FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
fdct.c
Go to the documentation of this file.
1 /*
2  * SIMD-optimized forward DCT
3  * The gcc porting is Copyright (c) 2001 Fabrice Bellard.
4  * cleanup/optimizations are Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  * SSE2 optimization is Copyright (c) 2004 Denes Balatoni.
6  *
7  * from fdctam32.c - AP922 MMX(3D-Now) forward-DCT
8  *
9  * Intel Application Note AP-922 - fast, precise implementation of DCT
10  * http://developer.intel.com/vtune/cbts/appnotes.htm
11  *
12  * Also of inspiration:
13  * a page about fdct at http://www.geocities.com/ssavekar/dct.htm
14  * Skal's fdct at http://skal.planet-d.net/coding/dct.html
15  *
16  * This file is part of FFmpeg.
17  *
18  * FFmpeg is free software; you can redistribute it and/or
19  * modify it under the terms of the GNU Lesser General Public
20  * License as published by the Free Software Foundation; either
21  * version 2.1 of the License, or (at your option) any later version.
22  *
23  * FFmpeg is distributed in the hope that it will be useful,
24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26  * Lesser General Public License for more details.
27  *
28  * You should have received a copy of the GNU Lesser General Public
29  * License along with FFmpeg; if not, write to the Free Software
30  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31  */
32 
33 #include "libavutil/common.h"
34 #include "libavutil/x86/asm.h"
35 #include "libavcodec/dct.h"
36 
37 #if HAVE_MMX_INLINE
38 
39 //////////////////////////////////////////////////////////////////////
40 //
41 // constants for the forward DCT
42 // -----------------------------
43 //
44 // Be sure to check that your compiler is aligning all constants to QWORD
45 // (8-byte) memory boundaries! Otherwise the unaligned memory access will
46 // severely stall MMX execution.
47 //
48 //////////////////////////////////////////////////////////////////////
49 
50 #define BITS_FRW_ACC 3 //; 2 or 3 for accuracy
51 #define SHIFT_FRW_COL BITS_FRW_ACC
52 #define SHIFT_FRW_ROW (BITS_FRW_ACC + 17 - 3)
53 #define RND_FRW_ROW (1 << (SHIFT_FRW_ROW-1))
54 //#define RND_FRW_COL (1 << (SHIFT_FRW_COL-1))
55 
56 #define X8(x) x,x,x,x,x,x,x,x
57 
58 //concatenated table, for forward DCT transformation
59 DECLARE_ALIGNED(16, static const int16_t, fdct_tg_all_16)[24] = {
60  X8(13036), // tg * (2<<16) + 0.5
61  X8(27146), // tg * (2<<16) + 0.5
62  X8(-21746) // tg * (2<<16) + 0.5
63 };
64 
65 DECLARE_ALIGNED(16, static const int16_t, ocos_4_16)[8] = {
66  X8(23170) //cos * (2<<15) + 0.5
67 };
68 
69 DECLARE_ALIGNED(16, static const int16_t, fdct_one_corr)[8] = { X8(1) };
70 
71 DECLARE_ALIGNED(8, static const int32_t, fdct_r_row)[2] = {RND_FRW_ROW, RND_FRW_ROW };
72 
73 static const struct
74 {
75  DECLARE_ALIGNED(16, const int32_t, fdct_r_row_sse2)[4];
76 } fdct_r_row_sse2 =
77 {{
78  RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW
79 }};
80 //DECLARE_ALIGNED(16, static const long, fdct_r_row_sse2)[4] = {RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW};
81 
82 DECLARE_ALIGNED(8, static const int16_t, tab_frw_01234567)[] = { // forward_dct coeff table
83  16384, 16384, 22725, 19266,
84  16384, 16384, 12873, 4520,
85  21407, 8867, 19266, -4520,
86  -8867, -21407, -22725, -12873,
87  16384, -16384, 12873, -22725,
88  -16384, 16384, 4520, 19266,
89  8867, -21407, 4520, -12873,
90  21407, -8867, 19266, -22725,
91 
92  22725, 22725, 31521, 26722,
93  22725, 22725, 17855, 6270,
94  29692, 12299, 26722, -6270,
95  -12299, -29692, -31521, -17855,
96  22725, -22725, 17855, -31521,
97  -22725, 22725, 6270, 26722,
98  12299, -29692, 6270, -17855,
99  29692, -12299, 26722, -31521,
100 
101  21407, 21407, 29692, 25172,
102  21407, 21407, 16819, 5906,
103  27969, 11585, 25172, -5906,
104  -11585, -27969, -29692, -16819,
105  21407, -21407, 16819, -29692,
106  -21407, 21407, 5906, 25172,
107  11585, -27969, 5906, -16819,
108  27969, -11585, 25172, -29692,
109 
110  19266, 19266, 26722, 22654,
111  19266, 19266, 15137, 5315,
112  25172, 10426, 22654, -5315,
113  -10426, -25172, -26722, -15137,
114  19266, -19266, 15137, -26722,
115  -19266, 19266, 5315, 22654,
116  10426, -25172, 5315, -15137,
117  25172, -10426, 22654, -26722,
118 
119  16384, 16384, 22725, 19266,
120  16384, 16384, 12873, 4520,
121  21407, 8867, 19266, -4520,
122  -8867, -21407, -22725, -12873,
123  16384, -16384, 12873, -22725,
124  -16384, 16384, 4520, 19266,
125  8867, -21407, 4520, -12873,
126  21407, -8867, 19266, -22725,
127 
128  19266, 19266, 26722, 22654,
129  19266, 19266, 15137, 5315,
130  25172, 10426, 22654, -5315,
131  -10426, -25172, -26722, -15137,
132  19266, -19266, 15137, -26722,
133  -19266, 19266, 5315, 22654,
134  10426, -25172, 5315, -15137,
135  25172, -10426, 22654, -26722,
136 
137  21407, 21407, 29692, 25172,
138  21407, 21407, 16819, 5906,
139  27969, 11585, 25172, -5906,
140  -11585, -27969, -29692, -16819,
141  21407, -21407, 16819, -29692,
142  -21407, 21407, 5906, 25172,
143  11585, -27969, 5906, -16819,
144  27969, -11585, 25172, -29692,
145 
146  22725, 22725, 31521, 26722,
147  22725, 22725, 17855, 6270,
148  29692, 12299, 26722, -6270,
149  -12299, -29692, -31521, -17855,
150  22725, -22725, 17855, -31521,
151  -22725, 22725, 6270, 26722,
152  12299, -29692, 6270, -17855,
153  29692, -12299, 26722, -31521,
154 };
155 
156 static const struct
157 {
158  DECLARE_ALIGNED(16, const int16_t, tab_frw_01234567_sse2)[256];
159 } tab_frw_01234567_sse2 =
160 {{
161 //DECLARE_ALIGNED(16, static const int16_t, tab_frw_01234567_sse2)[] = { // forward_dct coeff table
162 #define TABLE_SSE2 C4, C4, C1, C3, -C6, -C2, -C1, -C5, \
163  C4, C4, C5, C7, C2, C6, C3, -C7, \
164  -C4, C4, C7, C3, C6, -C2, C7, -C5, \
165  C4, -C4, C5, -C1, C2, -C6, C3, -C1,
166 // c1..c7 * cos(pi/4) * 2^15
167 #define C1 22725
168 #define C2 21407
169 #define C3 19266
170 #define C4 16384
171 #define C5 12873
172 #define C6 8867
173 #define C7 4520
174 TABLE_SSE2
175 
176 #undef C1
177 #undef C2
178 #undef C3
179 #undef C4
180 #undef C5
181 #undef C6
182 #undef C7
183 #define C1 31521
184 #define C2 29692
185 #define C3 26722
186 #define C4 22725
187 #define C5 17855
188 #define C6 12299
189 #define C7 6270
190 TABLE_SSE2
191 
192 #undef C1
193 #undef C2
194 #undef C3
195 #undef C4
196 #undef C5
197 #undef C6
198 #undef C7
199 #define C1 29692
200 #define C2 27969
201 #define C3 25172
202 #define C4 21407
203 #define C5 16819
204 #define C6 11585
205 #define C7 5906
206 TABLE_SSE2
207 
208 #undef C1
209 #undef C2
210 #undef C3
211 #undef C4
212 #undef C5
213 #undef C6
214 #undef C7
215 #define C1 26722
216 #define C2 25172
217 #define C3 22654
218 #define C4 19266
219 #define C5 15137
220 #define C6 10426
221 #define C7 5315
222 TABLE_SSE2
223 
224 #undef C1
225 #undef C2
226 #undef C3
227 #undef C4
228 #undef C5
229 #undef C6
230 #undef C7
231 #define C1 22725
232 #define C2 21407
233 #define C3 19266
234 #define C4 16384
235 #define C5 12873
236 #define C6 8867
237 #define C7 4520
238 TABLE_SSE2
239 
240 #undef C1
241 #undef C2
242 #undef C3
243 #undef C4
244 #undef C5
245 #undef C6
246 #undef C7
247 #define C1 26722
248 #define C2 25172
249 #define C3 22654
250 #define C4 19266
251 #define C5 15137
252 #define C6 10426
253 #define C7 5315
254 TABLE_SSE2
255 
256 #undef C1
257 #undef C2
258 #undef C3
259 #undef C4
260 #undef C5
261 #undef C6
262 #undef C7
263 #define C1 29692
264 #define C2 27969
265 #define C3 25172
266 #define C4 21407
267 #define C5 16819
268 #define C6 11585
269 #define C7 5906
270 TABLE_SSE2
271 
272 #undef C1
273 #undef C2
274 #undef C3
275 #undef C4
276 #undef C5
277 #undef C6
278 #undef C7
279 #define C1 31521
280 #define C2 29692
281 #define C3 26722
282 #define C4 22725
283 #define C5 17855
284 #define C6 12299
285 #define C7 6270
286 TABLE_SSE2
287 }};
288 
289 #define S(s) AV_TOSTRING(s) //AV_STRINGIFY is too long
290 
291 #define FDCT_COL(cpu, mm, mov)\
292 static av_always_inline void fdct_col_##cpu(const int16_t *in, int16_t *out, int offset)\
293 {\
294  __asm__ volatile (\
295  #mov" 16(%0), %%"#mm"0 \n\t" \
296  #mov" 96(%0), %%"#mm"1 \n\t" \
297  #mov" %%"#mm"0, %%"#mm"2 \n\t" \
298  #mov" 32(%0), %%"#mm"3 \n\t" \
299  "paddsw %%"#mm"1, %%"#mm"0 \n\t" \
300  #mov" 80(%0), %%"#mm"4 \n\t" \
301  "psllw $"S(SHIFT_FRW_COL)", %%"#mm"0 \n\t" \
302  #mov" (%0), %%"#mm"5 \n\t" \
303  "paddsw %%"#mm"3, %%"#mm"4 \n\t" \
304  "paddsw 112(%0), %%"#mm"5 \n\t" \
305  "psllw $"S(SHIFT_FRW_COL)", %%"#mm"4 \n\t" \
306  #mov" %%"#mm"0, %%"#mm"6 \n\t" \
307  "psubsw %%"#mm"1, %%"#mm"2 \n\t" \
308  #mov" 16(%1), %%"#mm"1 \n\t" \
309  "psubsw %%"#mm"4, %%"#mm"0 \n\t" \
310  #mov" 48(%0), %%"#mm"7 \n\t" \
311  "pmulhw %%"#mm"0, %%"#mm"1 \n\t" \
312  "paddsw 64(%0), %%"#mm"7 \n\t" \
313  "psllw $"S(SHIFT_FRW_COL)", %%"#mm"5 \n\t" \
314  "paddsw %%"#mm"4, %%"#mm"6 \n\t" \
315  "psllw $"S(SHIFT_FRW_COL)", %%"#mm"7 \n\t" \
316  #mov" %%"#mm"5, %%"#mm"4 \n\t" \
317  "psubsw %%"#mm"7, %%"#mm"5 \n\t" \
318  "paddsw %%"#mm"5, %%"#mm"1 \n\t" \
319  "paddsw %%"#mm"7, %%"#mm"4 \n\t" \
320  "por (%2), %%"#mm"1 \n\t" \
321  "psllw $"S(SHIFT_FRW_COL)"+1, %%"#mm"2 \n\t" \
322  "pmulhw 16(%1), %%"#mm"5 \n\t" \
323  #mov" %%"#mm"4, %%"#mm"7 \n\t" \
324  "psubsw 80(%0), %%"#mm"3 \n\t" \
325  "psubsw %%"#mm"6, %%"#mm"4 \n\t" \
326  #mov" %%"#mm"1, 32(%3) \n\t" \
327  "paddsw %%"#mm"6, %%"#mm"7 \n\t" \
328  #mov" 48(%0), %%"#mm"1 \n\t" \
329  "psllw $"S(SHIFT_FRW_COL)"+1, %%"#mm"3 \n\t" \
330  "psubsw 64(%0), %%"#mm"1 \n\t" \
331  #mov" %%"#mm"2, %%"#mm"6 \n\t" \
332  #mov" %%"#mm"4, 64(%3) \n\t" \
333  "paddsw %%"#mm"3, %%"#mm"2 \n\t" \
334  "pmulhw (%4), %%"#mm"2 \n\t" \
335  "psubsw %%"#mm"3, %%"#mm"6 \n\t" \
336  "pmulhw (%4), %%"#mm"6 \n\t" \
337  "psubsw %%"#mm"0, %%"#mm"5 \n\t" \
338  "por (%2), %%"#mm"5 \n\t" \
339  "psllw $"S(SHIFT_FRW_COL)", %%"#mm"1 \n\t" \
340  "por (%2), %%"#mm"2 \n\t" \
341  #mov" %%"#mm"1, %%"#mm"4 \n\t" \
342  #mov" (%0), %%"#mm"3 \n\t" \
343  "paddsw %%"#mm"6, %%"#mm"1 \n\t" \
344  "psubsw 112(%0), %%"#mm"3 \n\t" \
345  "psubsw %%"#mm"6, %%"#mm"4 \n\t" \
346  #mov" (%1), %%"#mm"0 \n\t" \
347  "psllw $"S(SHIFT_FRW_COL)", %%"#mm"3 \n\t" \
348  #mov" 32(%1), %%"#mm"6 \n\t" \
349  "pmulhw %%"#mm"1, %%"#mm"0 \n\t" \
350  #mov" %%"#mm"7, (%3) \n\t" \
351  "pmulhw %%"#mm"4, %%"#mm"6 \n\t" \
352  #mov" %%"#mm"5, 96(%3) \n\t" \
353  #mov" %%"#mm"3, %%"#mm"7 \n\t" \
354  #mov" 32(%1), %%"#mm"5 \n\t" \
355  "psubsw %%"#mm"2, %%"#mm"7 \n\t" \
356  "paddsw %%"#mm"2, %%"#mm"3 \n\t" \
357  "pmulhw %%"#mm"7, %%"#mm"5 \n\t" \
358  "paddsw %%"#mm"3, %%"#mm"0 \n\t" \
359  "paddsw %%"#mm"4, %%"#mm"6 \n\t" \
360  "pmulhw (%1), %%"#mm"3 \n\t" \
361  "por (%2), %%"#mm"0 \n\t" \
362  "paddsw %%"#mm"7, %%"#mm"5 \n\t" \
363  "psubsw %%"#mm"6, %%"#mm"7 \n\t" \
364  #mov" %%"#mm"0, 16(%3) \n\t" \
365  "paddsw %%"#mm"4, %%"#mm"5 \n\t" \
366  #mov" %%"#mm"7, 48(%3) \n\t" \
367  "psubsw %%"#mm"1, %%"#mm"3 \n\t" \
368  #mov" %%"#mm"5, 80(%3) \n\t" \
369  #mov" %%"#mm"3, 112(%3) \n\t" \
370  : \
371  : "r" (in + offset), "r" (fdct_tg_all_16), "r" (fdct_one_corr), \
372  "r" (out + offset), "r" (ocos_4_16)); \
373 }
374 
375 FDCT_COL(mmx, mm, movq)
376 FDCT_COL(sse2, xmm, movdqa)
377 
378 static av_always_inline void fdct_row_sse2(const int16_t *in, int16_t *out)
379 {
380  __asm__ volatile(
381 #define FDCT_ROW_SSE2_H1(i,t) \
382  "movq " #i "(%0), %%xmm2 \n\t" \
383  "movq " #i "+8(%0), %%xmm0 \n\t" \
384  "movdqa " #t "+32(%1), %%xmm3 \n\t" \
385  "movdqa " #t "+48(%1), %%xmm7 \n\t" \
386  "movdqa " #t "(%1), %%xmm4 \n\t" \
387  "movdqa " #t "+16(%1), %%xmm5 \n\t"
388 
389 #define FDCT_ROW_SSE2_H2(i,t) \
390  "movq " #i "(%0), %%xmm2 \n\t" \
391  "movq " #i "+8(%0), %%xmm0 \n\t" \
392  "movdqa " #t "+32(%1), %%xmm3 \n\t" \
393  "movdqa " #t "+48(%1), %%xmm7 \n\t"
394 
395 #define FDCT_ROW_SSE2(i) \
396  "movq %%xmm2, %%xmm1 \n\t" \
397  "pshuflw $27, %%xmm0, %%xmm0 \n\t" \
398  "paddsw %%xmm0, %%xmm1 \n\t" \
399  "psubsw %%xmm0, %%xmm2 \n\t" \
400  "punpckldq %%xmm2, %%xmm1 \n\t" \
401  "pshufd $78, %%xmm1, %%xmm2 \n\t" \
402  "pmaddwd %%xmm2, %%xmm3 \n\t" \
403  "pmaddwd %%xmm1, %%xmm7 \n\t" \
404  "pmaddwd %%xmm5, %%xmm2 \n\t" \
405  "pmaddwd %%xmm4, %%xmm1 \n\t" \
406  "paddd %%xmm7, %%xmm3 \n\t" \
407  "paddd %%xmm2, %%xmm1 \n\t" \
408  "paddd %%xmm6, %%xmm3 \n\t" \
409  "paddd %%xmm6, %%xmm1 \n\t" \
410  "psrad %3, %%xmm3 \n\t" \
411  "psrad %3, %%xmm1 \n\t" \
412  "packssdw %%xmm3, %%xmm1 \n\t" \
413  "movdqa %%xmm1, " #i "(%4) \n\t"
414 
415  "movdqa (%2), %%xmm6 \n\t"
416  FDCT_ROW_SSE2_H1(0,0)
417  FDCT_ROW_SSE2(0)
418  FDCT_ROW_SSE2_H2(64,0)
419  FDCT_ROW_SSE2(64)
420 
421  FDCT_ROW_SSE2_H1(16,64)
422  FDCT_ROW_SSE2(16)
423  FDCT_ROW_SSE2_H2(112,64)
424  FDCT_ROW_SSE2(112)
425 
426  FDCT_ROW_SSE2_H1(32,128)
427  FDCT_ROW_SSE2(32)
428  FDCT_ROW_SSE2_H2(96,128)
429  FDCT_ROW_SSE2(96)
430 
431  FDCT_ROW_SSE2_H1(48,192)
432  FDCT_ROW_SSE2(48)
433  FDCT_ROW_SSE2_H2(80,192)
434  FDCT_ROW_SSE2(80)
435  :
436  : "r" (in), "r" (tab_frw_01234567_sse2.tab_frw_01234567_sse2),
437  "r" (fdct_r_row_sse2.fdct_r_row_sse2), "i" (SHIFT_FRW_ROW), "r" (out)
438  XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
439  "%xmm4", "%xmm5", "%xmm6", "%xmm7")
440  );
441 }
442 
443 static av_always_inline void fdct_row_mmxext(const int16_t *in, int16_t *out,
444  const int16_t *table)
445 {
446  __asm__ volatile (
447  "pshufw $0x1B, 8(%0), %%mm5 \n\t"
448  "movq (%0), %%mm0 \n\t"
449  "movq %%mm0, %%mm1 \n\t"
450  "paddsw %%mm5, %%mm0 \n\t"
451  "psubsw %%mm5, %%mm1 \n\t"
452  "movq %%mm0, %%mm2 \n\t"
453  "punpckldq %%mm1, %%mm0 \n\t"
454  "punpckhdq %%mm1, %%mm2 \n\t"
455  "movq (%1), %%mm1 \n\t"
456  "movq 8(%1), %%mm3 \n\t"
457  "movq 16(%1), %%mm4 \n\t"
458  "movq 24(%1), %%mm5 \n\t"
459  "movq 32(%1), %%mm6 \n\t"
460  "movq 40(%1), %%mm7 \n\t"
461  "pmaddwd %%mm0, %%mm1 \n\t"
462  "pmaddwd %%mm2, %%mm3 \n\t"
463  "pmaddwd %%mm0, %%mm4 \n\t"
464  "pmaddwd %%mm2, %%mm5 \n\t"
465  "pmaddwd %%mm0, %%mm6 \n\t"
466  "pmaddwd %%mm2, %%mm7 \n\t"
467  "pmaddwd 48(%1), %%mm0 \n\t"
468  "pmaddwd 56(%1), %%mm2 \n\t"
469  "paddd %%mm1, %%mm3 \n\t"
470  "paddd %%mm4, %%mm5 \n\t"
471  "paddd %%mm6, %%mm7 \n\t"
472  "paddd %%mm0, %%mm2 \n\t"
473  "movq (%2), %%mm0 \n\t"
474  "paddd %%mm0, %%mm3 \n\t"
475  "paddd %%mm0, %%mm5 \n\t"
476  "paddd %%mm0, %%mm7 \n\t"
477  "paddd %%mm0, %%mm2 \n\t"
478  "psrad $"S(SHIFT_FRW_ROW)", %%mm3 \n\t"
479  "psrad $"S(SHIFT_FRW_ROW)", %%mm5 \n\t"
480  "psrad $"S(SHIFT_FRW_ROW)", %%mm7 \n\t"
481  "psrad $"S(SHIFT_FRW_ROW)", %%mm2 \n\t"
482  "packssdw %%mm5, %%mm3 \n\t"
483  "packssdw %%mm2, %%mm7 \n\t"
484  "movq %%mm3, (%3) \n\t"
485  "movq %%mm7, 8(%3) \n\t"
486  :
487  : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out));
488 }
489 
490 static av_always_inline void fdct_row_mmx(const int16_t *in, int16_t *out, const int16_t *table)
491 {
492  //FIXME reorder (I do not have an old MMX-only CPU here to benchmark ...)
493  __asm__ volatile(
494  "movd 12(%0), %%mm1 \n\t"
495  "punpcklwd 8(%0), %%mm1 \n\t"
496  "movq %%mm1, %%mm2 \n\t"
497  "psrlq $0x20, %%mm1 \n\t"
498  "movq 0(%0), %%mm0 \n\t"
499  "punpcklwd %%mm2, %%mm1 \n\t"
500  "movq %%mm0, %%mm5 \n\t"
501  "paddsw %%mm1, %%mm0 \n\t"
502  "psubsw %%mm1, %%mm5 \n\t"
503  "movq %%mm0, %%mm2 \n\t"
504  "punpckldq %%mm5, %%mm0 \n\t"
505  "punpckhdq %%mm5, %%mm2 \n\t"
506  "movq 0(%1), %%mm1 \n\t"
507  "movq 8(%1), %%mm3 \n\t"
508  "movq 16(%1), %%mm4 \n\t"
509  "movq 24(%1), %%mm5 \n\t"
510  "movq 32(%1), %%mm6 \n\t"
511  "movq 40(%1), %%mm7 \n\t"
512  "pmaddwd %%mm0, %%mm1 \n\t"
513  "pmaddwd %%mm2, %%mm3 \n\t"
514  "pmaddwd %%mm0, %%mm4 \n\t"
515  "pmaddwd %%mm2, %%mm5 \n\t"
516  "pmaddwd %%mm0, %%mm6 \n\t"
517  "pmaddwd %%mm2, %%mm7 \n\t"
518  "pmaddwd 48(%1), %%mm0 \n\t"
519  "pmaddwd 56(%1), %%mm2 \n\t"
520  "paddd %%mm1, %%mm3 \n\t"
521  "paddd %%mm4, %%mm5 \n\t"
522  "paddd %%mm6, %%mm7 \n\t"
523  "paddd %%mm0, %%mm2 \n\t"
524  "movq (%2), %%mm0 \n\t"
525  "paddd %%mm0, %%mm3 \n\t"
526  "paddd %%mm0, %%mm5 \n\t"
527  "paddd %%mm0, %%mm7 \n\t"
528  "paddd %%mm0, %%mm2 \n\t"
529  "psrad $"S(SHIFT_FRW_ROW)", %%mm3 \n\t"
530  "psrad $"S(SHIFT_FRW_ROW)", %%mm5 \n\t"
531  "psrad $"S(SHIFT_FRW_ROW)", %%mm7 \n\t"
532  "psrad $"S(SHIFT_FRW_ROW)", %%mm2 \n\t"
533  "packssdw %%mm5, %%mm3 \n\t"
534  "packssdw %%mm2, %%mm7 \n\t"
535  "movq %%mm3, 0(%3) \n\t"
536  "movq %%mm7, 8(%3) \n\t"
537  :
538  : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out));
539 }
540 
541 void ff_fdct_mmx(int16_t *block)
542 {
543  DECLARE_ALIGNED(8, int64_t, align_tmp)[16];
544  int16_t * block1= (int16_t*)align_tmp;
545  const int16_t *table= tab_frw_01234567;
546  int i;
547 
548  fdct_col_mmx(block, block1, 0);
549  fdct_col_mmx(block, block1, 4);
550 
551  for(i=8;i>0;i--) {
552  fdct_row_mmx(block1, block, table);
553  block1 += 8;
554  table += 32;
555  block += 8;
556  }
557 }
558 
559 #endif /* HAVE_MMX_INLINE */
560 
561 #if HAVE_MMXEXT_INLINE
562 
563 void ff_fdct_mmxext(int16_t *block)
564 {
565  DECLARE_ALIGNED(8, int64_t, align_tmp)[16];
566  int16_t *block1= (int16_t*)align_tmp;
567  const int16_t *table= tab_frw_01234567;
568  int i;
569 
570  fdct_col_mmx(block, block1, 0);
571  fdct_col_mmx(block, block1, 4);
572 
573  for(i=8;i>0;i--) {
574  fdct_row_mmxext(block1, block, table);
575  block1 += 8;
576  table += 32;
577  block += 8;
578  }
579 }
580 
581 #endif /* HAVE_MMXEXT_INLINE */
582 
583 #if HAVE_SSE2_INLINE
584 
585 void ff_fdct_sse2(int16_t *block)
586 {
587  DECLARE_ALIGNED(16, int64_t, align_tmp)[16];
588  int16_t * const block1= (int16_t*)align_tmp;
589 
590  fdct_col_sse2(block, block1, 0);
591  fdct_row_sse2(block1, block);
592 }
593 
594 #endif /* HAVE_SSE2_INLINE */
Generated on Sun Jul 20 2014 23:05:58 for FFmpeg by   doxygen 1.8.2