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snowdsp.c
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1 /*
2  * MMX and SSE2 optimized snow DSP utils
3  * Copyright (c) 2005-2006 Robert Edele <yartrebo@earthlink.net>
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/cpu.h"
23 #include "libavutil/x86/asm.h"
24 #include "libavcodec/avcodec.h"
25 #include "libavcodec/snow.h"
26 #include "libavcodec/snow_dwt.h"
27 #include "dsputil_x86.h"
28 
29 #if HAVE_INLINE_ASM
30 
31 static void ff_snow_horizontal_compose97i_sse2(IDWTELEM *b, IDWTELEM *temp, int width){
32  const int w2= (width+1)>>1;
33  const int w_l= (width>>1);
34  const int w_r= w2 - 1;
35  int i;
36 
37  { // Lift 0
38  IDWTELEM * const ref = b + w2 - 1;
39  IDWTELEM b_0 = b[0]; //By allowing the first entry in b[0] to be calculated twice
40  // (the first time erroneously), we allow the SSE2 code to run an extra pass.
41  // The savings in code and time are well worth having to store this value and
42  // calculate b[0] correctly afterwards.
43 
44  i = 0;
45  __asm__ volatile(
46  "pcmpeqd %%xmm7, %%xmm7 \n\t"
47  "pcmpeqd %%xmm3, %%xmm3 \n\t"
48  "psllw $1, %%xmm3 \n\t"
49  "paddw %%xmm7, %%xmm3 \n\t"
50  "psllw $13, %%xmm3 \n\t"
51  ::);
52  for(; i<w_l-15; i+=16){
53  __asm__ volatile(
54  "movdqu (%1), %%xmm1 \n\t"
55  "movdqu 16(%1), %%xmm5 \n\t"
56  "movdqu 2(%1), %%xmm2 \n\t"
57  "movdqu 18(%1), %%xmm6 \n\t"
58  "paddw %%xmm1, %%xmm2 \n\t"
59  "paddw %%xmm5, %%xmm6 \n\t"
60  "paddw %%xmm7, %%xmm2 \n\t"
61  "paddw %%xmm7, %%xmm6 \n\t"
62  "pmulhw %%xmm3, %%xmm2 \n\t"
63  "pmulhw %%xmm3, %%xmm6 \n\t"
64  "paddw (%0), %%xmm2 \n\t"
65  "paddw 16(%0), %%xmm6 \n\t"
66  "movdqa %%xmm2, (%0) \n\t"
67  "movdqa %%xmm6, 16(%0) \n\t"
68  :: "r"(&b[i]), "r"(&ref[i])
69  : "memory"
70  );
71  }
72  snow_horizontal_compose_lift_lead_out(i, b, b, ref, width, w_l, 0, W_DM, W_DO, W_DS);
73  b[0] = b_0 - ((W_DM * 2 * ref[1]+W_DO)>>W_DS);
74  }
75 
76  { // Lift 1
77  IDWTELEM * const dst = b+w2;
78 
79  i = 0;
80  for(; (((x86_reg)&dst[i]) & 0x1F) && i<w_r; i++){
81  dst[i] = dst[i] - (b[i] + b[i + 1]);
82  }
83  for(; i<w_r-15; i+=16){
84  __asm__ volatile(
85  "movdqu (%1), %%xmm1 \n\t"
86  "movdqu 16(%1), %%xmm5 \n\t"
87  "movdqu 2(%1), %%xmm2 \n\t"
88  "movdqu 18(%1), %%xmm6 \n\t"
89  "paddw %%xmm1, %%xmm2 \n\t"
90  "paddw %%xmm5, %%xmm6 \n\t"
91  "movdqa (%0), %%xmm0 \n\t"
92  "movdqa 16(%0), %%xmm4 \n\t"
93  "psubw %%xmm2, %%xmm0 \n\t"
94  "psubw %%xmm6, %%xmm4 \n\t"
95  "movdqa %%xmm0, (%0) \n\t"
96  "movdqa %%xmm4, 16(%0) \n\t"
97  :: "r"(&dst[i]), "r"(&b[i])
98  : "memory"
99  );
100  }
101  snow_horizontal_compose_lift_lead_out(i, dst, dst, b, width, w_r, 1, W_CM, W_CO, W_CS);
102  }
103 
104  { // Lift 2
105  IDWTELEM * const ref = b+w2 - 1;
106  IDWTELEM b_0 = b[0];
107 
108  i = 0;
109  __asm__ volatile(
110  "psllw $15, %%xmm7 \n\t"
111  "pcmpeqw %%xmm6, %%xmm6 \n\t"
112  "psrlw $13, %%xmm6 \n\t"
113  "paddw %%xmm7, %%xmm6 \n\t"
114  ::);
115  for(; i<w_l-15; i+=16){
116  __asm__ volatile(
117  "movdqu (%1), %%xmm0 \n\t"
118  "movdqu 16(%1), %%xmm4 \n\t"
119  "movdqu 2(%1), %%xmm1 \n\t"
120  "movdqu 18(%1), %%xmm5 \n\t" //FIXME try aligned reads and shifts
121  "paddw %%xmm6, %%xmm0 \n\t"
122  "paddw %%xmm6, %%xmm4 \n\t"
123  "paddw %%xmm7, %%xmm1 \n\t"
124  "paddw %%xmm7, %%xmm5 \n\t"
125  "pavgw %%xmm1, %%xmm0 \n\t"
126  "pavgw %%xmm5, %%xmm4 \n\t"
127  "psubw %%xmm7, %%xmm0 \n\t"
128  "psubw %%xmm7, %%xmm4 \n\t"
129  "psraw $1, %%xmm0 \n\t"
130  "psraw $1, %%xmm4 \n\t"
131  "movdqa (%0), %%xmm1 \n\t"
132  "movdqa 16(%0), %%xmm5 \n\t"
133  "paddw %%xmm1, %%xmm0 \n\t"
134  "paddw %%xmm5, %%xmm4 \n\t"
135  "psraw $2, %%xmm0 \n\t"
136  "psraw $2, %%xmm4 \n\t"
137  "paddw %%xmm1, %%xmm0 \n\t"
138  "paddw %%xmm5, %%xmm4 \n\t"
139  "movdqa %%xmm0, (%0) \n\t"
140  "movdqa %%xmm4, 16(%0) \n\t"
141  :: "r"(&b[i]), "r"(&ref[i])
142  : "memory"
143  );
144  }
145  snow_horizontal_compose_liftS_lead_out(i, b, b, ref, width, w_l);
146  b[0] = b_0 + ((2 * ref[1] + W_BO-1 + 4 * b_0) >> W_BS);
147  }
148 
149  { // Lift 3
150  IDWTELEM * const src = b+w2;
151 
152  i = 0;
153  for(; (((x86_reg)&temp[i]) & 0x1F) && i<w_r; i++){
154  temp[i] = src[i] - ((-W_AM*(b[i] + b[i+1]))>>W_AS);
155  }
156  for(; i<w_r-7; i+=8){
157  __asm__ volatile(
158  "movdqu 2(%1), %%xmm2 \n\t"
159  "movdqu 18(%1), %%xmm6 \n\t"
160  "paddw (%1), %%xmm2 \n\t"
161  "paddw 16(%1), %%xmm6 \n\t"
162  "movdqu (%0), %%xmm0 \n\t"
163  "movdqu 16(%0), %%xmm4 \n\t"
164  "paddw %%xmm2, %%xmm0 \n\t"
165  "paddw %%xmm6, %%xmm4 \n\t"
166  "psraw $1, %%xmm2 \n\t"
167  "psraw $1, %%xmm6 \n\t"
168  "paddw %%xmm0, %%xmm2 \n\t"
169  "paddw %%xmm4, %%xmm6 \n\t"
170  "movdqa %%xmm2, (%2) \n\t"
171  "movdqa %%xmm6, 16(%2) \n\t"
172  :: "r"(&src[i]), "r"(&b[i]), "r"(&temp[i])
173  : "memory"
174  );
175  }
176  snow_horizontal_compose_lift_lead_out(i, temp, src, b, width, w_r, 1, -W_AM, W_AO+1, W_AS);
177  }
178 
179  {
180  snow_interleave_line_header(&i, width, b, temp);
181 
182  for (; (i & 0x3E) != 0x3E; i-=2){
183  b[i+1] = temp[i>>1];
184  b[i] = b[i>>1];
185  }
186  for (i-=62; i>=0; i-=64){
187  __asm__ volatile(
188  "movdqa (%1), %%xmm0 \n\t"
189  "movdqa 16(%1), %%xmm2 \n\t"
190  "movdqa 32(%1), %%xmm4 \n\t"
191  "movdqa 48(%1), %%xmm6 \n\t"
192  "movdqa (%1), %%xmm1 \n\t"
193  "movdqa 16(%1), %%xmm3 \n\t"
194  "movdqa 32(%1), %%xmm5 \n\t"
195  "movdqa 48(%1), %%xmm7 \n\t"
196  "punpcklwd (%2), %%xmm0 \n\t"
197  "punpcklwd 16(%2), %%xmm2 \n\t"
198  "punpcklwd 32(%2), %%xmm4 \n\t"
199  "punpcklwd 48(%2), %%xmm6 \n\t"
200  "movdqa %%xmm0, (%0) \n\t"
201  "movdqa %%xmm2, 32(%0) \n\t"
202  "movdqa %%xmm4, 64(%0) \n\t"
203  "movdqa %%xmm6, 96(%0) \n\t"
204  "punpckhwd (%2), %%xmm1 \n\t"
205  "punpckhwd 16(%2), %%xmm3 \n\t"
206  "punpckhwd 32(%2), %%xmm5 \n\t"
207  "punpckhwd 48(%2), %%xmm7 \n\t"
208  "movdqa %%xmm1, 16(%0) \n\t"
209  "movdqa %%xmm3, 48(%0) \n\t"
210  "movdqa %%xmm5, 80(%0) \n\t"
211  "movdqa %%xmm7, 112(%0) \n\t"
212  :: "r"(&(b)[i]), "r"(&(b)[i>>1]), "r"(&(temp)[i>>1])
213  : "memory"
214  );
215  }
216  }
217 }
218 
219 static void ff_snow_horizontal_compose97i_mmx(IDWTELEM *b, IDWTELEM *temp, int width){
220  const int w2= (width+1)>>1;
221  const int w_l= (width>>1);
222  const int w_r= w2 - 1;
223  int i;
224 
225  { // Lift 0
226  IDWTELEM * const ref = b + w2 - 1;
227 
228  i = 1;
229  b[0] = b[0] - ((W_DM * 2 * ref[1]+W_DO)>>W_DS);
230  __asm__ volatile(
231  "pcmpeqw %%mm7, %%mm7 \n\t"
232  "pcmpeqw %%mm3, %%mm3 \n\t"
233  "psllw $1, %%mm3 \n\t"
234  "paddw %%mm7, %%mm3 \n\t"
235  "psllw $13, %%mm3 \n\t"
236  ::);
237  for(; i<w_l-7; i+=8){
238  __asm__ volatile(
239  "movq (%1), %%mm2 \n\t"
240  "movq 8(%1), %%mm6 \n\t"
241  "paddw 2(%1), %%mm2 \n\t"
242  "paddw 10(%1), %%mm6 \n\t"
243  "paddw %%mm7, %%mm2 \n\t"
244  "paddw %%mm7, %%mm6 \n\t"
245  "pmulhw %%mm3, %%mm2 \n\t"
246  "pmulhw %%mm3, %%mm6 \n\t"
247  "paddw (%0), %%mm2 \n\t"
248  "paddw 8(%0), %%mm6 \n\t"
249  "movq %%mm2, (%0) \n\t"
250  "movq %%mm6, 8(%0) \n\t"
251  :: "r"(&b[i]), "r"(&ref[i])
252  : "memory"
253  );
254  }
255  snow_horizontal_compose_lift_lead_out(i, b, b, ref, width, w_l, 0, W_DM, W_DO, W_DS);
256  }
257 
258  { // Lift 1
259  IDWTELEM * const dst = b+w2;
260 
261  i = 0;
262  for(; i<w_r-7; i+=8){
263  __asm__ volatile(
264  "movq (%1), %%mm2 \n\t"
265  "movq 8(%1), %%mm6 \n\t"
266  "paddw 2(%1), %%mm2 \n\t"
267  "paddw 10(%1), %%mm6 \n\t"
268  "movq (%0), %%mm0 \n\t"
269  "movq 8(%0), %%mm4 \n\t"
270  "psubw %%mm2, %%mm0 \n\t"
271  "psubw %%mm6, %%mm4 \n\t"
272  "movq %%mm0, (%0) \n\t"
273  "movq %%mm4, 8(%0) \n\t"
274  :: "r"(&dst[i]), "r"(&b[i])
275  : "memory"
276  );
277  }
278  snow_horizontal_compose_lift_lead_out(i, dst, dst, b, width, w_r, 1, W_CM, W_CO, W_CS);
279  }
280 
281  { // Lift 2
282  IDWTELEM * const ref = b+w2 - 1;
283 
284  i = 1;
285  b[0] = b[0] + (((2 * ref[1] + W_BO) + 4 * b[0]) >> W_BS);
286  __asm__ volatile(
287  "psllw $15, %%mm7 \n\t"
288  "pcmpeqw %%mm6, %%mm6 \n\t"
289  "psrlw $13, %%mm6 \n\t"
290  "paddw %%mm7, %%mm6 \n\t"
291  ::);
292  for(; i<w_l-7; i+=8){
293  __asm__ volatile(
294  "movq (%1), %%mm0 \n\t"
295  "movq 8(%1), %%mm4 \n\t"
296  "movq 2(%1), %%mm1 \n\t"
297  "movq 10(%1), %%mm5 \n\t"
298  "paddw %%mm6, %%mm0 \n\t"
299  "paddw %%mm6, %%mm4 \n\t"
300  "paddw %%mm7, %%mm1 \n\t"
301  "paddw %%mm7, %%mm5 \n\t"
302  "pavgw %%mm1, %%mm0 \n\t"
303  "pavgw %%mm5, %%mm4 \n\t"
304  "psubw %%mm7, %%mm0 \n\t"
305  "psubw %%mm7, %%mm4 \n\t"
306  "psraw $1, %%mm0 \n\t"
307  "psraw $1, %%mm4 \n\t"
308  "movq (%0), %%mm1 \n\t"
309  "movq 8(%0), %%mm5 \n\t"
310  "paddw %%mm1, %%mm0 \n\t"
311  "paddw %%mm5, %%mm4 \n\t"
312  "psraw $2, %%mm0 \n\t"
313  "psraw $2, %%mm4 \n\t"
314  "paddw %%mm1, %%mm0 \n\t"
315  "paddw %%mm5, %%mm4 \n\t"
316  "movq %%mm0, (%0) \n\t"
317  "movq %%mm4, 8(%0) \n\t"
318  :: "r"(&b[i]), "r"(&ref[i])
319  : "memory"
320  );
321  }
322  snow_horizontal_compose_liftS_lead_out(i, b, b, ref, width, w_l);
323  }
324 
325  { // Lift 3
326  IDWTELEM * const src = b+w2;
327  i = 0;
328 
329  for(; i<w_r-7; i+=8){
330  __asm__ volatile(
331  "movq 2(%1), %%mm2 \n\t"
332  "movq 10(%1), %%mm6 \n\t"
333  "paddw (%1), %%mm2 \n\t"
334  "paddw 8(%1), %%mm6 \n\t"
335  "movq (%0), %%mm0 \n\t"
336  "movq 8(%0), %%mm4 \n\t"
337  "paddw %%mm2, %%mm0 \n\t"
338  "paddw %%mm6, %%mm4 \n\t"
339  "psraw $1, %%mm2 \n\t"
340  "psraw $1, %%mm6 \n\t"
341  "paddw %%mm0, %%mm2 \n\t"
342  "paddw %%mm4, %%mm6 \n\t"
343  "movq %%mm2, (%2) \n\t"
344  "movq %%mm6, 8(%2) \n\t"
345  :: "r"(&src[i]), "r"(&b[i]), "r"(&temp[i])
346  : "memory"
347  );
348  }
349  snow_horizontal_compose_lift_lead_out(i, temp, src, b, width, w_r, 1, -W_AM, W_AO+1, W_AS);
350  }
351 
352  {
353  snow_interleave_line_header(&i, width, b, temp);
354 
355  for (; (i & 0x1E) != 0x1E; i-=2){
356  b[i+1] = temp[i>>1];
357  b[i] = b[i>>1];
358  }
359  for (i-=30; i>=0; i-=32){
360  __asm__ volatile(
361  "movq (%1), %%mm0 \n\t"
362  "movq 8(%1), %%mm2 \n\t"
363  "movq 16(%1), %%mm4 \n\t"
364  "movq 24(%1), %%mm6 \n\t"
365  "movq (%1), %%mm1 \n\t"
366  "movq 8(%1), %%mm3 \n\t"
367  "movq 16(%1), %%mm5 \n\t"
368  "movq 24(%1), %%mm7 \n\t"
369  "punpcklwd (%2), %%mm0 \n\t"
370  "punpcklwd 8(%2), %%mm2 \n\t"
371  "punpcklwd 16(%2), %%mm4 \n\t"
372  "punpcklwd 24(%2), %%mm6 \n\t"
373  "movq %%mm0, (%0) \n\t"
374  "movq %%mm2, 16(%0) \n\t"
375  "movq %%mm4, 32(%0) \n\t"
376  "movq %%mm6, 48(%0) \n\t"
377  "punpckhwd (%2), %%mm1 \n\t"
378  "punpckhwd 8(%2), %%mm3 \n\t"
379  "punpckhwd 16(%2), %%mm5 \n\t"
380  "punpckhwd 24(%2), %%mm7 \n\t"
381  "movq %%mm1, 8(%0) \n\t"
382  "movq %%mm3, 24(%0) \n\t"
383  "movq %%mm5, 40(%0) \n\t"
384  "movq %%mm7, 56(%0) \n\t"
385  :: "r"(&b[i]), "r"(&b[i>>1]), "r"(&temp[i>>1])
386  : "memory"
387  );
388  }
389  }
390 }
391 
392 #if HAVE_7REGS
393 #define snow_vertical_compose_sse2_load_add(op,r,t0,t1,t2,t3)\
394  ""op" ("r",%%"REG_d"), %%"t0" \n\t"\
395  ""op" 16("r",%%"REG_d"), %%"t1" \n\t"\
396  ""op" 32("r",%%"REG_d"), %%"t2" \n\t"\
397  ""op" 48("r",%%"REG_d"), %%"t3" \n\t"
398 
399 #define snow_vertical_compose_sse2_load(r,t0,t1,t2,t3)\
400  snow_vertical_compose_sse2_load_add("movdqa",r,t0,t1,t2,t3)
401 
402 #define snow_vertical_compose_sse2_add(r,t0,t1,t2,t3)\
403  snow_vertical_compose_sse2_load_add("paddw",r,t0,t1,t2,t3)
404 
405 #define snow_vertical_compose_r2r_sub(s0,s1,s2,s3,t0,t1,t2,t3)\
406  "psubw %%"s0", %%"t0" \n\t"\
407  "psubw %%"s1", %%"t1" \n\t"\
408  "psubw %%"s2", %%"t2" \n\t"\
409  "psubw %%"s3", %%"t3" \n\t"
410 
411 #define snow_vertical_compose_sse2_store(w,s0,s1,s2,s3)\
412  "movdqa %%"s0", ("w",%%"REG_d") \n\t"\
413  "movdqa %%"s1", 16("w",%%"REG_d") \n\t"\
414  "movdqa %%"s2", 32("w",%%"REG_d") \n\t"\
415  "movdqa %%"s3", 48("w",%%"REG_d") \n\t"
416 
417 #define snow_vertical_compose_sra(n,t0,t1,t2,t3)\
418  "psraw $"n", %%"t0" \n\t"\
419  "psraw $"n", %%"t1" \n\t"\
420  "psraw $"n", %%"t2" \n\t"\
421  "psraw $"n", %%"t3" \n\t"
422 
423 #define snow_vertical_compose_r2r_add(s0,s1,s2,s3,t0,t1,t2,t3)\
424  "paddw %%"s0", %%"t0" \n\t"\
425  "paddw %%"s1", %%"t1" \n\t"\
426  "paddw %%"s2", %%"t2" \n\t"\
427  "paddw %%"s3", %%"t3" \n\t"
428 
429 #define snow_vertical_compose_r2r_pmulhw(s0,s1,s2,s3,t0,t1,t2,t3)\
430  "pmulhw %%"s0", %%"t0" \n\t"\
431  "pmulhw %%"s1", %%"t1" \n\t"\
432  "pmulhw %%"s2", %%"t2" \n\t"\
433  "pmulhw %%"s3", %%"t3" \n\t"
434 
435 #define snow_vertical_compose_sse2_move(s0,s1,s2,s3,t0,t1,t2,t3)\
436  "movdqa %%"s0", %%"t0" \n\t"\
437  "movdqa %%"s1", %%"t1" \n\t"\
438  "movdqa %%"s2", %%"t2" \n\t"\
439  "movdqa %%"s3", %%"t3" \n\t"
440 
441 static void ff_snow_vertical_compose97i_sse2(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, int width){
442  x86_reg i = width;
443 
444  while(i & 0x1F)
445  {
446  i--;
447  b4[i] -= (W_DM*(b3[i] + b5[i])+W_DO)>>W_DS;
448  b3[i] -= (W_CM*(b2[i] + b4[i])+W_CO)>>W_CS;
449  b2[i] += (W_BM*(b1[i] + b3[i])+4*b2[i]+W_BO)>>W_BS;
450  b1[i] += (W_AM*(b0[i] + b2[i])+W_AO)>>W_AS;
451  }
452  i+=i;
453 
454  __asm__ volatile (
455  "jmp 2f \n\t"
456  "1: \n\t"
457  snow_vertical_compose_sse2_load("%4","xmm0","xmm2","xmm4","xmm6")
458  snow_vertical_compose_sse2_add("%6","xmm0","xmm2","xmm4","xmm6")
459 
460 
461  "pcmpeqw %%xmm0, %%xmm0 \n\t"
462  "pcmpeqw %%xmm2, %%xmm2 \n\t"
463  "paddw %%xmm2, %%xmm2 \n\t"
464  "paddw %%xmm0, %%xmm2 \n\t"
465  "psllw $13, %%xmm2 \n\t"
466  snow_vertical_compose_r2r_add("xmm0","xmm0","xmm0","xmm0","xmm1","xmm3","xmm5","xmm7")
467  snow_vertical_compose_r2r_pmulhw("xmm2","xmm2","xmm2","xmm2","xmm1","xmm3","xmm5","xmm7")
468  snow_vertical_compose_sse2_add("%5","xmm1","xmm3","xmm5","xmm7")
469  snow_vertical_compose_sse2_store("%5","xmm1","xmm3","xmm5","xmm7")
470  snow_vertical_compose_sse2_load("%4","xmm0","xmm2","xmm4","xmm6")
471  snow_vertical_compose_sse2_add("%3","xmm1","xmm3","xmm5","xmm7")
472  snow_vertical_compose_r2r_sub("xmm1","xmm3","xmm5","xmm7","xmm0","xmm2","xmm4","xmm6")
473  snow_vertical_compose_sse2_store("%4","xmm0","xmm2","xmm4","xmm6")
474 
475  "pcmpeqw %%xmm7, %%xmm7 \n\t"
476  "pcmpeqw %%xmm5, %%xmm5 \n\t"
477  "psllw $15, %%xmm7 \n\t"
478  "psrlw $13, %%xmm5 \n\t"
479  "paddw %%xmm7, %%xmm5 \n\t"
480  snow_vertical_compose_r2r_add("xmm5","xmm5","xmm5","xmm5","xmm0","xmm2","xmm4","xmm6")
481  "movq (%2,%%"REG_d"), %%xmm1 \n\t"
482  "movq 8(%2,%%"REG_d"), %%xmm3 \n\t"
483  "paddw %%xmm7, %%xmm1 \n\t"
484  "paddw %%xmm7, %%xmm3 \n\t"
485  "pavgw %%xmm1, %%xmm0 \n\t"
486  "pavgw %%xmm3, %%xmm2 \n\t"
487  "movq 16(%2,%%"REG_d"), %%xmm1 \n\t"
488  "movq 24(%2,%%"REG_d"), %%xmm3 \n\t"
489  "paddw %%xmm7, %%xmm1 \n\t"
490  "paddw %%xmm7, %%xmm3 \n\t"
491  "pavgw %%xmm1, %%xmm4 \n\t"
492  "pavgw %%xmm3, %%xmm6 \n\t"
493  snow_vertical_compose_r2r_sub("xmm7","xmm7","xmm7","xmm7","xmm0","xmm2","xmm4","xmm6")
494  snow_vertical_compose_sra("1","xmm0","xmm2","xmm4","xmm6")
495  snow_vertical_compose_sse2_add("%3","xmm0","xmm2","xmm4","xmm6")
496 
497  snow_vertical_compose_sra("2","xmm0","xmm2","xmm4","xmm6")
498  snow_vertical_compose_sse2_add("%3","xmm0","xmm2","xmm4","xmm6")
499  snow_vertical_compose_sse2_store("%3","xmm0","xmm2","xmm4","xmm6")
500  snow_vertical_compose_sse2_add("%1","xmm0","xmm2","xmm4","xmm6")
501  snow_vertical_compose_sse2_move("xmm0","xmm2","xmm4","xmm6","xmm1","xmm3","xmm5","xmm7")
502  snow_vertical_compose_sra("1","xmm0","xmm2","xmm4","xmm6")
503  snow_vertical_compose_r2r_add("xmm1","xmm3","xmm5","xmm7","xmm0","xmm2","xmm4","xmm6")
504  snow_vertical_compose_sse2_add("%2","xmm0","xmm2","xmm4","xmm6")
505  snow_vertical_compose_sse2_store("%2","xmm0","xmm2","xmm4","xmm6")
506 
507  "2: \n\t"
508  "sub $64, %%"REG_d" \n\t"
509  "jge 1b \n\t"
510  :"+d"(i)
511  :"r"(b0),"r"(b1),"r"(b2),"r"(b3),"r"(b4),"r"(b5));
512 }
513 
514 #define snow_vertical_compose_mmx_load_add(op,r,t0,t1,t2,t3)\
515  ""op" ("r",%%"REG_d"), %%"t0" \n\t"\
516  ""op" 8("r",%%"REG_d"), %%"t1" \n\t"\
517  ""op" 16("r",%%"REG_d"), %%"t2" \n\t"\
518  ""op" 24("r",%%"REG_d"), %%"t3" \n\t"
519 
520 #define snow_vertical_compose_mmx_load(r,t0,t1,t2,t3)\
521  snow_vertical_compose_mmx_load_add("movq",r,t0,t1,t2,t3)
522 
523 #define snow_vertical_compose_mmx_add(r,t0,t1,t2,t3)\
524  snow_vertical_compose_mmx_load_add("paddw",r,t0,t1,t2,t3)
525 
526 #define snow_vertical_compose_mmx_store(w,s0,s1,s2,s3)\
527  "movq %%"s0", ("w",%%"REG_d") \n\t"\
528  "movq %%"s1", 8("w",%%"REG_d") \n\t"\
529  "movq %%"s2", 16("w",%%"REG_d") \n\t"\
530  "movq %%"s3", 24("w",%%"REG_d") \n\t"
531 
532 #define snow_vertical_compose_mmx_move(s0,s1,s2,s3,t0,t1,t2,t3)\
533  "movq %%"s0", %%"t0" \n\t"\
534  "movq %%"s1", %%"t1" \n\t"\
535  "movq %%"s2", %%"t2" \n\t"\
536  "movq %%"s3", %%"t3" \n\t"
537 
538 
539 static void ff_snow_vertical_compose97i_mmx(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, int width){
540  x86_reg i = width;
541  while(i & 15)
542  {
543  i--;
544  b4[i] -= (W_DM*(b3[i] + b5[i])+W_DO)>>W_DS;
545  b3[i] -= (W_CM*(b2[i] + b4[i])+W_CO)>>W_CS;
546  b2[i] += (W_BM*(b1[i] + b3[i])+4*b2[i]+W_BO)>>W_BS;
547  b1[i] += (W_AM*(b0[i] + b2[i])+W_AO)>>W_AS;
548  }
549  i+=i;
550  __asm__ volatile(
551  "jmp 2f \n\t"
552  "1: \n\t"
553 
554  snow_vertical_compose_mmx_load("%4","mm1","mm3","mm5","mm7")
555  snow_vertical_compose_mmx_add("%6","mm1","mm3","mm5","mm7")
556  "pcmpeqw %%mm0, %%mm0 \n\t"
557  "pcmpeqw %%mm2, %%mm2 \n\t"
558  "paddw %%mm2, %%mm2 \n\t"
559  "paddw %%mm0, %%mm2 \n\t"
560  "psllw $13, %%mm2 \n\t"
561  snow_vertical_compose_r2r_add("mm0","mm0","mm0","mm0","mm1","mm3","mm5","mm7")
562  snow_vertical_compose_r2r_pmulhw("mm2","mm2","mm2","mm2","mm1","mm3","mm5","mm7")
563  snow_vertical_compose_mmx_add("%5","mm1","mm3","mm5","mm7")
564  snow_vertical_compose_mmx_store("%5","mm1","mm3","mm5","mm7")
565  snow_vertical_compose_mmx_load("%4","mm0","mm2","mm4","mm6")
566  snow_vertical_compose_mmx_add("%3","mm1","mm3","mm5","mm7")
567  snow_vertical_compose_r2r_sub("mm1","mm3","mm5","mm7","mm0","mm2","mm4","mm6")
568  snow_vertical_compose_mmx_store("%4","mm0","mm2","mm4","mm6")
569  "pcmpeqw %%mm7, %%mm7 \n\t"
570  "pcmpeqw %%mm5, %%mm5 \n\t"
571  "psllw $15, %%mm7 \n\t"
572  "psrlw $13, %%mm5 \n\t"
573  "paddw %%mm7, %%mm5 \n\t"
574  snow_vertical_compose_r2r_add("mm5","mm5","mm5","mm5","mm0","mm2","mm4","mm6")
575  "movq (%2,%%"REG_d"), %%mm1 \n\t"
576  "movq 8(%2,%%"REG_d"), %%mm3 \n\t"
577  "paddw %%mm7, %%mm1 \n\t"
578  "paddw %%mm7, %%mm3 \n\t"
579  "pavgw %%mm1, %%mm0 \n\t"
580  "pavgw %%mm3, %%mm2 \n\t"
581  "movq 16(%2,%%"REG_d"), %%mm1 \n\t"
582  "movq 24(%2,%%"REG_d"), %%mm3 \n\t"
583  "paddw %%mm7, %%mm1 \n\t"
584  "paddw %%mm7, %%mm3 \n\t"
585  "pavgw %%mm1, %%mm4 \n\t"
586  "pavgw %%mm3, %%mm6 \n\t"
587  snow_vertical_compose_r2r_sub("mm7","mm7","mm7","mm7","mm0","mm2","mm4","mm6")
588  snow_vertical_compose_sra("1","mm0","mm2","mm4","mm6")
589  snow_vertical_compose_mmx_add("%3","mm0","mm2","mm4","mm6")
590 
591  snow_vertical_compose_sra("2","mm0","mm2","mm4","mm6")
592  snow_vertical_compose_mmx_add("%3","mm0","mm2","mm4","mm6")
593  snow_vertical_compose_mmx_store("%3","mm0","mm2","mm4","mm6")
594  snow_vertical_compose_mmx_add("%1","mm0","mm2","mm4","mm6")
595  snow_vertical_compose_mmx_move("mm0","mm2","mm4","mm6","mm1","mm3","mm5","mm7")
596  snow_vertical_compose_sra("1","mm0","mm2","mm4","mm6")
597  snow_vertical_compose_r2r_add("mm1","mm3","mm5","mm7","mm0","mm2","mm4","mm6")
598  snow_vertical_compose_mmx_add("%2","mm0","mm2","mm4","mm6")
599  snow_vertical_compose_mmx_store("%2","mm0","mm2","mm4","mm6")
600 
601  "2: \n\t"
602  "sub $32, %%"REG_d" \n\t"
603  "jge 1b \n\t"
604  :"+d"(i)
605  :"r"(b0),"r"(b1),"r"(b2),"r"(b3),"r"(b4),"r"(b5));
606 }
607 #endif //HAVE_7REGS
608 
609 #if HAVE_6REGS
610 #define snow_inner_add_yblock_sse2_header \
611  IDWTELEM * * dst_array = sb->line + src_y;\
612  x86_reg tmp;\
613  __asm__ volatile(\
614  "mov %7, %%"REG_c" \n\t"\
615  "mov %6, %2 \n\t"\
616  "mov %4, %%"REG_S" \n\t"\
617  "pxor %%xmm7, %%xmm7 \n\t" /* 0 */\
618  "pcmpeqd %%xmm3, %%xmm3 \n\t"\
619  "psllw $15, %%xmm3 \n\t"\
620  "psrlw $12, %%xmm3 \n\t" /* FRAC_BITS >> 1 */\
621  "1: \n\t"\
622  "mov %1, %%"REG_D" \n\t"\
623  "mov (%%"REG_D"), %%"REG_D" \n\t"\
624  "add %3, %%"REG_D" \n\t"
625 
626 #define snow_inner_add_yblock_sse2_start_8(out_reg1, out_reg2, ptr_offset, s_offset)\
627  "mov "PTR_SIZE"*"ptr_offset"(%%"REG_a"), %%"REG_d"; \n\t"\
628  "movq (%%"REG_d"), %%"out_reg1" \n\t"\
629  "movq (%%"REG_d", %%"REG_c"), %%"out_reg2" \n\t"\
630  "punpcklbw %%xmm7, %%"out_reg1" \n\t"\
631  "punpcklbw %%xmm7, %%"out_reg2" \n\t"\
632  "movq "s_offset"(%%"REG_S"), %%xmm0 \n\t"\
633  "movq "s_offset"+16(%%"REG_S"), %%xmm4 \n\t"\
634  "punpcklbw %%xmm7, %%xmm0 \n\t"\
635  "punpcklbw %%xmm7, %%xmm4 \n\t"\
636  "pmullw %%xmm0, %%"out_reg1" \n\t"\
637  "pmullw %%xmm4, %%"out_reg2" \n\t"
638 
639 #define snow_inner_add_yblock_sse2_start_16(out_reg1, out_reg2, ptr_offset, s_offset)\
640  "mov "PTR_SIZE"*"ptr_offset"(%%"REG_a"), %%"REG_d"; \n\t"\
641  "movq (%%"REG_d"), %%"out_reg1" \n\t"\
642  "movq 8(%%"REG_d"), %%"out_reg2" \n\t"\
643  "punpcklbw %%xmm7, %%"out_reg1" \n\t"\
644  "punpcklbw %%xmm7, %%"out_reg2" \n\t"\
645  "movq "s_offset"(%%"REG_S"), %%xmm0 \n\t"\
646  "movq "s_offset"+8(%%"REG_S"), %%xmm4 \n\t"\
647  "punpcklbw %%xmm7, %%xmm0 \n\t"\
648  "punpcklbw %%xmm7, %%xmm4 \n\t"\
649  "pmullw %%xmm0, %%"out_reg1" \n\t"\
650  "pmullw %%xmm4, %%"out_reg2" \n\t"
651 
652 #define snow_inner_add_yblock_sse2_accum_8(ptr_offset, s_offset) \
653  snow_inner_add_yblock_sse2_start_8("xmm2", "xmm6", ptr_offset, s_offset)\
654  "paddusw %%xmm2, %%xmm1 \n\t"\
655  "paddusw %%xmm6, %%xmm5 \n\t"
656 
657 #define snow_inner_add_yblock_sse2_accum_16(ptr_offset, s_offset) \
658  snow_inner_add_yblock_sse2_start_16("xmm2", "xmm6", ptr_offset, s_offset)\
659  "paddusw %%xmm2, %%xmm1 \n\t"\
660  "paddusw %%xmm6, %%xmm5 \n\t"
661 
662 #define snow_inner_add_yblock_sse2_end_common1\
663  "add $32, %%"REG_S" \n\t"\
664  "add %%"REG_c", %0 \n\t"\
665  "add %%"REG_c", "PTR_SIZE"*3(%%"REG_a");\n\t"\
666  "add %%"REG_c", "PTR_SIZE"*2(%%"REG_a");\n\t"\
667  "add %%"REG_c", "PTR_SIZE"*1(%%"REG_a");\n\t"\
668  "add %%"REG_c", (%%"REG_a") \n\t"
669 
670 #define snow_inner_add_yblock_sse2_end_common2\
671  "jnz 1b \n\t"\
672  :"+m"(dst8),"+m"(dst_array),"=&r"(tmp)\
673  :\
674  "rm"((x86_reg)(src_x<<1)),"m"(obmc),"a"(block),"m"(b_h),"m"(src_stride):\
675  XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", )\
676  "%"REG_c"","%"REG_S"","%"REG_D"","%"REG_d"");
677 
678 #define snow_inner_add_yblock_sse2_end_8\
679  "sal $1, %%"REG_c" \n\t"\
680  "add"OPSIZE" $"PTR_SIZE"*2, %1 \n\t"\
681  snow_inner_add_yblock_sse2_end_common1\
682  "sar $1, %%"REG_c" \n\t"\
683  "sub $2, %2 \n\t"\
684  snow_inner_add_yblock_sse2_end_common2
685 
686 #define snow_inner_add_yblock_sse2_end_16\
687  "add"OPSIZE" $"PTR_SIZE"*1, %1 \n\t"\
688  snow_inner_add_yblock_sse2_end_common1\
689  "dec %2 \n\t"\
690  snow_inner_add_yblock_sse2_end_common2
691 
692 static void inner_add_yblock_bw_8_obmc_16_bh_even_sse2(const uint8_t *obmc, const x86_reg obmc_stride, uint8_t * * block, int b_w, x86_reg b_h,
693  int src_x, int src_y, x86_reg src_stride, slice_buffer * sb, int add, uint8_t * dst8){
694 snow_inner_add_yblock_sse2_header
695 snow_inner_add_yblock_sse2_start_8("xmm1", "xmm5", "3", "0")
696 snow_inner_add_yblock_sse2_accum_8("2", "8")
697 snow_inner_add_yblock_sse2_accum_8("1", "128")
698 snow_inner_add_yblock_sse2_accum_8("0", "136")
699 
700  "mov %0, %%"REG_d" \n\t"
701  "movdqa (%%"REG_D"), %%xmm0 \n\t"
702  "movdqa %%xmm1, %%xmm2 \n\t"
703 
704  "punpckhwd %%xmm7, %%xmm1 \n\t"
705  "punpcklwd %%xmm7, %%xmm2 \n\t"
706  "paddd %%xmm2, %%xmm0 \n\t"
707  "movdqa 16(%%"REG_D"), %%xmm2 \n\t"
708  "paddd %%xmm1, %%xmm2 \n\t"
709  "paddd %%xmm3, %%xmm0 \n\t"
710  "paddd %%xmm3, %%xmm2 \n\t"
711 
712  "mov %1, %%"REG_D" \n\t"
713  "mov "PTR_SIZE"(%%"REG_D"), %%"REG_D";\n\t"
714  "add %3, %%"REG_D" \n\t"
715 
716  "movdqa (%%"REG_D"), %%xmm4 \n\t"
717  "movdqa %%xmm5, %%xmm6 \n\t"
718  "punpckhwd %%xmm7, %%xmm5 \n\t"
719  "punpcklwd %%xmm7, %%xmm6 \n\t"
720  "paddd %%xmm6, %%xmm4 \n\t"
721  "movdqa 16(%%"REG_D"), %%xmm6 \n\t"
722  "paddd %%xmm5, %%xmm6 \n\t"
723  "paddd %%xmm3, %%xmm4 \n\t"
724  "paddd %%xmm3, %%xmm6 \n\t"
725 
726  "psrad $8, %%xmm0 \n\t" /* FRAC_BITS. */
727  "psrad $8, %%xmm2 \n\t" /* FRAC_BITS. */
728  "packssdw %%xmm2, %%xmm0 \n\t"
729  "packuswb %%xmm7, %%xmm0 \n\t"
730  "movq %%xmm0, (%%"REG_d") \n\t"
731 
732  "psrad $8, %%xmm4 \n\t" /* FRAC_BITS. */
733  "psrad $8, %%xmm6 \n\t" /* FRAC_BITS. */
734  "packssdw %%xmm6, %%xmm4 \n\t"
735  "packuswb %%xmm7, %%xmm4 \n\t"
736  "movq %%xmm4, (%%"REG_d",%%"REG_c");\n\t"
737 snow_inner_add_yblock_sse2_end_8
738 }
739 
740 static void inner_add_yblock_bw_16_obmc_32_sse2(const uint8_t *obmc, const x86_reg obmc_stride, uint8_t * * block, int b_w, x86_reg b_h,
741  int src_x, int src_y, x86_reg src_stride, slice_buffer * sb, int add, uint8_t * dst8){
742 snow_inner_add_yblock_sse2_header
743 snow_inner_add_yblock_sse2_start_16("xmm1", "xmm5", "3", "0")
744 snow_inner_add_yblock_sse2_accum_16("2", "16")
745 snow_inner_add_yblock_sse2_accum_16("1", "512")
746 snow_inner_add_yblock_sse2_accum_16("0", "528")
747 
748  "mov %0, %%"REG_d" \n\t"
749  "psrlw $4, %%xmm1 \n\t"
750  "psrlw $4, %%xmm5 \n\t"
751  "paddw (%%"REG_D"), %%xmm1 \n\t"
752  "paddw 16(%%"REG_D"), %%xmm5 \n\t"
753  "paddw %%xmm3, %%xmm1 \n\t"
754  "paddw %%xmm3, %%xmm5 \n\t"
755  "psraw $4, %%xmm1 \n\t" /* FRAC_BITS. */
756  "psraw $4, %%xmm5 \n\t" /* FRAC_BITS. */
757  "packuswb %%xmm5, %%xmm1 \n\t"
758 
759  "movdqu %%xmm1, (%%"REG_d") \n\t"
760 
761 snow_inner_add_yblock_sse2_end_16
762 }
763 
764 #define snow_inner_add_yblock_mmx_header \
765  IDWTELEM * * dst_array = sb->line + src_y;\
766  x86_reg tmp;\
767  __asm__ volatile(\
768  "mov %7, %%"REG_c" \n\t"\
769  "mov %6, %2 \n\t"\
770  "mov %4, %%"REG_S" \n\t"\
771  "pxor %%mm7, %%mm7 \n\t" /* 0 */\
772  "pcmpeqd %%mm3, %%mm3 \n\t"\
773  "psllw $15, %%mm3 \n\t"\
774  "psrlw $12, %%mm3 \n\t" /* FRAC_BITS >> 1 */\
775  "1: \n\t"\
776  "mov %1, %%"REG_D" \n\t"\
777  "mov (%%"REG_D"), %%"REG_D" \n\t"\
778  "add %3, %%"REG_D" \n\t"
779 
780 #define snow_inner_add_yblock_mmx_start(out_reg1, out_reg2, ptr_offset, s_offset, d_offset)\
781  "mov "PTR_SIZE"*"ptr_offset"(%%"REG_a"), %%"REG_d"; \n\t"\
782  "movd "d_offset"(%%"REG_d"), %%"out_reg1" \n\t"\
783  "movd "d_offset"+4(%%"REG_d"), %%"out_reg2" \n\t"\
784  "punpcklbw %%mm7, %%"out_reg1" \n\t"\
785  "punpcklbw %%mm7, %%"out_reg2" \n\t"\
786  "movd "s_offset"(%%"REG_S"), %%mm0 \n\t"\
787  "movd "s_offset"+4(%%"REG_S"), %%mm4 \n\t"\
788  "punpcklbw %%mm7, %%mm0 \n\t"\
789  "punpcklbw %%mm7, %%mm4 \n\t"\
790  "pmullw %%mm0, %%"out_reg1" \n\t"\
791  "pmullw %%mm4, %%"out_reg2" \n\t"
792 
793 #define snow_inner_add_yblock_mmx_accum(ptr_offset, s_offset, d_offset) \
794  snow_inner_add_yblock_mmx_start("mm2", "mm6", ptr_offset, s_offset, d_offset)\
795  "paddusw %%mm2, %%mm1 \n\t"\
796  "paddusw %%mm6, %%mm5 \n\t"
797 
798 #define snow_inner_add_yblock_mmx_mix(read_offset, write_offset)\
799  "mov %0, %%"REG_d" \n\t"\
800  "psrlw $4, %%mm1 \n\t"\
801  "psrlw $4, %%mm5 \n\t"\
802  "paddw "read_offset"(%%"REG_D"), %%mm1 \n\t"\
803  "paddw "read_offset"+8(%%"REG_D"), %%mm5 \n\t"\
804  "paddw %%mm3, %%mm1 \n\t"\
805  "paddw %%mm3, %%mm5 \n\t"\
806  "psraw $4, %%mm1 \n\t"\
807  "psraw $4, %%mm5 \n\t"\
808  "packuswb %%mm5, %%mm1 \n\t"\
809  "movq %%mm1, "write_offset"(%%"REG_d") \n\t"
810 
811 #define snow_inner_add_yblock_mmx_end(s_step)\
812  "add $"s_step", %%"REG_S" \n\t"\
813  "add %%"REG_c", "PTR_SIZE"*3(%%"REG_a");\n\t"\
814  "add %%"REG_c", "PTR_SIZE"*2(%%"REG_a");\n\t"\
815  "add %%"REG_c", "PTR_SIZE"*1(%%"REG_a");\n\t"\
816  "add %%"REG_c", (%%"REG_a") \n\t"\
817  "add"OPSIZE " $"PTR_SIZE"*1, %1 \n\t"\
818  "add %%"REG_c", %0 \n\t"\
819  "dec %2 \n\t"\
820  "jnz 1b \n\t"\
821  :"+m"(dst8),"+m"(dst_array),"=&r"(tmp)\
822  :\
823  "rm"((x86_reg)(src_x<<1)),"m"(obmc),"a"(block),"m"(b_h),"m"(src_stride):\
824  "%"REG_c"","%"REG_S"","%"REG_D"","%"REG_d"");
825 
826 static void inner_add_yblock_bw_8_obmc_16_mmx(const uint8_t *obmc, const x86_reg obmc_stride, uint8_t * * block, int b_w, x86_reg b_h,
827  int src_x, int src_y, x86_reg src_stride, slice_buffer * sb, int add, uint8_t * dst8){
828 snow_inner_add_yblock_mmx_header
829 snow_inner_add_yblock_mmx_start("mm1", "mm5", "3", "0", "0")
830 snow_inner_add_yblock_mmx_accum("2", "8", "0")
831 snow_inner_add_yblock_mmx_accum("1", "128", "0")
832 snow_inner_add_yblock_mmx_accum("0", "136", "0")
833 snow_inner_add_yblock_mmx_mix("0", "0")
834 snow_inner_add_yblock_mmx_end("16")
835 }
836 
837 static void inner_add_yblock_bw_16_obmc_32_mmx(const uint8_t *obmc, const x86_reg obmc_stride, uint8_t * * block, int b_w, x86_reg b_h,
838  int src_x, int src_y, x86_reg src_stride, slice_buffer * sb, int add, uint8_t * dst8){
839 snow_inner_add_yblock_mmx_header
840 snow_inner_add_yblock_mmx_start("mm1", "mm5", "3", "0", "0")
841 snow_inner_add_yblock_mmx_accum("2", "16", "0")
842 snow_inner_add_yblock_mmx_accum("1", "512", "0")
843 snow_inner_add_yblock_mmx_accum("0", "528", "0")
844 snow_inner_add_yblock_mmx_mix("0", "0")
845 
846 snow_inner_add_yblock_mmx_start("mm1", "mm5", "3", "8", "8")
847 snow_inner_add_yblock_mmx_accum("2", "24", "8")
848 snow_inner_add_yblock_mmx_accum("1", "520", "8")
849 snow_inner_add_yblock_mmx_accum("0", "536", "8")
850 snow_inner_add_yblock_mmx_mix("16", "8")
851 snow_inner_add_yblock_mmx_end("32")
852 }
853 
854 static void ff_snow_inner_add_yblock_sse2(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
855  int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
856 
857  if (b_w == 16)
858  inner_add_yblock_bw_16_obmc_32_sse2(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
859  else if (b_w == 8 && obmc_stride == 16) {
860  if (!(b_h & 1))
861  inner_add_yblock_bw_8_obmc_16_bh_even_sse2(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
862  else
863  inner_add_yblock_bw_8_obmc_16_mmx(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
864  } else
865  ff_snow_inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
866 }
867 
868 static void ff_snow_inner_add_yblock_mmx(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
869  int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
870  if (b_w == 16)
871  inner_add_yblock_bw_16_obmc_32_mmx(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
872  else if (b_w == 8 && obmc_stride == 16)
873  inner_add_yblock_bw_8_obmc_16_mmx(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
874  else
875  ff_snow_inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
876 }
877 #endif /* HAVE_6REGS */
878 
879 #endif /* HAVE_INLINE_ASM */
880 
881 void ff_dwt_init_x86(SnowDWTContext *c)
882 {
883 #if HAVE_INLINE_ASM
884  int mm_flags = av_get_cpu_flags();
885 
886  if (mm_flags & AV_CPU_FLAG_MMX) {
887  if(mm_flags & AV_CPU_FLAG_SSE2 & 0){
888  c->horizontal_compose97i = ff_snow_horizontal_compose97i_sse2;
889 #if HAVE_7REGS
890  c->vertical_compose97i = ff_snow_vertical_compose97i_sse2;
891 #endif
892 #if HAVE_6REGS
893  c->inner_add_yblock = ff_snow_inner_add_yblock_sse2;
894 #endif
895  }
896  else{
897  if (mm_flags & AV_CPU_FLAG_MMXEXT) {
898  c->horizontal_compose97i = ff_snow_horizontal_compose97i_mmx;
899 #if HAVE_7REGS
900  c->vertical_compose97i = ff_snow_vertical_compose97i_mmx;
901 #endif
902  }
903 #if HAVE_6REGS
904  c->inner_add_yblock = ff_snow_inner_add_yblock_mmx;
905 #endif
906  }
907  }
908 #endif /* HAVE_INLINE_ASM */
909 }
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