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
|
;
; jidctflt.asm - floating-point IDCT (64-bit SSE & SSE2)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2009, 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.
;
; [TAB8]
%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 16
global EXTN(jconst_idct_float_sse2)
EXTN(jconst_idct_float_sse2):
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_RNDINT_MAGIC times 4 dd 100663296.0 ; (float)(0x00C00000 << 3)
PB_CENTERJSAMP times 16 db CENTERJSAMPLE
alignz 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 64
;
; Perform dequantization and inverse DCT on one block of coefficients.
;
; GLOBAL(void)
; jsimd_idct_float_sse2 (void *dct_table, JCOEFPTR coef_block,
; JSAMPARRAY output_buf, JDIMENSION output_col)
;
; r10 = void *dct_table
; r11 = JCOEFPTR coef_block
; r12 = JSAMPARRAY output_buf
; r13 = JDIMENSION output_col
%define original_rbp rbp+0
%define wk(i) rbp-(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 16
global EXTN(jsimd_idct_float_sse2)
EXTN(jsimd_idct_float_sse2):
push rbp
mov rax,rsp ; rax = original rbp
sub rsp, byte 4
and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
mov [rsp],rax
mov rbp,rsp ; rbp = aligned rbp
lea rsp, [workspace]
collect_args
push rbx
; ---- Pass 1: process columns from input, store into work array.
mov rdx, r10 ; quantptr
mov rsi, r11 ; inptr
lea rdi, [workspace] ; FAST_FLOAT *wsptr
mov rcx, DCTSIZE/4 ; ctr
.columnloop:
%ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
mov eax, DWORD [DWBLOCK(1,0,rsi,SIZEOF_JCOEF)]
or eax, DWORD [DWBLOCK(2,0,rsi,SIZEOF_JCOEF)]
jnz near .columnDCT
movq xmm1, XMM_MMWORD [MMBLOCK(1,0,rsi,SIZEOF_JCOEF)]
movq xmm2, XMM_MMWORD [MMBLOCK(2,0,rsi,SIZEOF_JCOEF)]
movq xmm3, XMM_MMWORD [MMBLOCK(3,0,rsi,SIZEOF_JCOEF)]
movq xmm4, XMM_MMWORD [MMBLOCK(4,0,rsi,SIZEOF_JCOEF)]
movq xmm5, XMM_MMWORD [MMBLOCK(5,0,rsi,SIZEOF_JCOEF)]
movq xmm6, XMM_MMWORD [MMBLOCK(6,0,rsi,SIZEOF_JCOEF)]
movq xmm7, XMM_MMWORD [MMBLOCK(7,0,rsi,SIZEOF_JCOEF)]
por xmm1,xmm2
por xmm3,xmm4
por xmm5,xmm6
por xmm1,xmm3
por xmm5,xmm7
por xmm1,xmm5
packsswb xmm1,xmm1
movd eax,xmm1
test rax,rax
jnz short .columnDCT
; -- AC terms all zero
movq xmm0, XMM_MMWORD [MMBLOCK(0,0,rsi,SIZEOF_JCOEF)]
punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
psrad xmm0,(DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03)
cvtdq2ps xmm0,xmm0 ; xmm0=in0=(00 01 02 03)
mulps xmm0, XMMWORD [XMMBLOCK(0,0,rdx,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,rdi,SIZEOF_FAST_FLOAT)], xmm0
movaps XMMWORD [XMMBLOCK(0,1,rdi,SIZEOF_FAST_FLOAT)], xmm0
movaps XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(1,1,rdi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(2,0,rdi,SIZEOF_FAST_FLOAT)], xmm2
movaps XMMWORD [XMMBLOCK(2,1,rdi,SIZEOF_FAST_FLOAT)], xmm2
movaps XMMWORD [XMMBLOCK(3,0,rdi,SIZEOF_FAST_FLOAT)], xmm3
movaps XMMWORD [XMMBLOCK(3,1,rdi,SIZEOF_FAST_FLOAT)], xmm3
jmp near .nextcolumn
%endif
.columnDCT:
; -- Even part
movq xmm0, XMM_MMWORD [MMBLOCK(0,0,rsi,SIZEOF_JCOEF)]
movq xmm1, XMM_MMWORD [MMBLOCK(2,0,rsi,SIZEOF_JCOEF)]
movq xmm2, XMM_MMWORD [MMBLOCK(4,0,rsi,SIZEOF_JCOEF)]
movq xmm3, XMM_MMWORD [MMBLOCK(6,0,rsi,SIZEOF_JCOEF)]
punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
punpcklwd xmm1,xmm1 ; xmm1=(20 20 21 21 22 22 23 23)
psrad xmm0,(DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03)
psrad xmm1,(DWORD_BIT-WORD_BIT) ; xmm1=in2=(20 21 22 23)
cvtdq2ps xmm0,xmm0 ; xmm0=in0=(00 01 02 03)
cvtdq2ps xmm1,xmm1 ; xmm1=in2=(20 21 22 23)
punpcklwd xmm2,xmm2 ; xmm2=(40 40 41 41 42 42 43 43)
punpcklwd xmm3,xmm3 ; xmm3=(60 60 61 61 62 62 63 63)
psrad xmm2,(DWORD_BIT-WORD_BIT) ; xmm2=in4=(40 41 42 43)
psrad xmm3,(DWORD_BIT-WORD_BIT) ; xmm3=in6=(60 61 62 63)
cvtdq2ps xmm2,xmm2 ; xmm2=in4=(40 41 42 43)
cvtdq2ps xmm3,xmm3 ; xmm3=in6=(60 61 62 63)
mulps xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm1, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm2, XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm3, XMMWORD [XMMBLOCK(6,0,rdx,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,[rel 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 xmm2, XMM_MMWORD [MMBLOCK(1,0,rsi,SIZEOF_JCOEF)]
movq xmm3, XMM_MMWORD [MMBLOCK(3,0,rsi,SIZEOF_JCOEF)]
movq xmm5, XMM_MMWORD [MMBLOCK(5,0,rsi,SIZEOF_JCOEF)]
movq xmm1, XMM_MMWORD [MMBLOCK(7,0,rsi,SIZEOF_JCOEF)]
punpcklwd xmm2,xmm2 ; xmm2=(10 10 11 11 12 12 13 13)
punpcklwd xmm3,xmm3 ; xmm3=(30 30 31 31 32 32 33 33)
psrad xmm2,(DWORD_BIT-WORD_BIT) ; xmm2=in1=(10 11 12 13)
psrad xmm3,(DWORD_BIT-WORD_BIT) ; xmm3=in3=(30 31 32 33)
cvtdq2ps xmm2,xmm2 ; xmm2=in1=(10 11 12 13)
cvtdq2ps xmm3,xmm3 ; xmm3=in3=(30 31 32 33)
punpcklwd xmm5,xmm5 ; xmm5=(50 50 51 51 52 52 53 53)
punpcklwd xmm1,xmm1 ; xmm1=(70 70 71 71 72 72 73 73)
psrad xmm5,(DWORD_BIT-WORD_BIT) ; xmm5=in5=(50 51 52 53)
psrad xmm1,(DWORD_BIT-WORD_BIT) ; xmm1=in7=(70 71 72 73)
cvtdq2ps xmm5,xmm5 ; xmm5=in5=(50 51 52 53)
cvtdq2ps xmm1,xmm1 ; xmm1=in7=(70 71 72 73)
mulps xmm2, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm3, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm5, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm1, XMMWORD [XMMBLOCK(7,0,rdx,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,[rel PD_1_414] ; xmm2=tmp11
movaps xmm3,xmm0
addps xmm0,xmm4
mulps xmm0,[rel PD_1_847] ; xmm0=z5
mulps xmm3,[rel PD_M2_613] ; xmm3=(z10 * -2.613125930)
mulps xmm4,[rel 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,rdi,SIZEOF_FAST_FLOAT)], xmm6
movaps XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_FAST_FLOAT)], xmm3
movaps XMMWORD [XMMBLOCK(2,0,rdi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(3,0,rdi,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,rdi,SIZEOF_FAST_FLOAT)], xmm5
movaps XMMWORD [XMMBLOCK(1,1,rdi,SIZEOF_FAST_FLOAT)], xmm6
movaps XMMWORD [XMMBLOCK(2,1,rdi,SIZEOF_FAST_FLOAT)], xmm4
movaps XMMWORD [XMMBLOCK(3,1,rdi,SIZEOF_FAST_FLOAT)], xmm3
.nextcolumn:
add rsi, byte 4*SIZEOF_JCOEF ; coef_block
add rdx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr
add rdi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
dec rcx ; ctr
jnz near .columnloop
; -- Prefetch the next coefficient block
prefetchnta [rsi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
prefetchnta [rsi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
prefetchnta [rsi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
prefetchnta [rsi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
; ---- Pass 2: process rows from work array, store into output array.
mov rax, [original_rbp]
lea rsi, [workspace] ; FAST_FLOAT *wsptr
mov rdi, r12 ; (JSAMPROW *)
mov eax, r13d
mov rcx, DCTSIZE/4 ; ctr
.rowloop:
; -- Even part
movaps xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_FAST_FLOAT)]
movaps xmm1, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_FAST_FLOAT)]
movaps xmm2, XMMWORD [XMMBLOCK(4,0,rsi,SIZEOF_FAST_FLOAT)]
movaps xmm3, XMMWORD [XMMBLOCK(6,0,rsi,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,[rel 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,rsi,SIZEOF_FAST_FLOAT)]
movaps xmm3, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_FAST_FLOAT)]
movaps xmm5, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_FAST_FLOAT)]
movaps xmm1, XMMWORD [XMMBLOCK(7,0,rsi,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,[rel PD_1_414] ; xmm2=tmp11
movaps xmm3,xmm0
addps xmm0,xmm4
mulps xmm0,[rel PD_1_847] ; xmm0=z5
mulps xmm3,[rel PD_M2_613] ; xmm3=(z10 * -2.613125930)
mulps xmm4,[rel 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,[rel PD_RNDINT_MAGIC] ; xmm1=[rel PD_RNDINT_MAGIC]
pcmpeqd xmm3,xmm3
psrld xmm3,WORD_BIT ; xmm3={0xFFFF 0x0000 0xFFFF 0x0000 ..}
addps xmm6,xmm1 ; xmm6=roundint(data0/8)=(00 ** 10 ** 20 ** 30 **)
addps xmm7,xmm1 ; xmm7=roundint(data1/8)=(01 ** 11 ** 21 ** 31 **)
addps xmm0,xmm1 ; xmm0=roundint(data6/8)=(06 ** 16 ** 26 ** 36 **)
addps xmm5,xmm1 ; xmm5=roundint(data7/8)=(07 ** 17 ** 27 ** 37 **)
pand xmm6,xmm3 ; xmm6=(00 -- 10 -- 20 -- 30 --)
pslld xmm7,WORD_BIT ; xmm7=(-- 01 -- 11 -- 21 -- 31)
pand xmm0,xmm3 ; xmm0=(06 -- 16 -- 26 -- 36 --)
pslld xmm5,WORD_BIT ; xmm5=(-- 07 -- 17 -- 27 -- 37)
por xmm6,xmm7 ; xmm6=(00 01 10 11 20 21 30 31)
por xmm0,xmm5 ; xmm0=(06 07 16 17 26 27 36 37)
movaps xmm1, XMMWORD [wk(0)] ; xmm1=tmp2
movaps xmm3, XMMWORD [wk(1)] ; xmm3=tmp3
addps xmm4,xmm2 ; xmm4=tmp4
movaps xmm7,xmm1
movaps xmm5,xmm3
addps xmm1,xmm2 ; xmm1=data2=(02 12 22 32)
addps xmm3,xmm4 ; xmm3=data4=(04 14 24 34)
subps xmm7,xmm2 ; xmm7=data5=(05 15 25 35)
subps xmm5,xmm4 ; xmm5=data3=(03 13 23 33)
movaps xmm2,[rel PD_RNDINT_MAGIC] ; xmm2=[rel PD_RNDINT_MAGIC]
pcmpeqd xmm4,xmm4
psrld xmm4,WORD_BIT ; xmm4={0xFFFF 0x0000 0xFFFF 0x0000 ..}
addps xmm3,xmm2 ; xmm3=roundint(data4/8)=(04 ** 14 ** 24 ** 34 **)
addps xmm7,xmm2 ; xmm7=roundint(data5/8)=(05 ** 15 ** 25 ** 35 **)
addps xmm1,xmm2 ; xmm1=roundint(data2/8)=(02 ** 12 ** 22 ** 32 **)
addps xmm5,xmm2 ; xmm5=roundint(data3/8)=(03 ** 13 ** 23 ** 33 **)
pand xmm3,xmm4 ; xmm3=(04 -- 14 -- 24 -- 34 --)
pslld xmm7,WORD_BIT ; xmm7=(-- 05 -- 15 -- 25 -- 35)
pand xmm1,xmm4 ; xmm1=(02 -- 12 -- 22 -- 32 --)
pslld xmm5,WORD_BIT ; xmm5=(-- 03 -- 13 -- 23 -- 33)
por xmm3,xmm7 ; xmm3=(04 05 14 15 24 25 34 35)
por xmm1,xmm5 ; xmm1=(02 03 12 13 22 23 32 33)
movdqa xmm2,[rel PB_CENTERJSAMP] ; xmm2=[rel PB_CENTERJSAMP]
packsswb xmm6,xmm3 ; xmm6=(00 01 10 11 20 21 30 31 04 05 14 15 24 25 34 35)
packsswb xmm1,xmm0 ; xmm1=(02 03 12 13 22 23 32 33 06 07 16 17 26 27 36 37)
paddb xmm6,xmm2
paddb xmm1,xmm2
movdqa xmm4,xmm6 ; transpose coefficients(phase 2)
punpcklwd xmm6,xmm1 ; xmm6=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
punpckhwd xmm4,xmm1 ; xmm4=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
movdqa xmm7,xmm6 ; transpose coefficients(phase 3)
punpckldq xmm6,xmm4 ; xmm6=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
punpckhdq xmm7,xmm4 ; xmm7=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
pshufd xmm5,xmm6,0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
pshufd xmm3,xmm7,0x4E ; xmm3=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
mov rdx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW]
mov rbx, JSAMPROW [rdi+2*SIZEOF_JSAMPROW]
movq XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm6
movq XMM_MMWORD [rbx+rax*SIZEOF_JSAMPLE], xmm7
mov rdx, JSAMPROW [rdi+1*SIZEOF_JSAMPROW]
mov rbx, JSAMPROW [rdi+3*SIZEOF_JSAMPROW]
movq XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm5
movq XMM_MMWORD [rbx+rax*SIZEOF_JSAMPLE], xmm3
add rsi, byte 4*SIZEOF_FAST_FLOAT ; wsptr
add rdi, byte 4*SIZEOF_JSAMPROW
dec rcx ; ctr
jnz near .rowloop
pop rbx
uncollect_args
mov rsp,rbp ; rsp <- aligned rbp
pop rsp ; rsp <- original rbp
pop rbp
ret
; For some reason, the OS X linker does not honor the request to align the
; segment unless we do this.
align 16
|
