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mpegvideo.c
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1 /*
2  * Optimized for ia32 CPUs by Nick Kurshev <nickols_k@mail.ru>
3  * h263, mpeg1, mpeg2 dequantizer & draw_edges by Michael Niedermayer <michaelni@gmx.at>
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 #include "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/x86/asm.h"
25 #include "libavcodec/avcodec.h"
26 #include "libavcodec/mpegvideo.h"
27 #include "dsputil_mmx.h"
28 
29 #if HAVE_INLINE_ASM
30 
31 static void dct_unquantize_h263_intra_mmx(MpegEncContext *s,
32  int16_t *block, int n, int qscale)
33 {
34  x86_reg level, qmul, qadd, nCoeffs;
35 
36  qmul = qscale << 1;
37 
38  av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
39 
40  if (!s->h263_aic) {
41  if (n < 4)
42  level = block[0] * s->y_dc_scale;
43  else
44  level = block[0] * s->c_dc_scale;
45  qadd = (qscale - 1) | 1;
46  }else{
47  qadd = 0;
48  level= block[0];
49  }
50  if(s->ac_pred)
51  nCoeffs=63;
52  else
53  nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
54 
55 __asm__ volatile(
56  "movd %1, %%mm6 \n\t" //qmul
57  "packssdw %%mm6, %%mm6 \n\t"
58  "packssdw %%mm6, %%mm6 \n\t"
59  "movd %2, %%mm5 \n\t" //qadd
60  "pxor %%mm7, %%mm7 \n\t"
61  "packssdw %%mm5, %%mm5 \n\t"
62  "packssdw %%mm5, %%mm5 \n\t"
63  "psubw %%mm5, %%mm7 \n\t"
64  "pxor %%mm4, %%mm4 \n\t"
65  ".p2align 4 \n\t"
66  "1: \n\t"
67  "movq (%0, %3), %%mm0 \n\t"
68  "movq 8(%0, %3), %%mm1 \n\t"
69 
70  "pmullw %%mm6, %%mm0 \n\t"
71  "pmullw %%mm6, %%mm1 \n\t"
72 
73  "movq (%0, %3), %%mm2 \n\t"
74  "movq 8(%0, %3), %%mm3 \n\t"
75 
76  "pcmpgtw %%mm4, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
77  "pcmpgtw %%mm4, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
78 
79  "pxor %%mm2, %%mm0 \n\t"
80  "pxor %%mm3, %%mm1 \n\t"
81 
82  "paddw %%mm7, %%mm0 \n\t"
83  "paddw %%mm7, %%mm1 \n\t"
84 
85  "pxor %%mm0, %%mm2 \n\t"
86  "pxor %%mm1, %%mm3 \n\t"
87 
88  "pcmpeqw %%mm7, %%mm0 \n\t" // block[i] == 0 ? -1 : 0
89  "pcmpeqw %%mm7, %%mm1 \n\t" // block[i] == 0 ? -1 : 0
90 
91  "pandn %%mm2, %%mm0 \n\t"
92  "pandn %%mm3, %%mm1 \n\t"
93 
94  "movq %%mm0, (%0, %3) \n\t"
95  "movq %%mm1, 8(%0, %3) \n\t"
96 
97  "add $16, %3 \n\t"
98  "jng 1b \n\t"
99  ::"r" (block+nCoeffs), "rm"(qmul), "rm" (qadd), "r" (2*(-nCoeffs))
100  : "memory"
101  );
102  block[0]= level;
103 }
104 
105 
106 static void dct_unquantize_h263_inter_mmx(MpegEncContext *s,
107  int16_t *block, int n, int qscale)
108 {
109  x86_reg qmul, qadd, nCoeffs;
110 
111  qmul = qscale << 1;
112  qadd = (qscale - 1) | 1;
113 
114  assert(s->block_last_index[n]>=0 || s->h263_aic);
115 
116  nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
117 
118 __asm__ volatile(
119  "movd %1, %%mm6 \n\t" //qmul
120  "packssdw %%mm6, %%mm6 \n\t"
121  "packssdw %%mm6, %%mm6 \n\t"
122  "movd %2, %%mm5 \n\t" //qadd
123  "pxor %%mm7, %%mm7 \n\t"
124  "packssdw %%mm5, %%mm5 \n\t"
125  "packssdw %%mm5, %%mm5 \n\t"
126  "psubw %%mm5, %%mm7 \n\t"
127  "pxor %%mm4, %%mm4 \n\t"
128  ".p2align 4 \n\t"
129  "1: \n\t"
130  "movq (%0, %3), %%mm0 \n\t"
131  "movq 8(%0, %3), %%mm1 \n\t"
132 
133  "pmullw %%mm6, %%mm0 \n\t"
134  "pmullw %%mm6, %%mm1 \n\t"
135 
136  "movq (%0, %3), %%mm2 \n\t"
137  "movq 8(%0, %3), %%mm3 \n\t"
138 
139  "pcmpgtw %%mm4, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
140  "pcmpgtw %%mm4, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
141 
142  "pxor %%mm2, %%mm0 \n\t"
143  "pxor %%mm3, %%mm1 \n\t"
144 
145  "paddw %%mm7, %%mm0 \n\t"
146  "paddw %%mm7, %%mm1 \n\t"
147 
148  "pxor %%mm0, %%mm2 \n\t"
149  "pxor %%mm1, %%mm3 \n\t"
150 
151  "pcmpeqw %%mm7, %%mm0 \n\t" // block[i] == 0 ? -1 : 0
152  "pcmpeqw %%mm7, %%mm1 \n\t" // block[i] == 0 ? -1 : 0
153 
154  "pandn %%mm2, %%mm0 \n\t"
155  "pandn %%mm3, %%mm1 \n\t"
156 
157  "movq %%mm0, (%0, %3) \n\t"
158  "movq %%mm1, 8(%0, %3) \n\t"
159 
160  "add $16, %3 \n\t"
161  "jng 1b \n\t"
162  ::"r" (block+nCoeffs), "rm"(qmul), "rm" (qadd), "r" (2*(-nCoeffs))
163  : "memory"
164  );
165 }
166 
167 
168 /*
169  We can suppose that result of two multiplications can't be greater than 0xFFFF
170  i.e. is 16-bit, so we use here only PMULLW instruction and can avoid
171  a complex multiplication.
172 =====================================================
173  Full formula for multiplication of 2 integer numbers
174  which are represent as high:low words:
175  input: value1 = high1:low1
176  value2 = high2:low2
177  output: value3 = value1*value2
178  value3=high3:low3 (on overflow: modulus 2^32 wrap-around)
179  this mean that for 0x123456 * 0x123456 correct result is 0x766cb0ce4
180  but this algorithm will compute only 0x66cb0ce4
181  this limited by 16-bit size of operands
182  ---------------------------------
183  tlow1 = high1*low2
184  tlow2 = high2*low1
185  tlow1 = tlow1 + tlow2
186  high3:low3 = low1*low2
187  high3 += tlow1
188 */
189 static void dct_unquantize_mpeg1_intra_mmx(MpegEncContext *s,
190  int16_t *block, int n, int qscale)
191 {
192  x86_reg nCoeffs;
193  const uint16_t *quant_matrix;
194  int block0;
195 
196  av_assert2(s->block_last_index[n]>=0);
197 
198  nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ]+1;
199 
200  if (n < 4)
201  block0 = block[0] * s->y_dc_scale;
202  else
203  block0 = block[0] * s->c_dc_scale;
204  /* XXX: only mpeg1 */
205  quant_matrix = s->intra_matrix;
206 __asm__ volatile(
207  "pcmpeqw %%mm7, %%mm7 \n\t"
208  "psrlw $15, %%mm7 \n\t"
209  "movd %2, %%mm6 \n\t"
210  "packssdw %%mm6, %%mm6 \n\t"
211  "packssdw %%mm6, %%mm6 \n\t"
212  "mov %3, %%"REG_a" \n\t"
213  ".p2align 4 \n\t"
214  "1: \n\t"
215  "movq (%0, %%"REG_a"), %%mm0 \n\t"
216  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
217  "movq (%1, %%"REG_a"), %%mm4 \n\t"
218  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
219  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
220  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
221  "pxor %%mm2, %%mm2 \n\t"
222  "pxor %%mm3, %%mm3 \n\t"
223  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
224  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
225  "pxor %%mm2, %%mm0 \n\t"
226  "pxor %%mm3, %%mm1 \n\t"
227  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
228  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
229  "pmullw %%mm4, %%mm0 \n\t" // abs(block[i])*q
230  "pmullw %%mm5, %%mm1 \n\t" // abs(block[i])*q
231  "pxor %%mm4, %%mm4 \n\t"
232  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
233  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
234  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
235  "psraw $3, %%mm0 \n\t"
236  "psraw $3, %%mm1 \n\t"
237  "psubw %%mm7, %%mm0 \n\t"
238  "psubw %%mm7, %%mm1 \n\t"
239  "por %%mm7, %%mm0 \n\t"
240  "por %%mm7, %%mm1 \n\t"
241  "pxor %%mm2, %%mm0 \n\t"
242  "pxor %%mm3, %%mm1 \n\t"
243  "psubw %%mm2, %%mm0 \n\t"
244  "psubw %%mm3, %%mm1 \n\t"
245  "pandn %%mm0, %%mm4 \n\t"
246  "pandn %%mm1, %%mm5 \n\t"
247  "movq %%mm4, (%0, %%"REG_a") \n\t"
248  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
249 
250  "add $16, %%"REG_a" \n\t"
251  "js 1b \n\t"
252  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)
253  : "%"REG_a, "memory"
254  );
255  block[0]= block0;
256 }
257 
258 static void dct_unquantize_mpeg1_inter_mmx(MpegEncContext *s,
259  int16_t *block, int n, int qscale)
260 {
261  x86_reg nCoeffs;
262  const uint16_t *quant_matrix;
263 
264  av_assert2(s->block_last_index[n]>=0);
265 
266  nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ]+1;
267 
268  quant_matrix = s->inter_matrix;
269 __asm__ volatile(
270  "pcmpeqw %%mm7, %%mm7 \n\t"
271  "psrlw $15, %%mm7 \n\t"
272  "movd %2, %%mm6 \n\t"
273  "packssdw %%mm6, %%mm6 \n\t"
274  "packssdw %%mm6, %%mm6 \n\t"
275  "mov %3, %%"REG_a" \n\t"
276  ".p2align 4 \n\t"
277  "1: \n\t"
278  "movq (%0, %%"REG_a"), %%mm0 \n\t"
279  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
280  "movq (%1, %%"REG_a"), %%mm4 \n\t"
281  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
282  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
283  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
284  "pxor %%mm2, %%mm2 \n\t"
285  "pxor %%mm3, %%mm3 \n\t"
286  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
287  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
288  "pxor %%mm2, %%mm0 \n\t"
289  "pxor %%mm3, %%mm1 \n\t"
290  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
291  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
292  "paddw %%mm0, %%mm0 \n\t" // abs(block[i])*2
293  "paddw %%mm1, %%mm1 \n\t" // abs(block[i])*2
294  "paddw %%mm7, %%mm0 \n\t" // abs(block[i])*2 + 1
295  "paddw %%mm7, %%mm1 \n\t" // abs(block[i])*2 + 1
296  "pmullw %%mm4, %%mm0 \n\t" // (abs(block[i])*2 + 1)*q
297  "pmullw %%mm5, %%mm1 \n\t" // (abs(block[i])*2 + 1)*q
298  "pxor %%mm4, %%mm4 \n\t"
299  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
300  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
301  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
302  "psraw $4, %%mm0 \n\t"
303  "psraw $4, %%mm1 \n\t"
304  "psubw %%mm7, %%mm0 \n\t"
305  "psubw %%mm7, %%mm1 \n\t"
306  "por %%mm7, %%mm0 \n\t"
307  "por %%mm7, %%mm1 \n\t"
308  "pxor %%mm2, %%mm0 \n\t"
309  "pxor %%mm3, %%mm1 \n\t"
310  "psubw %%mm2, %%mm0 \n\t"
311  "psubw %%mm3, %%mm1 \n\t"
312  "pandn %%mm0, %%mm4 \n\t"
313  "pandn %%mm1, %%mm5 \n\t"
314  "movq %%mm4, (%0, %%"REG_a") \n\t"
315  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
316 
317  "add $16, %%"REG_a" \n\t"
318  "js 1b \n\t"
319  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)
320  : "%"REG_a, "memory"
321  );
322 }
323 
324 static void dct_unquantize_mpeg2_intra_mmx(MpegEncContext *s,
325  int16_t *block, int n, int qscale)
326 {
327  x86_reg nCoeffs;
328  const uint16_t *quant_matrix;
329  int block0;
330 
331  av_assert2(s->block_last_index[n]>=0);
332 
333  if(s->alternate_scan) nCoeffs= 63; //FIXME
334  else nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
335 
336  if (n < 4)
337  block0 = block[0] * s->y_dc_scale;
338  else
339  block0 = block[0] * s->c_dc_scale;
340  quant_matrix = s->intra_matrix;
341 __asm__ volatile(
342  "pcmpeqw %%mm7, %%mm7 \n\t"
343  "psrlw $15, %%mm7 \n\t"
344  "movd %2, %%mm6 \n\t"
345  "packssdw %%mm6, %%mm6 \n\t"
346  "packssdw %%mm6, %%mm6 \n\t"
347  "mov %3, %%"REG_a" \n\t"
348  ".p2align 4 \n\t"
349  "1: \n\t"
350  "movq (%0, %%"REG_a"), %%mm0 \n\t"
351  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
352  "movq (%1, %%"REG_a"), %%mm4 \n\t"
353  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
354  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
355  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
356  "pxor %%mm2, %%mm2 \n\t"
357  "pxor %%mm3, %%mm3 \n\t"
358  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
359  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
360  "pxor %%mm2, %%mm0 \n\t"
361  "pxor %%mm3, %%mm1 \n\t"
362  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
363  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
364  "pmullw %%mm4, %%mm0 \n\t" // abs(block[i])*q
365  "pmullw %%mm5, %%mm1 \n\t" // abs(block[i])*q
366  "pxor %%mm4, %%mm4 \n\t"
367  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
368  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
369  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
370  "psraw $3, %%mm0 \n\t"
371  "psraw $3, %%mm1 \n\t"
372  "pxor %%mm2, %%mm0 \n\t"
373  "pxor %%mm3, %%mm1 \n\t"
374  "psubw %%mm2, %%mm0 \n\t"
375  "psubw %%mm3, %%mm1 \n\t"
376  "pandn %%mm0, %%mm4 \n\t"
377  "pandn %%mm1, %%mm5 \n\t"
378  "movq %%mm4, (%0, %%"REG_a") \n\t"
379  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
380 
381  "add $16, %%"REG_a" \n\t"
382  "jng 1b \n\t"
383  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)
384  : "%"REG_a, "memory"
385  );
386  block[0]= block0;
387  //Note, we do not do mismatch control for intra as errors cannot accumulate
388 }
389 
390 static void dct_unquantize_mpeg2_inter_mmx(MpegEncContext *s,
391  int16_t *block, int n, int qscale)
392 {
393  x86_reg nCoeffs;
394  const uint16_t *quant_matrix;
395 
396  av_assert2(s->block_last_index[n]>=0);
397 
398  if(s->alternate_scan) nCoeffs= 63; //FIXME
399  else nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
400 
401  quant_matrix = s->inter_matrix;
402 __asm__ volatile(
403  "pcmpeqw %%mm7, %%mm7 \n\t"
404  "psrlq $48, %%mm7 \n\t"
405  "movd %2, %%mm6 \n\t"
406  "packssdw %%mm6, %%mm6 \n\t"
407  "packssdw %%mm6, %%mm6 \n\t"
408  "mov %3, %%"REG_a" \n\t"
409  ".p2align 4 \n\t"
410  "1: \n\t"
411  "movq (%0, %%"REG_a"), %%mm0 \n\t"
412  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
413  "movq (%1, %%"REG_a"), %%mm4 \n\t"
414  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
415  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
416  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
417  "pxor %%mm2, %%mm2 \n\t"
418  "pxor %%mm3, %%mm3 \n\t"
419  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
420  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
421  "pxor %%mm2, %%mm0 \n\t"
422  "pxor %%mm3, %%mm1 \n\t"
423  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
424  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
425  "paddw %%mm0, %%mm0 \n\t" // abs(block[i])*2
426  "paddw %%mm1, %%mm1 \n\t" // abs(block[i])*2
427  "pmullw %%mm4, %%mm0 \n\t" // abs(block[i])*2*q
428  "pmullw %%mm5, %%mm1 \n\t" // abs(block[i])*2*q
429  "paddw %%mm4, %%mm0 \n\t" // (abs(block[i])*2 + 1)*q
430  "paddw %%mm5, %%mm1 \n\t" // (abs(block[i])*2 + 1)*q
431  "pxor %%mm4, %%mm4 \n\t"
432  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
433  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
434  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
435  "psrlw $4, %%mm0 \n\t"
436  "psrlw $4, %%mm1 \n\t"
437  "pxor %%mm2, %%mm0 \n\t"
438  "pxor %%mm3, %%mm1 \n\t"
439  "psubw %%mm2, %%mm0 \n\t"
440  "psubw %%mm3, %%mm1 \n\t"
441  "pandn %%mm0, %%mm4 \n\t"
442  "pandn %%mm1, %%mm5 \n\t"
443  "pxor %%mm4, %%mm7 \n\t"
444  "pxor %%mm5, %%mm7 \n\t"
445  "movq %%mm4, (%0, %%"REG_a") \n\t"
446  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
447 
448  "add $16, %%"REG_a" \n\t"
449  "jng 1b \n\t"
450  "movd 124(%0, %3), %%mm0 \n\t"
451  "movq %%mm7, %%mm6 \n\t"
452  "psrlq $32, %%mm7 \n\t"
453  "pxor %%mm6, %%mm7 \n\t"
454  "movq %%mm7, %%mm6 \n\t"
455  "psrlq $16, %%mm7 \n\t"
456  "pxor %%mm6, %%mm7 \n\t"
457  "pslld $31, %%mm7 \n\t"
458  "psrlq $15, %%mm7 \n\t"
459  "pxor %%mm7, %%mm0 \n\t"
460  "movd %%mm0, 124(%0, %3) \n\t"
461 
462  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "r" (-2*nCoeffs)
463  : "%"REG_a, "memory"
464  );
465 }
466 
467 static void denoise_dct_mmx(MpegEncContext *s, int16_t *block){
468  const int intra= s->mb_intra;
469  int *sum= s->dct_error_sum[intra];
470  uint16_t *offset= s->dct_offset[intra];
471 
472  s->dct_count[intra]++;
473 
474  __asm__ volatile(
475  "pxor %%mm7, %%mm7 \n\t"
476  "1: \n\t"
477  "pxor %%mm0, %%mm0 \n\t"
478  "pxor %%mm1, %%mm1 \n\t"
479  "movq (%0), %%mm2 \n\t"
480  "movq 8(%0), %%mm3 \n\t"
481  "pcmpgtw %%mm2, %%mm0 \n\t"
482  "pcmpgtw %%mm3, %%mm1 \n\t"
483  "pxor %%mm0, %%mm2 \n\t"
484  "pxor %%mm1, %%mm3 \n\t"
485  "psubw %%mm0, %%mm2 \n\t"
486  "psubw %%mm1, %%mm3 \n\t"
487  "movq %%mm2, %%mm4 \n\t"
488  "movq %%mm3, %%mm5 \n\t"
489  "psubusw (%2), %%mm2 \n\t"
490  "psubusw 8(%2), %%mm3 \n\t"
491  "pxor %%mm0, %%mm2 \n\t"
492  "pxor %%mm1, %%mm3 \n\t"
493  "psubw %%mm0, %%mm2 \n\t"
494  "psubw %%mm1, %%mm3 \n\t"
495  "movq %%mm2, (%0) \n\t"
496  "movq %%mm3, 8(%0) \n\t"
497  "movq %%mm4, %%mm2 \n\t"
498  "movq %%mm5, %%mm3 \n\t"
499  "punpcklwd %%mm7, %%mm4 \n\t"
500  "punpckhwd %%mm7, %%mm2 \n\t"
501  "punpcklwd %%mm7, %%mm5 \n\t"
502  "punpckhwd %%mm7, %%mm3 \n\t"
503  "paddd (%1), %%mm4 \n\t"
504  "paddd 8(%1), %%mm2 \n\t"
505  "paddd 16(%1), %%mm5 \n\t"
506  "paddd 24(%1), %%mm3 \n\t"
507  "movq %%mm4, (%1) \n\t"
508  "movq %%mm2, 8(%1) \n\t"
509  "movq %%mm5, 16(%1) \n\t"
510  "movq %%mm3, 24(%1) \n\t"
511  "add $16, %0 \n\t"
512  "add $32, %1 \n\t"
513  "add $16, %2 \n\t"
514  "cmp %3, %0 \n\t"
515  " jb 1b \n\t"
516  : "+r" (block), "+r" (sum), "+r" (offset)
517  : "r"(block+64)
518  );
519 }
520 
521 static void denoise_dct_sse2(MpegEncContext *s, int16_t *block){
522  const int intra= s->mb_intra;
523  int *sum= s->dct_error_sum[intra];
524  uint16_t *offset= s->dct_offset[intra];
525 
526  s->dct_count[intra]++;
527 
528  __asm__ volatile(
529  "pxor %%xmm7, %%xmm7 \n\t"
530  "1: \n\t"
531  "pxor %%xmm0, %%xmm0 \n\t"
532  "pxor %%xmm1, %%xmm1 \n\t"
533  "movdqa (%0), %%xmm2 \n\t"
534  "movdqa 16(%0), %%xmm3 \n\t"
535  "pcmpgtw %%xmm2, %%xmm0 \n\t"
536  "pcmpgtw %%xmm3, %%xmm1 \n\t"
537  "pxor %%xmm0, %%xmm2 \n\t"
538  "pxor %%xmm1, %%xmm3 \n\t"
539  "psubw %%xmm0, %%xmm2 \n\t"
540  "psubw %%xmm1, %%xmm3 \n\t"
541  "movdqa %%xmm2, %%xmm4 \n\t"
542  "movdqa %%xmm3, %%xmm5 \n\t"
543  "psubusw (%2), %%xmm2 \n\t"
544  "psubusw 16(%2), %%xmm3 \n\t"
545  "pxor %%xmm0, %%xmm2 \n\t"
546  "pxor %%xmm1, %%xmm3 \n\t"
547  "psubw %%xmm0, %%xmm2 \n\t"
548  "psubw %%xmm1, %%xmm3 \n\t"
549  "movdqa %%xmm2, (%0) \n\t"
550  "movdqa %%xmm3, 16(%0) \n\t"
551  "movdqa %%xmm4, %%xmm6 \n\t"
552  "movdqa %%xmm5, %%xmm0 \n\t"
553  "punpcklwd %%xmm7, %%xmm4 \n\t"
554  "punpckhwd %%xmm7, %%xmm6 \n\t"
555  "punpcklwd %%xmm7, %%xmm5 \n\t"
556  "punpckhwd %%xmm7, %%xmm0 \n\t"
557  "paddd (%1), %%xmm4 \n\t"
558  "paddd 16(%1), %%xmm6 \n\t"
559  "paddd 32(%1), %%xmm5 \n\t"
560  "paddd 48(%1), %%xmm0 \n\t"
561  "movdqa %%xmm4, (%1) \n\t"
562  "movdqa %%xmm6, 16(%1) \n\t"
563  "movdqa %%xmm5, 32(%1) \n\t"
564  "movdqa %%xmm0, 48(%1) \n\t"
565  "add $32, %0 \n\t"
566  "add $64, %1 \n\t"
567  "add $32, %2 \n\t"
568  "cmp %3, %0 \n\t"
569  " jb 1b \n\t"
570  : "+r" (block), "+r" (sum), "+r" (offset)
571  : "r"(block+64)
572  XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
573  "%xmm4", "%xmm5", "%xmm6", "%xmm7")
574  );
575 }
576 
577 #endif /* HAVE_INLINE_ASM */
578 
579 av_cold void ff_MPV_common_init_x86(MpegEncContext *s)
580 {
581 #if HAVE_INLINE_ASM
582  int mm_flags = av_get_cpu_flags();
583 
584  if (mm_flags & AV_CPU_FLAG_MMX) {
585  s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_mmx;
586  s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_mmx;
587  s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_mmx;
588  s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_mmx;
589  if(!(s->flags & CODEC_FLAG_BITEXACT))
590  s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_mmx;
591  s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_mmx;
592 
593  if (mm_flags & AV_CPU_FLAG_SSE2) {
594  s->denoise_dct= denoise_dct_sse2;
595  } else {
596  s->denoise_dct= denoise_dct_mmx;
597  }
598  }
599 #endif /* HAVE_INLINE_ASM */
600 }
Generated on Sat May 25 2013 04:01:08 for FFmpeg by   doxygen 1.8.2