idct_mmx.c
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1 /*
2  * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
3  *
4  * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
5  * See http://libmpeg2.sourceforge.net/ for updates.
6  *
7  * mpeg2dec is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * mpeg2dec 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
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with mpeg2dec; 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/common.h"
23 #include "libavcodec/dsputil.h"
24 
25 #include "libavutil/x86_cpu.h"
26 #include "dsputil_mmx.h"
27 
28 #define ROW_SHIFT 11
29 #define COL_SHIFT 6
30 
31 #define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))
32 #define rounder(bias) {round (bias), round (bias)}
33 
34 
35 #if 0
36 /* C row IDCT - it is just here to document the MMXEXT and MMX versions */
37 static inline void idct_row (int16_t * row, int offset,
38  int16_t * table, int32_t * rounder)
39 {
40  int C1, C2, C3, C4, C5, C6, C7;
41  int a0, a1, a2, a3, b0, b1, b2, b3;
42 
43  row += offset;
44 
45  C1 = table[1];
46  C2 = table[2];
47  C3 = table[3];
48  C4 = table[4];
49  C5 = table[5];
50  C6 = table[6];
51  C7 = table[7];
52 
53  a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder;
54  a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder;
55  a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder;
56  a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder;
57 
58  b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
59  b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
60  b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
61  b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
62 
63  row[0] = (a0 + b0) >> ROW_SHIFT;
64  row[1] = (a1 + b1) >> ROW_SHIFT;
65  row[2] = (a2 + b2) >> ROW_SHIFT;
66  row[3] = (a3 + b3) >> ROW_SHIFT;
67  row[4] = (a3 - b3) >> ROW_SHIFT;
68  row[5] = (a2 - b2) >> ROW_SHIFT;
69  row[6] = (a1 - b1) >> ROW_SHIFT;
70  row[7] = (a0 - b0) >> ROW_SHIFT;
71 }
72 #endif
73 
74 
75 /* MMXEXT row IDCT */
76 
77 #define mmxext_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, -c4, -c2, \
78  c4, c6, c4, c6, \
79  c1, c3, -c1, -c5, \
80  c5, c7, c3, -c7, \
81  c4, -c6, c4, -c6, \
82  -c4, c2, c4, -c2, \
83  c5, -c1, c3, -c1, \
84  c7, c3, c7, -c5 }
85 
86 static inline void mmxext_row_head (int16_t * const row, const int offset,
87  const int16_t * const table)
88 {
89  __asm__ volatile(
90  "movq (%0), %%mm2 \n\t" /* mm2 = x6 x4 x2 x0 */
91 
92  "movq 8(%0), %%mm5 \n\t" /* mm5 = x7 x5 x3 x1 */
93  "movq %%mm2, %%mm0 \n\t" /* mm0 = x6 x4 x2 x0 */
94 
95  "movq (%1), %%mm3 \n\t" /* mm3 = -C2 -C4 C2 C4 */
96  "movq %%mm5, %%mm6 \n\t" /* mm6 = x7 x5 x3 x1 */
97 
98  "movq 8(%1), %%mm4 \n\t" /* mm4 = C6 C4 C6 C4 */
99  "pmaddwd %%mm0, %%mm3 \n\t" /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */
100 
101  "pshufw $0x4e, %%mm2, %%mm2 \n\t" /* mm2 = x2 x0 x6 x4 */
102  :: "r" ((row+offset)), "r" (table)
103  );
104 }
105 
106 static inline void mmxext_row (const int16_t * const table,
107  const int32_t * const rounder)
108 {
109  __asm__ volatile (
110  "movq 16(%0), %%mm1 \n\t" /* mm1 = -C5 -C1 C3 C1 */
111  "pmaddwd %%mm2, %%mm4 \n\t" /* mm4 = C4*x0+C6*x2 C4*x4+C6*x6 */
112 
113  "pmaddwd 32(%0), %%mm0 \n\t" /* mm0 = C4*x4-C6*x6 C4*x0-C6*x2 */
114  "pshufw $0x4e, %%mm6, %%mm6 \n\t" /* mm6 = x3 x1 x7 x5 */
115 
116  "movq 24(%0), %%mm7 \n\t" /* mm7 = -C7 C3 C7 C5 */
117  "pmaddwd %%mm5, %%mm1 \n\t" /* mm1= -C1*x5-C5*x7 C1*x1+C3*x3 */
118 
119  "paddd (%1), %%mm3 \n\t" /* mm3 += rounder */
120  "pmaddwd %%mm6, %%mm7 \n\t" /* mm7 = C3*x1-C7*x3 C5*x5+C7*x7 */
121 
122  "pmaddwd 40(%0), %%mm2 \n\t" /* mm2= C4*x0-C2*x2 -C4*x4+C2*x6 */
123  "paddd %%mm4, %%mm3 \n\t" /* mm3 = a1 a0 + rounder */
124 
125  "pmaddwd 48(%0), %%mm5 \n\t" /* mm5 = C3*x5-C1*x7 C5*x1-C1*x3 */
126  "movq %%mm3, %%mm4 \n\t" /* mm4 = a1 a0 + rounder */
127 
128  "pmaddwd 56(%0), %%mm6 \n\t" /* mm6 = C7*x1-C5*x3 C7*x5+C3*x7 */
129  "paddd %%mm7, %%mm1 \n\t" /* mm1 = b1 b0 */
130 
131  "paddd (%1), %%mm0 \n\t" /* mm0 += rounder */
132  "psubd %%mm1, %%mm3 \n\t" /* mm3 = a1-b1 a0-b0 + rounder */
133 
134  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm3 \n\t" /* mm3 = y6 y7 */
135  "paddd %%mm4, %%mm1 \n\t" /* mm1 = a1+b1 a0+b0 + rounder */
136 
137  "paddd %%mm2, %%mm0 \n\t" /* mm0 = a3 a2 + rounder */
138  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm1 \n\t" /* mm1 = y1 y0 */
139 
140  "paddd %%mm6, %%mm5 \n\t" /* mm5 = b3 b2 */
141  "movq %%mm0, %%mm4 \n\t" /* mm4 = a3 a2 + rounder */
142 
143  "paddd %%mm5, %%mm0 \n\t" /* mm0 = a3+b3 a2+b2 + rounder */
144  "psubd %%mm5, %%mm4 \n\t" /* mm4 = a3-b3 a2-b2 + rounder */
145  : : "r" (table), "r" (rounder));
146 }
147 
148 static inline void mmxext_row_tail (int16_t * const row, const int store)
149 {
150  __asm__ volatile (
151  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0 \n\t" /* mm0 = y3 y2 */
152 
153  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm4 \n\t" /* mm4 = y4 y5 */
154 
155  "packssdw %%mm0, %%mm1 \n\t" /* mm1 = y3 y2 y1 y0 */
156 
157  "packssdw %%mm3, %%mm4 \n\t" /* mm4 = y6 y7 y4 y5 */
158 
159  "movq %%mm1, (%0) \n\t" /* save y3 y2 y1 y0 */
160  "pshufw $0xb1, %%mm4, %%mm4 \n\t" /* mm4 = y7 y6 y5 y4 */
161 
162  /* slot */
163 
164  "movq %%mm4, 8(%0) \n\t" /* save y7 y6 y5 y4 */
165  :: "r" (row+store)
166  );
167 }
168 
169 static inline void mmxext_row_mid (int16_t * const row, const int store,
170  const int offset,
171  const int16_t * const table)
172 {
173  __asm__ volatile (
174  "movq (%0,%1), %%mm2 \n\t" /* mm2 = x6 x4 x2 x0 */
175  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0 \n\t" /* mm0 = y3 y2 */
176 
177  "movq 8(%0,%1), %%mm5 \n\t" /* mm5 = x7 x5 x3 x1 */
178  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm4 \n\t" /* mm4 = y4 y5 */
179 
180  "packssdw %%mm0, %%mm1 \n\t" /* mm1 = y3 y2 y1 y0 */
181  "movq %%mm5, %%mm6 \n\t" /* mm6 = x7 x5 x3 x1 */
182 
183  "packssdw %%mm3, %%mm4 \n\t" /* mm4 = y6 y7 y4 y5 */
184  "movq %%mm2, %%mm0 \n\t" /* mm0 = x6 x4 x2 x0 */
185 
186  "movq %%mm1, (%0,%2) \n\t" /* save y3 y2 y1 y0 */
187  "pshufw $0xb1, %%mm4, %%mm4\n\t" /* mm4 = y7 y6 y5 y4 */
188 
189  "movq (%3), %%mm3 \n\t" /* mm3 = -C2 -C4 C2 C4 */
190  "movq %%mm4, 8(%0,%2) \n\t" /* save y7 y6 y5 y4 */
191 
192  "pmaddwd %%mm0, %%mm3 \n\t" /* mm3= -C4*x4-C2*x6 C4*x0+C2*x2 */
193 
194  "movq 8(%3), %%mm4 \n\t" /* mm4 = C6 C4 C6 C4 */
195  "pshufw $0x4e, %%mm2, %%mm2\n\t" /* mm2 = x2 x0 x6 x4 */
196  :: "r" (row), "r" ((x86_reg) (2*offset)), "r" ((x86_reg) (2*store)), "r" (table)
197  );
198 }
199 
200 
201 /* MMX row IDCT */
202 
203 #define mmx_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, c4, c6, \
204  c4, c6, -c4, -c2, \
205  c1, c3, c3, -c7, \
206  c5, c7, -c1, -c5, \
207  c4, -c6, c4, -c2, \
208  -c4, c2, c4, -c6, \
209  c5, -c1, c7, -c5, \
210  c7, c3, c3, -c1 }
211 
212 static inline void mmx_row_head (int16_t * const row, const int offset,
213  const int16_t * const table)
214 {
215  __asm__ volatile (
216  "movq (%0), %%mm2 \n\t" /* mm2 = x6 x4 x2 x0 */
217 
218  "movq 8(%0), %%mm5 \n\t" /* mm5 = x7 x5 x3 x1 */
219  "movq %%mm2, %%mm0 \n\t" /* mm0 = x6 x4 x2 x0 */
220 
221  "movq (%1), %%mm3 \n\t" /* mm3 = C6 C4 C2 C4 */
222  "movq %%mm5, %%mm6 \n\t" /* mm6 = x7 x5 x3 x1 */
223 
224  "punpckldq %%mm0, %%mm0 \n\t" /* mm0 = x2 x0 x2 x0 */
225 
226  "movq 8(%1), %%mm4 \n\t" /* mm4 = -C2 -C4 C6 C4 */
227  "pmaddwd %%mm0, %%mm3 \n\t" /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */
228 
229  "movq 16(%1), %%mm1 \n\t" /* mm1 = -C7 C3 C3 C1 */
230  "punpckhdq %%mm2, %%mm2 \n\t" /* mm2 = x6 x4 x6 x4 */
231  :: "r" ((row+offset)), "r" (table)
232  );
233 }
234 
235 static inline void mmx_row (const int16_t * const table,
236  const int32_t * const rounder)
237 {
238  __asm__ volatile (
239  "pmaddwd %%mm2, %%mm4 \n\t" /* mm4 = -C4*x4-C2*x6 C4*x4+C6*x6 */
240  "punpckldq %%mm5, %%mm5 \n\t" /* mm5 = x3 x1 x3 x1 */
241 
242  "pmaddwd 32(%0), %%mm0 \n\t" /* mm0 = C4*x0-C2*x2 C4*x0-C6*x2 */
243  "punpckhdq %%mm6, %%mm6 \n\t" /* mm6 = x7 x5 x7 x5 */
244 
245  "movq 24(%0), %%mm7 \n\t" /* mm7 = -C5 -C1 C7 C5 */
246  "pmaddwd %%mm5, %%mm1 \n\t" /* mm1 = C3*x1-C7*x3 C1*x1+C3*x3 */
247 
248  "paddd (%1), %%mm3 \n\t" /* mm3 += rounder */
249  "pmaddwd %%mm6, %%mm7 \n\t" /* mm7 = -C1*x5-C5*x7 C5*x5+C7*x7 */
250 
251  "pmaddwd 40(%0), %%mm2 \n\t" /* mm2 = C4*x4-C6*x6 -C4*x4+C2*x6 */
252  "paddd %%mm4, %%mm3 \n\t" /* mm3 = a1 a0 + rounder */
253 
254  "pmaddwd 48(%0), %%mm5 \n\t" /* mm5 = C7*x1-C5*x3 C5*x1-C1*x3 */
255  "movq %%mm3, %%mm4 \n\t" /* mm4 = a1 a0 + rounder */
256 
257  "pmaddwd 56(%0), %%mm6 \n\t" /* mm6 = C3*x5-C1*x7 C7*x5+C3*x7 */
258  "paddd %%mm7, %%mm1 \n\t" /* mm1 = b1 b0 */
259 
260  "paddd (%1), %%mm0 \n\t" /* mm0 += rounder */
261  "psubd %%mm1, %%mm3 \n\t" /* mm3 = a1-b1 a0-b0 + rounder */
262 
263  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm3 \n\t" /* mm3 = y6 y7 */
264  "paddd %%mm4, %%mm1 \n\t" /* mm1 = a1+b1 a0+b0 + rounder */
265 
266  "paddd %%mm2, %%mm0 \n\t" /* mm0 = a3 a2 + rounder */
267  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm1 \n\t" /* mm1 = y1 y0 */
268 
269  "paddd %%mm6, %%mm5 \n\t" /* mm5 = b3 b2 */
270  "movq %%mm0, %%mm7 \n\t" /* mm7 = a3 a2 + rounder */
271 
272  "paddd %%mm5, %%mm0 \n\t" /* mm0 = a3+b3 a2+b2 + rounder */
273  "psubd %%mm5, %%mm7 \n\t" /* mm7 = a3-b3 a2-b2 + rounder */
274  :: "r" (table), "r" (rounder)
275  );
276 }
277 
278 static inline void mmx_row_tail (int16_t * const row, const int store)
279 {
280  __asm__ volatile (
281  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0 \n\t" /* mm0 = y3 y2 */
282 
283  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm7 \n\t" /* mm7 = y4 y5 */
284 
285  "packssdw %%mm0, %%mm1 \n\t" /* mm1 = y3 y2 y1 y0 */
286 
287  "packssdw %%mm3, %%mm7 \n\t" /* mm7 = y6 y7 y4 y5 */
288 
289  "movq %%mm1, (%0) \n\t" /* save y3 y2 y1 y0 */
290  "movq %%mm7, %%mm4 \n\t" /* mm4 = y6 y7 y4 y5 */
291 
292  "pslld $16, %%mm7 \n\t" /* mm7 = y7 0 y5 0 */
293 
294  "psrld $16, %%mm4 \n\t" /* mm4 = 0 y6 0 y4 */
295 
296  "por %%mm4, %%mm7 \n\t" /* mm7 = y7 y6 y5 y4 */
297 
298  /* slot */
299 
300  "movq %%mm7, 8(%0) \n\t" /* save y7 y6 y5 y4 */
301  :: "r" (row+store)
302  );
303 }
304 
305 static inline void mmx_row_mid (int16_t * const row, const int store,
306  const int offset, const int16_t * const table)
307 {
308 
309  __asm__ volatile (
310  "movq (%0,%1), %%mm2 \n\t" /* mm2 = x6 x4 x2 x0 */
311  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0 \n\t" /* mm0 = y3 y2 */
312 
313  "movq 8(%0,%1), %%mm5 \n\t" /* mm5 = x7 x5 x3 x1 */
314  "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm7 \n\t" /* mm7 = y4 y5 */
315 
316  "packssdw %%mm0, %%mm1 \n\t" /* mm1 = y3 y2 y1 y0 */
317  "movq %%mm5, %%mm6 \n\t" /* mm6 = x7 x5 x3 x1 */
318 
319  "packssdw %%mm3, %%mm7 \n\t" /* mm7 = y6 y7 y4 y5 */
320  "movq %%mm2, %%mm0 \n\t" /* mm0 = x6 x4 x2 x0 */
321 
322  "movq %%mm1, (%0,%2) \n\t" /* save y3 y2 y1 y0 */
323  "movq %%mm7, %%mm1 \n\t" /* mm1 = y6 y7 y4 y5 */
324 
325  "punpckldq %%mm0, %%mm0 \n\t" /* mm0 = x2 x0 x2 x0 */
326  "psrld $16, %%mm7 \n\t" /* mm7 = 0 y6 0 y4 */
327 
328  "movq (%3), %%mm3 \n\t" /* mm3 = C6 C4 C2 C4 */
329  "pslld $16, %%mm1 \n\t" /* mm1 = y7 0 y5 0 */
330 
331  "movq 8(%3), %%mm4 \n\t" /* mm4 = -C2 -C4 C6 C4 */
332  "por %%mm1, %%mm7 \n\t" /* mm7 = y7 y6 y5 y4 */
333 
334  "movq 16(%3), %%mm1 \n\t" /* mm1 = -C7 C3 C3 C1 */
335  "punpckhdq %%mm2, %%mm2 \n\t" /* mm2 = x6 x4 x6 x4 */
336 
337  "movq %%mm7, 8(%0,%2) \n\t" /* save y7 y6 y5 y4 */
338  "pmaddwd %%mm0, %%mm3 \n\t" /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */
339  : : "r" (row), "r" ((x86_reg) (2*offset)), "r" ((x86_reg) (2*store)), "r" (table)
340  );
341 }
342 
343 
344 #if 0
345 /* C column IDCT - it is just here to document the MMXEXT and MMX versions */
346 static inline void idct_col (int16_t * col, int offset)
347 {
348 /* multiplication - as implemented on mmx */
349 #define F(c,x) (((c) * (x)) >> 16)
350 
351 /* saturation - it helps us handle torture test cases */
352 #define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x))
353 
354  int16_t x0, x1, x2, x3, x4, x5, x6, x7;
355  int16_t y0, y1, y2, y3, y4, y5, y6, y7;
356  int16_t a0, a1, a2, a3, b0, b1, b2, b3;
357  int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12;
358 
359  col += offset;
360 
361  x0 = col[0*8];
362  x1 = col[1*8];
363  x2 = col[2*8];
364  x3 = col[3*8];
365  x4 = col[4*8];
366  x5 = col[5*8];
367  x6 = col[6*8];
368  x7 = col[7*8];
369 
370  u04 = S (x0 + x4);
371  v04 = S (x0 - x4);
372  u26 = S (F (T2, x6) + x2);
373  v26 = S (F (T2, x2) - x6);
374 
375  a0 = S (u04 + u26);
376  a1 = S (v04 + v26);
377  a2 = S (v04 - v26);
378  a3 = S (u04 - u26);
379 
380  u17 = S (F (T1, x7) + x1);
381  v17 = S (F (T1, x1) - x7);
382  u35 = S (F (T3, x5) + x3);
383  v35 = S (F (T3, x3) - x5);
384 
385  b0 = S (u17 + u35);
386  b3 = S (v17 - v35);
387  u12 = S (u17 - u35);
388  v12 = S (v17 + v35);
389  u12 = S (2 * F (C4, u12));
390  v12 = S (2 * F (C4, v12));
391  b1 = S (u12 + v12);
392  b2 = S (u12 - v12);
393 
394  y0 = S (a0 + b0) >> COL_SHIFT;
395  y1 = S (a1 + b1) >> COL_SHIFT;
396  y2 = S (a2 + b2) >> COL_SHIFT;
397  y3 = S (a3 + b3) >> COL_SHIFT;
398 
399  y4 = S (a3 - b3) >> COL_SHIFT;
400  y5 = S (a2 - b2) >> COL_SHIFT;
401  y6 = S (a1 - b1) >> COL_SHIFT;
402  y7 = S (a0 - b0) >> COL_SHIFT;
403 
404  col[0*8] = y0;
405  col[1*8] = y1;
406  col[2*8] = y2;
407  col[3*8] = y3;
408  col[4*8] = y4;
409  col[5*8] = y5;
410  col[6*8] = y6;
411  col[7*8] = y7;
412 }
413 #endif
414 
415 
416 /* MMX column IDCT */
417 static inline void idct_col (int16_t * const col, const int offset)
418 {
419 #define T1 13036
420 #define T2 27146
421 #define T3 43790
422 #define C4 23170
423 
424  DECLARE_ALIGNED(8, static const short, t1_vector)[] = {
425  T1,T1,T1,T1,
426  T2,T2,T2,T2,
427  T3,T3,T3,T3,
428  C4,C4,C4,C4
429  };
430 
431  /* column code adapted from Peter Gubanov */
432  /* http://www.elecard.com/peter/idct.shtml */
433 
434  __asm__ volatile (
435  "movq (%0), %%mm0 \n\t" /* mm0 = T1 */
436 
437  "movq 2*8(%1), %%mm1 \n\t" /* mm1 = x1 */
438  "movq %%mm0, %%mm2 \n\t" /* mm2 = T1 */
439 
440  "movq 7*2*8(%1), %%mm4 \n\t" /* mm4 = x7 */
441  "pmulhw %%mm1, %%mm0 \n\t" /* mm0 = T1*x1 */
442 
443  "movq 16(%0), %%mm5 \n\t" /* mm5 = T3 */
444  "pmulhw %%mm4, %%mm2 \n\t" /* mm2 = T1*x7 */
445 
446  "movq 2*5*8(%1), %%mm6 \n\t" /* mm6 = x5 */
447  "movq %%mm5, %%mm7 \n\t" /* mm7 = T3-1 */
448 
449  "movq 3*8*2(%1), %%mm3 \n\t" /* mm3 = x3 */
450  "psubsw %%mm4, %%mm0 \n\t" /* mm0 = v17 */
451 
452  "movq 8(%0), %%mm4 \n\t" /* mm4 = T2 */
453  "pmulhw %%mm3, %%mm5 \n\t" /* mm5 = (T3-1)*x3 */
454 
455  "paddsw %%mm2, %%mm1 \n\t" /* mm1 = u17 */
456  "pmulhw %%mm6, %%mm7 \n\t" /* mm7 = (T3-1)*x5 */
457 
458  /* slot */
459 
460  "movq %%mm4, %%mm2 \n\t" /* mm2 = T2 */
461  "paddsw %%mm3, %%mm5 \n\t" /* mm5 = T3*x3 */
462 
463  "pmulhw 2*8*2(%1), %%mm4 \n\t" /* mm4 = T2*x2 */
464  "paddsw %%mm6, %%mm7 \n\t" /* mm7 = T3*x5 */
465 
466  "psubsw %%mm6, %%mm5 \n\t" /* mm5 = v35 */
467  "paddsw %%mm3, %%mm7 \n\t" /* mm7 = u35 */
468 
469  "movq 6*8*2(%1), %%mm3 \n\t" /* mm3 = x6 */
470  "movq %%mm0, %%mm6 \n\t" /* mm6 = v17 */
471 
472  "pmulhw %%mm3, %%mm2 \n\t" /* mm2 = T2*x6 */
473  "psubsw %%mm5, %%mm0 \n\t" /* mm0 = b3 */
474 
475  "psubsw %%mm3, %%mm4 \n\t" /* mm4 = v26 */
476  "paddsw %%mm6, %%mm5 \n\t" /* mm5 = v12 */
477 
478  "movq %%mm0, 3*8*2(%1)\n\t" /* save b3 in scratch0 */
479  "movq %%mm1, %%mm6 \n\t" /* mm6 = u17 */
480 
481  "paddsw 2*8*2(%1), %%mm2 \n\t" /* mm2 = u26 */
482  "paddsw %%mm7, %%mm6 \n\t" /* mm6 = b0 */
483 
484  "psubsw %%mm7, %%mm1 \n\t" /* mm1 = u12 */
485  "movq %%mm1, %%mm7 \n\t" /* mm7 = u12 */
486 
487  "movq 0*8(%1), %%mm3 \n\t" /* mm3 = x0 */
488  "paddsw %%mm5, %%mm1 \n\t" /* mm1 = u12+v12 */
489 
490  "movq 24(%0), %%mm0 \n\t" /* mm0 = C4/2 */
491  "psubsw %%mm5, %%mm7 \n\t" /* mm7 = u12-v12 */
492 
493  "movq %%mm6, 5*8*2(%1)\n\t" /* save b0 in scratch1 */
494  "pmulhw %%mm0, %%mm1 \n\t" /* mm1 = b1/2 */
495 
496  "movq %%mm4, %%mm6 \n\t" /* mm6 = v26 */
497  "pmulhw %%mm0, %%mm7 \n\t" /* mm7 = b2/2 */
498 
499  "movq 4*8*2(%1), %%mm5 \n\t" /* mm5 = x4 */
500  "movq %%mm3, %%mm0 \n\t" /* mm0 = x0 */
501 
502  "psubsw %%mm5, %%mm3 \n\t" /* mm3 = v04 */
503  "paddsw %%mm5, %%mm0 \n\t" /* mm0 = u04 */
504 
505  "paddsw %%mm3, %%mm4 \n\t" /* mm4 = a1 */
506  "movq %%mm0, %%mm5 \n\t" /* mm5 = u04 */
507 
508  "psubsw %%mm6, %%mm3 \n\t" /* mm3 = a2 */
509  "paddsw %%mm2, %%mm5 \n\t" /* mm5 = a0 */
510 
511  "paddsw %%mm1, %%mm1 \n\t" /* mm1 = b1 */
512  "psubsw %%mm2, %%mm0 \n\t" /* mm0 = a3 */
513 
514  "paddsw %%mm7, %%mm7 \n\t" /* mm7 = b2 */
515  "movq %%mm3, %%mm2 \n\t" /* mm2 = a2 */
516 
517  "movq %%mm4, %%mm6 \n\t" /* mm6 = a1 */
518  "paddsw %%mm7, %%mm3 \n\t" /* mm3 = a2+b2 */
519 
520  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm3\n\t" /* mm3 = y2 */
521  "paddsw %%mm1, %%mm4\n\t" /* mm4 = a1+b1 */
522 
523  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm4\n\t" /* mm4 = y1 */
524  "psubsw %%mm1, %%mm6 \n\t" /* mm6 = a1-b1 */
525 
526  "movq 5*8*2(%1), %%mm1 \n\t" /* mm1 = b0 */
527  "psubsw %%mm7, %%mm2 \n\t" /* mm2 = a2-b2 */
528 
529  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm6\n\t" /* mm6 = y6 */
530  "movq %%mm5, %%mm7 \n\t" /* mm7 = a0 */
531 
532  "movq %%mm4, 1*8*2(%1)\n\t" /* save y1 */
533  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm2\n\t" /* mm2 = y5 */
534 
535  "movq %%mm3, 2*8*2(%1)\n\t" /* save y2 */
536  "paddsw %%mm1, %%mm5 \n\t" /* mm5 = a0+b0 */
537 
538  "movq 3*8*2(%1), %%mm4 \n\t" /* mm4 = b3 */
539  "psubsw %%mm1, %%mm7 \n\t" /* mm7 = a0-b0 */
540 
541  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm5\n\t" /* mm5 = y0 */
542  "movq %%mm0, %%mm3 \n\t" /* mm3 = a3 */
543 
544  "movq %%mm2, 5*8*2(%1)\n\t" /* save y5 */
545  "psubsw %%mm4, %%mm3 \n\t" /* mm3 = a3-b3 */
546 
547  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm7\n\t" /* mm7 = y7 */
548  "paddsw %%mm0, %%mm4 \n\t" /* mm4 = a3+b3 */
549 
550  "movq %%mm5, 0*8*2(%1)\n\t" /* save y0 */
551  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm3\n\t" /* mm3 = y4 */
552 
553  "movq %%mm6, 6*8*2(%1)\n\t" /* save y6 */
554  "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm4\n\t" /* mm4 = y3 */
555 
556  "movq %%mm7, 7*8*2(%1)\n\t" /* save y7 */
557 
558  "movq %%mm3, 4*8*2(%1)\n\t" /* save y4 */
559 
560  "movq %%mm4, 3*8*2(%1)\n\t" /* save y3 */
561  :: "r" (t1_vector), "r" (col+offset)
562  );
563 
564 #undef T1
565 #undef T2
566 #undef T3
567 #undef C4
568 }
569 
570 
571 DECLARE_ALIGNED(8, static const int32_t, rounder0)[] =
572  rounder ((1 << (COL_SHIFT - 1)) - 0.5);
573 DECLARE_ALIGNED(8, static const int32_t, rounder4)[] = rounder (0);
574 DECLARE_ALIGNED(8, static const int32_t, rounder1)[] =
575  rounder (1.25683487303); /* C1*(C1/C4+C1+C7)/2 */
576 DECLARE_ALIGNED(8, static const int32_t, rounder7)[] =
577  rounder (-0.25); /* C1*(C7/C4+C7-C1)/2 */
578 DECLARE_ALIGNED(8, static const int32_t, rounder2)[] =
579  rounder (0.60355339059); /* C2 * (C6+C2)/2 */
580 DECLARE_ALIGNED(8, static const int32_t, rounder6)[] =
581  rounder (-0.25); /* C2 * (C6-C2)/2 */
582 DECLARE_ALIGNED(8, static const int32_t, rounder3)[] =
583  rounder (0.087788325588); /* C3*(-C3/C4+C3+C5)/2 */
584 DECLARE_ALIGNED(8, static const int32_t, rounder5)[] =
585  rounder (-0.441341716183); /* C3*(-C5/C4+C5-C3)/2 */
586 
587 #undef COL_SHIFT
588 #undef ROW_SHIFT
589 
590 #define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \
591 void idct (int16_t * const block) \
592 { \
593  DECLARE_ALIGNED(16, static const int16_t, table04)[] = \
594  table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \
595  DECLARE_ALIGNED(16, static const int16_t, table17)[] = \
596  table (31521, 29692, 26722, 22725, 17855, 12299, 6270); \
597  DECLARE_ALIGNED(16, static const int16_t, table26)[] = \
598  table (29692, 27969, 25172, 21407, 16819, 11585, 5906); \
599  DECLARE_ALIGNED(16, static const int16_t, table35)[] = \
600  table (26722, 25172, 22654, 19266, 15137, 10426, 5315); \
601  \
602  idct_row_head (block, 0*8, table04); \
603  idct_row (table04, rounder0); \
604  idct_row_mid (block, 0*8, 4*8, table04); \
605  idct_row (table04, rounder4); \
606  idct_row_mid (block, 4*8, 1*8, table17); \
607  idct_row (table17, rounder1); \
608  idct_row_mid (block, 1*8, 7*8, table17); \
609  idct_row (table17, rounder7); \
610  idct_row_mid (block, 7*8, 2*8, table26); \
611  idct_row (table26, rounder2); \
612  idct_row_mid (block, 2*8, 6*8, table26); \
613  idct_row (table26, rounder6); \
614  idct_row_mid (block, 6*8, 3*8, table35); \
615  idct_row (table35, rounder3); \
616  idct_row_mid (block, 3*8, 5*8, table35); \
617  idct_row (table35, rounder5); \
618  idct_row_tail (block, 5*8); \
619  \
620  idct_col (block, 0); \
621  idct_col (block, 4); \
622 }
623 
629