2 ; jidctfst.asm - fast integer IDCT (SSE2)
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 fast, not so accurate integer implementation of
17 ; the inverse DCT (Discrete Cosine Transform). The following code is
18 ; based directly on the IJG's original jidctfst.c; see the jidctfst.c
23 %include "jsimdext.inc"
26 ; --------------------------------------------------------------------------
28 %define CONST_BITS 8 ; 14 is also OK.
31 %if IFAST_SCALE_BITS != PASS1_BITS
32 %error "'IFAST_SCALE_BITS' must be equal to 'PASS1_BITS'."
36 F_1_082 equ 277 ; FIX(1.082392200)
37 F_1_414 equ 362 ; FIX(1.414213562)
38 F_1_847 equ 473 ; FIX(1.847759065)
39 F_2_613 equ 669 ; FIX(2.613125930)
40 F_1_613 equ (F_2_613 - 256) ; FIX(2.613125930) - FIX(1)
42 ; NASM cannot do compile-time arithmetic on floating-point constants.
43 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
44 F_1_082 equ DESCALE(1162209775,30-CONST_BITS) ; FIX(1.082392200)
45 F_1_414 equ DESCALE(1518500249,30-CONST_BITS) ; FIX(1.414213562)
46 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
47 F_2_613 equ DESCALE(2805822602,30-CONST_BITS) ; FIX(2.613125930)
48 F_1_613 equ (F_2_613 - (1 << CONST_BITS)) ; FIX(2.613125930) - FIX(1)
51 ; --------------------------------------------------------------------------
54 ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow)
55 ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw)
57 %define PRE_MULTIPLY_SCALE_BITS 2
58 %define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
61 global EXTN(jconst_idct_ifast_sse2)
63 EXTN(jconst_idct_ifast_sse2):
65 PW_F1414 times 8 dw F_1_414 << CONST_SHIFT
66 PW_F1847 times 8 dw F_1_847 << CONST_SHIFT
67 PW_MF1613 times 8 dw -F_1_613 << CONST_SHIFT
68 PW_F1082 times 8 dw F_1_082 << CONST_SHIFT
69 PB_CENTERJSAMP times 16 db CENTERJSAMPLE
73 ; --------------------------------------------------------------------------
77 ; Perform dequantization and inverse DCT on one block of coefficients.
80 ; jsimd_idct_ifast_sse2 (void *dct_table, JCOEFPTR coef_block,
81 ; JSAMPARRAY output_buf, JDIMENSION output_col)
84 %define dct_table(b) (b)+8 ; jpeg_component_info *compptr
85 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block
86 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
87 %define output_col(b) (b)+20 ; JDIMENSION output_col
89 %define original_ebp ebp+0
90 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
94 global EXTN(jsimd_idct_ifast_sse2)
96 EXTN(jsimd_idct_ifast_sse2):
98 mov eax,esp ; eax = original ebp
100 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
102 mov ebp,esp ; ebp = aligned ebp
106 ; push edx ; need not be preserved
110 get_GOT ebx ; get GOT address
112 ; ---- Pass 1: process columns from input.
114 ; mov eax, [original_ebp]
115 mov edx, POINTER [dct_table(eax)] ; quantptr
116 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
118 %ifndef NO_ZERO_COLUMN_TEST_IFAST_SSE2
119 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
120 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
123 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
124 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
125 por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
126 por xmm1, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
127 por xmm0, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
128 por xmm1, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
129 por xmm0, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
137 ; -- AC terms all zero
139 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
140 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
142 movdqa xmm7,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07)
143 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
144 punpckhwd xmm7,xmm7 ; xmm7=(04 04 05 05 06 06 07 07)
146 pshufd xmm6,xmm0,0x00 ; xmm6=col0=(00 00 00 00 00 00 00 00)
147 pshufd xmm2,xmm0,0x55 ; xmm2=col1=(01 01 01 01 01 01 01 01)
148 pshufd xmm5,xmm0,0xAA ; xmm5=col2=(02 02 02 02 02 02 02 02)
149 pshufd xmm0,xmm0,0xFF ; xmm0=col3=(03 03 03 03 03 03 03 03)
150 pshufd xmm1,xmm7,0x00 ; xmm1=col4=(04 04 04 04 04 04 04 04)
151 pshufd xmm4,xmm7,0x55 ; xmm4=col5=(05 05 05 05 05 05 05 05)
152 pshufd xmm3,xmm7,0xAA ; xmm3=col6=(06 06 06 06 06 06 06 06)
153 pshufd xmm7,xmm7,0xFF ; xmm7=col7=(07 07 07 07 07 07 07 07)
155 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=col1
156 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=col3
164 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
165 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
166 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_IFAST_MULT_TYPE)]
167 pmullw xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_IFAST_MULT_TYPE)]
168 movdqa xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
169 movdqa xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
170 pmullw xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_IFAST_MULT_TYPE)]
171 pmullw xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_IFAST_MULT_TYPE)]
175 psubw xmm0,xmm2 ; xmm0=tmp11
177 paddw xmm4,xmm2 ; xmm4=tmp10
178 paddw xmm5,xmm3 ; xmm5=tmp13
180 psllw xmm1,PRE_MULTIPLY_SCALE_BITS
181 pmulhw xmm1,[GOTOFF(ebx,PW_F1414)]
182 psubw xmm1,xmm5 ; xmm1=tmp12
186 psubw xmm4,xmm5 ; xmm4=tmp3
187 psubw xmm0,xmm1 ; xmm0=tmp2
188 paddw xmm6,xmm5 ; xmm6=tmp0
189 paddw xmm7,xmm1 ; xmm7=tmp1
191 movdqa XMMWORD [wk(1)], xmm4 ; wk(1)=tmp3
192 movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=tmp2
196 movdqa xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
197 movdqa xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
198 pmullw xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_IFAST_MULT_TYPE)]
199 pmullw xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_IFAST_MULT_TYPE)]
200 movdqa xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
201 movdqa xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
202 pmullw xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_IFAST_MULT_TYPE)]
203 pmullw xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_IFAST_MULT_TYPE)]
207 psubw xmm2,xmm1 ; xmm2=z12
208 psubw xmm5,xmm3 ; xmm5=z10
209 paddw xmm4,xmm1 ; xmm4=z11
210 paddw xmm0,xmm3 ; xmm0=z13
212 movdqa xmm1,xmm5 ; xmm1=z10(unscaled)
213 psllw xmm2,PRE_MULTIPLY_SCALE_BITS
214 psllw xmm5,PRE_MULTIPLY_SCALE_BITS
218 paddw xmm3,xmm0 ; xmm3=tmp7
220 psllw xmm4,PRE_MULTIPLY_SCALE_BITS
221 pmulhw xmm4,[GOTOFF(ebx,PW_F1414)] ; xmm4=tmp11
223 ; To avoid overflow...
226 ; tmp12 = -2.613125930 * z10 + z5;
228 ; (This implementation)
229 ; tmp12 = (-1.613125930 - 1) * z10 + z5;
230 ; = -1.613125930 * z10 - z10 + z5;
234 pmulhw xmm5,[GOTOFF(ebx,PW_F1847)] ; xmm5=z5
235 pmulhw xmm0,[GOTOFF(ebx,PW_MF1613)]
236 pmulhw xmm2,[GOTOFF(ebx,PW_F1082)]
238 psubw xmm2,xmm5 ; xmm2=tmp10
239 paddw xmm0,xmm5 ; xmm0=tmp12
241 ; -- Final output stage
243 psubw xmm0,xmm3 ; xmm0=tmp6
246 paddw xmm6,xmm3 ; xmm6=data0=(00 01 02 03 04 05 06 07)
247 paddw xmm7,xmm0 ; xmm7=data1=(10 11 12 13 14 15 16 17)
248 psubw xmm1,xmm3 ; xmm1=data7=(70 71 72 73 74 75 76 77)
249 psubw xmm5,xmm0 ; xmm5=data6=(60 61 62 63 64 65 66 67)
250 psubw xmm4,xmm0 ; xmm4=tmp5
252 movdqa xmm3,xmm6 ; transpose coefficients(phase 1)
253 punpcklwd xmm6,xmm7 ; xmm6=(00 10 01 11 02 12 03 13)
254 punpckhwd xmm3,xmm7 ; xmm3=(04 14 05 15 06 16 07 17)
255 movdqa xmm0,xmm5 ; transpose coefficients(phase 1)
256 punpcklwd xmm5,xmm1 ; xmm5=(60 70 61 71 62 72 63 73)
257 punpckhwd xmm0,xmm1 ; xmm0=(64 74 65 75 66 76 67 77)
259 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
260 movdqa xmm1, XMMWORD [wk(1)] ; xmm1=tmp3
262 movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(60 70 61 71 62 72 63 73)
263 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(64 74 65 75 66 76 67 77)
265 paddw xmm2,xmm4 ; xmm2=tmp4
268 paddw xmm7,xmm4 ; xmm7=data2=(20 21 22 23 24 25 26 27)
269 paddw xmm1,xmm2 ; xmm1=data4=(40 41 42 43 44 45 46 47)
270 psubw xmm5,xmm4 ; xmm5=data5=(50 51 52 53 54 55 56 57)
271 psubw xmm0,xmm2 ; xmm0=data3=(30 31 32 33 34 35 36 37)
273 movdqa xmm4,xmm7 ; transpose coefficients(phase 1)
274 punpcklwd xmm7,xmm0 ; xmm7=(20 30 21 31 22 32 23 33)
275 punpckhwd xmm4,xmm0 ; xmm4=(24 34 25 35 26 36 27 37)
276 movdqa xmm2,xmm1 ; transpose coefficients(phase 1)
277 punpcklwd xmm1,xmm5 ; xmm1=(40 50 41 51 42 52 43 53)
278 punpckhwd xmm2,xmm5 ; xmm2=(44 54 45 55 46 56 47 57)
280 movdqa xmm0,xmm3 ; transpose coefficients(phase 2)
281 punpckldq xmm3,xmm4 ; xmm3=(04 14 24 34 05 15 25 35)
282 punpckhdq xmm0,xmm4 ; xmm0=(06 16 26 36 07 17 27 37)
283 movdqa xmm5,xmm6 ; transpose coefficients(phase 2)
284 punpckldq xmm6,xmm7 ; xmm6=(00 10 20 30 01 11 21 31)
285 punpckhdq xmm5,xmm7 ; xmm5=(02 12 22 32 03 13 23 33)
287 movdqa xmm4, XMMWORD [wk(0)] ; xmm4=(60 70 61 71 62 72 63 73)
288 movdqa xmm7, XMMWORD [wk(1)] ; xmm7=(64 74 65 75 66 76 67 77)
290 movdqa XMMWORD [wk(0)], xmm3 ; wk(0)=(04 14 24 34 05 15 25 35)
291 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(06 16 26 36 07 17 27 37)
293 movdqa xmm3,xmm1 ; transpose coefficients(phase 2)
294 punpckldq xmm1,xmm4 ; xmm1=(40 50 60 70 41 51 61 71)
295 punpckhdq xmm3,xmm4 ; xmm3=(42 52 62 72 43 53 63 73)
296 movdqa xmm0,xmm2 ; transpose coefficients(phase 2)
297 punpckldq xmm2,xmm7 ; xmm2=(44 54 64 74 45 55 65 75)
298 punpckhdq xmm0,xmm7 ; xmm0=(46 56 66 76 47 57 67 77)
300 movdqa xmm4,xmm6 ; transpose coefficients(phase 3)
301 punpcklqdq xmm6,xmm1 ; xmm6=col0=(00 10 20 30 40 50 60 70)
302 punpckhqdq xmm4,xmm1 ; xmm4=col1=(01 11 21 31 41 51 61 71)
303 movdqa xmm7,xmm5 ; transpose coefficients(phase 3)
304 punpcklqdq xmm5,xmm3 ; xmm5=col2=(02 12 22 32 42 52 62 72)
305 punpckhqdq xmm7,xmm3 ; xmm7=col3=(03 13 23 33 43 53 63 73)
307 movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(04 14 24 34 05 15 25 35)
308 movdqa xmm3, XMMWORD [wk(1)] ; xmm3=(06 16 26 36 07 17 27 37)
310 movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=col1
311 movdqa XMMWORD [wk(1)], xmm7 ; wk(1)=col3
313 movdqa xmm4,xmm1 ; transpose coefficients(phase 3)
314 punpcklqdq xmm1,xmm2 ; xmm1=col4=(04 14 24 34 44 54 64 74)
315 punpckhqdq xmm4,xmm2 ; xmm4=col5=(05 15 25 35 45 55 65 75)
316 movdqa xmm7,xmm3 ; transpose coefficients(phase 3)
317 punpcklqdq xmm3,xmm0 ; xmm3=col6=(06 16 26 36 46 56 66 76)
318 punpckhqdq xmm7,xmm0 ; xmm7=col7=(07 17 27 37 47 57 67 77)
321 ; -- Prefetch the next coefficient block
323 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
324 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
325 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
326 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
328 ; ---- Pass 2: process rows from work array, store into output array.
330 mov eax, [original_ebp]
331 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
332 mov eax, JDIMENSION [output_col(eax)]
336 ; xmm6=col0, xmm5=col2, xmm1=col4, xmm3=col6
340 psubw xmm6,xmm1 ; xmm6=tmp11
342 paddw xmm2,xmm1 ; xmm2=tmp10
343 paddw xmm0,xmm3 ; xmm0=tmp13
345 psllw xmm5,PRE_MULTIPLY_SCALE_BITS
346 pmulhw xmm5,[GOTOFF(ebx,PW_F1414)]
347 psubw xmm5,xmm0 ; xmm5=tmp12
351 psubw xmm2,xmm0 ; xmm2=tmp3
352 psubw xmm6,xmm5 ; xmm6=tmp2
353 paddw xmm1,xmm0 ; xmm1=tmp0
354 paddw xmm3,xmm5 ; xmm3=tmp1
356 movdqa xmm0, XMMWORD [wk(0)] ; xmm0=col1
357 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=col3
359 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp3
360 movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=tmp2
364 ; xmm0=col1, xmm5=col3, xmm4=col5, xmm7=col7
368 psubw xmm0,xmm7 ; xmm0=z12
369 psubw xmm4,xmm5 ; xmm4=z10
370 paddw xmm2,xmm7 ; xmm2=z11
371 paddw xmm6,xmm5 ; xmm6=z13
373 movdqa xmm7,xmm4 ; xmm7=z10(unscaled)
374 psllw xmm0,PRE_MULTIPLY_SCALE_BITS
375 psllw xmm4,PRE_MULTIPLY_SCALE_BITS
379 paddw xmm5,xmm6 ; xmm5=tmp7
381 psllw xmm2,PRE_MULTIPLY_SCALE_BITS
382 pmulhw xmm2,[GOTOFF(ebx,PW_F1414)] ; xmm2=tmp11
384 ; To avoid overflow...
387 ; tmp12 = -2.613125930 * z10 + z5;
389 ; (This implementation)
390 ; tmp12 = (-1.613125930 - 1) * z10 + z5;
391 ; = -1.613125930 * z10 - z10 + z5;
395 pmulhw xmm4,[GOTOFF(ebx,PW_F1847)] ; xmm4=z5
396 pmulhw xmm6,[GOTOFF(ebx,PW_MF1613)]
397 pmulhw xmm0,[GOTOFF(ebx,PW_F1082)]
399 psubw xmm0,xmm4 ; xmm0=tmp10
400 paddw xmm6,xmm4 ; xmm6=tmp12
402 ; -- Final output stage
404 psubw xmm6,xmm5 ; xmm6=tmp6
407 paddw xmm1,xmm5 ; xmm1=data0=(00 10 20 30 40 50 60 70)
408 paddw xmm3,xmm6 ; xmm3=data1=(01 11 21 31 41 51 61 71)
409 psraw xmm1,(PASS1_BITS+3) ; descale
410 psraw xmm3,(PASS1_BITS+3) ; descale
411 psubw xmm7,xmm5 ; xmm7=data7=(07 17 27 37 47 57 67 77)
412 psubw xmm4,xmm6 ; xmm4=data6=(06 16 26 36 46 56 66 76)
413 psraw xmm7,(PASS1_BITS+3) ; descale
414 psraw xmm4,(PASS1_BITS+3) ; descale
415 psubw xmm2,xmm6 ; xmm2=tmp5
417 packsswb xmm1,xmm4 ; xmm1=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
418 packsswb xmm3,xmm7 ; xmm3=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
420 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp2
421 movdqa xmm6, XMMWORD [wk(0)] ; xmm6=tmp3
423 paddw xmm0,xmm2 ; xmm0=tmp4
426 paddw xmm5,xmm2 ; xmm5=data2=(02 12 22 32 42 52 62 72)
427 paddw xmm6,xmm0 ; xmm6=data4=(04 14 24 34 44 54 64 74)
428 psraw xmm5,(PASS1_BITS+3) ; descale
429 psraw xmm6,(PASS1_BITS+3) ; descale
430 psubw xmm4,xmm2 ; xmm4=data5=(05 15 25 35 45 55 65 75)
431 psubw xmm7,xmm0 ; xmm7=data3=(03 13 23 33 43 53 63 73)
432 psraw xmm4,(PASS1_BITS+3) ; descale
433 psraw xmm7,(PASS1_BITS+3) ; descale
435 movdqa xmm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm2=[PB_CENTERJSAMP]
437 packsswb xmm5,xmm6 ; xmm5=(02 12 22 32 42 52 62 72 04 14 24 34 44 54 64 74)
438 packsswb xmm7,xmm4 ; xmm7=(03 13 23 33 43 53 63 73 05 15 25 35 45 55 65 75)
445 movdqa xmm0,xmm1 ; transpose coefficients(phase 1)
446 punpcklbw xmm1,xmm3 ; xmm1=(00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71)
447 punpckhbw xmm0,xmm3 ; xmm0=(06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77)
448 movdqa xmm6,xmm5 ; transpose coefficients(phase 1)
449 punpcklbw xmm5,xmm7 ; xmm5=(02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73)
450 punpckhbw xmm6,xmm7 ; xmm6=(04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75)
452 movdqa xmm4,xmm1 ; transpose coefficients(phase 2)
453 punpcklwd xmm1,xmm5 ; xmm1=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
454 punpckhwd xmm4,xmm5 ; xmm4=(40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73)
455 movdqa xmm2,xmm6 ; transpose coefficients(phase 2)
456 punpcklwd xmm6,xmm0 ; xmm6=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
457 punpckhwd xmm2,xmm0 ; xmm2=(44 45 46 47 54 55 56 57 64 65 66 67 74 75 76 77)
459 movdqa xmm3,xmm1 ; transpose coefficients(phase 3)
460 punpckldq xmm1,xmm6 ; xmm1=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
461 punpckhdq xmm3,xmm6 ; xmm3=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
462 movdqa xmm7,xmm4 ; transpose coefficients(phase 3)
463 punpckldq xmm4,xmm2 ; xmm4=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57)
464 punpckhdq xmm7,xmm2 ; xmm7=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77)
466 pshufd xmm5,xmm1,0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
467 pshufd xmm0,xmm3,0x4E ; xmm0=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
468 pshufd xmm6,xmm4,0x4E ; xmm6=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47)
469 pshufd xmm2,xmm7,0x4E ; xmm2=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67)
471 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
472 mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
473 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm1
474 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm3
475 mov edx, JSAMPROW [edi+4*SIZEOF_JSAMPROW]
476 mov esi, JSAMPROW [edi+6*SIZEOF_JSAMPROW]
477 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm4
478 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm7
480 mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
481 mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
482 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm5
483 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm0
484 mov edx, JSAMPROW [edi+5*SIZEOF_JSAMPROW]
485 mov esi, JSAMPROW [edi+7*SIZEOF_JSAMPROW]
486 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6
487 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm2
491 ; pop edx ; need not be preserved
494 mov esp,ebp ; esp <- aligned ebp
495 pop esp ; esp <- original ebp
499 ; For some reason, the OS X linker does not honor the request to align the
500 ; segment unless we do this.