2 ; jiss2flt.asm - floating-point IDCT (SSE & SSE2)
4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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
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
17 ; This file contains a floating-point implementation of the inverse DCT
18 ; (Discrete Cosine Transform). The following code is based directly on
19 ; the IJG's original jidctflt.c; see the jidctflt.c for more details.
23 %include "jsimdext.inc"
26 ; --------------------------------------------------------------------------
28 %macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5)
32 %macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7)
36 ; --------------------------------------------------------------------------
40 global EXTN(jconst_idct_float_sse2)
42 EXTN(jconst_idct_float_sse2):
44 PD_1_414 times 4 dd 1.414213562373095048801689
45 PD_1_847 times 4 dd 1.847759065022573512256366
46 PD_1_082 times 4 dd 1.082392200292393968799446
47 PD_M2_613 times 4 dd -2.613125929752753055713286
48 PD_RNDINT_MAGIC times 4 dd 100663296.0 ; (float)(0x00C00000 << 3)
49 PB_CENTERJSAMP times 16 db CENTERJSAMPLE
53 ; --------------------------------------------------------------------------
57 ; Perform dequantization and inverse DCT on one block of coefficients.
60 ; jsimd_idct_float_sse2 (void * dct_table, JCOEFPTR coef_block,
61 ; JSAMPARRAY output_buf, JDIMENSION output_col)
64 %define dct_table(b) (b)+8 ; void * dct_table
65 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block
66 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
67 %define output_col(b) (b)+20 ; JDIMENSION output_col
69 %define original_ebp ebp+0
70 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
72 %define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT
73 ; FAST_FLOAT workspace[DCTSIZE2]
76 global EXTN(jsimd_idct_float_sse2)
78 EXTN(jsimd_idct_float_sse2):
80 mov eax,esp ; eax = original ebp
82 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
84 mov ebp,esp ; ebp = aligned ebp
87 ; push ecx ; need not be preserved
88 ; push edx ; need not be preserved
92 get_GOT ebx ; get GOT address
94 ; ---- Pass 1: process columns from input, store into work array.
96 ; mov eax, [original_ebp]
97 mov edx, POINTER [dct_table(eax)] ; quantptr
98 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
99 lea edi, [workspace] ; FAST_FLOAT * wsptr
100 mov ecx, DCTSIZE/4 ; ctr
103 %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
104 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
105 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
108 movq xmm1, XMM_MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
109 movq xmm2, XMM_MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
110 movq xmm3, XMM_MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
111 movq xmm4, XMM_MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
112 movq xmm5, XMM_MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
113 movq xmm6, XMM_MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
114 movq xmm7, XMM_MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
126 ; -- AC terms all zero
128 movq xmm0, XMM_MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
130 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
131 psrad xmm0,(DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03)
132 cvtdq2ps xmm0,xmm0 ; xmm0=in0=(00 01 02 03)
134 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
140 shufps xmm0,xmm0,0x00 ; xmm0=(00 00 00 00)
141 shufps xmm1,xmm1,0x55 ; xmm1=(01 01 01 01)
142 shufps xmm2,xmm2,0xAA ; xmm2=(02 02 02 02)
143 shufps xmm3,xmm3,0xFF ; xmm3=(03 03 03 03)
145 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0
146 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
147 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1
148 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
149 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2
150 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2
151 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3
152 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
160 movq xmm0, XMM_MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
161 movq xmm1, XMM_MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
162 movq xmm2, XMM_MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
163 movq xmm3, XMM_MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
165 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
166 punpcklwd xmm1,xmm1 ; xmm1=(20 20 21 21 22 22 23 23)
167 psrad xmm0,(DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03)
168 psrad xmm1,(DWORD_BIT-WORD_BIT) ; xmm1=in2=(20 21 22 23)
169 cvtdq2ps xmm0,xmm0 ; xmm0=in0=(00 01 02 03)
170 cvtdq2ps xmm1,xmm1 ; xmm1=in2=(20 21 22 23)
172 punpcklwd xmm2,xmm2 ; xmm2=(40 40 41 41 42 42 43 43)
173 punpcklwd xmm3,xmm3 ; xmm3=(60 60 61 61 62 62 63 63)
174 psrad xmm2,(DWORD_BIT-WORD_BIT) ; xmm2=in4=(40 41 42 43)
175 psrad xmm3,(DWORD_BIT-WORD_BIT) ; xmm3=in6=(60 61 62 63)
176 cvtdq2ps xmm2,xmm2 ; xmm2=in4=(40 41 42 43)
177 cvtdq2ps xmm3,xmm3 ; xmm3=in6=(60 61 62 63)
179 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
180 mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
181 mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
182 mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
186 subps xmm0,xmm2 ; xmm0=tmp11
188 addps xmm4,xmm2 ; xmm4=tmp10
189 addps xmm5,xmm3 ; xmm5=tmp13
191 mulps xmm1,[GOTOFF(ebx,PD_1_414)]
192 subps xmm1,xmm5 ; xmm1=tmp12
196 subps xmm4,xmm5 ; xmm4=tmp3
197 subps xmm0,xmm1 ; xmm0=tmp2
198 addps xmm6,xmm5 ; xmm6=tmp0
199 addps xmm7,xmm1 ; xmm7=tmp1
201 movaps XMMWORD [wk(1)], xmm4 ; tmp3
202 movaps XMMWORD [wk(0)], xmm0 ; tmp2
206 movq xmm2, XMM_MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
207 movq xmm3, XMM_MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
208 movq xmm5, XMM_MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
209 movq xmm1, XMM_MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
211 punpcklwd xmm2,xmm2 ; xmm2=(10 10 11 11 12 12 13 13)
212 punpcklwd xmm3,xmm3 ; xmm3=(30 30 31 31 32 32 33 33)
213 psrad xmm2,(DWORD_BIT-WORD_BIT) ; xmm2=in1=(10 11 12 13)
214 psrad xmm3,(DWORD_BIT-WORD_BIT) ; xmm3=in3=(30 31 32 33)
215 cvtdq2ps xmm2,xmm2 ; xmm2=in1=(10 11 12 13)
216 cvtdq2ps xmm3,xmm3 ; xmm3=in3=(30 31 32 33)
218 punpcklwd xmm5,xmm5 ; xmm5=(50 50 51 51 52 52 53 53)
219 punpcklwd xmm1,xmm1 ; xmm1=(70 70 71 71 72 72 73 73)
220 psrad xmm5,(DWORD_BIT-WORD_BIT) ; xmm5=in5=(50 51 52 53)
221 psrad xmm1,(DWORD_BIT-WORD_BIT) ; xmm1=in7=(70 71 72 73)
222 cvtdq2ps xmm5,xmm5 ; xmm5=in5=(50 51 52 53)
223 cvtdq2ps xmm1,xmm1 ; xmm1=in7=(70 71 72 73)
225 mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
226 mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
227 mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
228 mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
232 addps xmm2,xmm1 ; xmm2=z11
233 addps xmm5,xmm3 ; xmm5=z13
234 subps xmm4,xmm1 ; xmm4=z12
235 subps xmm0,xmm3 ; xmm0=z10
239 addps xmm1,xmm5 ; xmm1=tmp7
241 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
245 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5
246 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
247 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
248 addps xmm3,xmm0 ; xmm3=tmp12
249 subps xmm4,xmm0 ; xmm4=tmp10
251 ; -- Final output stage
253 subps xmm3,xmm1 ; xmm3=tmp6
256 addps xmm6,xmm1 ; xmm6=data0=(00 01 02 03)
257 addps xmm7,xmm3 ; xmm7=data1=(10 11 12 13)
258 subps xmm5,xmm1 ; xmm5=data7=(70 71 72 73)
259 subps xmm0,xmm3 ; xmm0=data6=(60 61 62 63)
260 subps xmm2,xmm3 ; xmm2=tmp5
262 movaps xmm1,xmm6 ; transpose coefficients(phase 1)
263 unpcklps xmm6,xmm7 ; xmm6=(00 10 01 11)
264 unpckhps xmm1,xmm7 ; xmm1=(02 12 03 13)
265 movaps xmm3,xmm0 ; transpose coefficients(phase 1)
266 unpcklps xmm0,xmm5 ; xmm0=(60 70 61 71)
267 unpckhps xmm3,xmm5 ; xmm3=(62 72 63 73)
269 movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
270 movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3
272 movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71)
273 movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73)
275 addps xmm4,xmm2 ; xmm4=tmp4
278 addps xmm7,xmm2 ; xmm7=data2=(20 21 22 23)
279 addps xmm5,xmm4 ; xmm5=data4=(40 41 42 43)
280 subps xmm0,xmm2 ; xmm0=data5=(50 51 52 53)
281 subps xmm3,xmm4 ; xmm3=data3=(30 31 32 33)
283 movaps xmm2,xmm7 ; transpose coefficients(phase 1)
284 unpcklps xmm7,xmm3 ; xmm7=(20 30 21 31)
285 unpckhps xmm2,xmm3 ; xmm2=(22 32 23 33)
286 movaps xmm4,xmm5 ; transpose coefficients(phase 1)
287 unpcklps xmm5,xmm0 ; xmm5=(40 50 41 51)
288 unpckhps xmm4,xmm0 ; xmm4=(42 52 43 53)
290 movaps xmm3,xmm6 ; transpose coefficients(phase 2)
291 unpcklps2 xmm6,xmm7 ; xmm6=(00 10 20 30)
292 unpckhps2 xmm3,xmm7 ; xmm3=(01 11 21 31)
293 movaps xmm0,xmm1 ; transpose coefficients(phase 2)
294 unpcklps2 xmm1,xmm2 ; xmm1=(02 12 22 32)
295 unpckhps2 xmm0,xmm2 ; xmm0=(03 13 23 33)
297 movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71)
298 movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73)
300 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6
301 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
302 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1
303 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0
305 movaps xmm6,xmm5 ; transpose coefficients(phase 2)
306 unpcklps2 xmm5,xmm7 ; xmm5=(40 50 60 70)
307 unpckhps2 xmm6,xmm7 ; xmm6=(41 51 61 71)
308 movaps xmm3,xmm4 ; transpose coefficients(phase 2)
309 unpcklps2 xmm4,xmm2 ; xmm4=(42 52 62 72)
310 unpckhps2 xmm3,xmm2 ; xmm3=(43 53 63 73)
312 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5
313 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
314 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4
315 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
318 add esi, byte 4*SIZEOF_JCOEF ; coef_block
319 add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr
320 add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
324 ; -- Prefetch the next coefficient block
326 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
327 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
328 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
329 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
331 ; ---- Pass 2: process rows from work array, store into output array.
333 mov eax, [original_ebp]
334 lea esi, [workspace] ; FAST_FLOAT * wsptr
335 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
336 mov eax, JDIMENSION [output_col(eax)]
337 mov ecx, DCTSIZE/4 ; ctr
343 movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
344 movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
345 movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
346 movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
350 subps xmm0,xmm2 ; xmm0=tmp11
352 addps xmm4,xmm2 ; xmm4=tmp10
353 addps xmm5,xmm3 ; xmm5=tmp13
355 mulps xmm1,[GOTOFF(ebx,PD_1_414)]
356 subps xmm1,xmm5 ; xmm1=tmp12
360 subps xmm4,xmm5 ; xmm4=tmp3
361 subps xmm0,xmm1 ; xmm0=tmp2
362 addps xmm6,xmm5 ; xmm6=tmp0
363 addps xmm7,xmm1 ; xmm7=tmp1
365 movaps XMMWORD [wk(1)], xmm4 ; tmp3
366 movaps XMMWORD [wk(0)], xmm0 ; tmp2
370 movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
371 movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
372 movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
373 movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
377 addps xmm2,xmm1 ; xmm2=z11
378 addps xmm5,xmm3 ; xmm5=z13
379 subps xmm4,xmm1 ; xmm4=z12
380 subps xmm0,xmm3 ; xmm0=z10
384 addps xmm1,xmm5 ; xmm1=tmp7
386 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
390 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5
391 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
392 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
393 addps xmm3,xmm0 ; xmm3=tmp12
394 subps xmm4,xmm0 ; xmm4=tmp10
396 ; -- Final output stage
398 subps xmm3,xmm1 ; xmm3=tmp6
401 addps xmm6,xmm1 ; xmm6=data0=(00 10 20 30)
402 addps xmm7,xmm3 ; xmm7=data1=(01 11 21 31)
403 subps xmm5,xmm1 ; xmm5=data7=(07 17 27 37)
404 subps xmm0,xmm3 ; xmm0=data6=(06 16 26 36)
405 subps xmm2,xmm3 ; xmm2=tmp5
407 movaps xmm1,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; xmm1=[PD_RNDINT_MAGIC]
409 psrld xmm3,WORD_BIT ; xmm3={0xFFFF 0x0000 0xFFFF 0x0000 ..}
411 addps xmm6,xmm1 ; xmm6=roundint(data0/8)=(00 ** 10 ** 20 ** 30 **)
412 addps xmm7,xmm1 ; xmm7=roundint(data1/8)=(01 ** 11 ** 21 ** 31 **)
413 addps xmm0,xmm1 ; xmm0=roundint(data6/8)=(06 ** 16 ** 26 ** 36 **)
414 addps xmm5,xmm1 ; xmm5=roundint(data7/8)=(07 ** 17 ** 27 ** 37 **)
416 pand xmm6,xmm3 ; xmm6=(00 -- 10 -- 20 -- 30 --)
417 pslld xmm7,WORD_BIT ; xmm7=(-- 01 -- 11 -- 21 -- 31)
418 pand xmm0,xmm3 ; xmm0=(06 -- 16 -- 26 -- 36 --)
419 pslld xmm5,WORD_BIT ; xmm5=(-- 07 -- 17 -- 27 -- 37)
420 por xmm6,xmm7 ; xmm6=(00 01 10 11 20 21 30 31)
421 por xmm0,xmm5 ; xmm0=(06 07 16 17 26 27 36 37)
423 movaps xmm1, XMMWORD [wk(0)] ; xmm1=tmp2
424 movaps xmm3, XMMWORD [wk(1)] ; xmm3=tmp3
426 addps xmm4,xmm2 ; xmm4=tmp4
429 addps xmm1,xmm2 ; xmm1=data2=(02 12 22 32)
430 addps xmm3,xmm4 ; xmm3=data4=(04 14 24 34)
431 subps xmm7,xmm2 ; xmm7=data5=(05 15 25 35)
432 subps xmm5,xmm4 ; xmm5=data3=(03 13 23 33)
434 movaps xmm2,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; xmm2=[PD_RNDINT_MAGIC]
436 psrld xmm4,WORD_BIT ; xmm4={0xFFFF 0x0000 0xFFFF 0x0000 ..}
438 addps xmm3,xmm2 ; xmm3=roundint(data4/8)=(04 ** 14 ** 24 ** 34 **)
439 addps xmm7,xmm2 ; xmm7=roundint(data5/8)=(05 ** 15 ** 25 ** 35 **)
440 addps xmm1,xmm2 ; xmm1=roundint(data2/8)=(02 ** 12 ** 22 ** 32 **)
441 addps xmm5,xmm2 ; xmm5=roundint(data3/8)=(03 ** 13 ** 23 ** 33 **)
443 pand xmm3,xmm4 ; xmm3=(04 -- 14 -- 24 -- 34 --)
444 pslld xmm7,WORD_BIT ; xmm7=(-- 05 -- 15 -- 25 -- 35)
445 pand xmm1,xmm4 ; xmm1=(02 -- 12 -- 22 -- 32 --)
446 pslld xmm5,WORD_BIT ; xmm5=(-- 03 -- 13 -- 23 -- 33)
447 por xmm3,xmm7 ; xmm3=(04 05 14 15 24 25 34 35)
448 por xmm1,xmm5 ; xmm1=(02 03 12 13 22 23 32 33)
450 movdqa xmm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm2=[PB_CENTERJSAMP]
452 packsswb xmm6,xmm3 ; xmm6=(00 01 10 11 20 21 30 31 04 05 14 15 24 25 34 35)
453 packsswb xmm1,xmm0 ; xmm1=(02 03 12 13 22 23 32 33 06 07 16 17 26 27 36 37)
457 movdqa xmm4,xmm6 ; transpose coefficients(phase 2)
458 punpcklwd xmm6,xmm1 ; xmm6=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
459 punpckhwd xmm4,xmm1 ; xmm4=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
461 movdqa xmm7,xmm6 ; transpose coefficients(phase 3)
462 punpckldq xmm6,xmm4 ; xmm6=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
463 punpckhdq xmm7,xmm4 ; xmm7=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
465 pshufd xmm5,xmm6,0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
466 pshufd xmm3,xmm7,0x4E ; xmm3=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
468 pushpic ebx ; save GOT address
470 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
471 mov ebx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
472 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6
473 movq XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE], xmm7
474 mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
475 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
476 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm5
477 movq XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE], xmm3
479 poppic ebx ; restore GOT address
481 add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr
482 add edi, byte 4*SIZEOF_JSAMPROW
488 ; pop edx ; need not be preserved
489 ; pop ecx ; need not be preserved
491 mov esp,ebp ; esp <- aligned ebp
492 pop esp ; esp <- original ebp
496 ; For some reason, the OS X linker does not honor the request to align the
497 ; segment unless we do this.