2 ; jidctflt.asm - floating-point IDCT (SSE & SSE2)
4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
5 ; Copyright (C) 2016, D. R. Commander.
7 ; Based on the 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_DATA(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
73 %define workspace wk(0) - DCTSIZE2 * SIZEOF_FAST_FLOAT
74 ; FAST_FLOAT workspace[DCTSIZE2]
77 GLOBAL_FUNCTION(jsimd_idct_float_sse2)
79 EXTN(jsimd_idct_float_sse2):
81 mov eax, esp ; eax = original ebp
83 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
85 mov ebp, esp ; ebp = aligned ebp
88 ; push ecx ; need not be preserved
89 ; push edx ; need not be preserved
93 get_GOT ebx ; get GOT address
95 ; ---- Pass 1: process columns from input, store into work array.
97 ; mov eax, [original_ebp]
98 mov edx, POINTER [dct_table(eax)] ; quantptr
99 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
100 lea edi, [workspace] ; FAST_FLOAT *wsptr
101 mov ecx, DCTSIZE/4 ; ctr
104 %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
105 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
106 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
109 movq xmm1, XMM_MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
110 movq xmm2, XMM_MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
111 movq xmm3, XMM_MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
112 movq xmm4, XMM_MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
113 movq xmm5, XMM_MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
114 movq xmm6, XMM_MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
115 movq xmm7, XMM_MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
127 ; -- AC terms all zero
129 movq xmm0, XMM_MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
131 punpcklwd xmm0, xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
132 psrad xmm0, (DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03)
133 cvtdq2ps xmm0, xmm0 ; xmm0=in0=(00 01 02 03)
135 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
141 shufps xmm0, xmm0, 0x00 ; xmm0=(00 00 00 00)
142 shufps xmm1, xmm1, 0x55 ; xmm1=(01 01 01 01)
143 shufps xmm2, xmm2, 0xAA ; xmm2=(02 02 02 02)
144 shufps xmm3, xmm3, 0xFF ; xmm3=(03 03 03 03)
146 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0
147 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
148 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1
149 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
150 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2
151 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2
152 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3
153 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
161 movq xmm0, XMM_MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
162 movq xmm1, XMM_MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
163 movq xmm2, XMM_MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
164 movq xmm3, XMM_MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
166 punpcklwd xmm0, xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
167 punpcklwd xmm1, xmm1 ; xmm1=(20 20 21 21 22 22 23 23)
168 psrad xmm0, (DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03)
169 psrad xmm1, (DWORD_BIT-WORD_BIT) ; xmm1=in2=(20 21 22 23)
170 cvtdq2ps xmm0, xmm0 ; xmm0=in0=(00 01 02 03)
171 cvtdq2ps xmm1, xmm1 ; xmm1=in2=(20 21 22 23)
173 punpcklwd xmm2, xmm2 ; xmm2=(40 40 41 41 42 42 43 43)
174 punpcklwd xmm3, xmm3 ; xmm3=(60 60 61 61 62 62 63 63)
175 psrad xmm2, (DWORD_BIT-WORD_BIT) ; xmm2=in4=(40 41 42 43)
176 psrad xmm3, (DWORD_BIT-WORD_BIT) ; xmm3=in6=(60 61 62 63)
177 cvtdq2ps xmm2, xmm2 ; xmm2=in4=(40 41 42 43)
178 cvtdq2ps xmm3, xmm3 ; xmm3=in6=(60 61 62 63)
180 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
181 mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
182 mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
183 mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
187 subps xmm0, xmm2 ; xmm0=tmp11
189 addps xmm4, xmm2 ; xmm4=tmp10
190 addps xmm5, xmm3 ; xmm5=tmp13
192 mulps xmm1, [GOTOFF(ebx,PD_1_414)]
193 subps xmm1, xmm5 ; xmm1=tmp12
197 subps xmm4, xmm5 ; xmm4=tmp3
198 subps xmm0, xmm1 ; xmm0=tmp2
199 addps xmm6, xmm5 ; xmm6=tmp0
200 addps xmm7, xmm1 ; xmm7=tmp1
202 movaps XMMWORD [wk(1)], xmm4 ; tmp3
203 movaps XMMWORD [wk(0)], xmm0 ; tmp2
207 movq xmm2, XMM_MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
208 movq xmm3, XMM_MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
209 movq xmm5, XMM_MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
210 movq xmm1, XMM_MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
212 punpcklwd xmm2, xmm2 ; xmm2=(10 10 11 11 12 12 13 13)
213 punpcklwd xmm3, xmm3 ; xmm3=(30 30 31 31 32 32 33 33)
214 psrad xmm2, (DWORD_BIT-WORD_BIT) ; xmm2=in1=(10 11 12 13)
215 psrad xmm3, (DWORD_BIT-WORD_BIT) ; xmm3=in3=(30 31 32 33)
216 cvtdq2ps xmm2, xmm2 ; xmm2=in1=(10 11 12 13)
217 cvtdq2ps xmm3, xmm3 ; xmm3=in3=(30 31 32 33)
219 punpcklwd xmm5, xmm5 ; xmm5=(50 50 51 51 52 52 53 53)
220 punpcklwd xmm1, xmm1 ; xmm1=(70 70 71 71 72 72 73 73)
221 psrad xmm5, (DWORD_BIT-WORD_BIT) ; xmm5=in5=(50 51 52 53)
222 psrad xmm1, (DWORD_BIT-WORD_BIT) ; xmm1=in7=(70 71 72 73)
223 cvtdq2ps xmm5, xmm5 ; xmm5=in5=(50 51 52 53)
224 cvtdq2ps xmm1, xmm1 ; xmm1=in7=(70 71 72 73)
226 mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
227 mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
228 mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
229 mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
233 addps xmm2, xmm1 ; xmm2=z11
234 addps xmm5, xmm3 ; xmm5=z13
235 subps xmm4, xmm1 ; xmm4=z12
236 subps xmm0, xmm3 ; xmm0=z10
240 addps xmm1, xmm5 ; xmm1=tmp7
242 mulps xmm2, [GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
246 mulps xmm0, [GOTOFF(ebx,PD_1_847)] ; xmm0=z5
247 mulps xmm3, [GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
248 mulps xmm4, [GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
249 addps xmm3, xmm0 ; xmm3=tmp12
250 subps xmm4, xmm0 ; xmm4=tmp10
252 ; -- Final output stage
254 subps xmm3, xmm1 ; xmm3=tmp6
257 addps xmm6, xmm1 ; xmm6=data0=(00 01 02 03)
258 addps xmm7, xmm3 ; xmm7=data1=(10 11 12 13)
259 subps xmm5, xmm1 ; xmm5=data7=(70 71 72 73)
260 subps xmm0, xmm3 ; xmm0=data6=(60 61 62 63)
261 subps xmm2, xmm3 ; xmm2=tmp5
263 movaps xmm1, xmm6 ; transpose coefficients(phase 1)
264 unpcklps xmm6, xmm7 ; xmm6=(00 10 01 11)
265 unpckhps xmm1, xmm7 ; xmm1=(02 12 03 13)
266 movaps xmm3, xmm0 ; transpose coefficients(phase 1)
267 unpcklps xmm0, xmm5 ; xmm0=(60 70 61 71)
268 unpckhps xmm3, xmm5 ; xmm3=(62 72 63 73)
270 movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
271 movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3
273 movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71)
274 movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73)
276 addps xmm4, xmm2 ; xmm4=tmp4
279 addps xmm7, xmm2 ; xmm7=data2=(20 21 22 23)
280 addps xmm5, xmm4 ; xmm5=data4=(40 41 42 43)
281 subps xmm0, xmm2 ; xmm0=data5=(50 51 52 53)
282 subps xmm3, xmm4 ; xmm3=data3=(30 31 32 33)
284 movaps xmm2, xmm7 ; transpose coefficients(phase 1)
285 unpcklps xmm7, xmm3 ; xmm7=(20 30 21 31)
286 unpckhps xmm2, xmm3 ; xmm2=(22 32 23 33)
287 movaps xmm4, xmm5 ; transpose coefficients(phase 1)
288 unpcklps xmm5, xmm0 ; xmm5=(40 50 41 51)
289 unpckhps xmm4, xmm0 ; xmm4=(42 52 43 53)
291 movaps xmm3, xmm6 ; transpose coefficients(phase 2)
292 unpcklps2 xmm6, xmm7 ; xmm6=(00 10 20 30)
293 unpckhps2 xmm3, xmm7 ; xmm3=(01 11 21 31)
294 movaps xmm0, xmm1 ; transpose coefficients(phase 2)
295 unpcklps2 xmm1, xmm2 ; xmm1=(02 12 22 32)
296 unpckhps2 xmm0, xmm2 ; xmm0=(03 13 23 33)
298 movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71)
299 movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73)
301 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6
302 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
303 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1
304 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0
306 movaps xmm6, xmm5 ; transpose coefficients(phase 2)
307 unpcklps2 xmm5, xmm7 ; xmm5=(40 50 60 70)
308 unpckhps2 xmm6, xmm7 ; xmm6=(41 51 61 71)
309 movaps xmm3, xmm4 ; transpose coefficients(phase 2)
310 unpcklps2 xmm4, xmm2 ; xmm4=(42 52 62 72)
311 unpckhps2 xmm3, xmm2 ; xmm3=(43 53 63 73)
313 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5
314 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
315 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4
316 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
319 add esi, byte 4*SIZEOF_JCOEF ; coef_block
320 add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr
321 add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
325 ; -- Prefetch the next coefficient block
327 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
328 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
329 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
330 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
332 ; ---- Pass 2: process rows from work array, store into output array.
334 mov eax, [original_ebp]
335 lea esi, [workspace] ; FAST_FLOAT *wsptr
336 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
337 mov eax, JDIMENSION [output_col(eax)]
338 mov ecx, DCTSIZE/4 ; ctr
344 movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
345 movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
346 movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
347 movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
351 subps xmm0, xmm2 ; xmm0=tmp11
353 addps xmm4, xmm2 ; xmm4=tmp10
354 addps xmm5, xmm3 ; xmm5=tmp13
356 mulps xmm1, [GOTOFF(ebx,PD_1_414)]
357 subps xmm1, xmm5 ; xmm1=tmp12
361 subps xmm4, xmm5 ; xmm4=tmp3
362 subps xmm0, xmm1 ; xmm0=tmp2
363 addps xmm6, xmm5 ; xmm6=tmp0
364 addps xmm7, xmm1 ; xmm7=tmp1
366 movaps XMMWORD [wk(1)], xmm4 ; tmp3
367 movaps XMMWORD [wk(0)], xmm0 ; tmp2
371 movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
372 movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
373 movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
374 movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
378 addps xmm2, xmm1 ; xmm2=z11
379 addps xmm5, xmm3 ; xmm5=z13
380 subps xmm4, xmm1 ; xmm4=z12
381 subps xmm0, xmm3 ; xmm0=z10
385 addps xmm1, xmm5 ; xmm1=tmp7
387 mulps xmm2, [GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
391 mulps xmm0, [GOTOFF(ebx,PD_1_847)] ; xmm0=z5
392 mulps xmm3, [GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
393 mulps xmm4, [GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
394 addps xmm3, xmm0 ; xmm3=tmp12
395 subps xmm4, xmm0 ; xmm4=tmp10
397 ; -- Final output stage
399 subps xmm3, xmm1 ; xmm3=tmp6
402 addps xmm6, xmm1 ; xmm6=data0=(00 10 20 30)
403 addps xmm7, xmm3 ; xmm7=data1=(01 11 21 31)
404 subps xmm5, xmm1 ; xmm5=data7=(07 17 27 37)
405 subps xmm0, xmm3 ; xmm0=data6=(06 16 26 36)
406 subps xmm2, xmm3 ; xmm2=tmp5
408 movaps xmm1, [GOTOFF(ebx,PD_RNDINT_MAGIC)] ; xmm1=[PD_RNDINT_MAGIC]
410 psrld xmm3, WORD_BIT ; xmm3={0xFFFF 0x0000 0xFFFF 0x0000 ..}
412 addps xmm6, xmm1 ; xmm6=roundint(data0/8)=(00 ** 10 ** 20 ** 30 **)
413 addps xmm7, xmm1 ; xmm7=roundint(data1/8)=(01 ** 11 ** 21 ** 31 **)
414 addps xmm0, xmm1 ; xmm0=roundint(data6/8)=(06 ** 16 ** 26 ** 36 **)
415 addps xmm5, xmm1 ; xmm5=roundint(data7/8)=(07 ** 17 ** 27 ** 37 **)
417 pand xmm6, xmm3 ; xmm6=(00 -- 10 -- 20 -- 30 --)
418 pslld xmm7, WORD_BIT ; xmm7=(-- 01 -- 11 -- 21 -- 31)
419 pand xmm0, xmm3 ; xmm0=(06 -- 16 -- 26 -- 36 --)
420 pslld xmm5, WORD_BIT ; xmm5=(-- 07 -- 17 -- 27 -- 37)
421 por xmm6, xmm7 ; xmm6=(00 01 10 11 20 21 30 31)
422 por xmm0, xmm5 ; xmm0=(06 07 16 17 26 27 36 37)
424 movaps xmm1, XMMWORD [wk(0)] ; xmm1=tmp2
425 movaps xmm3, XMMWORD [wk(1)] ; xmm3=tmp3
427 addps xmm4, xmm2 ; xmm4=tmp4
430 addps xmm1, xmm2 ; xmm1=data2=(02 12 22 32)
431 addps xmm3, xmm4 ; xmm3=data4=(04 14 24 34)
432 subps xmm7, xmm2 ; xmm7=data5=(05 15 25 35)
433 subps xmm5, xmm4 ; xmm5=data3=(03 13 23 33)
435 movaps xmm2, [GOTOFF(ebx,PD_RNDINT_MAGIC)] ; xmm2=[PD_RNDINT_MAGIC]
437 psrld xmm4, WORD_BIT ; xmm4={0xFFFF 0x0000 0xFFFF 0x0000 ..}
439 addps xmm3, xmm2 ; xmm3=roundint(data4/8)=(04 ** 14 ** 24 ** 34 **)
440 addps xmm7, xmm2 ; xmm7=roundint(data5/8)=(05 ** 15 ** 25 ** 35 **)
441 addps xmm1, xmm2 ; xmm1=roundint(data2/8)=(02 ** 12 ** 22 ** 32 **)
442 addps xmm5, xmm2 ; xmm5=roundint(data3/8)=(03 ** 13 ** 23 ** 33 **)
444 pand xmm3, xmm4 ; xmm3=(04 -- 14 -- 24 -- 34 --)
445 pslld xmm7, WORD_BIT ; xmm7=(-- 05 -- 15 -- 25 -- 35)
446 pand xmm1, xmm4 ; xmm1=(02 -- 12 -- 22 -- 32 --)
447 pslld xmm5, WORD_BIT ; xmm5=(-- 03 -- 13 -- 23 -- 33)
448 por xmm3, xmm7 ; xmm3=(04 05 14 15 24 25 34 35)
449 por xmm1, xmm5 ; xmm1=(02 03 12 13 22 23 32 33)
451 movdqa xmm2, [GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm2=[PB_CENTERJSAMP]
453 packsswb xmm6, xmm3 ; xmm6=(00 01 10 11 20 21 30 31 04 05 14 15 24 25 34 35)
454 packsswb xmm1, xmm0 ; xmm1=(02 03 12 13 22 23 32 33 06 07 16 17 26 27 36 37)
458 movdqa xmm4, xmm6 ; transpose coefficients(phase 2)
459 punpcklwd xmm6, xmm1 ; xmm6=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
460 punpckhwd xmm4, xmm1 ; xmm4=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
462 movdqa xmm7, xmm6 ; transpose coefficients(phase 3)
463 punpckldq xmm6, xmm4 ; xmm6=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
464 punpckhdq xmm7, xmm4 ; xmm7=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
466 pshufd xmm5, xmm6, 0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
467 pshufd xmm3, xmm7, 0x4E ; xmm3=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
469 pushpic ebx ; save GOT address
471 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
472 mov ebx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
473 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6
474 movq XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE], xmm7
475 mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
476 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
477 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm5
478 movq XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE], xmm3
480 poppic ebx ; restore GOT address
482 add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr
483 add edi, byte 4*SIZEOF_JSAMPROW
489 ; pop edx ; need not be preserved
490 ; pop ecx ; need not be preserved
492 mov esp, ebp ; esp <- aligned ebp
493 pop esp ; esp <- original ebp
497 ; For some reason, the OS X linker does not honor the request to align the
498 ; segment unless we do this.