1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
|
/*
* XVID MPEG-4 VIDEO CODEC
* - SSE2 inverse discrete cosine transform -
*
* Copyright(C) 2003 Pascal Massimino <skal@planet-d.net>
*
* Conversion to gcc syntax with modifications
* by Alexander Strange <astrange@ithinksw.com>
*
* Originally from dct/x86_asm/fdct_sse2_skal.asm in Xvid.
*
* This file is part of FFmpeg.
*
* Vertical pass is an implementation of the scheme:
* Loeffler C., Ligtenberg A., and Moschytz C.S.:
* Practical Fast 1D DCT Algorithm with Eleven Multiplications,
* Proc. ICASSP 1989, 988-991.
*
* Horizontal pass is a double 4x4 vector/matrix multiplication,
* (see also Intel's Application Note 922:
* http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
* Copyright (C) 1999 Intel Corporation)
*
* More details at http://skal.planet-d.net/coding/dct.html
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFmpeg; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/dsputil.h"
#include "libavutil/x86_cpu.h"
#include "idct_xvid.h"
#include "dsputil_mmx.h"
/*!
* @file
* @brief SSE2 idct compatible with xvidmmx
*/
#define X8(x) x,x,x,x,x,x,x,x
#define ROW_SHIFT 11
#define COL_SHIFT 6
DECLARE_ASM_CONST(16, int16_t, tan1)[] = {X8(13036)}; // tan( pi/16)
DECLARE_ASM_CONST(16, int16_t, tan2)[] = {X8(27146)}; // tan(2pi/16) = sqrt(2)-1
DECLARE_ASM_CONST(16, int16_t, tan3)[] = {X8(43790)}; // tan(3pi/16)-1
DECLARE_ASM_CONST(16, int16_t, sqrt2)[]= {X8(23170)}; // 0.5/sqrt(2)
DECLARE_ASM_CONST(8, uint8_t, m127)[] = {X8(127)};
DECLARE_ASM_CONST(16, int16_t, iTab1)[] = {
0x4000, 0x539f, 0xc000, 0xac61, 0x4000, 0xdd5d, 0x4000, 0xdd5d,
0x4000, 0x22a3, 0x4000, 0x22a3, 0xc000, 0x539f, 0x4000, 0xac61,
0x3249, 0x11a8, 0x4b42, 0xee58, 0x11a8, 0x4b42, 0x11a8, 0xcdb7,
0x58c5, 0x4b42, 0xa73b, 0xcdb7, 0x3249, 0xa73b, 0x4b42, 0xa73b
};
DECLARE_ASM_CONST(16, int16_t, iTab2)[] = {
0x58c5, 0x73fc, 0xa73b, 0x8c04, 0x58c5, 0xcff5, 0x58c5, 0xcff5,
0x58c5, 0x300b, 0x58c5, 0x300b, 0xa73b, 0x73fc, 0x58c5, 0x8c04,
0x45bf, 0x187e, 0x6862, 0xe782, 0x187e, 0x6862, 0x187e, 0xba41,
0x7b21, 0x6862, 0x84df, 0xba41, 0x45bf, 0x84df, 0x6862, 0x84df
};
DECLARE_ASM_CONST(16, int16_t, iTab3)[] = {
0x539f, 0x6d41, 0xac61, 0x92bf, 0x539f, 0xd2bf, 0x539f, 0xd2bf,
0x539f, 0x2d41, 0x539f, 0x2d41, 0xac61, 0x6d41, 0x539f, 0x92bf,
0x41b3, 0x1712, 0x6254, 0xe8ee, 0x1712, 0x6254, 0x1712, 0xbe4d,
0x73fc, 0x6254, 0x8c04, 0xbe4d, 0x41b3, 0x8c04, 0x6254, 0x8c04
};
DECLARE_ASM_CONST(16, int16_t, iTab4)[] = {
0x4b42, 0x6254, 0xb4be, 0x9dac, 0x4b42, 0xd746, 0x4b42, 0xd746,
0x4b42, 0x28ba, 0x4b42, 0x28ba, 0xb4be, 0x6254, 0x4b42, 0x9dac,
0x3b21, 0x14c3, 0x587e, 0xeb3d, 0x14c3, 0x587e, 0x14c3, 0xc4df,
0x6862, 0x587e, 0x979e, 0xc4df, 0x3b21, 0x979e, 0x587e, 0x979e
};
DECLARE_ASM_CONST(16, int32_t, walkenIdctRounders)[] = {
65536, 65536, 65536, 65536,
3597, 3597, 3597, 3597,
2260, 2260, 2260, 2260,
1203, 1203, 1203, 1203,
120, 120, 120, 120,
512, 512, 512, 512
};
// Temporary storage before the column pass
#define ROW1 "%%xmm6"
#define ROW3 "%%xmm4"
#define ROW5 "%%xmm5"
#define ROW7 "%%xmm7"
#define CLEAR_ODD(r) "pxor "r","r" \n\t"
#define PUT_ODD(dst) "pshufhw $0x1B, %%xmm2, "dst" \n\t"
#if ARCH_X86_64
# define ROW0 "%%xmm8"
# define REG0 ROW0
# define ROW2 "%%xmm9"
# define REG2 ROW2
# define ROW4 "%%xmm10"
# define REG4 ROW4
# define ROW6 "%%xmm11"
# define REG6 ROW6
# define CLEAR_EVEN(r) CLEAR_ODD(r)
# define PUT_EVEN(dst) PUT_ODD(dst)
# define XMMS "%%xmm12"
# define MOV_32_ONLY "#"
# define SREG2 REG2
# define TAN3 "%%xmm13"
# define TAN1 "%%xmm14"
#else
# define ROW0 "(%0)"
# define REG0 "%%xmm4"
# define ROW2 "2*16(%0)"
# define REG2 "%%xmm4"
# define ROW4 "4*16(%0)"
# define REG4 "%%xmm6"
# define ROW6 "6*16(%0)"
# define REG6 "%%xmm6"
# define CLEAR_EVEN(r)
# define PUT_EVEN(dst) \
"pshufhw $0x1B, %%xmm2, %%xmm2 \n\t" \
"movdqa %%xmm2, "dst" \n\t"
# define XMMS "%%xmm2"
# define MOV_32_ONLY "movdqa "
# define SREG2 "%%xmm7"
# define TAN3 "%%xmm0"
# define TAN1 "%%xmm2"
#endif
#define ROUND(x) "paddd "MANGLE(x)
#define JZ(reg, to) \
"testl "reg","reg" \n\t" \
"jz "to" \n\t"
#define JNZ(reg, to) \
"testl "reg","reg" \n\t" \
"jnz "to" \n\t"
#define TEST_ONE_ROW(src, reg, clear) \
clear \
"movq "src", %%mm1 \n\t" \
"por 8+"src", %%mm1 \n\t" \
"paddusb %%mm0, %%mm1 \n\t" \
"pmovmskb %%mm1, "reg" \n\t"
#define TEST_TWO_ROWS(row1, row2, reg1, reg2, clear1, clear2) \
clear1 \
clear2 \
"movq "row1", %%mm1 \n\t" \
"por 8+"row1", %%mm1 \n\t" \
"movq "row2", %%mm2 \n\t" \
"por 8+"row2", %%mm2 \n\t" \
"paddusb %%mm0, %%mm1 \n\t" \
"paddusb %%mm0, %%mm2 \n\t" \
"pmovmskb %%mm1, "reg1" \n\t" \
"pmovmskb %%mm2, "reg2" \n\t"
///IDCT pass on rows.
#define iMTX_MULT(src, table, rounder, put) \
"movdqa "src", %%xmm3 \n\t" \
"movdqa %%xmm3, %%xmm0 \n\t" \
"pshufd $0x11, %%xmm3, %%xmm1 \n\t" /* 4602 */ \
"punpcklqdq %%xmm0, %%xmm0 \n\t" /* 0246 */ \
"pmaddwd "table", %%xmm0 \n\t" \
"pmaddwd 16+"table", %%xmm1 \n\t" \
"pshufd $0xBB, %%xmm3, %%xmm2 \n\t" /* 5713 */ \
"punpckhqdq %%xmm3, %%xmm3 \n\t" /* 1357 */ \
"pmaddwd 32+"table", %%xmm2 \n\t" \
"pmaddwd 48+"table", %%xmm3 \n\t" \
"paddd %%xmm1, %%xmm0 \n\t" \
"paddd %%xmm3, %%xmm2 \n\t" \
rounder", %%xmm0 \n\t" \
"movdqa %%xmm2, %%xmm3 \n\t" \
"paddd %%xmm0, %%xmm2 \n\t" \
"psubd %%xmm3, %%xmm0 \n\t" \
"psrad $11, %%xmm2 \n\t" \
"psrad $11, %%xmm0 \n\t" \
"packssdw %%xmm0, %%xmm2 \n\t" \
put \
"1: \n\t"
#define iLLM_HEAD \
"movdqa "MANGLE(tan3)", "TAN3" \n\t" \
"movdqa "MANGLE(tan1)", "TAN1" \n\t" \
///IDCT pass on columns.
#define iLLM_PASS(dct) \
"movdqa "TAN3", %%xmm1 \n\t" \
"movdqa "TAN1", %%xmm3 \n\t" \
"pmulhw %%xmm4, "TAN3" \n\t" \
"pmulhw %%xmm5, %%xmm1 \n\t" \
"paddsw %%xmm4, "TAN3" \n\t" \
"paddsw %%xmm5, %%xmm1 \n\t" \
"psubsw %%xmm5, "TAN3" \n\t" \
"paddsw %%xmm4, %%xmm1 \n\t" \
"pmulhw %%xmm7, %%xmm3 \n\t" \
"pmulhw %%xmm6, "TAN1" \n\t" \
"paddsw %%xmm6, %%xmm3 \n\t" \
"psubsw %%xmm7, "TAN1" \n\t" \
"movdqa %%xmm3, %%xmm7 \n\t" \
"movdqa "TAN1", %%xmm6 \n\t" \
"psubsw %%xmm1, %%xmm3 \n\t" \
"psubsw "TAN3", "TAN1" \n\t" \
"paddsw %%xmm7, %%xmm1 \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa %%xmm3, %%xmm6 \n\t" \
"psubsw "TAN3", %%xmm3 \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa "MANGLE(sqrt2)", %%xmm4 \n\t" \
"pmulhw %%xmm4, %%xmm3 \n\t" \
"pmulhw %%xmm4, "TAN3" \n\t" \
"paddsw "TAN3", "TAN3" \n\t" \
"paddsw %%xmm3, %%xmm3 \n\t" \
"movdqa "MANGLE(tan2)", %%xmm7 \n\t" \
MOV_32_ONLY ROW2", "REG2" \n\t" \
MOV_32_ONLY ROW6", "REG6" \n\t" \
"movdqa %%xmm7, %%xmm5 \n\t" \
"pmulhw "REG6", %%xmm7 \n\t" \
"pmulhw "REG2", %%xmm5 \n\t" \
"paddsw "REG2", %%xmm7 \n\t" \
"psubsw "REG6", %%xmm5 \n\t" \
MOV_32_ONLY ROW0", "REG0" \n\t" \
MOV_32_ONLY ROW4", "REG4" \n\t" \
MOV_32_ONLY" "TAN1", (%0) \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw "REG4", "REG0" \n\t" \
"paddsw "XMMS", "REG4" \n\t" \
"movdqa "REG4", "XMMS" \n\t" \
"psubsw %%xmm7, "REG4" \n\t" \
"paddsw "XMMS", %%xmm7 \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm5, "REG0" \n\t" \
"paddsw "XMMS", %%xmm5 \n\t" \
"movdqa %%xmm5, "XMMS" \n\t" \
"psubsw "TAN3", %%xmm5 \n\t" \
"paddsw "XMMS", "TAN3" \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm3, "REG0" \n\t" \
"paddsw "XMMS", %%xmm3 \n\t" \
MOV_32_ONLY" (%0), "TAN1" \n\t" \
"psraw $6, %%xmm5 \n\t" \
"psraw $6, "REG0" \n\t" \
"psraw $6, "TAN3" \n\t" \
"psraw $6, %%xmm3 \n\t" \
"movdqa "TAN3", 1*16("dct") \n\t" \
"movdqa %%xmm3, 2*16("dct") \n\t" \
"movdqa "REG0", 5*16("dct") \n\t" \
"movdqa %%xmm5, 6*16("dct") \n\t" \
"movdqa %%xmm7, %%xmm0 \n\t" \
"movdqa "REG4", %%xmm4 \n\t" \
"psubsw %%xmm1, %%xmm7 \n\t" \
"psubsw "TAN1", "REG4" \n\t" \
"paddsw %%xmm0, %%xmm1 \n\t" \
"paddsw %%xmm4, "TAN1" \n\t" \
"psraw $6, %%xmm1 \n\t" \
"psraw $6, %%xmm7 \n\t" \
"psraw $6, "TAN1" \n\t" \
"psraw $6, "REG4" \n\t" \
"movdqa %%xmm1, ("dct") \n\t" \
"movdqa "TAN1", 3*16("dct") \n\t" \
"movdqa "REG4", 4*16("dct") \n\t" \
"movdqa %%xmm7, 7*16("dct") \n\t"
///IDCT pass on columns, assuming rows 4-7 are zero.
#define iLLM_PASS_SPARSE(dct) \
"pmulhw %%xmm4, "TAN3" \n\t" \
"paddsw %%xmm4, "TAN3" \n\t" \
"movdqa %%xmm6, %%xmm3 \n\t" \
"pmulhw %%xmm6, "TAN1" \n\t" \
"movdqa %%xmm4, %%xmm1 \n\t" \
"psubsw %%xmm1, %%xmm3 \n\t" \
"paddsw %%xmm6, %%xmm1 \n\t" \
"movdqa "TAN1", %%xmm6 \n\t" \
"psubsw "TAN3", "TAN1" \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa %%xmm3, %%xmm6 \n\t" \
"psubsw "TAN3", %%xmm3 \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa "MANGLE(sqrt2)", %%xmm4 \n\t" \
"pmulhw %%xmm4, %%xmm3 \n\t" \
"pmulhw %%xmm4, "TAN3" \n\t" \
"paddsw "TAN3", "TAN3" \n\t" \
"paddsw %%xmm3, %%xmm3 \n\t" \
"movdqa "MANGLE(tan2)", %%xmm5 \n\t" \
MOV_32_ONLY ROW2", "SREG2" \n\t" \
"pmulhw "SREG2", %%xmm5 \n\t" \
MOV_32_ONLY ROW0", "REG0" \n\t" \
"movdqa "REG0", %%xmm6 \n\t" \
"psubsw "SREG2", %%xmm6 \n\t" \
"paddsw "REG0", "SREG2" \n\t" \
MOV_32_ONLY" "TAN1", (%0) \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm5, "REG0" \n\t" \
"paddsw "XMMS", %%xmm5 \n\t" \
"movdqa %%xmm5, "XMMS" \n\t" \
"psubsw "TAN3", %%xmm5 \n\t" \
"paddsw "XMMS", "TAN3" \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm3, "REG0" \n\t" \
"paddsw "XMMS", %%xmm3 \n\t" \
MOV_32_ONLY" (%0), "TAN1" \n\t" \
"psraw $6, %%xmm5 \n\t" \
"psraw $6, "REG0" \n\t" \
"psraw $6, "TAN3" \n\t" \
"psraw $6, %%xmm3 \n\t" \
"movdqa "TAN3", 1*16("dct") \n\t" \
"movdqa %%xmm3, 2*16("dct") \n\t" \
"movdqa "REG0", 5*16("dct") \n\t" \
"movdqa %%xmm5, 6*16("dct") \n\t" \
"movdqa "SREG2", %%xmm0 \n\t" \
"movdqa %%xmm6, %%xmm4 \n\t" \
"psubsw %%xmm1, "SREG2" \n\t" \
"psubsw "TAN1", %%xmm6 \n\t" \
"paddsw %%xmm0, %%xmm1 \n\t" \
"paddsw %%xmm4, "TAN1" \n\t" \
"psraw $6, %%xmm1 \n\t" \
"psraw $6, "SREG2" \n\t" \
"psraw $6, "TAN1" \n\t" \
"psraw $6, %%xmm6 \n\t" \
"movdqa %%xmm1, ("dct") \n\t" \
"movdqa "TAN1", 3*16("dct") \n\t" \
"movdqa %%xmm6, 4*16("dct") \n\t" \
"movdqa "SREG2", 7*16("dct") \n\t"
inline void ff_idct_xvid_sse2(short *block)
{
__asm__ volatile(
"movq "MANGLE(m127)", %%mm0 \n\t"
iMTX_MULT("(%0)", MANGLE(iTab1), ROUND(walkenIdctRounders), PUT_EVEN(ROW0))
iMTX_MULT("1*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+1*16), PUT_ODD(ROW1))
iMTX_MULT("2*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+2*16), PUT_EVEN(ROW2))
TEST_TWO_ROWS("3*16(%0)", "4*16(%0)", "%%eax", "%%ecx", CLEAR_ODD(ROW3), CLEAR_EVEN(ROW4))
JZ("%%eax", "1f")
iMTX_MULT("3*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+3*16), PUT_ODD(ROW3))
TEST_TWO_ROWS("5*16(%0)", "6*16(%0)", "%%eax", "%%edx", CLEAR_ODD(ROW5), CLEAR_EVEN(ROW6))
TEST_ONE_ROW("7*16(%0)", "%%esi", CLEAR_ODD(ROW7))
iLLM_HEAD
ASMALIGN(4)
JNZ("%%ecx", "2f")
JNZ("%%eax", "3f")
JNZ("%%edx", "4f")
JNZ("%%esi", "5f")
iLLM_PASS_SPARSE("%0")
"jmp 6f \n\t"
"2: \n\t"
iMTX_MULT("4*16(%0)", MANGLE(iTab1), "#", PUT_EVEN(ROW4))
"3: \n\t"
iMTX_MULT("5*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+4*16), PUT_ODD(ROW5))
JZ("%%edx", "1f")
"4: \n\t"
iMTX_MULT("6*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+5*16), PUT_EVEN(ROW6))
JZ("%%esi", "1f")
"5: \n\t"
iMTX_MULT("7*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+5*16), PUT_ODD(ROW7))
#if !ARCH_X86_64
iLLM_HEAD
#endif
iLLM_PASS("%0")
"6: \n\t"
: "+r"(block)
:
: "%eax", "%ecx", "%edx", "%esi", "memory"
XMM_CLOBBERS(, "%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" ,
"%xmm4" , "%xmm5" , "%xmm6" , "%xmm7" ,
"%xmm8" , "%xmm9" , "%xmm10", "%xmm11",
"%xmm12", "%xmm13", "%xmm14")
);
}
void ff_idct_xvid_sse2_put(uint8_t *dest, int line_size, short *block)
{
ff_idct_xvid_sse2(block);
ff_put_pixels_clamped_mmx(block, dest, line_size);
}
void ff_idct_xvid_sse2_add(uint8_t *dest, int line_size, short *block)
{
ff_idct_xvid_sse2(block);
ff_add_pixels_clamped_mmx(block, dest, line_size);
}
|
