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
|
;
; jidctfst.asm - fast integer IDCT (SSE2)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
;
; 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 fast, not so accurate integer implementation of
; the inverse DCT (Discrete Cosine Transform). The following code is
; based directly on the IJG's original jidctfst.c; see the jidctfst.c
; for more details.
;
; [TAB8]
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
%define CONST_BITS 8 ; 14 is also OK.
%define PASS1_BITS 2
%if IFAST_SCALE_BITS != PASS1_BITS
%error "'IFAST_SCALE_BITS' must be equal to 'PASS1_BITS'."
%endif
%if CONST_BITS == 8
F_1_082 equ 277 ; FIX(1.082392200)
F_1_414 equ 362 ; FIX(1.414213562)
F_1_847 equ 473 ; FIX(1.847759065)
F_2_613 equ 669 ; FIX(2.613125930)
F_1_613 equ (F_2_613 - 256) ; FIX(2.613125930) - FIX(1)
%else
; NASM cannot do compile-time arithmetic on floating-point constants.
%define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
F_1_082 equ DESCALE(1162209775,30-CONST_BITS) ; FIX(1.082392200)
F_1_414 equ DESCALE(1518500249,30-CONST_BITS) ; FIX(1.414213562)
F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
F_2_613 equ DESCALE(2805822602,30-CONST_BITS) ; FIX(2.613125930)
F_1_613 equ (F_2_613 - (1 << CONST_BITS)) ; FIX(2.613125930) - FIX(1)
%endif
; --------------------------------------------------------------------------
SECTION SEG_CONST
; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow)
; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw)
%define PRE_MULTIPLY_SCALE_BITS 2
%define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
alignz 16
global EXTN(jconst_idct_ifast_sse2)
EXTN(jconst_idct_ifast_sse2):
PW_F1414 times 8 dw F_1_414 << CONST_SHIFT
PW_F1847 times 8 dw F_1_847 << CONST_SHIFT
PW_MF1613 times 8 dw -F_1_613 << CONST_SHIFT
PW_F1082 times 8 dw F_1_082 << CONST_SHIFT
PB_CENTERJSAMP times 16 db CENTERJSAMPLE
alignz 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Perform dequantization and inverse DCT on one block of coefficients.
;
; GLOBAL(void)
; jsimd_idct_ifast_sse2 (void *dct_table, JCOEFPTR coef_block,
; JSAMPARRAY output_buf, JDIMENSION output_col)
;
%define dct_table(b) (b)+8 ; jpeg_component_info *compptr
%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
align 16
global EXTN(jsimd_idct_ifast_sse2)
EXTN(jsimd_idct_ifast_sse2):
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, [wk(0)]
pushpic ebx
; push ecx ; unused
; push edx ; need not be preserved
push esi
push edi
get_GOT ebx ; get GOT address
; ---- Pass 1: process columns from input.
; mov eax, [original_ebp]
mov edx, POINTER [dct_table(eax)] ; quantptr
mov esi, JCOEFPTR [coef_block(eax)] ; inptr
%ifndef NO_ZERO_COLUMN_TEST_IFAST_SSE2
mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
jnz near .columnDCT
movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
por xmm1, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
por xmm1, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
por xmm1,xmm0
packsswb xmm1,xmm1
packsswb xmm1,xmm1
movd eax,xmm1
test eax,eax
jnz short .columnDCT
; -- AC terms all zero
movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
movdqa xmm7,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07)
punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
punpckhwd xmm7,xmm7 ; xmm7=(04 04 05 05 06 06 07 07)
pshufd xmm6,xmm0,0x00 ; xmm6=col0=(00 00 00 00 00 00 00 00)
pshufd xmm2,xmm0,0x55 ; xmm2=col1=(01 01 01 01 01 01 01 01)
pshufd xmm5,xmm0,0xAA ; xmm5=col2=(02 02 02 02 02 02 02 02)
pshufd xmm0,xmm0,0xFF ; xmm0=col3=(03 03 03 03 03 03 03 03)
pshufd xmm1,xmm7,0x00 ; xmm1=col4=(04 04 04 04 04 04 04 04)
pshufd xmm4,xmm7,0x55 ; xmm4=col5=(05 05 05 05 05 05 05 05)
pshufd xmm3,xmm7,0xAA ; xmm3=col6=(06 06 06 06 06 06 06 06)
pshufd xmm7,xmm7,0xFF ; xmm7=col7=(07 07 07 07 07 07 07 07)
movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=col1
movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=col3
jmp near .column_end
alignx 16,7
%endif
.columnDCT:
; -- Even part
movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_IFAST_MULT_TYPE)]
pmullw xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_IFAST_MULT_TYPE)]
movdqa xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
movdqa xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
pmullw xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_IFAST_MULT_TYPE)]
pmullw xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_IFAST_MULT_TYPE)]
movdqa xmm4,xmm0
movdqa xmm5,xmm1
psubw xmm0,xmm2 ; xmm0=tmp11
psubw xmm1,xmm3
paddw xmm4,xmm2 ; xmm4=tmp10
paddw xmm5,xmm3 ; xmm5=tmp13
psllw xmm1,PRE_MULTIPLY_SCALE_BITS
pmulhw xmm1,[GOTOFF(ebx,PW_F1414)]
psubw xmm1,xmm5 ; xmm1=tmp12
movdqa xmm6,xmm4
movdqa xmm7,xmm0
psubw xmm4,xmm5 ; xmm4=tmp3
psubw xmm0,xmm1 ; xmm0=tmp2
paddw xmm6,xmm5 ; xmm6=tmp0
paddw xmm7,xmm1 ; xmm7=tmp1
movdqa XMMWORD [wk(1)], xmm4 ; wk(1)=tmp3
movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=tmp2
; -- Odd part
movdqa xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movdqa xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
pmullw xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_IFAST_MULT_TYPE)]
pmullw xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_IFAST_MULT_TYPE)]
movdqa xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
movdqa xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
pmullw xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_IFAST_MULT_TYPE)]
pmullw xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_IFAST_MULT_TYPE)]
movdqa xmm4,xmm2
movdqa xmm0,xmm5
psubw xmm2,xmm1 ; xmm2=z12
psubw xmm5,xmm3 ; xmm5=z10
paddw xmm4,xmm1 ; xmm4=z11
paddw xmm0,xmm3 ; xmm0=z13
movdqa xmm1,xmm5 ; xmm1=z10(unscaled)
psllw xmm2,PRE_MULTIPLY_SCALE_BITS
psllw xmm5,PRE_MULTIPLY_SCALE_BITS
movdqa xmm3,xmm4
psubw xmm4,xmm0
paddw xmm3,xmm0 ; xmm3=tmp7
psllw xmm4,PRE_MULTIPLY_SCALE_BITS
pmulhw xmm4,[GOTOFF(ebx,PW_F1414)] ; xmm4=tmp11
; To avoid overflow...
;
; (Original)
; tmp12 = -2.613125930 * z10 + z5;
;
; (This implementation)
; tmp12 = (-1.613125930 - 1) * z10 + z5;
; = -1.613125930 * z10 - z10 + z5;
movdqa xmm0,xmm5
paddw xmm5,xmm2
pmulhw xmm5,[GOTOFF(ebx,PW_F1847)] ; xmm5=z5
pmulhw xmm0,[GOTOFF(ebx,PW_MF1613)]
pmulhw xmm2,[GOTOFF(ebx,PW_F1082)]
psubw xmm0,xmm1
psubw xmm2,xmm5 ; xmm2=tmp10
paddw xmm0,xmm5 ; xmm0=tmp12
; -- Final output stage
psubw xmm0,xmm3 ; xmm0=tmp6
movdqa xmm1,xmm6
movdqa xmm5,xmm7
paddw xmm6,xmm3 ; xmm6=data0=(00 01 02 03 04 05 06 07)
paddw xmm7,xmm0 ; xmm7=data1=(10 11 12 13 14 15 16 17)
psubw xmm1,xmm3 ; xmm1=data7=(70 71 72 73 74 75 76 77)
psubw xmm5,xmm0 ; xmm5=data6=(60 61 62 63 64 65 66 67)
psubw xmm4,xmm0 ; xmm4=tmp5
movdqa xmm3,xmm6 ; transpose coefficients(phase 1)
punpcklwd xmm6,xmm7 ; xmm6=(00 10 01 11 02 12 03 13)
punpckhwd xmm3,xmm7 ; xmm3=(04 14 05 15 06 16 07 17)
movdqa xmm0,xmm5 ; transpose coefficients(phase 1)
punpcklwd xmm5,xmm1 ; xmm5=(60 70 61 71 62 72 63 73)
punpckhwd xmm0,xmm1 ; xmm0=(64 74 65 75 66 76 67 77)
movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
movdqa xmm1, XMMWORD [wk(1)] ; xmm1=tmp3
movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(60 70 61 71 62 72 63 73)
movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(64 74 65 75 66 76 67 77)
paddw xmm2,xmm4 ; xmm2=tmp4
movdqa xmm5,xmm7
movdqa xmm0,xmm1
paddw xmm7,xmm4 ; xmm7=data2=(20 21 22 23 24 25 26 27)
paddw xmm1,xmm2 ; xmm1=data4=(40 41 42 43 44 45 46 47)
psubw xmm5,xmm4 ; xmm5=data5=(50 51 52 53 54 55 56 57)
psubw xmm0,xmm2 ; xmm0=data3=(30 31 32 33 34 35 36 37)
movdqa xmm4,xmm7 ; transpose coefficients(phase 1)
punpcklwd xmm7,xmm0 ; xmm7=(20 30 21 31 22 32 23 33)
punpckhwd xmm4,xmm0 ; xmm4=(24 34 25 35 26 36 27 37)
movdqa xmm2,xmm1 ; transpose coefficients(phase 1)
punpcklwd xmm1,xmm5 ; xmm1=(40 50 41 51 42 52 43 53)
punpckhwd xmm2,xmm5 ; xmm2=(44 54 45 55 46 56 47 57)
movdqa xmm0,xmm3 ; transpose coefficients(phase 2)
punpckldq xmm3,xmm4 ; xmm3=(04 14 24 34 05 15 25 35)
punpckhdq xmm0,xmm4 ; xmm0=(06 16 26 36 07 17 27 37)
movdqa xmm5,xmm6 ; transpose coefficients(phase 2)
punpckldq xmm6,xmm7 ; xmm6=(00 10 20 30 01 11 21 31)
punpckhdq xmm5,xmm7 ; xmm5=(02 12 22 32 03 13 23 33)
movdqa xmm4, XMMWORD [wk(0)] ; xmm4=(60 70 61 71 62 72 63 73)
movdqa xmm7, XMMWORD [wk(1)] ; xmm7=(64 74 65 75 66 76 67 77)
movdqa XMMWORD [wk(0)], xmm3 ; wk(0)=(04 14 24 34 05 15 25 35)
movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(06 16 26 36 07 17 27 37)
movdqa xmm3,xmm1 ; transpose coefficients(phase 2)
punpckldq xmm1,xmm4 ; xmm1=(40 50 60 70 41 51 61 71)
punpckhdq xmm3,xmm4 ; xmm3=(42 52 62 72 43 53 63 73)
movdqa xmm0,xmm2 ; transpose coefficients(phase 2)
punpckldq xmm2,xmm7 ; xmm2=(44 54 64 74 45 55 65 75)
punpckhdq xmm0,xmm7 ; xmm0=(46 56 66 76 47 57 67 77)
movdqa xmm4,xmm6 ; transpose coefficients(phase 3)
punpcklqdq xmm6,xmm1 ; xmm6=col0=(00 10 20 30 40 50 60 70)
punpckhqdq xmm4,xmm1 ; xmm4=col1=(01 11 21 31 41 51 61 71)
movdqa xmm7,xmm5 ; transpose coefficients(phase 3)
punpcklqdq xmm5,xmm3 ; xmm5=col2=(02 12 22 32 42 52 62 72)
punpckhqdq xmm7,xmm3 ; xmm7=col3=(03 13 23 33 43 53 63 73)
movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(04 14 24 34 05 15 25 35)
movdqa xmm3, XMMWORD [wk(1)] ; xmm3=(06 16 26 36 07 17 27 37)
movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=col1
movdqa XMMWORD [wk(1)], xmm7 ; wk(1)=col3
movdqa xmm4,xmm1 ; transpose coefficients(phase 3)
punpcklqdq xmm1,xmm2 ; xmm1=col4=(04 14 24 34 44 54 64 74)
punpckhqdq xmm4,xmm2 ; xmm4=col5=(05 15 25 35 45 55 65 75)
movdqa xmm7,xmm3 ; transpose coefficients(phase 3)
punpcklqdq xmm3,xmm0 ; xmm3=col6=(06 16 26 36 46 56 66 76)
punpckhqdq xmm7,xmm0 ; xmm7=col7=(07 17 27 37 47 57 67 77)
.column_end:
; -- Prefetch the next coefficient block
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
; ---- Pass 2: process rows from work array, store into output array.
mov eax, [original_ebp]
mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
mov eax, JDIMENSION [output_col(eax)]
; -- Even part
; xmm6=col0, xmm5=col2, xmm1=col4, xmm3=col6
movdqa xmm2,xmm6
movdqa xmm0,xmm5
psubw xmm6,xmm1 ; xmm6=tmp11
psubw xmm5,xmm3
paddw xmm2,xmm1 ; xmm2=tmp10
paddw xmm0,xmm3 ; xmm0=tmp13
psllw xmm5,PRE_MULTIPLY_SCALE_BITS
pmulhw xmm5,[GOTOFF(ebx,PW_F1414)]
psubw xmm5,xmm0 ; xmm5=tmp12
movdqa xmm1,xmm2
movdqa xmm3,xmm6
psubw xmm2,xmm0 ; xmm2=tmp3
psubw xmm6,xmm5 ; xmm6=tmp2
paddw xmm1,xmm0 ; xmm1=tmp0
paddw xmm3,xmm5 ; xmm3=tmp1
movdqa xmm0, XMMWORD [wk(0)] ; xmm0=col1
movdqa xmm5, XMMWORD [wk(1)] ; xmm5=col3
movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp3
movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=tmp2
; -- Odd part
; xmm0=col1, xmm5=col3, xmm4=col5, xmm7=col7
movdqa xmm2,xmm0
movdqa xmm6,xmm4
psubw xmm0,xmm7 ; xmm0=z12
psubw xmm4,xmm5 ; xmm4=z10
paddw xmm2,xmm7 ; xmm2=z11
paddw xmm6,xmm5 ; xmm6=z13
movdqa xmm7,xmm4 ; xmm7=z10(unscaled)
psllw xmm0,PRE_MULTIPLY_SCALE_BITS
psllw xmm4,PRE_MULTIPLY_SCALE_BITS
movdqa xmm5,xmm2
psubw xmm2,xmm6
paddw xmm5,xmm6 ; xmm5=tmp7
psllw xmm2,PRE_MULTIPLY_SCALE_BITS
pmulhw xmm2,[GOTOFF(ebx,PW_F1414)] ; xmm2=tmp11
; To avoid overflow...
;
; (Original)
; tmp12 = -2.613125930 * z10 + z5;
;
; (This implementation)
; tmp12 = (-1.613125930 - 1) * z10 + z5;
; = -1.613125930 * z10 - z10 + z5;
movdqa xmm6,xmm4
paddw xmm4,xmm0
pmulhw xmm4,[GOTOFF(ebx,PW_F1847)] ; xmm4=z5
pmulhw xmm6,[GOTOFF(ebx,PW_MF1613)]
pmulhw xmm0,[GOTOFF(ebx,PW_F1082)]
psubw xmm6,xmm7
psubw xmm0,xmm4 ; xmm0=tmp10
paddw xmm6,xmm4 ; xmm6=tmp12
; -- Final output stage
psubw xmm6,xmm5 ; xmm6=tmp6
movdqa xmm7,xmm1
movdqa xmm4,xmm3
paddw xmm1,xmm5 ; xmm1=data0=(00 10 20 30 40 50 60 70)
paddw xmm3,xmm6 ; xmm3=data1=(01 11 21 31 41 51 61 71)
psraw xmm1,(PASS1_BITS+3) ; descale
psraw xmm3,(PASS1_BITS+3) ; descale
psubw xmm7,xmm5 ; xmm7=data7=(07 17 27 37 47 57 67 77)
psubw xmm4,xmm6 ; xmm4=data6=(06 16 26 36 46 56 66 76)
psraw xmm7,(PASS1_BITS+3) ; descale
psraw xmm4,(PASS1_BITS+3) ; descale
psubw xmm2,xmm6 ; xmm2=tmp5
packsswb xmm1,xmm4 ; xmm1=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
packsswb xmm3,xmm7 ; xmm3=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp2
movdqa xmm6, XMMWORD [wk(0)] ; xmm6=tmp3
paddw xmm0,xmm2 ; xmm0=tmp4
movdqa xmm4,xmm5
movdqa xmm7,xmm6
paddw xmm5,xmm2 ; xmm5=data2=(02 12 22 32 42 52 62 72)
paddw xmm6,xmm0 ; xmm6=data4=(04 14 24 34 44 54 64 74)
psraw xmm5,(PASS1_BITS+3) ; descale
psraw xmm6,(PASS1_BITS+3) ; descale
psubw xmm4,xmm2 ; xmm4=data5=(05 15 25 35 45 55 65 75)
psubw xmm7,xmm0 ; xmm7=data3=(03 13 23 33 43 53 63 73)
psraw xmm4,(PASS1_BITS+3) ; descale
psraw xmm7,(PASS1_BITS+3) ; descale
movdqa xmm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm2=[PB_CENTERJSAMP]
packsswb xmm5,xmm6 ; xmm5=(02 12 22 32 42 52 62 72 04 14 24 34 44 54 64 74)
packsswb xmm7,xmm4 ; xmm7=(03 13 23 33 43 53 63 73 05 15 25 35 45 55 65 75)
paddb xmm1,xmm2
paddb xmm3,xmm2
paddb xmm5,xmm2
paddb xmm7,xmm2
movdqa xmm0,xmm1 ; transpose coefficients(phase 1)
punpcklbw xmm1,xmm3 ; xmm1=(00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71)
punpckhbw xmm0,xmm3 ; xmm0=(06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77)
movdqa xmm6,xmm5 ; transpose coefficients(phase 1)
punpcklbw xmm5,xmm7 ; xmm5=(02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73)
punpckhbw xmm6,xmm7 ; xmm6=(04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75)
movdqa xmm4,xmm1 ; transpose coefficients(phase 2)
punpcklwd xmm1,xmm5 ; xmm1=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
punpckhwd xmm4,xmm5 ; xmm4=(40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73)
movdqa xmm2,xmm6 ; transpose coefficients(phase 2)
punpcklwd xmm6,xmm0 ; xmm6=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
punpckhwd xmm2,xmm0 ; xmm2=(44 45 46 47 54 55 56 57 64 65 66 67 74 75 76 77)
movdqa xmm3,xmm1 ; transpose coefficients(phase 3)
punpckldq xmm1,xmm6 ; xmm1=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
punpckhdq xmm3,xmm6 ; xmm3=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
movdqa xmm7,xmm4 ; transpose coefficients(phase 3)
punpckldq xmm4,xmm2 ; xmm4=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57)
punpckhdq xmm7,xmm2 ; xmm7=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77)
pshufd xmm5,xmm1,0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
pshufd xmm0,xmm3,0x4E ; xmm0=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
pshufd xmm6,xmm4,0x4E ; xmm6=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47)
pshufd xmm2,xmm7,0x4E ; xmm2=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67)
mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm1
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm3
mov edx, JSAMPROW [edi+4*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+6*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm4
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm7
mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm5
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm0
mov edx, JSAMPROW [edi+5*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+7*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm2
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; unused
poppic 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 16
|
