FDCT_ROW_SSE2(i)                      \
385
        "movq      %%xmm2, %%xmm1       \n\t" \
386
        "pshuflw   $27, %%xmm0, %%xmm0  \n\t" \
387
        "paddsw    %%xmm0, %%xmm1       \n\t" \
388
        "psubsw    %%xmm0, %%xmm2       \n\t" \
389
        "punpckldq %%xmm2, %%xmm1       \n\t" \
390
        "pshufd    $78, %%xmm1, %%xmm2  \n\t" \
391
        "pmaddwd   %%xmm2, %%xmm3       \n\t" \
392
        "pmaddwd   %%xmm1, %%xmm7       \n\t" \
393
        "pmaddwd   %%xmm5, %%xmm2       \n\t" \
394
        "pmaddwd   %%xmm4, %%xmm1       \n\t" \
395
        "paddd     %%xmm7, %%xmm3       \n\t" \
396
        "paddd     %%xmm2, %%xmm1       \n\t" \
397
        "paddd     %%xmm6, %%xmm3       \n\t" \
398
        "paddd     %%xmm6, %%xmm1       \n\t" \
399
        "psrad     %3, %%xmm3           \n\t" \
400
        "psrad     %3, %%xmm1           \n\t" \
401
        "packssdw  %%xmm3, %%xmm1       \n\t" \
402
        "movdqa    %%xmm1, " #i "(%4)   \n\t"
403

    
404
        "movdqa    (%2), %%xmm6         \n\t"
405
        FDCT_ROW_SSE2_H1(0,0)
406
        FDCT_ROW_SSE2(0)
407
        FDCT_ROW_SSE2_H2(64,0)
408
        FDCT_ROW_SSE2(64)
409

    
410
        FDCT_ROW_SSE2_H1(16,64)
411
        FDCT_ROW_SSE2(16)
412
        FDCT_ROW_SSE2_H2(112,64)
413
        FDCT_ROW_SSE2(112)
414

    
415
        FDCT_ROW_SSE2_H1(32,128)
416
        FDCT_ROW_SSE2(32)
417
        FDCT_ROW_SSE2_H2(96,128)
418
        FDCT_ROW_SSE2(96)
419

    
420
        FDCT_ROW_SSE2_H1(48,192)
421
        FDCT_ROW_SSE2(48)
422
        FDCT_ROW_SSE2_H2(80,192)
423
        FDCT_ROW_SSE2(80)
424
        :
425
        : "r" (in), "r" (tab_frw_01234567_sse2.tab_frw_01234567_sse2), "r" (fdct_r_row_sse2.fdct_r_row_sse2), "i" (SHIFT_FRW_ROW), "r" (out)
426
    );
427
}
428

    
429
static always_inline void fdct_row_mmx2(const int16_t *in, int16_t *out, const int16_t *table)
430
{
431
    pshufw_m2r(*(in + 4), mm5, 0x1B);
432
    movq_m2r(*(in + 0), mm0);
433
    movq_r2r(mm0, mm1);
434
    paddsw_r2r(mm5, mm0);
435
    psubsw_r2r(mm5, mm1);
436
    movq_r2r(mm0, mm2);
437
    punpckldq_r2r(mm1, mm0);
438
    punpckhdq_r2r(mm1, mm2);
439
    movq_m2r(*(table + 0), mm1);
440
    movq_m2r(*(table + 4), mm3);
441
    movq_m2r(*(table + 8), mm4);
442
    movq_m2r(*(table + 12), mm5);
443
    movq_m2r(*(table + 16), mm6);
444
    movq_m2r(*(table + 20), mm7);
445
    pmaddwd_r2r(mm0, mm1);
446
    pmaddwd_r2r(mm2, mm3);
447
    pmaddwd_r2r(mm0, mm4);
448
    pmaddwd_r2r(mm2, mm5);
449
    pmaddwd_r2r(mm0, mm6);
450
    pmaddwd_r2r(mm2, mm7);
451
    pmaddwd_m2r(*(table + 24), mm0);
452
    pmaddwd_m2r(*(table + 28), mm2);
453
    paddd_r2r(mm1, mm3);
454
    paddd_r2r(mm4, mm5);
455
    paddd_r2r(mm6, mm7);
456
    paddd_r2r(mm0, mm2);
457
    movq_m2r(*fdct_r_row, mm0);
458
    paddd_r2r(mm0, mm3);
459
    paddd_r2r(mm0, mm5);
460
    paddd_r2r(mm0, mm7);
461
    paddd_r2r(mm0, mm2);
462
    psrad_i2r(SHIFT_FRW_ROW, mm3);
463
    psrad_i2r(SHIFT_FRW_ROW, mm5);
464
    psrad_i2r(SHIFT_FRW_ROW, mm7);
465
    psrad_i2r(SHIFT_FRW_ROW, mm2);
466
    packssdw_r2r(mm5, mm3);
467
    packssdw_r2r(mm2, mm7);
468
    movq_r2m(mm3, *(out + 0));
469
    movq_r2m(mm7, *(out + 4));
470
}
471

    
472
static always_inline void fdct_row_mmx(const int16_t *in, int16_t *out, const int16_t *table)
473
{
474
//FIXME reorder (i dont have a old mmx only cpu here to benchmark ...)
475
    movd_m2r(*(in + 6), mm1);
476
    punpcklwd_m2r(*(in + 4), mm1);
477
    movq_r2r(mm1, mm2);
478
    psrlq_i2r(0x20, mm1);
479
    movq_m2r(*(in + 0), mm0);
480
    punpcklwd_r2r(mm2, mm1);
481
    movq_r2r(mm0, mm5);
482
    paddsw_r2r(mm1, mm0);
483
    psubsw_r2r(mm1, mm5);
484
    movq_r2r(mm0, mm2);
485
    punpckldq_r2r(mm5, mm0);
486
    punpckhdq_r2r(mm5, mm2);
487
    movq_m2r(*(table + 0), mm1);
488
    movq_m2r(*(table + 4), mm3);
489
    movq_m2r(*(table + 8), mm4);
490
    movq_m2r(*(table + 12), mm5);
491
    movq_m2r(*(table + 16), mm6);
492
    movq_m2r(*(table + 20), mm7);
493
    pmaddwd_r2r(mm0, mm1);
494
    pmaddwd_r2r(mm2, mm3);
495
    pmaddwd_r2r(mm0, mm4);
496
    pmaddwd_r2r(mm2, mm5);
497
    pmaddwd_r2r(mm0, mm6);
498
    pmaddwd_r2r(mm2, mm7);
499
    pmaddwd_m2r(*(table + 24), mm0);
500
    pmaddwd_m2r(*(table + 28), mm2);
501
    paddd_r2r(mm1, mm3);
502
    paddd_r2r(mm4, mm5);
503
    paddd_r2r(mm6, mm7);
504
    paddd_r2r(mm0, mm2);
505
    movq_m2r(*fdct_r_row, mm0);
506
    paddd_r2r(mm0, mm3);
507
    paddd_r2r(mm0, mm5);
508
    paddd_r2r(mm0, mm7);
509
    paddd_r2r(mm0, mm2);
510
    psrad_i2r(SHIFT_FRW_ROW, mm3);
511
    psrad_i2r(SHIFT_FRW_ROW, mm5);
512
    psrad_i2r(SHIFT_FRW_ROW, mm7);
513
    psrad_i2r(SHIFT_FRW_ROW, mm2);
514
    packssdw_r2r(mm5, mm3);
515
    packssdw_r2r(mm2, mm7);
516
    movq_r2m(mm3, *(out + 0));
517
    movq_r2m(mm7, *(out + 4));
518
}
519

    
520
void ff_fdct_mmx(int16_t *block)
521
{
522
    int64_t align_tmp[16] ATTR_ALIGN(8);
523
    int16_t * block1= (int16_t*)align_tmp;
524
    const int16_t *table= tab_frw_01234567;
525
    int i;
526

    
527
    fdct_col(block, block1, 0);
528
    fdct_col(block, block1, 4);
529

    
530
    for(i=8;i>0;i--) {
531
        fdct_row_mmx(block1, block, table);
532
        block1 += 8;
533
        table += 32;
534
        block += 8;
535
    }
536
}
537

    
538
void ff_fdct_mmx2(int16_t *block)
539
{
540
    int64_t align_tmp[16] ATTR_ALIGN(8);
541
    int16_t *block1= (int16_t*)align_tmp;
542
    const int16_t *table= tab_frw_01234567;
543
    int i;
544

    
545
    fdct_col(block, block1, 0);
546
    fdct_col(block, block1, 4);
547

    
548
    for(i=8;i>0;i--) {
549
        fdct_row_mmx2(block1, block, table);
550
        block1 += 8;
551
        table += 32;
552
        block += 8;
553
    }
554
}
555

    
556
void ff_fdct_sse2(int16_t *block)
557
{
558
    int64_t align_tmp[16] ATTR_ALIGN(16);
559
    int16_t * const block1= (int16_t*)align_tmp;
560

    
561
    fdct_col(block, block1, 0);
562
    fdct_col(block, block1, 4);
563

    
564
    fdct_row_sse2(block1, block);
565
}
566