Statistics
| Branch: | Revision:

ffmpeg / libavcodec / ppc / fdct_altivec.c @ 0c893224

History | View | Annotate | Download (18.2 KB)

1
/* ffmpeg/libavcodec/ppc/fdct_altivec.c, this file is part of the
2
 * AltiVec optimized library for the FFMPEG Multimedia System
3
 * Copyright (C) 2003  James Klicman <james@klicman.org>
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg 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 GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22

    
23
#include "common.h"
24
#include "dsputil.h"
25
#include "dsputil_ppc.h"
26
#include "gcc_fixes.h"
27

    
28

    
29
#define vs16(v) ((vector signed short)(v))
30
#define vs32(v) ((vector signed int)(v))
31
#define vu8(v)  ((vector unsigned char)(v))
32
#define vu16(v) ((vector unsigned short)(v))
33
#define vu32(v) ((vector unsigned int)(v))
34

    
35

    
36
#define C1     0.98078525066375732421875000 /* cos(1*PI/16) */
37
#define C2     0.92387950420379638671875000 /* cos(2*PI/16) */
38
#define C3     0.83146959543228149414062500 /* cos(3*PI/16) */
39
#define C4     0.70710676908493041992187500 /* cos(4*PI/16) */
40
#define C5     0.55557024478912353515625000 /* cos(5*PI/16) */
41
#define C6     0.38268342614173889160156250 /* cos(6*PI/16) */
42
#define C7     0.19509032368659973144531250 /* cos(7*PI/16) */
43
#define SQRT_2 1.41421353816986083984375000 /* sqrt(2)      */
44

    
45

    
46
#define W0 -(2 * C2)
47
#define W1 (2 * C6)
48
#define W2 (SQRT_2 * C6)
49
#define W3 (SQRT_2 * C3)
50
#define W4 (SQRT_2 * (-C1 + C3 + C5 - C7))
51
#define W5 (SQRT_2 * ( C1 + C3 - C5 + C7))
52
#define W6 (SQRT_2 * ( C1 + C3 + C5 - C7))
53
#define W7 (SQRT_2 * ( C1 + C3 - C5 - C7))
54
#define W8 (SQRT_2 * ( C7 - C3))
55
#define W9 (SQRT_2 * (-C1 - C3))
56
#define WA (SQRT_2 * (-C3 - C5))
57
#define WB (SQRT_2 * ( C5 - C3))
58

    
59

    
60
static vector float fdctconsts[3] = {
61
    (vector float)AVV( W0, W1, W2, W3 ),
62
    (vector float)AVV( W4, W5, W6, W7 ),
63
    (vector float)AVV( W8, W9, WA, WB )
64
};
65

    
66
#define LD_W0 vec_splat(cnsts0, 0)
67
#define LD_W1 vec_splat(cnsts0, 1)
68
#define LD_W2 vec_splat(cnsts0, 2)
69
#define LD_W3 vec_splat(cnsts0, 3)
70
#define LD_W4 vec_splat(cnsts1, 0)
71
#define LD_W5 vec_splat(cnsts1, 1)
72
#define LD_W6 vec_splat(cnsts1, 2)
73
#define LD_W7 vec_splat(cnsts1, 3)
74
#define LD_W8 vec_splat(cnsts2, 0)
75
#define LD_W9 vec_splat(cnsts2, 1)
76
#define LD_WA vec_splat(cnsts2, 2)
77
#define LD_WB vec_splat(cnsts2, 3)
78

    
79

    
80
#define FDCTROW(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */                  \
81
    x0 = vec_add(b0, b7);               /* x0 = b0 + b7; */         \
82
    x7 = vec_sub(b0, b7);               /* x7 = b0 - b7; */         \
83
    x1 = vec_add(b1, b6);               /* x1 = b1 + b6; */         \
84
    x6 = vec_sub(b1, b6);               /* x6 = b1 - b6; */         \
85
    x2 = vec_add(b2, b5);               /* x2 = b2 + b5; */         \
86
    x5 = vec_sub(b2, b5);               /* x5 = b2 - b5; */         \
87
    x3 = vec_add(b3, b4);               /* x3 = b3 + b4; */         \
88
    x4 = vec_sub(b3, b4);               /* x4 = b3 - b4; */         \
89
                                                                    \
90
    b7 = vec_add(x0, x3);               /* b7 = x0 + x3; */         \
91
    b1 = vec_add(x1, x2);               /* b1 = x1 + x2; */         \
92
    b0 = vec_add(b7, b1);               /* b0 = b7 + b1; */         \
93
    b4 = vec_sub(b7, b1);               /* b4 = b7 - b1; */         \
94
                                                                    \
95
    b2 = vec_sub(x0, x3);               /* b2 = x0 - x3; */         \
96
    b6 = vec_sub(x1, x2);               /* b6 = x1 - x2; */         \
97
    b5 = vec_add(b6, b2);               /* b5 = b6 + b2; */         \
98
    cnst = LD_W2;                                                   \
99
    b5 = vec_madd(cnst, b5, mzero);     /* b5 = b5 * W2; */         \
100
    cnst = LD_W1;                                                   \
101
    b2 = vec_madd(cnst, b2, b5);        /* b2 = b5 + b2 * W1; */    \
102
    cnst = LD_W0;                                                   \
103
    b6 = vec_madd(cnst, b6, b5);        /* b6 = b5 + b6 * W0; */    \
104
                                                                    \
105
    x0 = vec_add(x4, x7);               /* x0 = x4 + x7; */         \
106
    x1 = vec_add(x5, x6);               /* x1 = x5 + x6; */         \
107
    x2 = vec_add(x4, x6);               /* x2 = x4 + x6; */         \
108
    x3 = vec_add(x5, x7);               /* x3 = x5 + x7; */         \
109
    x8 = vec_add(x2, x3);               /* x8 = x2 + x3; */         \
110
    cnst = LD_W3;                                                   \
111
    x8 = vec_madd(cnst, x8, mzero);     /* x8 = x8 * W3; */         \
112
                                                                    \
113
    cnst = LD_W8;                                                   \
114
    x0 = vec_madd(cnst, x0, mzero);     /* x0 *= W8; */             \
115
    cnst = LD_W9;                                                   \
116
    x1 = vec_madd(cnst, x1, mzero);     /* x1 *= W9; */             \
117
    cnst = LD_WA;                                                   \
118
    x2 = vec_madd(cnst, x2, x8);        /* x2 = x2 * WA + x8; */    \
119
    cnst = LD_WB;                                                   \
120
    x3 = vec_madd(cnst, x3, x8);        /* x3 = x3 * WB + x8; */    \
121
                                                                    \
122
    cnst = LD_W4;                                                   \
123
    b7 = vec_madd(cnst, x4, x0);        /* b7 = x4 * W4 + x0; */    \
124
    cnst = LD_W5;                                                   \
125
    b5 = vec_madd(cnst, x5, x1);        /* b5 = x5 * W5 + x1; */    \
126
    cnst = LD_W6;                                                   \
127
    b3 = vec_madd(cnst, x6, x1);        /* b3 = x6 * W6 + x1; */    \
128
    cnst = LD_W7;                                                   \
129
    b1 = vec_madd(cnst, x7, x0);        /* b1 = x7 * W7 + x0; */    \
130
                                                                    \
131
    b7 = vec_add(b7, x2);               /* b7 = b7 + x2; */         \
132
    b5 = vec_add(b5, x3);               /* b5 = b5 + x3; */         \
133
    b3 = vec_add(b3, x2);               /* b3 = b3 + x2; */         \
134
    b1 = vec_add(b1, x3);               /* b1 = b1 + x3; */         \
135
    /* }}} */
136

    
137
#define FDCTCOL(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */                  \
138
    x0 = vec_add(b0, b7);               /* x0 = b0 + b7; */         \
139
    x7 = vec_sub(b0, b7);               /* x7 = b0 - b7; */         \
140
    x1 = vec_add(b1, b6);               /* x1 = b1 + b6; */         \
141
    x6 = vec_sub(b1, b6);               /* x6 = b1 - b6; */         \
142
    x2 = vec_add(b2, b5);               /* x2 = b2 + b5; */         \
143
    x5 = vec_sub(b2, b5);               /* x5 = b2 - b5; */         \
144
    x3 = vec_add(b3, b4);               /* x3 = b3 + b4; */         \
145
    x4 = vec_sub(b3, b4);               /* x4 = b3 - b4; */         \
146
                                                                    \
147
    b7 = vec_add(x0, x3);               /* b7 = x0 + x3; */         \
148
    b1 = vec_add(x1, x2);               /* b1 = x1 + x2; */         \
149
    b0 = vec_add(b7, b1);               /* b0 = b7 + b1; */         \
150
    b4 = vec_sub(b7, b1);               /* b4 = b7 - b1; */         \
151
                                                                    \
152
    b2 = vec_sub(x0, x3);               /* b2 = x0 - x3; */         \
153
    b6 = vec_sub(x1, x2);               /* b6 = x1 - x2; */         \
154
    b5 = vec_add(b6, b2);               /* b5 = b6 + b2; */         \
155
    cnst = LD_W2;                                                   \
156
    b5 = vec_madd(cnst, b5, mzero);     /* b5 = b5 * W2; */         \
157
    cnst = LD_W1;                                                   \
158
    b2 = vec_madd(cnst, b2, b5);        /* b2 = b5 + b2 * W1; */    \
159
    cnst = LD_W0;                                                   \
160
    b6 = vec_madd(cnst, b6, b5);        /* b6 = b5 + b6 * W0; */    \
161
                                                                    \
162
    x0 = vec_add(x4, x7);               /* x0 = x4 + x7; */         \
163
    x1 = vec_add(x5, x6);               /* x1 = x5 + x6; */         \
164
    x2 = vec_add(x4, x6);               /* x2 = x4 + x6; */         \
165
    x3 = vec_add(x5, x7);               /* x3 = x5 + x7; */         \
166
    x8 = vec_add(x2, x3);               /* x8 = x2 + x3; */         \
167
    cnst = LD_W3;                                                   \
168
    x8 = vec_madd(cnst, x8, mzero);     /* x8 = x8 * W3; */         \
169
                                                                    \
170
    cnst = LD_W8;                                                   \
171
    x0 = vec_madd(cnst, x0, mzero);     /* x0 *= W8; */             \
172
    cnst = LD_W9;                                                   \
173
    x1 = vec_madd(cnst, x1, mzero);     /* x1 *= W9; */             \
174
    cnst = LD_WA;                                                   \
175
    x2 = vec_madd(cnst, x2, x8);        /* x2 = x2 * WA + x8; */    \
176
    cnst = LD_WB;                                                   \
177
    x3 = vec_madd(cnst, x3, x8);        /* x3 = x3 * WB + x8; */    \
178
                                                                    \
179
    cnst = LD_W4;                                                   \
180
    b7 = vec_madd(cnst, x4, x0);        /* b7 = x4 * W4 + x0; */    \
181
    cnst = LD_W5;                                                   \
182
    b5 = vec_madd(cnst, x5, x1);        /* b5 = x5 * W5 + x1; */    \
183
    cnst = LD_W6;                                                   \
184
    b3 = vec_madd(cnst, x6, x1);        /* b3 = x6 * W6 + x1; */    \
185
    cnst = LD_W7;                                                   \
186
    b1 = vec_madd(cnst, x7, x0);        /* b1 = x7 * W7 + x0; */    \
187
                                                                    \
188
    b7 = vec_add(b7, x2);               /* b7 += x2; */             \
189
    b5 = vec_add(b5, x3);               /* b5 += x3; */             \
190
    b3 = vec_add(b3, x2);               /* b3 += x2; */             \
191
    b1 = vec_add(b1, x3);               /* b1 += x3; */             \
192
    /* }}} */
193

    
194

    
195

    
196
/* two dimensional discrete cosine transform */
197

    
198
void fdct_altivec(int16_t *block)
199
{
200
POWERPC_PERF_DECLARE(altivec_fdct, 1);
201
    vector signed short *bp;
202
    vector float *cp;
203
    vector float b00, b10, b20, b30, b40, b50, b60, b70;
204
    vector float b01, b11, b21, b31, b41, b51, b61, b71;
205
    vector float mzero, cnst, cnsts0, cnsts1, cnsts2;
206
    vector float x0, x1, x2, x3, x4, x5, x6, x7, x8;
207

    
208
    POWERPC_PERF_START_COUNT(altivec_fdct, 1);
209

    
210

    
211
    /* setup constants {{{ */
212
    /* mzero = -0.0 */
213
    mzero = ((vector float)vec_splat_u32(-1));
214
    mzero = ((vector float)vec_sl(vu32(mzero), vu32(mzero)));
215
    cp = fdctconsts;
216
    cnsts0 = vec_ld(0, cp); cp++;
217
    cnsts1 = vec_ld(0, cp); cp++;
218
    cnsts2 = vec_ld(0, cp);
219
    /* }}} */
220

    
221

    
222
    /* 8x8 matrix transpose (vector short[8]) {{{ */
223
#define MERGE_S16(hl,a,b) vec_merge##hl(vs16(a), vs16(b))
224

    
225
    bp = (vector signed short*)block;
226
    b00 = ((vector float)vec_ld(0,    bp));
227
    b40 = ((vector float)vec_ld(16*4, bp));
228
    b01 = ((vector float)MERGE_S16(h, b00, b40));
229
    b11 = ((vector float)MERGE_S16(l, b00, b40));
230
    bp++;
231
    b10 = ((vector float)vec_ld(0,    bp));
232
    b50 = ((vector float)vec_ld(16*4, bp));
233
    b21 = ((vector float)MERGE_S16(h, b10, b50));
234
    b31 = ((vector float)MERGE_S16(l, b10, b50));
235
    bp++;
236
    b20 = ((vector float)vec_ld(0,    bp));
237
    b60 = ((vector float)vec_ld(16*4, bp));
238
    b41 = ((vector float)MERGE_S16(h, b20, b60));
239
    b51 = ((vector float)MERGE_S16(l, b20, b60));
240
    bp++;
241
    b30 = ((vector float)vec_ld(0,    bp));
242
    b70 = ((vector float)vec_ld(16*4, bp));
243
    b61 = ((vector float)MERGE_S16(h, b30, b70));
244
    b71 = ((vector float)MERGE_S16(l, b30, b70));
245

    
246
    x0 = ((vector float)MERGE_S16(h, b01, b41));
247
    x1 = ((vector float)MERGE_S16(l, b01, b41));
248
    x2 = ((vector float)MERGE_S16(h, b11, b51));
249
    x3 = ((vector float)MERGE_S16(l, b11, b51));
250
    x4 = ((vector float)MERGE_S16(h, b21, b61));
251
    x5 = ((vector float)MERGE_S16(l, b21, b61));
252
    x6 = ((vector float)MERGE_S16(h, b31, b71));
253
    x7 = ((vector float)MERGE_S16(l, b31, b71));
254

    
255
    b00 = ((vector float)MERGE_S16(h, x0, x4));
256
    b10 = ((vector float)MERGE_S16(l, x0, x4));
257
    b20 = ((vector float)MERGE_S16(h, x1, x5));
258
    b30 = ((vector float)MERGE_S16(l, x1, x5));
259
    b40 = ((vector float)MERGE_S16(h, x2, x6));
260
    b50 = ((vector float)MERGE_S16(l, x2, x6));
261
    b60 = ((vector float)MERGE_S16(h, x3, x7));
262
    b70 = ((vector float)MERGE_S16(l, x3, x7));
263

    
264
#undef MERGE_S16
265
    /* }}} */
266

    
267

    
268
/* Some of the initial calculations can be done as vector short before
269
 * conversion to vector float.  The following code section takes advantage
270
 * of this.
271
 */
272
#if 1
273
    /* fdct rows {{{ */
274
    x0 = ((vector float)vec_add(vs16(b00), vs16(b70)));
275
    x7 = ((vector float)vec_sub(vs16(b00), vs16(b70)));
276
    x1 = ((vector float)vec_add(vs16(b10), vs16(b60)));
277
    x6 = ((vector float)vec_sub(vs16(b10), vs16(b60)));
278
    x2 = ((vector float)vec_add(vs16(b20), vs16(b50)));
279
    x5 = ((vector float)vec_sub(vs16(b20), vs16(b50)));
280
    x3 = ((vector float)vec_add(vs16(b30), vs16(b40)));
281
    x4 = ((vector float)vec_sub(vs16(b30), vs16(b40)));
282

    
283
    b70 = ((vector float)vec_add(vs16(x0), vs16(x3)));
284
    b10 = ((vector float)vec_add(vs16(x1), vs16(x2)));
285

    
286
    b00 = ((vector float)vec_add(vs16(b70), vs16(b10)));
287
    b40 = ((vector float)vec_sub(vs16(b70), vs16(b10)));
288

    
289
#define CTF0(n) \
290
    b##n##1 = ((vector float)vec_unpackl(vs16(b##n##0))); \
291
    b##n##0 = ((vector float)vec_unpackh(vs16(b##n##0))); \
292
    b##n##1 = vec_ctf(vs32(b##n##1), 0); \
293
    b##n##0 = vec_ctf(vs32(b##n##0), 0);
294

    
295
    CTF0(0);
296
    CTF0(4);
297

    
298
    b20 = ((vector float)vec_sub(vs16(x0), vs16(x3)));
299
    b60 = ((vector float)vec_sub(vs16(x1), vs16(x2)));
300

    
301
    CTF0(2);
302
    CTF0(6);
303

    
304
#undef CTF0
305

    
306
    x0 = vec_add(b60, b20);
307
    x1 = vec_add(b61, b21);
308

    
309
    cnst = LD_W2;
310
    x0 = vec_madd(cnst, x0, mzero);
311
    x1 = vec_madd(cnst, x1, mzero);
312
    cnst = LD_W1;
313
    b20 = vec_madd(cnst, b20, x0);
314
    b21 = vec_madd(cnst, b21, x1);
315
    cnst = LD_W0;
316
    b60 = vec_madd(cnst, b60, x0);
317
    b61 = vec_madd(cnst, b61, x1);
318

    
319
#define CTFX(x,b) \
320
    b##0 = ((vector float)vec_unpackh(vs16(x))); \
321
    b##1 = ((vector float)vec_unpackl(vs16(x))); \
322
    b##0 = vec_ctf(vs32(b##0), 0); \
323
    b##1 = vec_ctf(vs32(b##1), 0); \
324

    
325
    CTFX(x4, b7);
326
    CTFX(x5, b5);
327
    CTFX(x6, b3);
328
    CTFX(x7, b1);
329

    
330
#undef CTFX
331

    
332

    
333
    x0 = vec_add(b70, b10);
334
    x1 = vec_add(b50, b30);
335
    x2 = vec_add(b70, b30);
336
    x3 = vec_add(b50, b10);
337
    x8 = vec_add(x2, x3);
338
    cnst = LD_W3;
339
    x8 = vec_madd(cnst, x8, mzero);
340

    
341
    cnst = LD_W8;
342
    x0 = vec_madd(cnst, x0, mzero);
343
    cnst = LD_W9;
344
    x1 = vec_madd(cnst, x1, mzero);
345
    cnst = LD_WA;
346
    x2 = vec_madd(cnst, x2, x8);
347
    cnst = LD_WB;
348
    x3 = vec_madd(cnst, x3, x8);
349

    
350
    cnst = LD_W4;
351
    b70 = vec_madd(cnst, b70, x0);
352
    cnst = LD_W5;
353
    b50 = vec_madd(cnst, b50, x1);
354
    cnst = LD_W6;
355
    b30 = vec_madd(cnst, b30, x1);
356
    cnst = LD_W7;
357
    b10 = vec_madd(cnst, b10, x0);
358

    
359
    b70 = vec_add(b70, x2);
360
    b50 = vec_add(b50, x3);
361
    b30 = vec_add(b30, x2);
362
    b10 = vec_add(b10, x3);
363

    
364

    
365
    x0 = vec_add(b71, b11);
366
    x1 = vec_add(b51, b31);
367
    x2 = vec_add(b71, b31);
368
    x3 = vec_add(b51, b11);
369
    x8 = vec_add(x2, x3);
370
    cnst = LD_W3;
371
    x8 = vec_madd(cnst, x8, mzero);
372

    
373
    cnst = LD_W8;
374
    x0 = vec_madd(cnst, x0, mzero);
375
    cnst = LD_W9;
376
    x1 = vec_madd(cnst, x1, mzero);
377
    cnst = LD_WA;
378
    x2 = vec_madd(cnst, x2, x8);
379
    cnst = LD_WB;
380
    x3 = vec_madd(cnst, x3, x8);
381

    
382
    cnst = LD_W4;
383
    b71 = vec_madd(cnst, b71, x0);
384
    cnst = LD_W5;
385
    b51 = vec_madd(cnst, b51, x1);
386
    cnst = LD_W6;
387
    b31 = vec_madd(cnst, b31, x1);
388
    cnst = LD_W7;
389
    b11 = vec_madd(cnst, b11, x0);
390

    
391
    b71 = vec_add(b71, x2);
392
    b51 = vec_add(b51, x3);
393
    b31 = vec_add(b31, x2);
394
    b11 = vec_add(b11, x3);
395
    /* }}} */
396
#else
397
    /* convert to float {{{ */
398
#define CTF(n) \
399
    vs32(b##n##1) = vec_unpackl(vs16(b##n##0)); \
400
    vs32(b##n##0) = vec_unpackh(vs16(b##n##0)); \
401
    b##n##1 = vec_ctf(vs32(b##n##1), 0); \
402
    b##n##0 = vec_ctf(vs32(b##n##0), 0); \
403

    
404
    CTF(0);
405
    CTF(1);
406
    CTF(2);
407
    CTF(3);
408
    CTF(4);
409
    CTF(5);
410
    CTF(6);
411
    CTF(7);
412

    
413
#undef CTF
414
    /* }}} */
415

    
416
    FDCTROW(b00, b10, b20, b30, b40, b50, b60, b70);
417
    FDCTROW(b01, b11, b21, b31, b41, b51, b61, b71);
418
#endif
419

    
420

    
421
    /* 8x8 matrix transpose (vector float[8][2]) {{{ */
422
    x0 = vec_mergel(b00, b20);
423
    x1 = vec_mergeh(b00, b20);
424
    x2 = vec_mergel(b10, b30);
425
    x3 = vec_mergeh(b10, b30);
426

    
427
    b00 = vec_mergeh(x1, x3);
428
    b10 = vec_mergel(x1, x3);
429
    b20 = vec_mergeh(x0, x2);
430
    b30 = vec_mergel(x0, x2);
431

    
432
    x4 = vec_mergel(b41, b61);
433
    x5 = vec_mergeh(b41, b61);
434
    x6 = vec_mergel(b51, b71);
435
    x7 = vec_mergeh(b51, b71);
436

    
437
    b41 = vec_mergeh(x5, x7);
438
    b51 = vec_mergel(x5, x7);
439
    b61 = vec_mergeh(x4, x6);
440
    b71 = vec_mergel(x4, x6);
441

    
442
    x0 = vec_mergel(b01, b21);
443
    x1 = vec_mergeh(b01, b21);
444
    x2 = vec_mergel(b11, b31);
445
    x3 = vec_mergeh(b11, b31);
446

    
447
    x4 = vec_mergel(b40, b60);
448
    x5 = vec_mergeh(b40, b60);
449
    x6 = vec_mergel(b50, b70);
450
    x7 = vec_mergeh(b50, b70);
451

    
452
    b40 = vec_mergeh(x1, x3);
453
    b50 = vec_mergel(x1, x3);
454
    b60 = vec_mergeh(x0, x2);
455
    b70 = vec_mergel(x0, x2);
456

    
457
    b01 = vec_mergeh(x5, x7);
458
    b11 = vec_mergel(x5, x7);
459
    b21 = vec_mergeh(x4, x6);
460
    b31 = vec_mergel(x4, x6);
461
    /* }}} */
462

    
463

    
464
    FDCTCOL(b00, b10, b20, b30, b40, b50, b60, b70);
465
    FDCTCOL(b01, b11, b21, b31, b41, b51, b61, b71);
466

    
467

    
468
    /* round, convert back to short {{{ */
469
#define CTS(n) \
470
    b##n##0 = vec_round(b##n##0); \
471
    b##n##1 = vec_round(b##n##1); \
472
    b##n##0 = ((vector float)vec_cts(b##n##0, 0)); \
473
    b##n##1 = ((vector float)vec_cts(b##n##1, 0)); \
474
    b##n##0 = ((vector float)vec_pack(vs32(b##n##0), vs32(b##n##1))); \
475
    vec_st(vs16(b##n##0), 0, bp);
476

    
477
    bp = (vector signed short*)block;
478
    CTS(0); bp++;
479
    CTS(1); bp++;
480
    CTS(2); bp++;
481
    CTS(3); bp++;
482
    CTS(4); bp++;
483
    CTS(5); bp++;
484
    CTS(6); bp++;
485
    CTS(7);
486

    
487
#undef CTS
488
    /* }}} */
489

    
490
POWERPC_PERF_STOP_COUNT(altivec_fdct, 1);
491
}
492

    
493
/* vim:set foldmethod=marker foldlevel=0: */