2 ; jidctint.asm - accurate integer IDCT (MMX)
4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
6 ; Based on the x86 SIMD extension for IJG JPEG library
7 ; Copyright (C) 1999-2006, MIYASAKA Masaru.
8 ; For conditions of distribution and use, see copyright notice in jsimdext.inc
10 ; This file should be assembled with NASM (Netwide Assembler),
11 ; can *not* be assembled with Microsoft's MASM or any compatible
12 ; assembler (including Borland's Turbo Assembler).
13 ; NASM is available from http://nasm.sourceforge.net/ or
14 ; http://sourceforge.net/project/showfiles.php?group_id=6208
16 ; This file contains a slow-but-accurate integer implementation of the
17 ; inverse DCT (Discrete Cosine Transform). The following code is based
18 ; directly on the IJG's original jidctint.c; see the jidctint.c for
23 %include "jsimdext.inc"
26 ; --------------------------------------------------------------------------
31 %define DESCALE_P1 (CONST_BITS-PASS1_BITS)
32 %define DESCALE_P2 (CONST_BITS+PASS1_BITS+3)
35 F_0_298 equ 2446 ; FIX(0.298631336)
36 F_0_390 equ 3196 ; FIX(0.390180644)
37 F_0_541 equ 4433 ; FIX(0.541196100)
38 F_0_765 equ 6270 ; FIX(0.765366865)
39 F_0_899 equ 7373 ; FIX(0.899976223)
40 F_1_175 equ 9633 ; FIX(1.175875602)
41 F_1_501 equ 12299 ; FIX(1.501321110)
42 F_1_847 equ 15137 ; FIX(1.847759065)
43 F_1_961 equ 16069 ; FIX(1.961570560)
44 F_2_053 equ 16819 ; FIX(2.053119869)
45 F_2_562 equ 20995 ; FIX(2.562915447)
46 F_3_072 equ 25172 ; FIX(3.072711026)
48 ; NASM cannot do compile-time arithmetic on floating-point constants.
49 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
50 F_0_298 equ DESCALE( 320652955,30-CONST_BITS) ; FIX(0.298631336)
51 F_0_390 equ DESCALE( 418953276,30-CONST_BITS) ; FIX(0.390180644)
52 F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100)
53 F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865)
54 F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223)
55 F_1_175 equ DESCALE(1262586813,30-CONST_BITS) ; FIX(1.175875602)
56 F_1_501 equ DESCALE(1612031267,30-CONST_BITS) ; FIX(1.501321110)
57 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
58 F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560)
59 F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869)
60 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447)
61 F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026)
64 ; --------------------------------------------------------------------------
68 global EXTN(jconst_idct_islow_mmx)
70 EXTN(jconst_idct_islow_mmx):
72 PW_F130_F054 times 2 dw (F_0_541+F_0_765), F_0_541
73 PW_F054_MF130 times 2 dw F_0_541, (F_0_541-F_1_847)
74 PW_MF078_F117 times 2 dw (F_1_175-F_1_961), F_1_175
75 PW_F117_F078 times 2 dw F_1_175, (F_1_175-F_0_390)
76 PW_MF060_MF089 times 2 dw (F_0_298-F_0_899),-F_0_899
77 PW_MF089_F060 times 2 dw -F_0_899, (F_1_501-F_0_899)
78 PW_MF050_MF256 times 2 dw (F_2_053-F_2_562),-F_2_562
79 PW_MF256_F050 times 2 dw -F_2_562, (F_3_072-F_2_562)
80 PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1-1)
81 PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2-1)
82 PB_CENTERJSAMP times 8 db CENTERJSAMPLE
86 ; --------------------------------------------------------------------------
90 ; Perform dequantization and inverse DCT on one block of coefficients.
93 ; jsimd_idct_islow_mmx (void *dct_table, JCOEFPTR coef_block,
94 ; JSAMPARRAY output_buf, JDIMENSION output_col)
97 %define dct_table(b) (b)+8 ; jpeg_component_info *compptr
98 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block
99 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
100 %define output_col(b) (b)+20 ; JDIMENSION output_col
102 %define original_ebp ebp+0
103 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
105 %define workspace wk(0)-DCTSIZE2*SIZEOF_JCOEF
106 ; JCOEF workspace[DCTSIZE2]
109 global EXTN(jsimd_idct_islow_mmx)
111 EXTN(jsimd_idct_islow_mmx):
113 mov eax,esp ; eax = original ebp
115 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
117 mov ebp,esp ; ebp = aligned ebp
120 ; push ecx ; need not be preserved
121 ; push edx ; need not be preserved
125 get_GOT ebx ; get GOT address
127 ; ---- Pass 1: process columns from input, store into work array.
129 ; mov eax, [original_ebp]
130 mov edx, POINTER [dct_table(eax)] ; quantptr
131 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
132 lea edi, [workspace] ; JCOEF *wsptr
133 mov ecx, DCTSIZE/4 ; ctr
136 %ifndef NO_ZERO_COLUMN_TEST_ISLOW_MMX
137 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
138 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
141 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
142 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
143 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
144 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
145 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
146 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
147 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
154 ; -- AC terms all zero
156 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
157 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
161 movq mm2,mm0 ; mm0=in0=(00 01 02 03)
162 punpcklwd mm0,mm0 ; mm0=(00 00 01 01)
163 punpckhwd mm2,mm2 ; mm2=(02 02 03 03)
166 punpckldq mm0,mm0 ; mm0=(00 00 00 00)
167 punpckhdq mm1,mm1 ; mm1=(01 01 01 01)
169 punpckldq mm2,mm2 ; mm2=(02 02 02 02)
170 punpckhdq mm3,mm3 ; mm3=(03 03 03 03)
172 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
173 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0
174 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1
175 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm1
176 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2
177 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm2
178 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
179 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm3
187 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
188 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
189 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
190 pmullw mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
191 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
192 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
193 pmullw mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
194 pmullw mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
197 ; z1 = (z2 + z3) * 0.541196100;
198 ; tmp2 = z1 + z3 * -1.847759065;
199 ; tmp3 = z1 + z2 * 0.765366865;
201 ; (This implementation)
202 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065);
203 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100;
205 movq mm4,mm1 ; mm1=in2=z2
207 punpcklwd mm4,mm3 ; mm3=in6=z3
211 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L
212 pmaddwd mm5,[GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H
213 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L
214 pmaddwd mm3,[GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H
217 paddw mm0,mm2 ; mm0=in0+in4
218 psubw mm6,mm2 ; mm6=in0-in4
222 punpcklwd mm7,mm0 ; mm7=tmp0L
223 punpckhwd mm2,mm0 ; mm2=tmp0H
224 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS
225 psrad mm2,(16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS
228 paddd mm7,mm4 ; mm7=tmp10L
229 psubd mm0,mm4 ; mm0=tmp13L
231 paddd mm2,mm5 ; mm2=tmp10H
232 psubd mm4,mm5 ; mm4=tmp13H
234 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L
235 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H
236 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L
237 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H
241 punpcklwd mm5,mm6 ; mm5=tmp1L
242 punpckhwd mm7,mm6 ; mm7=tmp1H
243 psrad mm5,(16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS
244 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS
247 paddd mm5,mm1 ; mm5=tmp11L
248 psubd mm2,mm1 ; mm2=tmp12L
250 paddd mm7,mm3 ; mm7=tmp11H
251 psubd mm0,mm3 ; mm0=tmp12H
253 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L
254 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H
255 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L
256 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H
260 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
261 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
262 pmullw mm4, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
263 pmullw mm6, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
264 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
265 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
266 pmullw mm1, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
267 pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
271 paddw mm5,mm3 ; mm5=z3
272 paddw mm7,mm1 ; mm7=z4
275 ; z5 = (z3 + z4) * 1.175875602;
276 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;
277 ; z3 += z5; z4 += z5;
279 ; (This implementation)
280 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;
281 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);
289 pmaddwd mm2,[GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L
290 pmaddwd mm0,[GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H
291 pmaddwd mm5,[GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L
292 pmaddwd mm7,[GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H
294 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L
295 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H
298 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2;
299 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869;
300 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110;
301 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
302 ; tmp0 += z1 + z3; tmp1 += z2 + z4;
303 ; tmp2 += z2 + z3; tmp3 += z1 + z4;
305 ; (This implementation)
306 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223;
307 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447;
308 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447);
309 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223);
310 ; tmp0 += z3; tmp1 += z4;
311 ; tmp2 += z3; tmp3 += z4;
319 pmaddwd mm2,[GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L
320 pmaddwd mm0,[GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H
321 pmaddwd mm3,[GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L
322 pmaddwd mm4,[GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H
324 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L
325 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H
326 paddd mm3,mm5 ; mm3=tmp3L
327 paddd mm4,mm7 ; mm4=tmp3H
329 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L
330 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H
338 pmaddwd mm2,[GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L
339 pmaddwd mm0,[GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H
340 pmaddwd mm1,[GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L
341 pmaddwd mm6,[GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H
343 paddd mm2,mm5 ; mm2=tmp1L
344 paddd mm0,mm7 ; mm0=tmp1H
345 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L
346 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H
348 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L
349 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H
351 ; -- Final output stage
353 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L
354 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H
358 paddd mm5,mm3 ; mm5=data0L
359 paddd mm7,mm4 ; mm7=data0H
360 psubd mm2,mm3 ; mm2=data7L
361 psubd mm0,mm4 ; mm0=data7H
363 movq mm3,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm3=[PD_DESCALE_P1]
374 packssdw mm5,mm7 ; mm5=data0=(00 01 02 03)
375 packssdw mm2,mm0 ; mm2=data7=(70 71 72 73)
377 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L
378 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H
382 paddd mm4,mm1 ; mm4=data1L
383 paddd mm3,mm6 ; mm3=data1H
384 psubd mm7,mm1 ; mm7=data6L
385 psubd mm0,mm6 ; mm0=data6H
387 movq mm1,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm1=[PD_DESCALE_P1]
398 packssdw mm4,mm3 ; mm4=data1=(10 11 12 13)
399 packssdw mm7,mm0 ; mm7=data6=(60 61 62 63)
401 movq mm6,mm5 ; transpose coefficients(phase 1)
402 punpcklwd mm5,mm4 ; mm5=(00 10 01 11)
403 punpckhwd mm6,mm4 ; mm6=(02 12 03 13)
404 movq mm1,mm7 ; transpose coefficients(phase 1)
405 punpcklwd mm7,mm2 ; mm7=(60 70 61 71)
406 punpckhwd mm1,mm2 ; mm1=(62 72 63 73)
408 movq mm3, MMWORD [wk(6)] ; mm3=tmp12L
409 movq mm0, MMWORD [wk(7)] ; mm0=tmp12H
410 movq mm4, MMWORD [wk(10)] ; mm4=tmp1L
411 movq mm2, MMWORD [wk(11)] ; mm2=tmp1H
413 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 01 11)
414 movq MMWORD [wk(1)], mm6 ; wk(1)=(02 12 03 13)
415 movq MMWORD [wk(4)], mm7 ; wk(4)=(60 70 61 71)
416 movq MMWORD [wk(5)], mm1 ; wk(5)=(62 72 63 73)
420 paddd mm3,mm4 ; mm3=data2L
421 paddd mm0,mm2 ; mm0=data2H
422 psubd mm5,mm4 ; mm5=data5L
423 psubd mm6,mm2 ; mm6=data5H
425 movq mm7,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm7=[PD_DESCALE_P1]
436 packssdw mm3,mm0 ; mm3=data2=(20 21 22 23)
437 packssdw mm5,mm6 ; mm5=data5=(50 51 52 53)
439 movq mm1, MMWORD [wk(2)] ; mm1=tmp13L
440 movq mm4, MMWORD [wk(3)] ; mm4=tmp13H
441 movq mm2, MMWORD [wk(8)] ; mm2=tmp0L
442 movq mm7, MMWORD [wk(9)] ; mm7=tmp0H
446 paddd mm1,mm2 ; mm1=data3L
447 paddd mm4,mm7 ; mm4=data3H
448 psubd mm0,mm2 ; mm0=data4L
449 psubd mm6,mm7 ; mm6=data4H
451 movq mm2,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm2=[PD_DESCALE_P1]
462 packssdw mm1,mm4 ; mm1=data3=(30 31 32 33)
463 packssdw mm0,mm6 ; mm0=data4=(40 41 42 43)
465 movq mm7, MMWORD [wk(0)] ; mm7=(00 10 01 11)
466 movq mm2, MMWORD [wk(1)] ; mm2=(02 12 03 13)
468 movq mm4,mm3 ; transpose coefficients(phase 1)
469 punpcklwd mm3,mm1 ; mm3=(20 30 21 31)
470 punpckhwd mm4,mm1 ; mm4=(22 32 23 33)
471 movq mm6,mm0 ; transpose coefficients(phase 1)
472 punpcklwd mm0,mm5 ; mm0=(40 50 41 51)
473 punpckhwd mm6,mm5 ; mm6=(42 52 43 53)
475 movq mm1,mm7 ; transpose coefficients(phase 2)
476 punpckldq mm7,mm3 ; mm7=(00 10 20 30)
477 punpckhdq mm1,mm3 ; mm1=(01 11 21 31)
478 movq mm5,mm2 ; transpose coefficients(phase 2)
479 punpckldq mm2,mm4 ; mm2=(02 12 22 32)
480 punpckhdq mm5,mm4 ; mm5=(03 13 23 33)
482 movq mm3, MMWORD [wk(4)] ; mm3=(60 70 61 71)
483 movq mm4, MMWORD [wk(5)] ; mm4=(62 72 63 73)
485 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm7
486 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1
487 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2
488 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm5
490 movq mm7,mm0 ; transpose coefficients(phase 2)
491 punpckldq mm0,mm3 ; mm0=(40 50 60 70)
492 punpckhdq mm7,mm3 ; mm7=(41 51 61 71)
493 movq mm1,mm6 ; transpose coefficients(phase 2)
494 punpckldq mm6,mm4 ; mm6=(42 52 62 72)
495 punpckhdq mm1,mm4 ; mm1=(43 53 63 73)
497 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0
498 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm7
499 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm6
500 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm1
503 add esi, byte 4*SIZEOF_JCOEF ; coef_block
504 add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr
505 add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr
509 ; ---- Pass 2: process rows from work array, store into output array.
511 mov eax, [original_ebp]
512 lea esi, [workspace] ; JCOEF *wsptr
513 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
514 mov eax, JDIMENSION [output_col(eax)]
515 mov ecx, DCTSIZE/4 ; ctr
521 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
522 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
523 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
524 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
527 ; z1 = (z2 + z3) * 0.541196100;
528 ; tmp2 = z1 + z3 * -1.847759065;
529 ; tmp3 = z1 + z2 * 0.765366865;
531 ; (This implementation)
532 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065);
533 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100;
535 movq mm4,mm1 ; mm1=in2=z2
537 punpcklwd mm4,mm3 ; mm3=in6=z3
541 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L
542 pmaddwd mm5,[GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H
543 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L
544 pmaddwd mm3,[GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H
547 paddw mm0,mm2 ; mm0=in0+in4
548 psubw mm6,mm2 ; mm6=in0-in4
552 punpcklwd mm7,mm0 ; mm7=tmp0L
553 punpckhwd mm2,mm0 ; mm2=tmp0H
554 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS
555 psrad mm2,(16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS
558 paddd mm7,mm4 ; mm7=tmp10L
559 psubd mm0,mm4 ; mm0=tmp13L
561 paddd mm2,mm5 ; mm2=tmp10H
562 psubd mm4,mm5 ; mm4=tmp13H
564 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L
565 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H
566 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L
567 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H
571 punpcklwd mm5,mm6 ; mm5=tmp1L
572 punpckhwd mm7,mm6 ; mm7=tmp1H
573 psrad mm5,(16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS
574 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS
577 paddd mm5,mm1 ; mm5=tmp11L
578 psubd mm2,mm1 ; mm2=tmp12L
580 paddd mm7,mm3 ; mm7=tmp11H
581 psubd mm0,mm3 ; mm0=tmp12H
583 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L
584 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H
585 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L
586 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H
590 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
591 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
592 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
593 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
597 paddw mm5,mm3 ; mm5=z3
598 paddw mm7,mm1 ; mm7=z4
601 ; z5 = (z3 + z4) * 1.175875602;
602 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;
603 ; z3 += z5; z4 += z5;
605 ; (This implementation)
606 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;
607 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);
615 pmaddwd mm2,[GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L
616 pmaddwd mm0,[GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H
617 pmaddwd mm5,[GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L
618 pmaddwd mm7,[GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H
620 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L
621 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H
624 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2;
625 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869;
626 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110;
627 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
628 ; tmp0 += z1 + z3; tmp1 += z2 + z4;
629 ; tmp2 += z2 + z3; tmp3 += z1 + z4;
631 ; (This implementation)
632 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223;
633 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447;
634 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447);
635 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223);
636 ; tmp0 += z3; tmp1 += z4;
637 ; tmp2 += z3; tmp3 += z4;
645 pmaddwd mm2,[GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L
646 pmaddwd mm0,[GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H
647 pmaddwd mm3,[GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L
648 pmaddwd mm4,[GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H
650 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L
651 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H
652 paddd mm3,mm5 ; mm3=tmp3L
653 paddd mm4,mm7 ; mm4=tmp3H
655 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L
656 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H
664 pmaddwd mm2,[GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L
665 pmaddwd mm0,[GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H
666 pmaddwd mm1,[GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L
667 pmaddwd mm6,[GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H
669 paddd mm2,mm5 ; mm2=tmp1L
670 paddd mm0,mm7 ; mm0=tmp1H
671 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L
672 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H
674 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L
675 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H
677 ; -- Final output stage
679 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L
680 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H
684 paddd mm5,mm3 ; mm5=data0L
685 paddd mm7,mm4 ; mm7=data0H
686 psubd mm2,mm3 ; mm2=data7L
687 psubd mm0,mm4 ; mm0=data7H
689 movq mm3,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm3=[PD_DESCALE_P2]
700 packssdw mm5,mm7 ; mm5=data0=(00 10 20 30)
701 packssdw mm2,mm0 ; mm2=data7=(07 17 27 37)
703 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L
704 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H
708 paddd mm4,mm1 ; mm4=data1L
709 paddd mm3,mm6 ; mm3=data1H
710 psubd mm7,mm1 ; mm7=data6L
711 psubd mm0,mm6 ; mm0=data6H
713 movq mm1,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm1=[PD_DESCALE_P2]
724 packssdw mm4,mm3 ; mm4=data1=(01 11 21 31)
725 packssdw mm7,mm0 ; mm7=data6=(06 16 26 36)
727 packsswb mm5,mm7 ; mm5=(00 10 20 30 06 16 26 36)
728 packsswb mm4,mm2 ; mm4=(01 11 21 31 07 17 27 37)
730 movq mm6, MMWORD [wk(6)] ; mm6=tmp12L
731 movq mm1, MMWORD [wk(7)] ; mm1=tmp12H
732 movq mm3, MMWORD [wk(10)] ; mm3=tmp1L
733 movq mm0, MMWORD [wk(11)] ; mm0=tmp1H
735 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 20 30 06 16 26 36)
736 movq MMWORD [wk(1)], mm4 ; wk(1)=(01 11 21 31 07 17 27 37)
740 paddd mm6,mm3 ; mm6=data2L
741 paddd mm1,mm0 ; mm1=data2H
742 psubd mm7,mm3 ; mm7=data5L
743 psubd mm2,mm0 ; mm2=data5H
745 movq mm5,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm5=[PD_DESCALE_P2]
756 packssdw mm6,mm1 ; mm6=data2=(02 12 22 32)
757 packssdw mm7,mm2 ; mm7=data5=(05 15 25 35)
759 movq mm4, MMWORD [wk(2)] ; mm4=tmp13L
760 movq mm3, MMWORD [wk(3)] ; mm3=tmp13H
761 movq mm0, MMWORD [wk(8)] ; mm0=tmp0L
762 movq mm5, MMWORD [wk(9)] ; mm5=tmp0H
766 paddd mm4,mm0 ; mm4=data3L
767 paddd mm3,mm5 ; mm3=data3H
768 psubd mm1,mm0 ; mm1=data4L
769 psubd mm2,mm5 ; mm2=data4H
771 movq mm0,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm0=[PD_DESCALE_P2]
782 movq mm5,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm5=[PB_CENTERJSAMP]
784 packssdw mm4,mm3 ; mm4=data3=(03 13 23 33)
785 packssdw mm1,mm2 ; mm1=data4=(04 14 24 34)
787 movq mm0, MMWORD [wk(0)] ; mm0=(00 10 20 30 06 16 26 36)
788 movq mm3, MMWORD [wk(1)] ; mm3=(01 11 21 31 07 17 27 37)
790 packsswb mm6,mm1 ; mm6=(02 12 22 32 04 14 24 34)
791 packsswb mm4,mm7 ; mm4=(03 13 23 33 05 15 25 35)
798 movq mm2,mm0 ; transpose coefficients(phase 1)
799 punpcklbw mm0,mm3 ; mm0=(00 01 10 11 20 21 30 31)
800 punpckhbw mm2,mm3 ; mm2=(06 07 16 17 26 27 36 37)
801 movq mm1,mm6 ; transpose coefficients(phase 1)
802 punpcklbw mm6,mm4 ; mm6=(02 03 12 13 22 23 32 33)
803 punpckhbw mm1,mm4 ; mm1=(04 05 14 15 24 25 34 35)
805 movq mm7,mm0 ; transpose coefficients(phase 2)
806 punpcklwd mm0,mm6 ; mm0=(00 01 02 03 10 11 12 13)
807 punpckhwd mm7,mm6 ; mm7=(20 21 22 23 30 31 32 33)
808 movq mm5,mm1 ; transpose coefficients(phase 2)
809 punpcklwd mm1,mm2 ; mm1=(04 05 06 07 14 15 16 17)
810 punpckhwd mm5,mm2 ; mm5=(24 25 26 27 34 35 36 37)
812 movq mm3,mm0 ; transpose coefficients(phase 3)
813 punpckldq mm0,mm1 ; mm0=(00 01 02 03 04 05 06 07)
814 punpckhdq mm3,mm1 ; mm3=(10 11 12 13 14 15 16 17)
815 movq mm4,mm7 ; transpose coefficients(phase 3)
816 punpckldq mm7,mm5 ; mm7=(20 21 22 23 24 25 26 27)
817 punpckhdq mm4,mm5 ; mm4=(30 31 32 33 34 35 36 37)
819 pushpic ebx ; save GOT address
821 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
822 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
823 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0
824 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm3
825 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
826 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
827 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm7
828 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4
830 poppic ebx ; restore GOT address
832 add esi, byte 4*SIZEOF_JCOEF ; wsptr
833 add edi, byte 4*SIZEOF_JSAMPROW
837 emms ; empty MMX state
841 ; pop edx ; need not be preserved
842 ; pop ecx ; need not be preserved
844 mov esp,ebp ; esp <- aligned ebp
845 pop esp ; esp <- original ebp
849 ; For some reason, the OS X linker does not honor the request to align the
850 ; segment unless we do this.