aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/x86/vp3dsp.asm
blob: 328f94ca6067283f89ea86b17034e0942071a5e6 (plain) (blame)
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
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
;******************************************************************************
;* MMX/SSE2-optimized functions for the VP3 decoder
;* Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
;*
;* This file is part of FFmpeg.
;*
;* 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 "x86inc.asm"
%include "x86util.asm"

; MMX-optimized functions cribbed from the original VP3 source code.

SECTION_RODATA

vp3_idct_data: times 8 dw 64277
               times 8 dw 60547
               times 8 dw 54491
               times 8 dw 46341
               times 8 dw 36410
               times 8 dw 25080
               times 8 dw 12785

cextern pb_1
cextern pb_3
cextern pb_7
cextern pb_1F
cextern pb_81

cextern pw_8

cextern put_signed_pixels_clamped_mmx
cextern add_pixels_clamped_mmx

SECTION .text

; this is off by one or two for some cases when filter_limit is greater than 63
; in:  p0 in mm6, p1 in mm4, p2 in mm2, p3 in mm1
; out: p1 in mm4, p2 in mm3
%macro VP3_LOOP_FILTER 0
    movq          m7, m6
    pand          m6, [pb_7]    ; p0&7
    psrlw         m7, 3
    pand          m7, [pb_1F]   ; p0>>3
    movq          m3, m2        ; p2
    pxor          m2, m4
    pand          m2, [pb_1]    ; (p2^p1)&1
    movq          m5, m2
    paddb         m2, m2
    paddb         m2, m5        ; 3*(p2^p1)&1
    paddb         m2, m6        ; extra bits lost in shifts
    pcmpeqb       m0, m0
    pxor          m1, m0        ; 255 - p3
    pavgb         m1, m2        ; (256 - p3 + extrabits) >> 1
    pxor          m0, m4        ; 255 - p1
    pavgb         m0, m3        ; (256 + p2-p1) >> 1
    paddb         m1, [pb_3]
    pavgb         m1, m0        ; 128+2+(   p2-p1  - p3) >> 2
    pavgb         m1, m0        ; 128+1+(3*(p2-p1) - p3) >> 3
    paddusb       m7, m1        ; d+128+1
    movq          m6, [pb_81]
    psubusb       m6, m7
    psubusb       m7, [pb_81]

    movq          m5, [r2+516]  ; flim
    pminub        m6, m5
    pminub        m7, m5
    movq          m0, m6
    movq          m1, m7
    paddb         m6, m6
    paddb         m7, m7
    pminub        m6, m5
    pminub        m7, m5
    psubb         m6, m0
    psubb         m7, m1
    paddusb       m4, m7
    psubusb       m4, m6
    psubusb       m3, m7
    paddusb       m3, m6
%endmacro

%macro STORE_4_WORDS 1
    movd         r2d, %1
    mov  [r0     -1], r2w
    psrlq         %1, 32
    shr           r2, 16
    mov  [r0+r1  -1], r2w
    movd         r2d, %1
    mov  [r0+r1*2-1], r2w
    shr           r2, 16
    mov  [r0+r3  -1], r2w
%endmacro

INIT_MMX
cglobal vp3_v_loop_filter_mmx2, 3, 4
%ifdef ARCH_X86_64
    movsxd        r1, r1d
%endif
    mov           r3, r1
    neg           r1
    movq          m6, [r0+r1*2]
    movq          m4, [r0+r1  ]
    movq          m2, [r0     ]
    movq          m1, [r0+r3  ]

    VP3_LOOP_FILTER

    movq     [r0+r1], m4
    movq     [r0   ], m3
    RET

cglobal vp3_h_loop_filter_mmx2, 3, 4
%ifdef ARCH_X86_64
    movsxd        r1, r1d
%endif
    lea           r3, [r1*3]

    movd          m6, [r0     -2]
    movd          m4, [r0+r1  -2]
    movd          m2, [r0+r1*2-2]
    movd          m1, [r0+r3  -2]
    lea           r0, [r0+r1*4  ]
    punpcklbw     m6, [r0     -2]
    punpcklbw     m4, [r0+r1  -2]
    punpcklbw     m2, [r0+r1*2-2]
    punpcklbw     m1, [r0+r3  -2]
    sub           r0, r3
    sub           r0, r1

    TRANSPOSE4x4B  6, 4, 2, 1, 0
    VP3_LOOP_FILTER
    SBUTTERFLY    bw, 4, 3, 5

    STORE_4_WORDS m4
    lea           r0, [r0+r1*4  ]
    STORE_4_WORDS m3
    RET

; from original comments: The Macro does IDct on 4 1-D Dcts
%macro BeginIDCT 0
    movq          m2, I(3)
    movq          m6, C(3)
    movq          m4, m2
    movq          m7, J(5)
    pmulhw        m4, m6        ; r4 = c3*i3 - i3
    movq          m1, C(5)
    pmulhw        m6, m7        ; r6 = c3*i5 - i5
    movq          m5, m1
    pmulhw        m1, m2        ; r1 = c5*i3 - i3
    movq          m3, I(1)
    pmulhw        m5, m7        ; r5 = c5*i5 - i5
    movq          m0, C(1)
    paddw         m4, m2        ; r4 = c3*i3
    paddw         m6, m7        ; r6 = c3*i5
    paddw         m2, m1        ; r2 = c5*i3
    movq          m1, J(7)
    paddw         m7, m5        ; r7 = c5*i5
    movq          m5, m0        ; r5 = c1
    pmulhw        m0, m3        ; r0 = c1*i1 - i1
    paddsw        m4, m7        ; r4 = C = c3*i3 + c5*i5
    pmulhw        m5, m1        ; r5 = c1*i7 - i7
    movq          m7, C(7)
    psubsw        m6, m2        ; r6 = D = c3*i5 - c5*i3
    paddw         m0, m3        ; r0 = c1*i1
    pmulhw        m3, m7        ; r3 = c7*i1
    movq          m2, I(2)
    pmulhw        m7, m1        ; r7 = c7*i7
    paddw         m5, m1        ; r5 = c1*i7
    movq          m1, m2        ; r1 = i2
    pmulhw        m2, C(2)      ; r2 = c2*i2 - i2
    psubsw        m3, m5        ; r3 = B = c7*i1 - c1*i7
    movq          m5, J(6)
    paddsw        m0, m7        ; r0 = A = c1*i1 + c7*i7
    movq          m7, m5        ; r7 = i6
    psubsw        m0, m4        ; r0 = A - C
    pmulhw        m5, C(2)      ; r5 = c2*i6 - i6
    paddw         m2, m1        ; r2 = c2*i2
    pmulhw        m1, C(6)      ; r1 = c6*i2
    paddsw        m4, m4        ; r4 = C + C
    paddsw        m4, m0        ; r4 = C. = A + C
    psubsw        m3, m6        ; r3 = B - D
    paddw         m5, m7        ; r5 = c2*i6
    paddsw        m6, m6        ; r6 = D + D
    pmulhw        m7, C(6)      ; r7 = c6*i6
    paddsw        m6, m3        ; r6 = D. = B + D
    movq        I(1), m4        ; save C. at I(1)
    psubsw        m1, m5        ; r1 = H = c6*i2 - c2*i6
    movq          m4, C(4)
    movq          m5, m3        ; r5 = B - D
    pmulhw        m3, m4        ; r3 = (c4 - 1) * (B - D)
    paddsw        m7, m2        ; r3 = (c4 - 1) * (B - D)
    movq        I(2), m6        ; save D. at I(2)
    movq          m2, m0        ; r2 = A - C
    movq          m6, I(0)
    pmulhw        m0, m4        ; r0 = (c4 - 1) * (A - C)
    paddw         m5, m3        ; r5 = B. = c4 * (B - D)
    movq          m3, J(4)
    psubsw        m5, m1        ; r5 = B.. = B. - H
    paddw         m2, m0        ; r0 = A. = c4 * (A - C)
    psubsw        m6, m3        ; r6 = i0 - i4
    movq          m0, m6
    pmulhw        m6, m4        ; r6 = (c4 - 1) * (i0 - i4)
    paddsw        m3, m3        ; r3 = i4 + i4
    paddsw        m1, m1        ; r1 = H + H
    paddsw        m3, m0        ; r3 = i0 + i4
    paddsw        m1, m5        ; r1 = H. = B + H
    pmulhw        m4, m3        ; r4 = (c4 - 1) * (i0 + i4)
    paddsw        m6, m0        ; r6 = F = c4 * (i0 - i4)
    psubsw        m6, m2        ; r6 = F. = F - A.
    paddsw        m2, m2        ; r2 = A. + A.
    movq          m0, I(1)      ; r0 = C.
    paddsw        m2, m6        ; r2 = A.. = F + A.
    paddw         m4, m3        ; r4 = E = c4 * (i0 + i4)
    psubsw        m2, m1        ; r2 = R2 = A.. - H.
%endmacro

; RowIDCT gets ready to transpose
%macro RowIDCT 0
    BeginIDCT
    movq          m3, I(2)      ; r3 = D.
    psubsw        m4, m7        ; r4 = E. = E - G
    paddsw        m1, m1        ; r1 = H. + H.
    paddsw        m7, m7        ; r7 = G + G
    paddsw        m1, m2        ; r1 = R1 = A.. + H.
    paddsw        m7, m4        ; r1 = R1 = A.. + H.
    psubsw        m4, m3        ; r4 = R4 = E. - D.
    paddsw        m3, m3
    psubsw        m6, m5        ; r6 = R6 = F. - B..
    paddsw        m5, m5
    paddsw        m3, m4        ; r3 = R3 = E. + D.
    paddsw        m5, m6        ; r5 = R5 = F. + B..
    psubsw        m7, m0        ; r7 = R7 = G. - C.
    paddsw        m0, m0
    movq        I(1), m1        ; save R1
    paddsw        m0, m7        ; r0 = R0 = G. + C.
%endmacro

; Column IDCT normalizes and stores final results
%macro ColumnIDCT 0
    BeginIDCT
    paddsw        m2, OC_8      ; adjust R2 (and R1) for shift
    paddsw        m1, m1        ; r1 = H. + H.
    paddsw        m1, m2        ; r1 = R1 = A.. + H.
    psraw         m2, 4         ; r2 = NR2
    psubsw        m4, m7        ; r4 = E. = E - G
    psraw         m1, 4         ; r1 = NR2
    movq          m3, I(2)      ; r3 = D.
    paddsw        m7, m7        ; r7 = G + G
    movq        I(2), m2        ; store NR2 at I2
    paddsw        m7, m4        ; r7 = G. = E + G
    movq        I(1), m1        ; store NR1 at I1
    psubsw        m4, m3        ; r4 = R4 = E. - D.
    paddsw        m4, OC_8      ; adjust R4 (and R3) for shift
    paddsw        m3, m3        ; r3 = D. + D.
    paddsw        m3, m4        ; r3 = R3 = E. + D.
    psraw         m4, 4         ; r4 = NR4
    psubsw        m6, m5        ; r6 = R6 = F. - B..
    psraw         m3, 4         ; r3 = NR3
    paddsw        m6, OC_8      ; adjust R6 (and R5) for shift
    paddsw        m5, m5        ; r5 = B.. + B..
    paddsw        m5, m6        ; r5 = R5 = F. + B..
    psraw         m6, 4         ; r6 = NR6
    movq        J(4), m4        ; store NR4 at J4
    psraw         m5, 4         ; r5 = NR5
    movq        I(3), m3        ; store NR3 at I3
    psubsw        m7, m0        ; r7 = R7 = G. - C.
    paddsw        m7, OC_8      ; adjust R7 (and R0) for shift
    paddsw        m0, m0        ; r0 = C. + C.
    paddsw        m0, m7        ; r0 = R0 = G. + C.
    psraw         m7, 4         ; r7 = NR7
    movq        J(6), m6        ; store NR6 at J6
    psraw         m0, 4         ; r0 = NR0
    movq        J(5), m5        ; store NR5 at J5
    movq        J(7), m7        ; store NR7 at J7
    movq        I(0), m0        ; store NR0 at I0
%endmacro

; Following macro does two 4x4 transposes in place.
;
; At entry (we assume):
;
;   r0 = a3 a2 a1 a0
;   I(1) = b3 b2 b1 b0
;   r2 = c3 c2 c1 c0
;   r3 = d3 d2 d1 d0
;
;   r4 = e3 e2 e1 e0
;   r5 = f3 f2 f1 f0
;   r6 = g3 g2 g1 g0
;   r7 = h3 h2 h1 h0
;
; At exit, we have:
;
;   I(0) = d0 c0 b0 a0
;   I(1) = d1 c1 b1 a1
;   I(2) = d2 c2 b2 a2
;   I(3) = d3 c3 b3 a3
;
;   J(4) = h0 g0 f0 e0
;   J(5) = h1 g1 f1 e1
;   J(6) = h2 g2 f2 e2
;   J(7) = h3 g3 f3 e3
;
;  I(0) I(1) I(2) I(3)  is the transpose of r0 I(1) r2 r3.
;  J(4) J(5) J(6) J(7)  is the transpose of r4 r5 r6 r7.
;
;  Since r1 is free at entry, we calculate the Js first.
%macro Transpose 0
    movq          m1, m4        ; r1 = e3 e2 e1 e0
    punpcklwd     m4, m5        ; r4 = f1 e1 f0 e0
    movq        I(0), m0        ; save a3 a2 a1 a0
    punpckhwd     m1, m5        ; r1 = f3 e3 f2 e2
    movq          m0, m6        ; r0 = g3 g2 g1 g0
    punpcklwd     m6, m7        ; r6 = h1 g1 h0 g0
    movq          m5, m4        ; r5 = f1 e1 f0 e0
    punpckldq     m4, m6        ; r4 = h0 g0 f0 e0 = R4
    punpckhdq     m5, m6        ; r5 = h1 g1 f1 e1 = R5
    movq          m6, m1        ; r6 = f3 e3 f2 e2
    movq        J(4), m4
    punpckhwd     m0, m7        ; r0 = h3 g3 h2 g2
    movq        J(5), m5
    punpckhdq     m6, m0        ; r6 = h3 g3 f3 e3 = R7
    movq          m4, I(0)      ; r4 = a3 a2 a1 a0
    punpckldq     m1, m0        ; r1 = h2 g2 f2 e2 = R6
    movq          m5, I(1)      ; r5 = b3 b2 b1 b0
    movq          m0, m4        ; r0 = a3 a2 a1 a0
    movq        J(7), m6
    punpcklwd     m0, m5        ; r0 = b1 a1 b0 a0
    movq        J(6), m1
    punpckhwd     m4, m5        ; r4 = b3 a3 b2 a2
    movq          m5, m2        ; r5 = c3 c2 c1 c0
    punpcklwd     m2, m3        ; r2 = d1 c1 d0 c0
    movq          m1, m0        ; r1 = b1 a1 b0 a0
    punpckldq     m0, m2        ; r0 = d0 c0 b0 a0 = R0
    punpckhdq     m1, m2        ; r1 = d1 c1 b1 a1 = R1
    movq          m2, m4        ; r2 = b3 a3 b2 a2
    movq        I(0), m0
    punpckhwd     m5, m3        ; r5 = d3 c3 d2 c2
    movq        I(1), m1
    punpckhdq     m4, m5        ; r4 = d3 c3 b3 a3 = R3
    punpckldq     m2, m5        ; r2 = d2 c2 b2 a2 = R2
    movq        I(3), m4
    movq        I(2), m2
%endmacro

%macro VP3_IDCT_mmx 1
    ; eax = quantized input
    ; ebx = dequantizer matrix
    ; ecx = IDCT constants
    ;  M(I) = ecx + MaskOffset(0) + I * 8
    ;  C(I) = ecx + CosineOffset(32) + (I-1) * 8
    ; edx = output
    ; r0..r7 = mm0..mm7
%define OC_8 [pw_8]
%define C(x) [vp3_idct_data+16*(x-1)]

    ; at this point, function has completed dequantization + dezigzag +
    ; partial transposition; now do the idct itself
%define I(x) [%1+16* x     ]
%define J(x) [%1+16*(x-4)+8]
    RowIDCT
    Transpose

%define I(x) [%1+16* x   +64]
%define J(x) [%1+16*(x-4)+72]
    RowIDCT
    Transpose

%define I(x) [%1+16*x]
%define J(x) [%1+16*x]
    ColumnIDCT

%define I(x) [%1+16*x+8]
%define J(x) [%1+16*x+8]
    ColumnIDCT
%endmacro

%macro VP3_1D_IDCT_SSE2 0
    movdqa        m2, I(3)      ; xmm2 = i3
    movdqa        m6, C(3)      ; xmm6 = c3
    movdqa        m4, m2        ; xmm4 = i3
    movdqa        m7, I(5)      ; xmm7 = i5
    pmulhw        m4, m6        ; xmm4 = c3 * i3 - i3
    movdqa        m1, C(5)      ; xmm1 = c5
    pmulhw        m6, m7        ; xmm6 = c3 * i5 - i5
    movdqa        m5, m1        ; xmm5 = c5
    pmulhw        m1, m2        ; xmm1 = c5 * i3 - i3
    movdqa        m3, I(1)      ; xmm3 = i1
    pmulhw        m5, m7        ; xmm5 = c5 * i5 - i5
    movdqa        m0, C(1)      ; xmm0 = c1
    paddw         m4, m2        ; xmm4 = c3 * i3
    paddw         m6, m7        ; xmm6 = c3 * i5
    paddw         m2, m1        ; xmm2 = c5 * i3
    movdqa        m1, I(7)      ; xmm1 = i7
    paddw         m7, m5        ; xmm7 = c5 * i5
    movdqa        m5, m0        ; xmm5 = c1
    pmulhw        m0, m3        ; xmm0 = c1 * i1 - i1
    paddsw        m4, m7        ; xmm4 = c3 * i3 + c5 * i5 = C
    pmulhw        m5, m1        ; xmm5 = c1 * i7 - i7
    movdqa        m7, C(7)      ; xmm7 = c7
    psubsw        m6, m2        ; xmm6 = c3 * i5 - c5 * i3 = D
    paddw         m0, m3        ; xmm0 = c1 * i1
    pmulhw        m3, m7        ; xmm3 = c7 * i1
    movdqa        m2, I(2)      ; xmm2 = i2
    pmulhw        m7, m1        ; xmm7 = c7 * i7
    paddw         m5, m1        ; xmm5 = c1 * i7
    movdqa        m1, m2        ; xmm1 = i2
    pmulhw        m2, C(2)      ; xmm2 = i2 * c2 -i2
    psubsw        m3, m5        ; xmm3 = c7 * i1 - c1 * i7 = B
    movdqa        m5, I(6)      ; xmm5 = i6
    paddsw        m0, m7        ; xmm0 = c1 * i1 + c7 * i7 = A
    movdqa        m7, m5        ; xmm7 = i6
    psubsw        m0, m4        ; xmm0 = A - C
    pmulhw        m5, C(2)      ; xmm5 = c2 * i6 - i6
    paddw         m2, m1        ; xmm2 = i2 * c2
    pmulhw        m1, C(6)      ; xmm1 = c6 * i2
    paddsw        m4, m4        ; xmm4 = C + C
    paddsw        m4, m0        ; xmm4 = A + C = C.
    psubsw        m3, m6        ; xmm3 = B - D
    paddw         m5, m7        ; xmm5 = c2 * i6
    paddsw        m6, m6        ; xmm6 = D + D
    pmulhw        m7, C(6)      ; xmm7 = c6 * i6
    paddsw        m6, m3        ; xmm6 = B + D = D.
    movdqa      I(1), m4        ; Save C. at I(1)
    psubsw        m1, m5        ; xmm1 = c6 * i2 - c2 * i6 = H
    movdqa        m4, C(4)      ; xmm4 = C4
    movdqa        m5, m3        ; xmm5 = B - D
    pmulhw        m3, m4        ; xmm3 = ( c4 -1 ) * ( B - D )
    paddsw        m7, m2        ; xmm7 = c2 * i2 + c6 * i6 = G
    movdqa      I(2), m6        ; save D. at I(2)
    movdqa        m2, m0        ; xmm2 = A - C
    movdqa        m6, I(0)      ; xmm6 = i0
    pmulhw        m0, m4        ; xmm0 = ( c4 - 1 ) * ( A - C ) = A.
    paddw         m5, m3        ; xmm5 = c4 * ( B - D ) = B.
    movdqa        m3, I(4)      ; xmm3 = i4
    psubsw        m5, m1        ; xmm5 = B. - H = B..
    paddw         m2, m0        ; xmm2 = c4 * ( A - C) = A.
    psubsw        m6, m3        ; xmm6 = i0 - i4
    movdqa        m0, m6        ; xmm0 = i0 - i4
    pmulhw        m6, m4        ; xmm6 = (c4 - 1) * (i0 - i4) = F
    paddsw        m3, m3        ; xmm3 = i4 + i4
    paddsw        m1, m1        ; xmm1 = H + H
    paddsw        m3, m0        ; xmm3 = i0 + i4
    paddsw        m1, m5        ; xmm1 = B. + H = H.
    pmulhw        m4, m3        ; xmm4 = ( c4 - 1 ) * ( i0 + i4 )
    paddw         m6, m0        ; xmm6 = c4 * ( i0 - i4 )
    psubsw        m6, m2        ; xmm6 = F - A. = F.
    paddsw        m2, m2        ; xmm2 = A. + A.
    movdqa        m0, I(1)      ; Load        C. from I(1)
    paddsw        m2, m6        ; xmm2 = F + A. = A..
    paddw         m4, m3        ; xmm4 = c4 * ( i0 + i4 ) = 3
    psubsw        m2, m1        ; xmm2 = A.. - H. = R2
    ADD(m2)                     ; Adjust R2 and R1 before shifting
    paddsw        m1, m1        ; xmm1 = H. + H.
    paddsw        m1, m2        ; xmm1 = A.. + H. = R1
    SHIFT(m2)                   ; xmm2 = op2
    psubsw        m4, m7        ; xmm4 = E - G = E.
    SHIFT(m1)                   ; xmm1 = op1
    movdqa        m3, I(2)      ; Load D. from I(2)
    paddsw        m7, m7        ; xmm7 = G + G
    paddsw        m7, m4        ; xmm7 = E + G = G.
    psubsw        m4, m3        ; xmm4 = E. - D. = R4
    ADD(m4)                     ; Adjust R4 and R3 before shifting
    paddsw        m3, m3        ; xmm3 = D. + D.
    paddsw        m3, m4        ; xmm3 = E. + D. = R3
    SHIFT(m4)                   ; xmm4 = op4
    psubsw        m6, m5        ; xmm6 = F. - B..= R6
    SHIFT(m3)                   ; xmm3 = op3
    ADD(m6)                     ; Adjust R6 and R5 before shifting
    paddsw        m5, m5        ; xmm5 = B.. + B..
    paddsw        m5, m6        ; xmm5 = F. + B.. = R5
    SHIFT(m6)                   ; xmm6 = op6
    SHIFT(m5)                   ; xmm5 = op5
    psubsw        m7, m0        ; xmm7 = G. - C. = R7
    ADD(m7)                     ; Adjust R7 and R0 before shifting
    paddsw        m0, m0        ; xmm0 = C. + C.
    paddsw        m0, m7        ; xmm0 = G. + C.
    SHIFT(m7)                   ; xmm7 = op7
    SHIFT(m0)                   ; xmm0 = op0
%endmacro

%macro PUT_BLOCK 8
    movdqa      O(0), m%1
    movdqa      O(1), m%2
    movdqa      O(2), m%3
    movdqa      O(3), m%4
    movdqa      O(4), m%5
    movdqa      O(5), m%6
    movdqa      O(6), m%7
    movdqa      O(7), m%8
%endmacro

%macro VP3_IDCT_sse2 1
%define I(x) [%1+16*x]
%define O(x) [%1+16*x]
%define C(x) [vp3_idct_data+16*(x-1)]
%define SHIFT(x)
%define ADD(x)
        VP3_1D_IDCT_SSE2
%ifdef ARCH_X86_64
        TRANSPOSE8x8W 0, 1, 2, 3, 4, 5, 6, 7, 8
%else
        TRANSPOSE8x8W 0, 1, 2, 3, 4, 5, 6, 7, [%1], [%1+16]
%endif
        PUT_BLOCK 0, 1, 2, 3, 4, 5, 6, 7

%define SHIFT(x) psraw  x, 4
%define ADD(x)   paddsw x, [pw_8]
        VP3_1D_IDCT_SSE2
        PUT_BLOCK 0, 1, 2, 3, 4, 5, 6, 7
%endmacro

%macro vp3_idct_funcs 3
cglobal vp3_idct_%1, 1, 1, %2
    VP3_IDCT_%1   r0
    RET

cglobal vp3_idct_put_%1, 3, %3, %2
    VP3_IDCT_%1   r2
%ifdef ARCH_X86_64
    mov           r3, r2
    mov           r2, r1
    mov           r1, r0
    mov           r0, r3
%else
    mov          r0m, r2
    mov          r1m, r0
    mov          r2m, r1
%endif
%ifdef WIN64
    call put_signed_pixels_clamped_mmx
    RET
%else
    jmp put_signed_pixels_clamped_mmx
%endif

cglobal vp3_idct_add_%1, 3, %3, %2
    VP3_IDCT_%1   r2
%ifdef ARCH_X86_64
    mov           r3, r2
    mov           r2, r1
    mov           r1, r0
    mov           r0, r3
%else
    mov          r0m, r2
    mov          r1m, r0
    mov          r2m, r1
%endif
%ifdef WIN64
    call add_pixels_clamped_mmx
    RET
%else
    jmp add_pixels_clamped_mmx
%endif
%endmacro

%ifdef ARCH_X86_64
%define REGS 4
%else
%define REGS 3
%endif
INIT_MMX
vp3_idct_funcs mmx,  0, REGS
INIT_XMM
vp3_idct_funcs sse2, 9, REGS
%undef REGS

%macro DC_ADD 0
    movq          m2, [r0     ]
    movq          m3, [r0+r1  ]
    paddusb       m2, m0
    movq          m4, [r0+r1*2]
    paddusb       m3, m0
    movq          m5, [r0+r3  ]
    paddusb       m4, m0
    paddusb       m5, m0
    psubusb       m2, m1
    psubusb       m3, m1
    movq   [r0     ], m2
    psubusb       m4, m1
    movq   [r0+r1  ], m3
    psubusb       m5, m1
    movq   [r0+r1*2], m4
    movq   [r0+r3  ], m5
%endmacro

INIT_MMX
cglobal vp3_idct_dc_add_mmx2, 3, 4
%ifdef ARCH_X86_64
    movsxd        r1, r1d
%endif
    lea           r3, [r1*3]
    movsx         r2, word [r2]
    add           r2, 15
    sar           r2, 5
    movd          m0, r2d
    pshufw        m0, m0, 0x0
    pxor          m1, m1
    psubw         m1, m0
    packuswb      m0, m0
    packuswb      m1, m1
    DC_ADD
    lea           r0, [r0+r1*4]
    DC_ADD
    RET