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gerrit.omnirom.org / android_external_tigervnc / 598c2a5e2a2228b26e8059f23aa37b89f748e7d4 / . / common / jpeg / simd / jimmxred.asm
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Pierre Ossman3e0e2de2009-03-09 13:25:30 +0000[diff] [blame]1;
2; jimmxred.asm - reduced-size IDCT (MMX)
3;
4; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
5;
6; Based on
7; x86 SIMD extension for IJG JPEG library
8; Copyright (C) 1999-2006, MIYASAKA Masaru.
9; For conditions of distribution and use, see copyright notice in jsimdext.inc
10;
11; This file should be assembled with NASM (Netwide Assembler),
12; can *not* be assembled with Microsoft's MASM or any compatible
13; assembler (including Borland's Turbo Assembler).
14; NASM is available from http://nasm.sourceforge.net/ or
15; http://sourceforge.net/project/showfiles.php?group_id=6208
16;
17; This file contains inverse-DCT routines that produce reduced-size
18; output: either 4x4 or 2x2 pixels from an 8x8 DCT block.
19; The following code is based directly on the IJG's original jidctred.c;
20; see the jidctred.c for more details.
21;
22; [TAB8]
23
24%include "simd/jsimdext.inc"
25%include "simd/jdct.inc"
26
27; --------------------------------------------------------------------------
28
29%define CONST_BITS 13
30%define PASS1_BITS 2
31
32%define DESCALE_P1_4 (CONST_BITS-PASS1_BITS+1)
33%define DESCALE_P2_4 (CONST_BITS+PASS1_BITS+3+1)
34%define DESCALE_P1_2 (CONST_BITS-PASS1_BITS+2)
35%define DESCALE_P2_2 (CONST_BITS+PASS1_BITS+3+2)
36
37%if CONST_BITS == 13
38F_0_211 equ 1730 ; FIX(0.211164243)
39F_0_509 equ 4176 ; FIX(0.509795579)
40F_0_601 equ 4926 ; FIX(0.601344887)
41F_0_720 equ 5906 ; FIX(0.720959822)
42F_0_765 equ 6270 ; FIX(0.765366865)
43F_0_850 equ 6967 ; FIX(0.850430095)
44F_0_899 equ 7373 ; FIX(0.899976223)
45F_1_061 equ 8697 ; FIX(1.061594337)
46F_1_272 equ 10426 ; FIX(1.272758580)
47F_1_451 equ 11893 ; FIX(1.451774981)
48F_1_847 equ 15137 ; FIX(1.847759065)
49F_2_172 equ 17799 ; FIX(2.172734803)
50F_2_562 equ 20995 ; FIX(2.562915447)
51F_3_624 equ 29692 ; FIX(3.624509785)
52%else
53; NASM cannot do compile-time arithmetic on floating-point constants.
54%define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
55F_0_211 equ DESCALE( 226735879,30-CONST_BITS) ; FIX(0.211164243)
56F_0_509 equ DESCALE( 547388834,30-CONST_BITS) ; FIX(0.509795579)
57F_0_601 equ DESCALE( 645689155,30-CONST_BITS) ; FIX(0.601344887)
58F_0_720 equ DESCALE( 774124714,30-CONST_BITS) ; FIX(0.720959822)
59F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865)
60F_0_850 equ DESCALE( 913142361,30-CONST_BITS) ; FIX(0.850430095)
61F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223)
62F_1_061 equ DESCALE(1139878239,30-CONST_BITS) ; FIX(1.061594337)
63F_1_272 equ DESCALE(1366614119,30-CONST_BITS) ; FIX(1.272758580)
64F_1_451 equ DESCALE(1558831516,30-CONST_BITS) ; FIX(1.451774981)
65F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
66F_2_172 equ DESCALE(2332956230,30-CONST_BITS) ; FIX(2.172734803)
67F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447)
68F_3_624 equ DESCALE(3891787747,30-CONST_BITS) ; FIX(3.624509785)
69%endif
70
71; --------------------------------------------------------------------------
72 SECTION SEG_CONST
73
74 alignz 16
75 global EXTN(jconst_idct_red_mmx)
76
77EXTN(jconst_idct_red_mmx):
78
79PW_F184_MF076 times 2 dw F_1_847,-F_0_765
80PW_F256_F089 times 2 dw F_2_562, F_0_899
81PW_F106_MF217 times 2 dw F_1_061,-F_2_172
82PW_MF060_MF050 times 2 dw -F_0_601,-F_0_509
83PW_F145_MF021 times 2 dw F_1_451,-F_0_211
84PW_F362_MF127 times 2 dw F_3_624,-F_1_272
85PW_F085_MF072 times 2 dw F_0_850,-F_0_720
86PD_DESCALE_P1_4 times 2 dd 1 << (DESCALE_P1_4-1)
87PD_DESCALE_P2_4 times 2 dd 1 << (DESCALE_P2_4-1)
88PD_DESCALE_P1_2 times 2 dd 1 << (DESCALE_P1_2-1)
89PD_DESCALE_P2_2 times 2 dd 1 << (DESCALE_P2_2-1)
90PB_CENTERJSAMP times 8 db CENTERJSAMPLE
91
92 alignz 16
93
94; --------------------------------------------------------------------------
95 SECTION SEG_TEXT
96 BITS 32
97;
98; Perform dequantization and inverse DCT on one block of coefficients,
99; producing a reduced-size 4x4 output block.
100;
101; GLOBAL(void)
102; jsimd_idct_4x4_mmx (void * dct_table, JCOEFPTR coef_block,
103; JSAMPARRAY output_buf, JDIMENSION output_col)
104;
105
106%define dct_table(b) (b)+8 ; void * dct_table
107%define coef_block(b) (b)+12 ; JCOEFPTR coef_block
108%define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
109%define output_col(b) (b)+20 ; JDIMENSION output_col
110
111%define original_ebp ebp+0
112%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
113%define WK_NUM 2
114%define workspace wk(0)-DCTSIZE2*SIZEOF_JCOEF
115 ; JCOEF workspace[DCTSIZE2]
116
117 align 16
118 global EXTN(jsimd_idct_4x4_mmx)
119
120EXTN(jsimd_idct_4x4_mmx):
121 push ebp
122 mov eax,esp ; eax = original ebp
123 sub esp, byte 4
124 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
125 mov [esp],eax
126 mov ebp,esp ; ebp = aligned ebp
127 lea esp, [workspace]
128 pushpic ebx
129; push ecx ; need not be preserved
130; push edx ; need not be preserved
131 push esi
132 push edi
133
134 get_GOT ebx ; get GOT address
135
136 ; ---- Pass 1: process columns from input, store into work array.
137
138; mov eax, [original_ebp]
139 mov edx, POINTER [dct_table(eax)] ; quantptr
140 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
141 lea edi, [workspace] ; JCOEF * wsptr
142 mov ecx, DCTSIZE/4 ; ctr
143 alignx 16,7
144.columnloop:
145%ifndef NO_ZERO_COLUMN_TEST_4X4_MMX
146 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
147 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
148 jnz short .columnDCT
149
150 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
151 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
152 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
153 por mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
154 por mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
155 por mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
156 por mm0,mm1
157 packsswb mm0,mm0
158 movd eax,mm0
159 test eax,eax
160 jnz short .columnDCT
161
162 ; -- AC terms all zero
163
164 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
165 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
166
167 psllw mm0,PASS1_BITS
168
169 movq mm2,mm0 ; mm0=in0=(00 01 02 03)
170 punpcklwd mm0,mm0 ; mm0=(00 00 01 01)
171 punpckhwd mm2,mm2 ; mm2=(02 02 03 03)
172
173 movq mm1,mm0
174 punpckldq mm0,mm0 ; mm0=(00 00 00 00)
175 punpckhdq mm1,mm1 ; mm1=(01 01 01 01)
176 movq mm3,mm2
177 punpckldq mm2,mm2 ; mm2=(02 02 02 02)
178 punpckhdq mm3,mm3 ; mm3=(03 03 03 03)
179
180 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
181 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1
182 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2
183 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
184 jmp near .nextcolumn
185 alignx 16,7
186%endif
187.columnDCT:
188
189 ; -- Odd part
190
191 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
192 movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
193 pmullw mm0, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
194 pmullw mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
195 movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
196 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
197 pmullw mm2, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
198 pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
199
200 movq mm4,mm0
201 movq mm5,mm0
202 punpcklwd mm4,mm1
203 punpckhwd mm5,mm1
204 movq mm0,mm4
205 movq mm1,mm5
206 pmaddwd mm4,[GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L)
207 pmaddwd mm5,[GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H)
208 pmaddwd mm0,[GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L)
209 pmaddwd mm1,[GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H)
210
211 movq mm6,mm2
212 movq mm7,mm2
213 punpcklwd mm6,mm3
214 punpckhwd mm7,mm3
215 movq mm2,mm6
216 movq mm3,mm7
217 pmaddwd mm6,[GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L)
218 pmaddwd mm7,[GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H)
219 pmaddwd mm2,[GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L)
220 pmaddwd mm3,[GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H)
221
222 paddd mm6,mm4 ; mm6=tmp2L
223 paddd mm7,mm5 ; mm7=tmp2H
224 paddd mm2,mm0 ; mm2=tmp0L
225 paddd mm3,mm1 ; mm3=tmp0H
226
227 movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L
228 movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H
229
230 ; -- Even part
231
232 movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
233 movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
234 movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
235 pmullw mm4, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
236 pmullw mm5, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
237 pmullw mm0, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
238
239 pxor mm1,mm1
240 pxor mm2,mm2
241 punpcklwd mm1,mm4 ; mm1=tmp0L
242 punpckhwd mm2,mm4 ; mm2=tmp0H
243 psrad mm1,(16-CONST_BITS-1) ; psrad mm1,16 & pslld mm1,CONST_BITS+1
244 psrad mm2,(16-CONST_BITS-1) ; psrad mm2,16 & pslld mm2,CONST_BITS+1
245
246 movq mm3,mm5 ; mm5=in2=z2
247 punpcklwd mm5,mm0 ; mm0=in6=z3
248 punpckhwd mm3,mm0
249 pmaddwd mm5,[GOTOFF(ebx,PW_F184_MF076)] ; mm5=tmp2L
250 pmaddwd mm3,[GOTOFF(ebx,PW_F184_MF076)] ; mm3=tmp2H
251
252 movq mm4,mm1
253 movq mm0,mm2
254 paddd mm1,mm5 ; mm1=tmp10L
255 paddd mm2,mm3 ; mm2=tmp10H
256 psubd mm4,mm5 ; mm4=tmp12L
257 psubd mm0,mm3 ; mm0=tmp12H
258
259 ; -- Final output stage
260
261 movq mm5,mm1
262 movq mm3,mm2
263 paddd mm1,mm6 ; mm1=data0L
264 paddd mm2,mm7 ; mm2=data0H
265 psubd mm5,mm6 ; mm5=data3L
266 psubd mm3,mm7 ; mm3=data3H
267
268 movq mm6,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm6=[PD_DESCALE_P1_4]
269
270 paddd mm1,mm6
271 paddd mm2,mm6
272 psrad mm1,DESCALE_P1_4
273 psrad mm2,DESCALE_P1_4
274 paddd mm5,mm6
275 paddd mm3,mm6
276 psrad mm5,DESCALE_P1_4
277 psrad mm3,DESCALE_P1_4
278
279 packssdw mm1,mm2 ; mm1=data0=(00 01 02 03)
280 packssdw mm5,mm3 ; mm5=data3=(30 31 32 33)
281
282 movq mm7, MMWORD [wk(0)] ; mm7=tmp0L
283 movq mm6, MMWORD [wk(1)] ; mm6=tmp0H
284
285 movq mm2,mm4
286 movq mm3,mm0
287 paddd mm4,mm7 ; mm4=data1L
288 paddd mm0,mm6 ; mm0=data1H
289 psubd mm2,mm7 ; mm2=data2L
290 psubd mm3,mm6 ; mm3=data2H
291
292 movq mm7,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm7=[PD_DESCALE_P1_4]
293
294 paddd mm4,mm7
295 paddd mm0,mm7
296 psrad mm4,DESCALE_P1_4
297 psrad mm0,DESCALE_P1_4
298 paddd mm2,mm7
299 paddd mm3,mm7
300 psrad mm2,DESCALE_P1_4
301 psrad mm3,DESCALE_P1_4
302
303 packssdw mm4,mm0 ; mm4=data1=(10 11 12 13)
304 packssdw mm2,mm3 ; mm2=data2=(20 21 22 23)
305
306 movq mm6,mm1 ; transpose coefficients(phase 1)
307 punpcklwd mm1,mm4 ; mm1=(00 10 01 11)
308 punpckhwd mm6,mm4 ; mm6=(02 12 03 13)
309 movq mm7,mm2 ; transpose coefficients(phase 1)
310 punpcklwd mm2,mm5 ; mm2=(20 30 21 31)
311 punpckhwd mm7,mm5 ; mm7=(22 32 23 33)
312
313 movq mm0,mm1 ; transpose coefficients(phase 2)
314 punpckldq mm1,mm2 ; mm1=(00 10 20 30)
315 punpckhdq mm0,mm2 ; mm0=(01 11 21 31)
316 movq mm3,mm6 ; transpose coefficients(phase 2)
317 punpckldq mm6,mm7 ; mm6=(02 12 22 32)
318 punpckhdq mm3,mm7 ; mm3=(03 13 23 33)
319
320 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm1
321 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm0
322 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm6
323 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
324
325.nextcolumn:
326 add esi, byte 4*SIZEOF_JCOEF ; coef_block
327 add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr
328 add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr
329 dec ecx ; ctr
330 jnz near .columnloop
331
332 ; ---- Pass 2: process rows from work array, store into output array.
333
334 mov eax, [original_ebp]
335 lea esi, [workspace] ; JCOEF * wsptr
336 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
337 mov eax, JDIMENSION [output_col(eax)]
338
339 ; -- Odd part
340
341 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
342 movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
343 movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
344 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
345
346 movq mm4,mm0
347 movq mm5,mm0
348 punpcklwd mm4,mm1
349 punpckhwd mm5,mm1
350 movq mm0,mm4
351 movq mm1,mm5
352 pmaddwd mm4,[GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L)
353 pmaddwd mm5,[GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H)
354 pmaddwd mm0,[GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L)
355 pmaddwd mm1,[GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H)
356
357 movq mm6,mm2
358 movq mm7,mm2
359 punpcklwd mm6,mm3
360 punpckhwd mm7,mm3
361 movq mm2,mm6
362 movq mm3,mm7
363 pmaddwd mm6,[GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L)
364 pmaddwd mm7,[GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H)
365 pmaddwd mm2,[GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L)
366 pmaddwd mm3,[GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H)
367
368 paddd mm6,mm4 ; mm6=tmp2L
369 paddd mm7,mm5 ; mm7=tmp2H
370 paddd mm2,mm0 ; mm2=tmp0L
371 paddd mm3,mm1 ; mm3=tmp0H
372
373 movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L
374 movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H
375
376 ; -- Even part
377
378 movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
379 movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
380 movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
381
382 pxor mm1,mm1
383 pxor mm2,mm2
384 punpcklwd mm1,mm4 ; mm1=tmp0L
385 punpckhwd mm2,mm4 ; mm2=tmp0H
386 psrad mm1,(16-CONST_BITS-1) ; psrad mm1,16 & pslld mm1,CONST_BITS+1
387 psrad mm2,(16-CONST_BITS-1) ; psrad mm2,16 & pslld mm2,CONST_BITS+1
388
389 movq mm3,mm5 ; mm5=in2=z2
390 punpcklwd mm5,mm0 ; mm0=in6=z3
391 punpckhwd mm3,mm0
392 pmaddwd mm5,[GOTOFF(ebx,PW_F184_MF076)] ; mm5=tmp2L
393 pmaddwd mm3,[GOTOFF(ebx,PW_F184_MF076)] ; mm3=tmp2H
394
395 movq mm4,mm1
396 movq mm0,mm2
397 paddd mm1,mm5 ; mm1=tmp10L
398 paddd mm2,mm3 ; mm2=tmp10H
399 psubd mm4,mm5 ; mm4=tmp12L
400 psubd mm0,mm3 ; mm0=tmp12H
401
402 ; -- Final output stage
403
404 movq mm5,mm1
405 movq mm3,mm2
406 paddd mm1,mm6 ; mm1=data0L
407 paddd mm2,mm7 ; mm2=data0H
408 psubd mm5,mm6 ; mm5=data3L
409 psubd mm3,mm7 ; mm3=data3H
410
411 movq mm6,[GOTOFF(ebx,PD_DESCALE_P2_4)] ; mm6=[PD_DESCALE_P2_4]
412
413 paddd mm1,mm6
414 paddd mm2,mm6
415 psrad mm1,DESCALE_P2_4
416 psrad mm2,DESCALE_P2_4
417 paddd mm5,mm6
418 paddd mm3,mm6
419 psrad mm5,DESCALE_P2_4
420 psrad mm3,DESCALE_P2_4
421
422 packssdw mm1,mm2 ; mm1=data0=(00 10 20 30)
423 packssdw mm5,mm3 ; mm5=data3=(03 13 23 33)
424
425 movq mm7, MMWORD [wk(0)] ; mm7=tmp0L
426 movq mm6, MMWORD [wk(1)] ; mm6=tmp0H
427
428 movq mm2,mm4
429 movq mm3,mm0
430 paddd mm4,mm7 ; mm4=data1L
431 paddd mm0,mm6 ; mm0=data1H
432 psubd mm2,mm7 ; mm2=data2L
433 psubd mm3,mm6 ; mm3=data2H
434
435 movq mm7,[GOTOFF(ebx,PD_DESCALE_P2_4)] ; mm7=[PD_DESCALE_P2_4]
436
437 paddd mm4,mm7
438 paddd mm0,mm7
439 psrad mm4,DESCALE_P2_4
440 psrad mm0,DESCALE_P2_4
441 paddd mm2,mm7
442 paddd mm3,mm7
443 psrad mm2,DESCALE_P2_4
444 psrad mm3,DESCALE_P2_4
445
446 packssdw mm4,mm0 ; mm4=data1=(01 11 21 31)
447 packssdw mm2,mm3 ; mm2=data2=(02 12 22 32)
448
449 movq mm6,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP]
450
451 packsswb mm1,mm2 ; mm1=(00 10 20 30 02 12 22 32)
452 packsswb mm4,mm5 ; mm4=(01 11 21 31 03 13 23 33)
453 paddb mm1,mm6
454 paddb mm4,mm6
455
456 movq mm7,mm1 ; transpose coefficients(phase 1)
457 punpcklbw mm1,mm4 ; mm1=(00 01 10 11 20 21 30 31)
458 punpckhbw mm7,mm4 ; mm7=(02 03 12 13 22 23 32 33)
459
460 movq mm0,mm1 ; transpose coefficients(phase 2)
461 punpcklwd mm1,mm7 ; mm1=(00 01 02 03 10 11 12 13)
462 punpckhwd mm0,mm7 ; mm0=(20 21 22 23 30 31 32 33)
463
464 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
465 mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
466 movd DWORD [edx+eax*SIZEOF_JSAMPLE], mm1
467 movd DWORD [esi+eax*SIZEOF_JSAMPLE], mm0
468
469 psrlq mm1,4*BYTE_BIT
470 psrlq mm0,4*BYTE_BIT
471
472 mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
473 mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
474 movd DWORD [edx+eax*SIZEOF_JSAMPLE], mm1
475 movd DWORD [esi+eax*SIZEOF_JSAMPLE], mm0
476
477 emms ; empty MMX state
478
479 pop edi
480 pop esi
481; pop edx ; need not be preserved
482; pop ecx ; need not be preserved
483 poppic ebx
484 mov esp,ebp ; esp <- aligned ebp
485 pop esp ; esp <- original ebp
486 pop ebp
487 ret
488
489
490; --------------------------------------------------------------------------
491;
492; Perform dequantization and inverse DCT on one block of coefficients,
493; producing a reduced-size 2x2 output block.
494;
495; GLOBAL(void)
496; jsimd_idct_2x2_mmx (void * dct_table, JCOEFPTR coef_block,
497; JSAMPARRAY output_buf, JDIMENSION output_col)
498;
499
500%define dct_table(b) (b)+8 ; void * dct_table
501%define coef_block(b) (b)+12 ; JCOEFPTR coef_block
502%define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
503%define output_col(b) (b)+20 ; JDIMENSION output_col
504
505 align 16
506 global EXTN(jsimd_idct_2x2_mmx)
507
508EXTN(jsimd_idct_2x2_mmx):
509 push ebp
510 mov ebp,esp
511 push ebx
512; push ecx ; need not be preserved
513; push edx ; need not be preserved
514 push esi
515 push edi
516
517 get_GOT ebx ; get GOT address
518
519 ; ---- Pass 1: process columns from input.
520
521 mov edx, POINTER [dct_table(ebp)] ; quantptr
522 mov esi, JCOEFPTR [coef_block(ebp)] ; inptr
523
524 ; | input: | result: |
525 ; | 00 01 ** 03 ** 05 ** 07 | |
526 ; | 10 11 ** 13 ** 15 ** 17 | |
527 ; | ** ** ** ** ** ** ** ** | |
528 ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 |
529 ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 |
530 ; | 50 51 ** 53 ** 55 ** 57 | |
531 ; | ** ** ** ** ** ** ** ** | |
532 ; | 70 71 ** 73 ** 75 ** 77 | |
533
534 ; -- Odd part
535
536 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
537 movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
538 pmullw mm0, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
539 pmullw mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
540 movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
541 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
542 pmullw mm2, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
543 pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
544
545 ; mm0=(10 11 ** 13), mm1=(30 31 ** 33)
546 ; mm2=(50 51 ** 53), mm3=(70 71 ** 73)
547
548 pcmpeqd mm7,mm7
549 pslld mm7,WORD_BIT ; mm7={0x0000 0xFFFF 0x0000 0xFFFF}
550
551 movq mm4,mm0 ; mm4=(10 11 ** 13)
552 movq mm5,mm2 ; mm5=(50 51 ** 53)
553 punpcklwd mm4,mm1 ; mm4=(10 30 11 31)
554 punpcklwd mm5,mm3 ; mm5=(50 70 51 71)
555 pmaddwd mm4,[GOTOFF(ebx,PW_F362_MF127)]
556 pmaddwd mm5,[GOTOFF(ebx,PW_F085_MF072)]
557
558 psrld mm0,WORD_BIT ; mm0=(11 -- 13 --)
559 pand mm1,mm7 ; mm1=(-- 31 -- 33)
560 psrld mm2,WORD_BIT ; mm2=(51 -- 53 --)
561 pand mm3,mm7 ; mm3=(-- 71 -- 73)
562 por mm0,mm1 ; mm0=(11 31 13 33)
563 por mm2,mm3 ; mm2=(51 71 53 73)
564 pmaddwd mm0,[GOTOFF(ebx,PW_F362_MF127)]
565 pmaddwd mm2,[GOTOFF(ebx,PW_F085_MF072)]
566
567 paddd mm4,mm5 ; mm4=tmp0[col0 col1]
568
569 movq mm6, MMWORD [MMBLOCK(1,1,esi,SIZEOF_JCOEF)]
570 movq mm1, MMWORD [MMBLOCK(3,1,esi,SIZEOF_JCOEF)]
571 pmullw mm6, MMWORD [MMBLOCK(1,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
572 pmullw mm1, MMWORD [MMBLOCK(3,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
573 movq mm3, MMWORD [MMBLOCK(5,1,esi,SIZEOF_JCOEF)]
574 movq mm5, MMWORD [MMBLOCK(7,1,esi,SIZEOF_JCOEF)]
575 pmullw mm3, MMWORD [MMBLOCK(5,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
576 pmullw mm5, MMWORD [MMBLOCK(7,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
577
578 ; mm6=(** 15 ** 17), mm1=(** 35 ** 37)
579 ; mm3=(** 55 ** 57), mm5=(** 75 ** 77)
580
581 psrld mm6,WORD_BIT ; mm6=(15 -- 17 --)
582 pand mm1,mm7 ; mm1=(-- 35 -- 37)
583 psrld mm3,WORD_BIT ; mm3=(55 -- 57 --)
584 pand mm5,mm7 ; mm5=(-- 75 -- 77)
585 por mm6,mm1 ; mm6=(15 35 17 37)
586 por mm3,mm5 ; mm3=(55 75 57 77)
587 pmaddwd mm6,[GOTOFF(ebx,PW_F362_MF127)]
588 pmaddwd mm3,[GOTOFF(ebx,PW_F085_MF072)]
589
590 paddd mm0,mm2 ; mm0=tmp0[col1 col3]
591 paddd mm6,mm3 ; mm6=tmp0[col5 col7]
592
593 ; -- Even part
594
595 movq mm1, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
596 movq mm5, MMWORD [MMBLOCK(0,1,esi,SIZEOF_JCOEF)]
597 pmullw mm1, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
598 pmullw mm5, MMWORD [MMBLOCK(0,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
599
600 ; mm1=(00 01 ** 03), mm5=(** 05 ** 07)
601
602 movq mm2,mm1 ; mm2=(00 01 ** 03)
603 pslld mm1,WORD_BIT ; mm1=(-- 00 -- **)
604 psrad mm1,(WORD_BIT-CONST_BITS-2) ; mm1=tmp10[col0 ****]
605
606 pand mm2,mm7 ; mm2=(-- 01 -- 03)
607 pand mm5,mm7 ; mm5=(-- 05 -- 07)
608 psrad mm2,(WORD_BIT-CONST_BITS-2) ; mm2=tmp10[col1 col3]
609 psrad mm5,(WORD_BIT-CONST_BITS-2) ; mm5=tmp10[col5 col7]
610
611 ; -- Final output stage
612
613 movq mm3,mm1
614 paddd mm1,mm4 ; mm1=data0[col0 ****]=(A0 **)
615 psubd mm3,mm4 ; mm3=data1[col0 ****]=(B0 **)
616 punpckldq mm1,mm3 ; mm1=(A0 B0)
617
618 movq mm7,[GOTOFF(ebx,PD_DESCALE_P1_2)] ; mm7=[PD_DESCALE_P1_2]
619
620 movq mm4,mm2
621 movq mm3,mm5
622 paddd mm2,mm0 ; mm2=data0[col1 col3]=(A1 A3)
623 paddd mm5,mm6 ; mm5=data0[col5 col7]=(A5 A7)
624 psubd mm4,mm0 ; mm4=data1[col1 col3]=(B1 B3)
625 psubd mm3,mm6 ; mm3=data1[col5 col7]=(B5 B7)
626
627 paddd mm1,mm7
628 psrad mm1,DESCALE_P1_2
629
630 paddd mm2,mm7
631 paddd mm5,mm7
632 psrad mm2,DESCALE_P1_2
633 psrad mm5,DESCALE_P1_2
634 paddd mm4,mm7
635 paddd mm3,mm7
636 psrad mm4,DESCALE_P1_2
637 psrad mm3,DESCALE_P1_2
638
639 ; ---- Pass 2: process rows, store into output array.
640
641 mov edi, JSAMPARRAY [output_buf(ebp)] ; (JSAMPROW *)
642 mov eax, JDIMENSION [output_col(ebp)]
643
644 ; | input:| result:|
645 ; | A0 B0 | |
646 ; | A1 B1 | C0 C1 |
647 ; | A3 B3 | D0 D1 |
648 ; | A5 B5 | |
649 ; | A7 B7 | |
650
651 ; -- Odd part
652
653 packssdw mm2,mm4 ; mm2=(A1 A3 B1 B3)
654 packssdw mm5,mm3 ; mm5=(A5 A7 B5 B7)
655 pmaddwd mm2,[GOTOFF(ebx,PW_F362_MF127)]
656 pmaddwd mm5,[GOTOFF(ebx,PW_F085_MF072)]
657
658 paddd mm2,mm5 ; mm2=tmp0[row0 row1]
659
660 ; -- Even part
661
662 pslld mm1,(CONST_BITS+2) ; mm1=tmp10[row0 row1]
663
664 ; -- Final output stage
665
666 movq mm0,[GOTOFF(ebx,PD_DESCALE_P2_2)] ; mm0=[PD_DESCALE_P2_2]
667
668 movq mm6,mm1
669 paddd mm1,mm2 ; mm1=data0[row0 row1]=(C0 C1)
670 psubd mm6,mm2 ; mm6=data1[row0 row1]=(D0 D1)
671
672 paddd mm1,mm0
673 paddd mm6,mm0
674 psrad mm1,DESCALE_P2_2
675 psrad mm6,DESCALE_P2_2
676
677 movq mm7,mm1 ; transpose coefficients
678 punpckldq mm1,mm6 ; mm1=(C0 D0)
679 punpckhdq mm7,mm6 ; mm7=(C1 D1)
680
681 packssdw mm1,mm7 ; mm1=(C0 D0 C1 D1)
682 packsswb mm1,mm1 ; mm1=(C0 D0 C1 D1 C0 D0 C1 D1)
683 paddb mm1,[GOTOFF(ebx,PB_CENTERJSAMP)]
684
685 movd ecx,mm1
686 movd ebx,mm1 ; ebx=(C0 D0 C1 D1)
687 shr ecx,2*BYTE_BIT ; ecx=(C1 D1 -- --)
688
689 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
690 mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
691 mov WORD [edx+eax*SIZEOF_JSAMPLE], bx
692 mov WORD [esi+eax*SIZEOF_JSAMPLE], cx
693
694 emms ; empty MMX state
695
696 pop edi
697 pop esi
698; pop edx ; need not be preserved
699; pop ecx ; need not be preserved
700 pop ebx
701 pop ebp
702 ret
703