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
|
;
; jidctflt.asm - floating-point IDCT (SSE & MMX)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2016, D. R. Commander.
;
; Based on the x86 SIMD extension for IJG JPEG library
; Copyright (C) 1999-2006, MIYASAKA Masaru.
; For conditions of distribution and use, see copyright notice in jsimdext.inc
;
; This file should be assembled with NASM (Netwide Assembler),
; can *not* be assembled with Microsoft's MASM or any compatible
; assembler (including Borland's Turbo Assembler).
; NASM is available from http://nasm.sourceforge.net/ or
; http://sourceforge.net/project/showfiles.php?group_id=6208
;
; This file contains a floating-point implementation of the inverse DCT
; (Discrete Cosine Transform). The following code is based directly on
; the IJG's original jidctflt.c; see the jidctflt.c for more details.
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
%macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5)
shufps %1, %2, 0x44
%endmacro
%macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7)
shufps %1, %2, 0xEE
%endmacro
; --------------------------------------------------------------------------
SECTION SEG_CONST
alignz 32
GLOBAL_DATA(jconst_idct_float_sse)
EXTN(jconst_idct_float_sse):
PD_1_414 times 4 dd 1.414213562373095048801689
PD_1_847 times 4 dd 1.847759065022573512256366
PD_1_082 times 4 dd 1.082392200292393968799446
PD_M2_613 times 4 dd -2.613125929752753055713286
PD_0_125 times 4 dd 0.125 ; 1/8
PB_CENTERJSAMP times 8 db CENTERJSAMPLE
alignz 32
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Perform dequantization and inverse DCT on one block of coefficients.
;
; GLOBAL(void)
; jsimd_idct_float_sse(void *dct_table, JCOEFPTR coef_block,
; JSAMPARRAY output_buf, JDIMENSION output_col)
;
%define dct_table(b) (b) + 8 ; void *dct_table
%define coef_block(b) (b) + 12 ; JCOEFPTR coef_block
%define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf
%define output_col(b) (b) + 20 ; JDIMENSION output_col
%define original_ebp ebp + 0
%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_XMMWORD
; xmmword wk[WK_NUM]
%define WK_NUM 2
%define workspace wk(0) - DCTSIZE2 * SIZEOF_FAST_FLOAT
; FAST_FLOAT workspace[DCTSIZE2]
align 32
GLOBAL_FUNCTION(jsimd_idct_float_sse)
EXTN(jsimd_idct_float_sse):
push ebp
mov eax, esp ; eax = original ebp
sub esp, byte 4
and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
mov [esp], eax
mov ebp, esp ; ebp = aligned ebp
lea esp, [workspace]
push ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
get_GOT ebx ; get GOT address
; ---- Pass 1: process columns from input, store into work array.
; mov eax, [original_ebp]
mov edx, POINTER [dct_table(eax)] ; quantptr
mov esi, JCOEFPTR [coef_block(eax)] ; inptr
lea edi, [workspace] ; FAST_FLOAT *wsptr
mov ecx, DCTSIZE/4 ; ctr
alignx 16, 7
.columnloop:
%ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
mov eax, dword [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
or eax, dword [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
jnz near .columnDCT
movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
por mm1, mm0
packsswb mm1, mm1
movd eax, mm1
test eax, eax
jnz short .columnDCT
; -- AC terms all zero
movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
punpckhwd mm1, mm0 ; mm1=(** 02 ** 03)
punpcklwd mm0, mm0 ; mm0=(00 00 01 01)
psrad mm1, (DWORD_BIT-WORD_BIT) ; mm1=in0H=(02 03)
psrad mm0, (DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
cvtpi2ps xmm3, mm1 ; xmm3=(02 03 ** **)
cvtpi2ps xmm0, mm0 ; xmm0=(00 01 ** **)
movlhps xmm0, xmm3 ; xmm0=in0=(00 01 02 03)
mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movaps xmm1, xmm0
movaps xmm2, xmm0
movaps xmm3, xmm0
shufps xmm0, xmm0, 0x00 ; xmm0=(00 00 00 00)
shufps xmm1, xmm1, 0x55 ; xmm1=(01 01 01 01)
shufps xmm2, xmm2, 0xAA ; xmm2=(02 02 02 02)
shufps xmm3, xmm3, 0xFF ; xmm3=(03 03 03 03)
movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0
movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2
movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2
movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3
movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
jmp near .nextcolumn
alignx 16, 7
%endif
.columnDCT:
; -- Even part
movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
punpckhwd mm4, mm0 ; mm4=(** 02 ** 03)
punpcklwd mm0, mm0 ; mm0=(00 00 01 01)
punpckhwd mm5, mm1 ; mm5=(** 22 ** 23)
punpcklwd mm1, mm1 ; mm1=(20 20 21 21)
psrad mm4, (DWORD_BIT-WORD_BIT) ; mm4=in0H=(02 03)
psrad mm0, (DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
cvtpi2ps xmm4, mm4 ; xmm4=(02 03 ** **)
cvtpi2ps xmm0, mm0 ; xmm0=(00 01 ** **)
psrad mm5, (DWORD_BIT-WORD_BIT) ; mm5=in2H=(22 23)
psrad mm1, (DWORD_BIT-WORD_BIT) ; mm1=in2L=(20 21)
cvtpi2ps xmm5, mm5 ; xmm5=(22 23 ** **)
cvtpi2ps xmm1, mm1 ; xmm1=(20 21 ** **)
punpckhwd mm6, mm2 ; mm6=(** 42 ** 43)
punpcklwd mm2, mm2 ; mm2=(40 40 41 41)
punpckhwd mm7, mm3 ; mm7=(** 62 ** 63)
punpcklwd mm3, mm3 ; mm3=(60 60 61 61)
psrad mm6, (DWORD_BIT-WORD_BIT) ; mm6=in4H=(42 43)
psrad mm2, (DWORD_BIT-WORD_BIT) ; mm2=in4L=(40 41)
cvtpi2ps xmm6, mm6 ; xmm6=(42 43 ** **)
cvtpi2ps xmm2, mm2 ; xmm2=(40 41 ** **)
psrad mm7, (DWORD_BIT-WORD_BIT) ; mm7=in6H=(62 63)
psrad mm3, (DWORD_BIT-WORD_BIT) ; mm3=in6L=(60 61)
cvtpi2ps xmm7, mm7 ; xmm7=(62 63 ** **)
cvtpi2ps xmm3, mm3 ; xmm3=(60 61 ** **)
movlhps xmm0, xmm4 ; xmm0=in0=(00 01 02 03)
movlhps xmm1, xmm5 ; xmm1=in2=(20 21 22 23)
mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movlhps xmm2, xmm6 ; xmm2=in4=(40 41 42 43)
movlhps xmm3, xmm7 ; xmm3=in6=(60 61 62 63)
mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movaps xmm4, xmm0
movaps xmm5, xmm1
subps xmm0, xmm2 ; xmm0=tmp11
subps xmm1, xmm3
addps xmm4, xmm2 ; xmm4=tmp10
addps xmm5, xmm3 ; xmm5=tmp13
mulps xmm1, [GOTOFF(ebx,PD_1_414)]
subps xmm1, xmm5 ; xmm1=tmp12
movaps xmm6, xmm4
movaps xmm7, xmm0
subps xmm4, xmm5 ; xmm4=tmp3
subps xmm0, xmm1 ; xmm0=tmp2
addps xmm6, xmm5 ; xmm6=tmp0
addps xmm7, xmm1 ; xmm7=tmp1
movaps XMMWORD [wk(1)], xmm4 ; tmp3
movaps XMMWORD [wk(0)], xmm0 ; tmp2
; -- Odd part
movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movq mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
punpckhwd mm6, mm4 ; mm6=(** 12 ** 13)
punpcklwd mm4, mm4 ; mm4=(10 10 11 11)
punpckhwd mm2, mm0 ; mm2=(** 32 ** 33)
punpcklwd mm0, mm0 ; mm0=(30 30 31 31)
psrad mm6, (DWORD_BIT-WORD_BIT) ; mm6=in1H=(12 13)
psrad mm4, (DWORD_BIT-WORD_BIT) ; mm4=in1L=(10 11)
cvtpi2ps xmm4, mm6 ; xmm4=(12 13 ** **)
cvtpi2ps xmm2, mm4 ; xmm2=(10 11 ** **)
psrad mm2, (DWORD_BIT-WORD_BIT) ; mm2=in3H=(32 33)
psrad mm0, (DWORD_BIT-WORD_BIT) ; mm0=in3L=(30 31)
cvtpi2ps xmm0, mm2 ; xmm0=(32 33 ** **)
cvtpi2ps xmm3, mm0 ; xmm3=(30 31 ** **)
punpckhwd mm7, mm5 ; mm7=(** 52 ** 53)
punpcklwd mm5, mm5 ; mm5=(50 50 51 51)
punpckhwd mm3, mm1 ; mm3=(** 72 ** 73)
punpcklwd mm1, mm1 ; mm1=(70 70 71 71)
movlhps xmm2, xmm4 ; xmm2=in1=(10 11 12 13)
movlhps xmm3, xmm0 ; xmm3=in3=(30 31 32 33)
psrad mm7, (DWORD_BIT-WORD_BIT) ; mm7=in5H=(52 53)
psrad mm5, (DWORD_BIT-WORD_BIT) ; mm5=in5L=(50 51)
cvtpi2ps xmm4, mm7 ; xmm4=(52 53 ** **)
cvtpi2ps xmm5, mm5 ; xmm5=(50 51 ** **)
psrad mm3, (DWORD_BIT-WORD_BIT) ; mm3=in7H=(72 73)
psrad mm1, (DWORD_BIT-WORD_BIT) ; mm1=in7L=(70 71)
cvtpi2ps xmm0, mm3 ; xmm0=(72 73 ** **)
cvtpi2ps xmm1, mm1 ; xmm1=(70 71 ** **)
mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movlhps xmm5, xmm4 ; xmm5=in5=(50 51 52 53)
movlhps xmm1, xmm0 ; xmm1=in7=(70 71 72 73)
mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movaps xmm4, xmm2
movaps xmm0, xmm5
addps xmm2, xmm1 ; xmm2=z11
addps xmm5, xmm3 ; xmm5=z13
subps xmm4, xmm1 ; xmm4=z12
subps xmm0, xmm3 ; xmm0=z10
movaps xmm1, xmm2
subps xmm2, xmm5
addps xmm1, xmm5 ; xmm1=tmp7
mulps xmm2, [GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
movaps xmm3, xmm0
addps xmm0, xmm4
mulps xmm0, [GOTOFF(ebx,PD_1_847)] ; xmm0=z5
mulps xmm3, [GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
mulps xmm4, [GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
addps xmm3, xmm0 ; xmm3=tmp12
subps xmm4, xmm0 ; xmm4=tmp10
; -- Final output stage
subps xmm3, xmm1 ; xmm3=tmp6
movaps xmm5, xmm6
movaps xmm0, xmm7
addps xmm6, xmm1 ; xmm6=data0=(00 01 02 03)
addps xmm7, xmm3 ; xmm7=data1=(10 11 12 13)
subps xmm5, xmm1 ; xmm5=data7=(70 71 72 73)
subps xmm0, xmm3 ; xmm0=data6=(60 61 62 63)
subps xmm2, xmm3 ; xmm2=tmp5
movaps xmm1, xmm6 ; transpose coefficients(phase 1)
unpcklps xmm6, xmm7 ; xmm6=(00 10 01 11)
unpckhps xmm1, xmm7 ; xmm1=(02 12 03 13)
movaps xmm3, xmm0 ; transpose coefficients(phase 1)
unpcklps xmm0, xmm5 ; xmm0=(60 70 61 71)
unpckhps xmm3, xmm5 ; xmm3=(62 72 63 73)
movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3
movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71)
movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73)
addps xmm4, xmm2 ; xmm4=tmp4
movaps xmm0, xmm7
movaps xmm3, xmm5
addps xmm7, xmm2 ; xmm7=data2=(20 21 22 23)
addps xmm5, xmm4 ; xmm5=data4=(40 41 42 43)
subps xmm0, xmm2 ; xmm0=data5=(50 51 52 53)
subps xmm3, xmm4 ; xmm3=data3=(30 31 32 33)
movaps xmm2, xmm7 ; transpose coefficients(phase 1)
unpcklps xmm7, xmm3 ; xmm7=(20 30 21 31)
unpckhps xmm2, xmm3 ; xmm2=(22 32 23 33)
movaps xmm4, xmm5 ; transpose coefficients(phase 1)
unpcklps xmm5, xmm0 ; xmm5=(40 50 41 51)
unpckhps xmm4, xmm0 ; xmm4=(42 52 43 53)
movaps xmm3, xmm6 ; transpose coefficients(phase 2)
unpcklps2 xmm6, xmm7 ; xmm6=(00 10 20 30)
unpckhps2 xmm3, xmm7 ; xmm3=(01 11 21 31)
movaps xmm0, xmm1 ; transpose coefficients(phase 2)
unpcklps2 xmm1, xmm2 ; xmm1=(02 12 22 32)
unpckhps2 xmm0, xmm2 ; xmm0=(03 13 23 33)
movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71)
movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73)
movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6
movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0
movaps xmm6, xmm5 ; transpose coefficients(phase 2)
unpcklps2 xmm5, xmm7 ; xmm5=(40 50 60 70)
unpckhps2 xmm6, xmm7 ; xmm6=(41 51 61 71)
movaps xmm3, xmm4 ; transpose coefficients(phase 2)
unpcklps2 xmm4, xmm2 ; xmm4=(42 52 62 72)
unpckhps2 xmm3, xmm2 ; xmm3=(43 53 63 73)
movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5
movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4
movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
.nextcolumn:
add esi, byte 4*SIZEOF_JCOEF ; coef_block
add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr
add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
dec ecx ; ctr
jnz near .columnloop
; -- Prefetch the next coefficient block
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
; ---- Pass 2: process rows from work array, store into output array.
mov eax, [original_ebp]
lea esi, [workspace] ; FAST_FLOAT *wsptr
mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
mov eax, JDIMENSION [output_col(eax)]
mov ecx, DCTSIZE/4 ; ctr
alignx 16, 7
.rowloop:
; -- Even part
movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm4, xmm0
movaps xmm5, xmm1
subps xmm0, xmm2 ; xmm0=tmp11
subps xmm1, xmm3
addps xmm4, xmm2 ; xmm4=tmp10
addps xmm5, xmm3 ; xmm5=tmp13
mulps xmm1, [GOTOFF(ebx,PD_1_414)]
subps xmm1, xmm5 ; xmm1=tmp12
movaps xmm6, xmm4
movaps xmm7, xmm0
subps xmm4, xmm5 ; xmm4=tmp3
subps xmm0, xmm1 ; xmm0=tmp2
addps xmm6, xmm5 ; xmm6=tmp0
addps xmm7, xmm1 ; xmm7=tmp1
movaps XMMWORD [wk(1)], xmm4 ; tmp3
movaps XMMWORD [wk(0)], xmm0 ; tmp2
; -- Odd part
movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm4, xmm2
movaps xmm0, xmm5
addps xmm2, xmm1 ; xmm2=z11
addps xmm5, xmm3 ; xmm5=z13
subps xmm4, xmm1 ; xmm4=z12
subps xmm0, xmm3 ; xmm0=z10
movaps xmm1, xmm2
subps xmm2, xmm5
addps xmm1, xmm5 ; xmm1=tmp7
mulps xmm2, [GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
movaps xmm3, xmm0
addps xmm0, xmm4
mulps xmm0, [GOTOFF(ebx,PD_1_847)] ; xmm0=z5
mulps xmm3, [GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
mulps xmm4, [GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
addps xmm3, xmm0 ; xmm3=tmp12
subps xmm4, xmm0 ; xmm4=tmp10
; -- Final output stage
subps xmm3, xmm1 ; xmm3=tmp6
movaps xmm5, xmm6
movaps xmm0, xmm7
addps xmm6, xmm1 ; xmm6=data0=(00 10 20 30)
addps xmm7, xmm3 ; xmm7=data1=(01 11 21 31)
subps xmm5, xmm1 ; xmm5=data7=(07 17 27 37)
subps xmm0, xmm3 ; xmm0=data6=(06 16 26 36)
subps xmm2, xmm3 ; xmm2=tmp5
movaps xmm1, [GOTOFF(ebx,PD_0_125)] ; xmm1=[PD_0_125]
mulps xmm6, xmm1 ; descale(1/8)
mulps xmm7, xmm1 ; descale(1/8)
mulps xmm5, xmm1 ; descale(1/8)
mulps xmm0, xmm1 ; descale(1/8)
movhlps xmm3, xmm6
movhlps xmm1, xmm7
cvtps2pi mm0, xmm6 ; round to int32, mm0=data0L=(00 10)
cvtps2pi mm1, xmm7 ; round to int32, mm1=data1L=(01 11)
cvtps2pi mm2, xmm3 ; round to int32, mm2=data0H=(20 30)
cvtps2pi mm3, xmm1 ; round to int32, mm3=data1H=(21 31)
packssdw mm0, mm2 ; mm0=data0=(00 10 20 30)
packssdw mm1, mm3 ; mm1=data1=(01 11 21 31)
movhlps xmm6, xmm5
movhlps xmm7, xmm0
cvtps2pi mm4, xmm5 ; round to int32, mm4=data7L=(07 17)
cvtps2pi mm5, xmm0 ; round to int32, mm5=data6L=(06 16)
cvtps2pi mm6, xmm6 ; round to int32, mm6=data7H=(27 37)
cvtps2pi mm7, xmm7 ; round to int32, mm7=data6H=(26 36)
packssdw mm4, mm6 ; mm4=data7=(07 17 27 37)
packssdw mm5, mm7 ; mm5=data6=(06 16 26 36)
packsswb mm0, mm5 ; mm0=(00 10 20 30 06 16 26 36)
packsswb mm1, mm4 ; mm1=(01 11 21 31 07 17 27 37)
movaps xmm3, XMMWORD [wk(0)] ; xmm3=tmp2
movaps xmm1, XMMWORD [wk(1)] ; xmm1=tmp3
movaps xmm6, [GOTOFF(ebx,PD_0_125)] ; xmm6=[PD_0_125]
addps xmm4, xmm2 ; xmm4=tmp4
movaps xmm5, xmm3
movaps xmm0, xmm1
addps xmm3, xmm2 ; xmm3=data2=(02 12 22 32)
addps xmm1, xmm4 ; xmm1=data4=(04 14 24 34)
subps xmm5, xmm2 ; xmm5=data5=(05 15 25 35)
subps xmm0, xmm4 ; xmm0=data3=(03 13 23 33)
mulps xmm3, xmm6 ; descale(1/8)
mulps xmm1, xmm6 ; descale(1/8)
mulps xmm5, xmm6 ; descale(1/8)
mulps xmm0, xmm6 ; descale(1/8)
movhlps xmm7, xmm3
movhlps xmm2, xmm1
cvtps2pi mm2, xmm3 ; round to int32, mm2=data2L=(02 12)
cvtps2pi mm3, xmm1 ; round to int32, mm3=data4L=(04 14)
cvtps2pi mm6, xmm7 ; round to int32, mm6=data2H=(22 32)
cvtps2pi mm7, xmm2 ; round to int32, mm7=data4H=(24 34)
packssdw mm2, mm6 ; mm2=data2=(02 12 22 32)
packssdw mm3, mm7 ; mm3=data4=(04 14 24 34)
movhlps xmm4, xmm5
movhlps xmm6, xmm0
cvtps2pi mm5, xmm5 ; round to int32, mm5=data5L=(05 15)
cvtps2pi mm4, xmm0 ; round to int32, mm4=data3L=(03 13)
cvtps2pi mm6, xmm4 ; round to int32, mm6=data5H=(25 35)
cvtps2pi mm7, xmm6 ; round to int32, mm7=data3H=(23 33)
packssdw mm5, mm6 ; mm5=data5=(05 15 25 35)
packssdw mm4, mm7 ; mm4=data3=(03 13 23 33)
movq mm6, [GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP]
packsswb mm2, mm3 ; mm2=(02 12 22 32 04 14 24 34)
packsswb mm4, mm5 ; mm4=(03 13 23 33 05 15 25 35)
paddb mm0, mm6
paddb mm1, mm6
paddb mm2, mm6
paddb mm4, mm6
movq mm7, mm0 ; transpose coefficients(phase 1)
punpcklbw mm0, mm1 ; mm0=(00 01 10 11 20 21 30 31)
punpckhbw mm7, mm1 ; mm7=(06 07 16 17 26 27 36 37)
movq mm3, mm2 ; transpose coefficients(phase 1)
punpcklbw mm2, mm4 ; mm2=(02 03 12 13 22 23 32 33)
punpckhbw mm3, mm4 ; mm3=(04 05 14 15 24 25 34 35)
movq mm5, mm0 ; transpose coefficients(phase 2)
punpcklwd mm0, mm2 ; mm0=(00 01 02 03 10 11 12 13)
punpckhwd mm5, mm2 ; mm5=(20 21 22 23 30 31 32 33)
movq mm6, mm3 ; transpose coefficients(phase 2)
punpcklwd mm3, mm7 ; mm3=(04 05 06 07 14 15 16 17)
punpckhwd mm6, mm7 ; mm6=(24 25 26 27 34 35 36 37)
movq mm1, mm0 ; transpose coefficients(phase 3)
punpckldq mm0, mm3 ; mm0=(00 01 02 03 04 05 06 07)
punpckhdq mm1, mm3 ; mm1=(10 11 12 13 14 15 16 17)
movq mm4, mm5 ; transpose coefficients(phase 3)
punpckldq mm5, mm6 ; mm5=(20 21 22 23 24 25 26 27)
punpckhdq mm4, mm6 ; mm4=(30 31 32 33 34 35 36 37)
pushpic ebx ; save GOT address
mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0
movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1
mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5
movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4
poppic ebx ; restore GOT address
add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr
add edi, byte 4*SIZEOF_JSAMPROW
dec ecx ; ctr
jnz near .rowloop
emms ; empty MMX state
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
pop ebx
mov esp, ebp ; esp <- aligned ebp
pop esp ; esp <- original ebp
pop ebp
ret
; For some reason, the OS X linker does not honor the request to align the
; segment unless we do this.
align 32
|
