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1;
2; jcclrss2.asm - colorspace conversion (SSE2)
3;
4; x86 SIMD extension for IJG JPEG library
5; Copyright (C) 1999-2006, MIYASAKA Masaru.
6; For conditions of distribution and use, see copyright notice in jsimdext.inc
7;
8; This file should be assembled with NASM (Netwide Assembler),
9; can *not* be assembled with Microsoft's MASM or any compatible
10; assembler (including Borland's Turbo Assembler).
11; NASM is available from http://nasm.sourceforge.net/ or
12; http://sourceforge.net/project/showfiles.php?group_id=6208
13;
14; [TAB8]
15
16%include "jcolsamp.inc"
17
18; --------------------------------------------------------------------------
19;
20; Convert some rows of samples to the output colorspace.
21;
22; GLOBAL(void)
23; jsimd_rgb_ycc_convert_sse2 (JDIMENSION img_width,
24;                             JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
25;                             JDIMENSION output_row, int num_rows);
26;
27
28%define img_width(b)	(b)+8			; JDIMENSION img_width
29%define input_buf(b)	(b)+12		; JSAMPARRAY input_buf
30%define output_buf(b)	(b)+16		; JSAMPIMAGE output_buf
31%define output_row(b)	(b)+20		; JDIMENSION output_row
32%define num_rows(b)	(b)+24		; int num_rows
33
34%define original_ebp	ebp+0
35%define wk(i)		ebp-(WK_NUM-(i))*SIZEOF_XMMWORD	; xmmword wk[WK_NUM]
36%define WK_NUM		8
37%define gotptr		wk(0)-SIZEOF_POINTER	; void * gotptr
38
39	align	16
40
41	global	EXTN(jsimd_rgb_ycc_convert_sse2) PRIVATE
42
43EXTN(jsimd_rgb_ycc_convert_sse2):
44	push	ebp
45	mov	eax,esp				; eax = original ebp
46	sub	esp, byte 4
47	and	esp, byte (-SIZEOF_XMMWORD)	; align to 128 bits
48	mov	[esp],eax
49	mov	ebp,esp				; ebp = aligned ebp
50	lea	esp, [wk(0)]
51	pushpic	eax		; make a room for GOT address
52	push	ebx
53;	push	ecx		; need not be preserved
54;	push	edx		; need not be preserved
55	push	esi
56	push	edi
57
58	get_GOT	ebx			; get GOT address
59	movpic	POINTER [gotptr], ebx	; save GOT address
60
61	mov	ecx, JDIMENSION [img_width(eax)]
62	test	ecx,ecx
63	jz	near .return
64
65	push	ecx
66
67	mov	esi, JSAMPIMAGE [output_buf(eax)]
68	mov	ecx, JDIMENSION [output_row(eax)]
69	mov	edi, JSAMPARRAY [esi+0*SIZEOF_JSAMPARRAY]
70	mov	ebx, JSAMPARRAY [esi+1*SIZEOF_JSAMPARRAY]
71	mov	edx, JSAMPARRAY [esi+2*SIZEOF_JSAMPARRAY]
72	lea	edi, [edi+ecx*SIZEOF_JSAMPROW]
73	lea	ebx, [ebx+ecx*SIZEOF_JSAMPROW]
74	lea	edx, [edx+ecx*SIZEOF_JSAMPROW]
75
76	pop	ecx
77
78	mov	esi, JSAMPARRAY [input_buf(eax)]
79	mov	eax, INT [num_rows(eax)]
80	test	eax,eax
81	jle	near .return
82	alignx	16,7
83.rowloop:
84	pushpic	eax
85	push	edx
86	push	ebx
87	push	edi
88	push	esi
89	push	ecx			; col
90
91	mov	esi, JSAMPROW [esi]	; inptr
92	mov	edi, JSAMPROW [edi]	; outptr0
93	mov	ebx, JSAMPROW [ebx]	; outptr1
94	mov	edx, JSAMPROW [edx]	; outptr2
95	movpic	eax, POINTER [gotptr]	; load GOT address (eax)
96
97	cmp	ecx, byte SIZEOF_XMMWORD
98	jae	near .columnloop
99	alignx	16,7
100
101%if RGB_PIXELSIZE == 3 ; ---------------
102
103.column_ld1:
104	push	eax
105	push	edx
106	lea	ecx,[ecx+ecx*2]		; imul ecx,RGB_PIXELSIZE
107	test	cl, SIZEOF_BYTE
108	jz	short .column_ld2
109	sub	ecx, byte SIZEOF_BYTE
110	movzx	eax, BYTE [esi+ecx]
111.column_ld2:
112	test	cl, SIZEOF_WORD
113	jz	short .column_ld4
114	sub	ecx, byte SIZEOF_WORD
115	movzx	edx, WORD [esi+ecx]
116	shl	eax, WORD_BIT
117	or	eax,edx
118.column_ld4:
119	movd	xmmA,eax
120	pop	edx
121	pop	eax
122	test	cl, SIZEOF_DWORD
123	jz	short .column_ld8
124	sub	ecx, byte SIZEOF_DWORD
125	movd	xmmF, XMM_DWORD [esi+ecx]
126	pslldq	xmmA, SIZEOF_DWORD
127	por	xmmA,xmmF
128.column_ld8:
129	test	cl, SIZEOF_MMWORD
130	jz	short .column_ld16
131	sub	ecx, byte SIZEOF_MMWORD
132	movq	xmmB, XMM_MMWORD [esi+ecx]
133	pslldq	xmmA, SIZEOF_MMWORD
134	por	xmmA,xmmB
135.column_ld16:
136	test	cl, SIZEOF_XMMWORD
137	jz	short .column_ld32
138	movdqa	xmmF,xmmA
139	movdqu	xmmA, XMMWORD [esi+0*SIZEOF_XMMWORD]
140	mov	ecx, SIZEOF_XMMWORD
141	jmp	short .rgb_ycc_cnv
142.column_ld32:
143	test	cl, 2*SIZEOF_XMMWORD
144	mov	ecx, SIZEOF_XMMWORD
145	jz	short .rgb_ycc_cnv
146	movdqa	xmmB,xmmA
147	movdqu	xmmA, XMMWORD [esi+0*SIZEOF_XMMWORD]
148	movdqu	xmmF, XMMWORD [esi+1*SIZEOF_XMMWORD]
149	jmp	short .rgb_ycc_cnv
150	alignx	16,7
151
152.columnloop:
153	movdqu	xmmA, XMMWORD [esi+0*SIZEOF_XMMWORD]
154	movdqu	xmmF, XMMWORD [esi+1*SIZEOF_XMMWORD]
155	movdqu	xmmB, XMMWORD [esi+2*SIZEOF_XMMWORD]
156
157.rgb_ycc_cnv:
158	; xmmA=(00 10 20 01 11 21 02 12 22 03 13 23 04 14 24 05)
159	; xmmF=(15 25 06 16 26 07 17 27 08 18 28 09 19 29 0A 1A)
160	; xmmB=(2A 0B 1B 2B 0C 1C 2C 0D 1D 2D 0E 1E 2E 0F 1F 2F)
161
162	movdqa    xmmG,xmmA
163	pslldq    xmmA,8	; xmmA=(-- -- -- -- -- -- -- -- 00 10 20 01 11 21 02 12)
164	psrldq    xmmG,8	; xmmG=(22 03 13 23 04 14 24 05 -- -- -- -- -- -- -- --)
165
166	punpckhbw xmmA,xmmF	; xmmA=(00 08 10 18 20 28 01 09 11 19 21 29 02 0A 12 1A)
167	pslldq    xmmF,8	; xmmF=(-- -- -- -- -- -- -- -- 15 25 06 16 26 07 17 27)
168
169	punpcklbw xmmG,xmmB	; xmmG=(22 2A 03 0B 13 1B 23 2B 04 0C 14 1C 24 2C 05 0D)
170	punpckhbw xmmF,xmmB	; xmmF=(15 1D 25 2D 06 0E 16 1E 26 2E 07 0F 17 1F 27 2F)
171
172	movdqa    xmmD,xmmA
173	pslldq    xmmA,8	; xmmA=(-- -- -- -- -- -- -- -- 00 08 10 18 20 28 01 09)
174	psrldq    xmmD,8	; xmmD=(11 19 21 29 02 0A 12 1A -- -- -- -- -- -- -- --)
175
176	punpckhbw xmmA,xmmG	; xmmA=(00 04 08 0C 10 14 18 1C 20 24 28 2C 01 05 09 0D)
177	pslldq    xmmG,8	; xmmG=(-- -- -- -- -- -- -- -- 22 2A 03 0B 13 1B 23 2B)
178
179	punpcklbw xmmD,xmmF	; xmmD=(11 15 19 1D 21 25 29 2D 02 06 0A 0E 12 16 1A 1E)
180	punpckhbw xmmG,xmmF	; xmmG=(22 26 2A 2E 03 07 0B 0F 13 17 1B 1F 23 27 2B 2F)
181
182	movdqa    xmmE,xmmA
183	pslldq    xmmA,8	; xmmA=(-- -- -- -- -- -- -- -- 00 04 08 0C 10 14 18 1C)
184	psrldq    xmmE,8	; xmmE=(20 24 28 2C 01 05 09 0D -- -- -- -- -- -- -- --)
185
186	punpckhbw xmmA,xmmD	; xmmA=(00 02 04 06 08 0A 0C 0E 10 12 14 16 18 1A 1C 1E)
187	pslldq    xmmD,8	; xmmD=(-- -- -- -- -- -- -- -- 11 15 19 1D 21 25 29 2D)
188
189	punpcklbw xmmE,xmmG	; xmmE=(20 22 24 26 28 2A 2C 2E 01 03 05 07 09 0B 0D 0F)
190	punpckhbw xmmD,xmmG	; xmmD=(11 13 15 17 19 1B 1D 1F 21 23 25 27 29 2B 2D 2F)
191
192	pxor      xmmH,xmmH
193
194	movdqa    xmmC,xmmA
195	punpcklbw xmmA,xmmH	; xmmA=(00 02 04 06 08 0A 0C 0E)
196	punpckhbw xmmC,xmmH	; xmmC=(10 12 14 16 18 1A 1C 1E)
197
198	movdqa    xmmB,xmmE
199	punpcklbw xmmE,xmmH	; xmmE=(20 22 24 26 28 2A 2C 2E)
200	punpckhbw xmmB,xmmH	; xmmB=(01 03 05 07 09 0B 0D 0F)
201
202	movdqa    xmmF,xmmD
203	punpcklbw xmmD,xmmH	; xmmD=(11 13 15 17 19 1B 1D 1F)
204	punpckhbw xmmF,xmmH	; xmmF=(21 23 25 27 29 2B 2D 2F)
205
206%else ; RGB_PIXELSIZE == 4 ; -----------
207
208.column_ld1:
209	test	cl, SIZEOF_XMMWORD/16
210	jz	short .column_ld2
211	sub	ecx, byte SIZEOF_XMMWORD/16
212	movd	xmmA, XMM_DWORD [esi+ecx*RGB_PIXELSIZE]
213.column_ld2:
214	test	cl, SIZEOF_XMMWORD/8
215	jz	short .column_ld4
216	sub	ecx, byte SIZEOF_XMMWORD/8
217	movq	xmmE, XMM_MMWORD [esi+ecx*RGB_PIXELSIZE]
218	pslldq	xmmA, SIZEOF_MMWORD
219	por	xmmA,xmmE
220.column_ld4:
221	test	cl, SIZEOF_XMMWORD/4
222	jz	short .column_ld8
223	sub	ecx, byte SIZEOF_XMMWORD/4
224	movdqa	xmmE,xmmA
225	movdqu	xmmA, XMMWORD [esi+ecx*RGB_PIXELSIZE]
226.column_ld8:
227	test	cl, SIZEOF_XMMWORD/2
228	mov	ecx, SIZEOF_XMMWORD
229	jz	short .rgb_ycc_cnv
230	movdqa	xmmF,xmmA
231	movdqa	xmmH,xmmE
232	movdqu	xmmA, XMMWORD [esi+0*SIZEOF_XMMWORD]
233	movdqu	xmmE, XMMWORD [esi+1*SIZEOF_XMMWORD]
234	jmp	short .rgb_ycc_cnv
235	alignx	16,7
236
237.columnloop:
238	movdqu	xmmA, XMMWORD [esi+0*SIZEOF_XMMWORD]
239	movdqu	xmmE, XMMWORD [esi+1*SIZEOF_XMMWORD]
240	movdqu	xmmF, XMMWORD [esi+2*SIZEOF_XMMWORD]
241	movdqu	xmmH, XMMWORD [esi+3*SIZEOF_XMMWORD]
242
243.rgb_ycc_cnv:
244	; xmmA=(00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33)
245	; xmmE=(04 14 24 34 05 15 25 35 06 16 26 36 07 17 27 37)
246	; xmmF=(08 18 28 38 09 19 29 39 0A 1A 2A 3A 0B 1B 2B 3B)
247	; xmmH=(0C 1C 2C 3C 0D 1D 2D 3D 0E 1E 2E 3E 0F 1F 2F 3F)
248
249	movdqa    xmmD,xmmA
250	punpcklbw xmmA,xmmE	; xmmA=(00 04 10 14 20 24 30 34 01 05 11 15 21 25 31 35)
251	punpckhbw xmmD,xmmE	; xmmD=(02 06 12 16 22 26 32 36 03 07 13 17 23 27 33 37)
252
253	movdqa    xmmC,xmmF
254	punpcklbw xmmF,xmmH	; xmmF=(08 0C 18 1C 28 2C 38 3C 09 0D 19 1D 29 2D 39 3D)
255	punpckhbw xmmC,xmmH	; xmmC=(0A 0E 1A 1E 2A 2E 3A 3E 0B 0F 1B 1F 2B 2F 3B 3F)
256
257	movdqa    xmmB,xmmA
258	punpcklwd xmmA,xmmF	; xmmA=(00 04 08 0C 10 14 18 1C 20 24 28 2C 30 34 38 3C)
259	punpckhwd xmmB,xmmF	; xmmB=(01 05 09 0D 11 15 19 1D 21 25 29 2D 31 35 39 3D)
260
261	movdqa    xmmG,xmmD
262	punpcklwd xmmD,xmmC	; xmmD=(02 06 0A 0E 12 16 1A 1E 22 26 2A 2E 32 36 3A 3E)
263	punpckhwd xmmG,xmmC	; xmmG=(03 07 0B 0F 13 17 1B 1F 23 27 2B 2F 33 37 3B 3F)
264
265	movdqa    xmmE,xmmA
266	punpcklbw xmmA,xmmD	; xmmA=(00 02 04 06 08 0A 0C 0E 10 12 14 16 18 1A 1C 1E)
267	punpckhbw xmmE,xmmD	; xmmE=(20 22 24 26 28 2A 2C 2E 30 32 34 36 38 3A 3C 3E)
268
269	movdqa    xmmH,xmmB
270	punpcklbw xmmB,xmmG	; xmmB=(01 03 05 07 09 0B 0D 0F 11 13 15 17 19 1B 1D 1F)
271	punpckhbw xmmH,xmmG	; xmmH=(21 23 25 27 29 2B 2D 2F 31 33 35 37 39 3B 3D 3F)
272
273	pxor      xmmF,xmmF
274
275	movdqa    xmmC,xmmA
276	punpcklbw xmmA,xmmF	; xmmA=(00 02 04 06 08 0A 0C 0E)
277	punpckhbw xmmC,xmmF	; xmmC=(10 12 14 16 18 1A 1C 1E)
278
279	movdqa    xmmD,xmmB
280	punpcklbw xmmB,xmmF	; xmmB=(01 03 05 07 09 0B 0D 0F)
281	punpckhbw xmmD,xmmF	; xmmD=(11 13 15 17 19 1B 1D 1F)
282
283	movdqa    xmmG,xmmE
284	punpcklbw xmmE,xmmF	; xmmE=(20 22 24 26 28 2A 2C 2E)
285	punpckhbw xmmG,xmmF	; xmmG=(30 32 34 36 38 3A 3C 3E)
286
287	punpcklbw xmmF,xmmH
288	punpckhbw xmmH,xmmH
289	psrlw     xmmF,BYTE_BIT	; xmmF=(21 23 25 27 29 2B 2D 2F)
290	psrlw     xmmH,BYTE_BIT	; xmmH=(31 33 35 37 39 3B 3D 3F)
291
292%endif ; RGB_PIXELSIZE ; ---------------
293
294	; xmm0=R(02468ACE)=RE, xmm2=G(02468ACE)=GE, xmm4=B(02468ACE)=BE
295	; xmm1=R(13579BDF)=RO, xmm3=G(13579BDF)=GO, xmm5=B(13579BDF)=BO
296
297	; (Original)
298	; Y  =  0.29900 * R + 0.58700 * G + 0.11400 * B
299	; Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE
300	; Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE
301	;
302	; (This implementation)
303	; Y  =  0.29900 * R + 0.33700 * G + 0.11400 * B + 0.25000 * G
304	; Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE
305	; Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE
306
307	movdqa    XMMWORD [wk(0)], xmm0	; wk(0)=RE
308	movdqa    XMMWORD [wk(1)], xmm1	; wk(1)=RO
309	movdqa    XMMWORD [wk(2)], xmm4	; wk(2)=BE
310	movdqa    XMMWORD [wk(3)], xmm5	; wk(3)=BO
311
312	movdqa    xmm6,xmm1
313	punpcklwd xmm1,xmm3
314	punpckhwd xmm6,xmm3
315	movdqa    xmm7,xmm1
316	movdqa    xmm4,xmm6
317	pmaddwd   xmm1,[GOTOFF(eax,PW_F0299_F0337)] ; xmm1=ROL*FIX(0.299)+GOL*FIX(0.337)
318	pmaddwd   xmm6,[GOTOFF(eax,PW_F0299_F0337)] ; xmm6=ROH*FIX(0.299)+GOH*FIX(0.337)
319	pmaddwd   xmm7,[GOTOFF(eax,PW_MF016_MF033)] ; xmm7=ROL*-FIX(0.168)+GOL*-FIX(0.331)
320	pmaddwd   xmm4,[GOTOFF(eax,PW_MF016_MF033)] ; xmm4=ROH*-FIX(0.168)+GOH*-FIX(0.331)
321
322	movdqa    XMMWORD [wk(4)], xmm1	; wk(4)=ROL*FIX(0.299)+GOL*FIX(0.337)
323	movdqa    XMMWORD [wk(5)], xmm6	; wk(5)=ROH*FIX(0.299)+GOH*FIX(0.337)
324
325	pxor      xmm1,xmm1
326	pxor      xmm6,xmm6
327	punpcklwd xmm1,xmm5		; xmm1=BOL
328	punpckhwd xmm6,xmm5		; xmm6=BOH
329	psrld     xmm1,1		; xmm1=BOL*FIX(0.500)
330	psrld     xmm6,1		; xmm6=BOH*FIX(0.500)
331
332	movdqa    xmm5,[GOTOFF(eax,PD_ONEHALFM1_CJ)] ; xmm5=[PD_ONEHALFM1_CJ]
333
334	paddd     xmm7,xmm1
335	paddd     xmm4,xmm6
336	paddd     xmm7,xmm5
337	paddd     xmm4,xmm5
338	psrld     xmm7,SCALEBITS	; xmm7=CbOL
339	psrld     xmm4,SCALEBITS	; xmm4=CbOH
340	packssdw  xmm7,xmm4		; xmm7=CbO
341
342	movdqa    xmm1, XMMWORD [wk(2)]	; xmm1=BE
343
344	movdqa    xmm6,xmm0
345	punpcklwd xmm0,xmm2
346	punpckhwd xmm6,xmm2
347	movdqa    xmm5,xmm0
348	movdqa    xmm4,xmm6
349	pmaddwd   xmm0,[GOTOFF(eax,PW_F0299_F0337)] ; xmm0=REL*FIX(0.299)+GEL*FIX(0.337)
350	pmaddwd   xmm6,[GOTOFF(eax,PW_F0299_F0337)] ; xmm6=REH*FIX(0.299)+GEH*FIX(0.337)
351	pmaddwd   xmm5,[GOTOFF(eax,PW_MF016_MF033)] ; xmm5=REL*-FIX(0.168)+GEL*-FIX(0.331)
352	pmaddwd   xmm4,[GOTOFF(eax,PW_MF016_MF033)] ; xmm4=REH*-FIX(0.168)+GEH*-FIX(0.331)
353
354	movdqa    XMMWORD [wk(6)], xmm0	; wk(6)=REL*FIX(0.299)+GEL*FIX(0.337)
355	movdqa    XMMWORD [wk(7)], xmm6	; wk(7)=REH*FIX(0.299)+GEH*FIX(0.337)
356
357	pxor      xmm0,xmm0
358	pxor      xmm6,xmm6
359	punpcklwd xmm0,xmm1		; xmm0=BEL
360	punpckhwd xmm6,xmm1		; xmm6=BEH
361	psrld     xmm0,1		; xmm0=BEL*FIX(0.500)
362	psrld     xmm6,1		; xmm6=BEH*FIX(0.500)
363
364	movdqa    xmm1,[GOTOFF(eax,PD_ONEHALFM1_CJ)] ; xmm1=[PD_ONEHALFM1_CJ]
365
366	paddd     xmm5,xmm0
367	paddd     xmm4,xmm6
368	paddd     xmm5,xmm1
369	paddd     xmm4,xmm1
370	psrld     xmm5,SCALEBITS	; xmm5=CbEL
371	psrld     xmm4,SCALEBITS	; xmm4=CbEH
372	packssdw  xmm5,xmm4		; xmm5=CbE
373
374	psllw     xmm7,BYTE_BIT
375	por       xmm5,xmm7		; xmm5=Cb
376	movdqa    XMMWORD [ebx], xmm5	; Save Cb
377
378	movdqa    xmm0, XMMWORD [wk(3)]	; xmm0=BO
379	movdqa    xmm6, XMMWORD [wk(2)]	; xmm6=BE
380	movdqa    xmm1, XMMWORD [wk(1)]	; xmm1=RO
381
382	movdqa    xmm4,xmm0
383	punpcklwd xmm0,xmm3
384	punpckhwd xmm4,xmm3
385	movdqa    xmm7,xmm0
386	movdqa    xmm5,xmm4
387	pmaddwd   xmm0,[GOTOFF(eax,PW_F0114_F0250)] ; xmm0=BOL*FIX(0.114)+GOL*FIX(0.250)
388	pmaddwd   xmm4,[GOTOFF(eax,PW_F0114_F0250)] ; xmm4=BOH*FIX(0.114)+GOH*FIX(0.250)
389	pmaddwd   xmm7,[GOTOFF(eax,PW_MF008_MF041)] ; xmm7=BOL*-FIX(0.081)+GOL*-FIX(0.418)
390	pmaddwd   xmm5,[GOTOFF(eax,PW_MF008_MF041)] ; xmm5=BOH*-FIX(0.081)+GOH*-FIX(0.418)
391
392	movdqa    xmm3,[GOTOFF(eax,PD_ONEHALF)]	; xmm3=[PD_ONEHALF]
393
394	paddd     xmm0, XMMWORD [wk(4)]
395	paddd     xmm4, XMMWORD [wk(5)]
396	paddd     xmm0,xmm3
397	paddd     xmm4,xmm3
398	psrld     xmm0,SCALEBITS	; xmm0=YOL
399	psrld     xmm4,SCALEBITS	; xmm4=YOH
400	packssdw  xmm0,xmm4		; xmm0=YO
401
402	pxor      xmm3,xmm3
403	pxor      xmm4,xmm4
404	punpcklwd xmm3,xmm1		; xmm3=ROL
405	punpckhwd xmm4,xmm1		; xmm4=ROH
406	psrld     xmm3,1		; xmm3=ROL*FIX(0.500)
407	psrld     xmm4,1		; xmm4=ROH*FIX(0.500)
408
409	movdqa    xmm1,[GOTOFF(eax,PD_ONEHALFM1_CJ)] ; xmm1=[PD_ONEHALFM1_CJ]
410
411	paddd     xmm7,xmm3
412	paddd     xmm5,xmm4
413	paddd     xmm7,xmm1
414	paddd     xmm5,xmm1
415	psrld     xmm7,SCALEBITS	; xmm7=CrOL
416	psrld     xmm5,SCALEBITS	; xmm5=CrOH
417	packssdw  xmm7,xmm5		; xmm7=CrO
418
419	movdqa    xmm3, XMMWORD [wk(0)]	; xmm3=RE
420
421	movdqa    xmm4,xmm6
422	punpcklwd xmm6,xmm2
423	punpckhwd xmm4,xmm2
424	movdqa    xmm1,xmm6
425	movdqa    xmm5,xmm4
426	pmaddwd   xmm6,[GOTOFF(eax,PW_F0114_F0250)] ; xmm6=BEL*FIX(0.114)+GEL*FIX(0.250)
427	pmaddwd   xmm4,[GOTOFF(eax,PW_F0114_F0250)] ; xmm4=BEH*FIX(0.114)+GEH*FIX(0.250)
428	pmaddwd   xmm1,[GOTOFF(eax,PW_MF008_MF041)] ; xmm1=BEL*-FIX(0.081)+GEL*-FIX(0.418)
429	pmaddwd   xmm5,[GOTOFF(eax,PW_MF008_MF041)] ; xmm5=BEH*-FIX(0.081)+GEH*-FIX(0.418)
430
431	movdqa    xmm2,[GOTOFF(eax,PD_ONEHALF)]	; xmm2=[PD_ONEHALF]
432
433	paddd     xmm6, XMMWORD [wk(6)]
434	paddd     xmm4, XMMWORD [wk(7)]
435	paddd     xmm6,xmm2
436	paddd     xmm4,xmm2
437	psrld     xmm6,SCALEBITS	; xmm6=YEL
438	psrld     xmm4,SCALEBITS	; xmm4=YEH
439	packssdw  xmm6,xmm4		; xmm6=YE
440
441	psllw     xmm0,BYTE_BIT
442	por       xmm6,xmm0		; xmm6=Y
443	movdqa    XMMWORD [edi], xmm6	; Save Y
444
445	pxor      xmm2,xmm2
446	pxor      xmm4,xmm4
447	punpcklwd xmm2,xmm3		; xmm2=REL
448	punpckhwd xmm4,xmm3		; xmm4=REH
449	psrld     xmm2,1		; xmm2=REL*FIX(0.500)
450	psrld     xmm4,1		; xmm4=REH*FIX(0.500)
451
452	movdqa    xmm0,[GOTOFF(eax,PD_ONEHALFM1_CJ)] ; xmm0=[PD_ONEHALFM1_CJ]
453
454	paddd     xmm1,xmm2
455	paddd     xmm5,xmm4
456	paddd     xmm1,xmm0
457	paddd     xmm5,xmm0
458	psrld     xmm1,SCALEBITS	; xmm1=CrEL
459	psrld     xmm5,SCALEBITS	; xmm5=CrEH
460	packssdw  xmm1,xmm5		; xmm1=CrE
461
462	psllw     xmm7,BYTE_BIT
463	por       xmm1,xmm7		; xmm1=Cr
464	movdqa    XMMWORD [edx], xmm1	; Save Cr
465
466	sub	ecx, byte SIZEOF_XMMWORD
467	add	esi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD	; inptr
468	add	edi, byte SIZEOF_XMMWORD		; outptr0
469	add	ebx, byte SIZEOF_XMMWORD		; outptr1
470	add	edx, byte SIZEOF_XMMWORD		; outptr2
471	cmp	ecx, byte SIZEOF_XMMWORD
472	jae	near .columnloop
473	test	ecx,ecx
474	jnz	near .column_ld1
475
476	pop	ecx			; col
477	pop	esi
478	pop	edi
479	pop	ebx
480	pop	edx
481	poppic	eax
482
483	add	esi, byte SIZEOF_JSAMPROW	; input_buf
484	add	edi, byte SIZEOF_JSAMPROW
485	add	ebx, byte SIZEOF_JSAMPROW
486	add	edx, byte SIZEOF_JSAMPROW
487	dec	eax				; num_rows
488	jg	near .rowloop
489
490.return:
491	pop	edi
492	pop	esi
493;	pop	edx		; need not be preserved
494;	pop	ecx		; need not be preserved
495	pop	ebx
496	mov	esp,ebp		; esp <- aligned ebp
497	pop	esp		; esp <- original ebp
498	pop	ebp
499	ret
500
501; For some reason, the OS X linker does not honor the request to align the
502; segment unless we do this.
503	align	16
504