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