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media/libjpeg/simd/jdclrmmx.asm@6474c204b198 (annotated)

media/libjpeg/simd/jdclrmmx.asm

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	;
michael@0	2	; jdclrmmx.asm - colorspace conversion (MMX)
michael@0	3	;
michael@0	4	; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
michael@0	5	;
michael@0	6	; Based on
michael@0	7	; x86 SIMD extension for IJG JPEG library
michael@0	8	; Copyright (C) 1999-2006, MIYASAKA Masaru.
michael@0	9	; For conditions of distribution and use, see copyright notice in jsimdext.inc
michael@0	10	;
michael@0	11	; This file should be assembled with NASM (Netwide Assembler),
michael@0	12	; can *not* be assembled with Microsoft's MASM or any compatible
michael@0	13	; assembler (including Borland's Turbo Assembler).
michael@0	14	; NASM is available from http://nasm.sourceforge.net/ or
michael@0	15	; http://sourceforge.net/project/showfiles.php?group_id=6208
michael@0	16	;
michael@0	17	; [TAB8]
michael@0	18
michael@0	19	%include "jcolsamp.inc"
michael@0	20
michael@0	21	; --------------------------------------------------------------------------
michael@0	22	;
michael@0	23	; Convert some rows of samples to the output colorspace.
michael@0	24	;
michael@0	25	; GLOBAL(void)
michael@0	26	; jsimd_ycc_rgb_convert_mmx (JDIMENSION out_width,
michael@0	27	; JSAMPIMAGE input_buf, JDIMENSION input_row,
michael@0	28	; JSAMPARRAY output_buf, int num_rows)
michael@0	29	;
michael@0	30
michael@0	31	%define out_width(b) (b)+8 ; JDIMENSION out_width
michael@0	32	%define input_buf(b) (b)+12 ; JSAMPIMAGE input_buf
michael@0	33	%define input_row(b) (b)+16 ; JDIMENSION input_row
michael@0	34	%define output_buf(b) (b)+20 ; JSAMPARRAY output_buf
michael@0	35	%define num_rows(b) (b)+24 ; int num_rows
michael@0	36
michael@0	37	%define original_ebp ebp+0
michael@0	38	%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
michael@0	39	%define WK_NUM 2
michael@0	40	%define gotptr wk(0)-SIZEOF_POINTER ; void * gotptr
michael@0	41
michael@0	42	align 16
michael@0	43	global EXTN(jsimd_ycc_rgb_convert_mmx)
michael@0	44
michael@0	45	EXTN(jsimd_ycc_rgb_convert_mmx):
michael@0	46	push ebp
michael@0	47	mov eax,esp ; eax = original ebp
michael@0	48	sub esp, byte 4
michael@0	49	and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
michael@0	50	mov [esp],eax
michael@0	51	mov ebp,esp ; ebp = aligned ebp
michael@0	52	lea esp, [wk(0)]
michael@0	53	pushpic eax ; make a room for GOT address
michael@0	54	push ebx
michael@0	55	; push ecx ; need not be preserved
michael@0	56	; push edx ; need not be preserved
michael@0	57	push esi
michael@0	58	push edi
michael@0	59
michael@0	60	get_GOT ebx ; get GOT address
michael@0	61	movpic POINTER [gotptr], ebx ; save GOT address
michael@0	62
michael@0	63	mov ecx, JDIMENSION [out_width(eax)] ; num_cols
michael@0	64	test ecx,ecx
michael@0	65	jz near .return
michael@0	66
michael@0	67	push ecx
michael@0	68
michael@0	69	mov edi, JSAMPIMAGE [input_buf(eax)]
michael@0	70	mov ecx, JDIMENSION [input_row(eax)]
michael@0	71	mov esi, JSAMPARRAY [edi+0*SIZEOF_JSAMPARRAY]
michael@0	72	mov ebx, JSAMPARRAY [edi+1*SIZEOF_JSAMPARRAY]
michael@0	73	mov edx, JSAMPARRAY [edi+2*SIZEOF_JSAMPARRAY]
michael@0	74	lea esi, [esi+ecx*SIZEOF_JSAMPROW]
michael@0	75	lea ebx, [ebx+ecx*SIZEOF_JSAMPROW]
michael@0	76	lea edx, [edx+ecx*SIZEOF_JSAMPROW]
michael@0	77
michael@0	78	pop ecx
michael@0	79
michael@0	80	mov edi, JSAMPARRAY [output_buf(eax)]
michael@0	81	mov eax, INT [num_rows(eax)]
michael@0	82	test eax,eax
michael@0	83	jle near .return
michael@0	84	alignx 16,7
michael@0	85	.rowloop:
michael@0	86	push eax
michael@0	87	push edi
michael@0	88	push edx
michael@0	89	push ebx
michael@0	90	push esi
michael@0	91	push ecx ; col
michael@0	92
michael@0	93	mov esi, JSAMPROW [esi] ; inptr0
michael@0	94	mov ebx, JSAMPROW [ebx] ; inptr1
michael@0	95	mov edx, JSAMPROW [edx] ; inptr2
michael@0	96	mov edi, JSAMPROW [edi] ; outptr
michael@0	97	movpic eax, POINTER [gotptr] ; load GOT address (eax)
michael@0	98	alignx 16,7
michael@0	99	.columnloop:
michael@0	100
michael@0	101	movq mm5, MMWORD [ebx] ; mm5=Cb(01234567)
michael@0	102	movq mm1, MMWORD [edx] ; mm1=Cr(01234567)
michael@0	103
michael@0	104	pcmpeqw mm4,mm4
michael@0	105	pcmpeqw mm7,mm7
michael@0	106	psrlw mm4,BYTE_BIT
michael@0	107	psllw mm7,7 ; mm7={0xFF80 0xFF80 0xFF80 0xFF80}
michael@0	108	movq mm0,mm4 ; mm0=mm4={0xFF 0x00 0xFF 0x00 ..}
michael@0	109
michael@0	110	pand mm4,mm5 ; mm4=Cb(0246)=CbE
michael@0	111	psrlw mm5,BYTE_BIT ; mm5=Cb(1357)=CbO
michael@0	112	pand mm0,mm1 ; mm0=Cr(0246)=CrE
michael@0	113	psrlw mm1,BYTE_BIT ; mm1=Cr(1357)=CrO
michael@0	114
michael@0	115	paddw mm4,mm7
michael@0	116	paddw mm5,mm7
michael@0	117	paddw mm0,mm7
michael@0	118	paddw mm1,mm7
michael@0	119
michael@0	120	; (Original)
michael@0	121	; R = Y + 1.40200 * Cr
michael@0	122	; G = Y - 0.34414 * Cb - 0.71414 * Cr
michael@0	123	; B = Y + 1.77200 * Cb
michael@0	124	;
michael@0	125	; (This implementation)
michael@0	126	; R = Y + 0.40200 * Cr + Cr
michael@0	127	; G = Y - 0.34414 * Cb + 0.28586 * Cr - Cr
michael@0	128	; B = Y - 0.22800 * Cb + Cb + Cb
michael@0	129
michael@0	130	movq mm2,mm4 ; mm2=CbE
michael@0	131	movq mm3,mm5 ; mm3=CbO
michael@0	132	paddw mm4,mm4 ; mm4=2*CbE
michael@0	133	paddw mm5,mm5 ; mm5=2*CbO
michael@0	134	movq mm6,mm0 ; mm6=CrE
michael@0	135	movq mm7,mm1 ; mm7=CrO
michael@0	136	paddw mm0,mm0 ; mm0=2*CrE
michael@0	137	paddw mm1,mm1 ; mm1=2*CrO
michael@0	138
michael@0	139	pmulhw mm4,[GOTOFF(eax,PW_MF0228)] ; mm4=(2*CbE * -FIX(0.22800))
michael@0	140	pmulhw mm5,[GOTOFF(eax,PW_MF0228)] ; mm5=(2*CbO * -FIX(0.22800))
michael@0	141	pmulhw mm0,[GOTOFF(eax,PW_F0402)] ; mm0=(2*CrE * FIX(0.40200))
michael@0	142	pmulhw mm1,[GOTOFF(eax,PW_F0402)] ; mm1=(2*CrO * FIX(0.40200))
michael@0	143
michael@0	144	paddw mm4,[GOTOFF(eax,PW_ONE)]
michael@0	145	paddw mm5,[GOTOFF(eax,PW_ONE)]
michael@0	146	psraw mm4,1 ; mm4=(CbE * -FIX(0.22800))
michael@0	147	psraw mm5,1 ; mm5=(CbO * -FIX(0.22800))
michael@0	148	paddw mm0,[GOTOFF(eax,PW_ONE)]
michael@0	149	paddw mm1,[GOTOFF(eax,PW_ONE)]
michael@0	150	psraw mm0,1 ; mm0=(CrE * FIX(0.40200))
michael@0	151	psraw mm1,1 ; mm1=(CrO * FIX(0.40200))
michael@0	152
michael@0	153	paddw mm4,mm2
michael@0	154	paddw mm5,mm3
michael@0	155	paddw mm4,mm2 ; mm4=(CbE * FIX(1.77200))=(B-Y)E
michael@0	156	paddw mm5,mm3 ; mm5=(CbO * FIX(1.77200))=(B-Y)O
michael@0	157	paddw mm0,mm6 ; mm0=(CrE * FIX(1.40200))=(R-Y)E
michael@0	158	paddw mm1,mm7 ; mm1=(CrO * FIX(1.40200))=(R-Y)O
michael@0	159
michael@0	160	movq MMWORD [wk(0)], mm4 ; wk(0)=(B-Y)E
michael@0	161	movq MMWORD [wk(1)], mm5 ; wk(1)=(B-Y)O
michael@0	162
michael@0	163	movq mm4,mm2
michael@0	164	movq mm5,mm3
michael@0	165	punpcklwd mm2,mm6
michael@0	166	punpckhwd mm4,mm6
michael@0	167	pmaddwd mm2,[GOTOFF(eax,PW_MF0344_F0285)]
michael@0	168	pmaddwd mm4,[GOTOFF(eax,PW_MF0344_F0285)]
michael@0	169	punpcklwd mm3,mm7
michael@0	170	punpckhwd mm5,mm7
michael@0	171	pmaddwd mm3,[GOTOFF(eax,PW_MF0344_F0285)]
michael@0	172	pmaddwd mm5,[GOTOFF(eax,PW_MF0344_F0285)]
michael@0	173
michael@0	174	paddd mm2,[GOTOFF(eax,PD_ONEHALF)]
michael@0	175	paddd mm4,[GOTOFF(eax,PD_ONEHALF)]
michael@0	176	psrad mm2,SCALEBITS
michael@0	177	psrad mm4,SCALEBITS
michael@0	178	paddd mm3,[GOTOFF(eax,PD_ONEHALF)]
michael@0	179	paddd mm5,[GOTOFF(eax,PD_ONEHALF)]
michael@0	180	psrad mm3,SCALEBITS
michael@0	181	psrad mm5,SCALEBITS
michael@0	182
michael@0	183	packssdw mm2,mm4 ; mm2=CbE*-FIX(0.344)+CrE*FIX(0.285)
michael@0	184	packssdw mm3,mm5 ; mm3=CbO*-FIX(0.344)+CrO*FIX(0.285)
michael@0	185	psubw mm2,mm6 ; mm2=CbE*-FIX(0.344)+CrE*-FIX(0.714)=(G-Y)E
michael@0	186	psubw mm3,mm7 ; mm3=CbO*-FIX(0.344)+CrO*-FIX(0.714)=(G-Y)O
michael@0	187
michael@0	188	movq mm5, MMWORD [esi] ; mm5=Y(01234567)
michael@0	189
michael@0	190	pcmpeqw mm4,mm4
michael@0	191	psrlw mm4,BYTE_BIT ; mm4={0xFF 0x00 0xFF 0x00 ..}
michael@0	192	pand mm4,mm5 ; mm4=Y(0246)=YE
michael@0	193	psrlw mm5,BYTE_BIT ; mm5=Y(1357)=YO
michael@0	194
michael@0	195	paddw mm0,mm4 ; mm0=((R-Y)E+YE)=RE=(R0 R2 R4 R6)
michael@0	196	paddw mm1,mm5 ; mm1=((R-Y)O+YO)=RO=(R1 R3 R5 R7)
michael@0	197	packuswb mm0,mm0 ; mm0=(R0 R2 R4 R6 ** ** ** **)
michael@0	198	packuswb mm1,mm1 ; mm1=(R1 R3 R5 R7 ** ** ** **)
michael@0	199
michael@0	200	paddw mm2,mm4 ; mm2=((G-Y)E+YE)=GE=(G0 G2 G4 G6)
michael@0	201	paddw mm3,mm5 ; mm3=((G-Y)O+YO)=GO=(G1 G3 G5 G7)
michael@0	202	packuswb mm2,mm2 ; mm2=(G0 G2 G4 G6 ** ** ** **)
michael@0	203	packuswb mm3,mm3 ; mm3=(G1 G3 G5 G7 ** ** ** **)
michael@0	204
michael@0	205	paddw mm4, MMWORD [wk(0)] ; mm4=(YE+(B-Y)E)=BE=(B0 B2 B4 B6)
michael@0	206	paddw mm5, MMWORD [wk(1)] ; mm5=(YO+(B-Y)O)=BO=(B1 B3 B5 B7)
michael@0	207	packuswb mm4,mm4 ; mm4=(B0 B2 B4 B6 ** ** ** **)
michael@0	208	packuswb mm5,mm5 ; mm5=(B1 B3 B5 B7 ** ** ** **)
michael@0	209
michael@0	210	%if RGB_PIXELSIZE == 3 ; ---------------
michael@0	211
michael@0	212	; mmA=(00 02 04 06 ** ** ** **), mmB=(01 03 05 07 ** ** ** **)
michael@0	213	; mmC=(10 12 14 16 ** ** ** **), mmD=(11 13 15 17 ** ** ** **)
michael@0	214	; mmE=(20 22 24 26 ** ** ** **), mmF=(21 23 25 27 ** ** ** **)
michael@0	215	; mmG=(** ** ** ** ** ** ** **), mmH=(** ** ** ** ** ** ** **)
michael@0	216
michael@0	217	punpcklbw mmA,mmC ; mmA=(00 10 02 12 04 14 06 16)
michael@0	218	punpcklbw mmE,mmB ; mmE=(20 01 22 03 24 05 26 07)
michael@0	219	punpcklbw mmD,mmF ; mmD=(11 21 13 23 15 25 17 27)
michael@0	220
michael@0	221	movq mmG,mmA
michael@0	222	movq mmH,mmA
michael@0	223	punpcklwd mmA,mmE ; mmA=(00 10 20 01 02 12 22 03)
michael@0	224	punpckhwd mmG,mmE ; mmG=(04 14 24 05 06 16 26 07)
michael@0	225
michael@0	226	psrlq mmH,2*BYTE_BIT ; mmH=(02 12 04 14 06 16 -- --)
michael@0	227	psrlq mmE,2*BYTE_BIT ; mmE=(22 03 24 05 26 07 -- --)
michael@0	228
michael@0	229	movq mmC,mmD
michael@0	230	movq mmB,mmD
michael@0	231	punpcklwd mmD,mmH ; mmD=(11 21 02 12 13 23 04 14)
michael@0	232	punpckhwd mmC,mmH ; mmC=(15 25 06 16 17 27 -- --)
michael@0	233
michael@0	234	psrlq mmB,2*BYTE_BIT ; mmB=(13 23 15 25 17 27 -- --)
michael@0	235
michael@0	236	movq mmF,mmE
michael@0	237	punpcklwd mmE,mmB ; mmE=(22 03 13 23 24 05 15 25)
michael@0	238	punpckhwd mmF,mmB ; mmF=(26 07 17 27 -- -- -- --)
michael@0	239
michael@0	240	punpckldq mmA,mmD ; mmA=(00 10 20 01 11 21 02 12)
michael@0	241	punpckldq mmE,mmG ; mmE=(22 03 13 23 04 14 24 05)
michael@0	242	punpckldq mmC,mmF ; mmC=(15 25 06 16 26 07 17 27)
michael@0	243
michael@0	244	cmp ecx, byte SIZEOF_MMWORD
michael@0	245	jb short .column_st16
michael@0	246
michael@0	247	movq MMWORD [edi+0*SIZEOF_MMWORD], mmA
michael@0	248	movq MMWORD [edi+1*SIZEOF_MMWORD], mmE
michael@0	249	movq MMWORD [edi+2*SIZEOF_MMWORD], mmC
michael@0	250
michael@0	251	sub ecx, byte SIZEOF_MMWORD
michael@0	252	jz short .nextrow
michael@0	253
michael@0	254	add esi, byte SIZEOF_MMWORD ; inptr0
michael@0	255	add ebx, byte SIZEOF_MMWORD ; inptr1
michael@0	256	add edx, byte SIZEOF_MMWORD ; inptr2
michael@0	257	add edi, byte RGB_PIXELSIZE*SIZEOF_MMWORD ; outptr
michael@0	258	jmp near .columnloop
michael@0	259	alignx 16,7
michael@0	260
michael@0	261	.column_st16:
michael@0	262	lea ecx, [ecx+ecx*2] ; imul ecx, RGB_PIXELSIZE
michael@0	263	cmp ecx, byte 2*SIZEOF_MMWORD
michael@0	264	jb short .column_st8
michael@0	265	movq MMWORD [edi+0*SIZEOF_MMWORD], mmA
michael@0	266	movq MMWORD [edi+1*SIZEOF_MMWORD], mmE
michael@0	267	movq mmA,mmC
michael@0	268	sub ecx, byte 2*SIZEOF_MMWORD
michael@0	269	add edi, byte 2*SIZEOF_MMWORD
michael@0	270	jmp short .column_st4
michael@0	271	.column_st8:
michael@0	272	cmp ecx, byte SIZEOF_MMWORD
michael@0	273	jb short .column_st4
michael@0	274	movq MMWORD [edi+0*SIZEOF_MMWORD], mmA
michael@0	275	movq mmA,mmE
michael@0	276	sub ecx, byte SIZEOF_MMWORD
michael@0	277	add edi, byte SIZEOF_MMWORD
michael@0	278	.column_st4:
michael@0	279	movd eax,mmA
michael@0	280	cmp ecx, byte SIZEOF_DWORD
michael@0	281	jb short .column_st2
michael@0	282	mov DWORD [edi+0*SIZEOF_DWORD], eax
michael@0	283	psrlq mmA,DWORD_BIT
michael@0	284	movd eax,mmA
michael@0	285	sub ecx, byte SIZEOF_DWORD
michael@0	286	add edi, byte SIZEOF_DWORD
michael@0	287	.column_st2:
michael@0	288	cmp ecx, byte SIZEOF_WORD
michael@0	289	jb short .column_st1
michael@0	290	mov WORD [edi+0*SIZEOF_WORD], ax
michael@0	291	shr eax,WORD_BIT
michael@0	292	sub ecx, byte SIZEOF_WORD
michael@0	293	add edi, byte SIZEOF_WORD
michael@0	294	.column_st1:
michael@0	295	cmp ecx, byte SIZEOF_BYTE
michael@0	296	jb short .nextrow
michael@0	297	mov BYTE [edi+0*SIZEOF_BYTE], al
michael@0	298
michael@0	299	%else ; RGB_PIXELSIZE == 4 ; -----------
michael@0	300
michael@0	301	%ifdef RGBX_FILLER_0XFF
michael@0	302	pcmpeqb mm6,mm6 ; mm6=(X0 X2 X4 X6 ** ** ** **)
michael@0	303	pcmpeqb mm7,mm7 ; mm7=(X1 X3 X5 X7 ** ** ** **)
michael@0	304	%else
michael@0	305	pxor mm6,mm6 ; mm6=(X0 X2 X4 X6 ** ** ** **)
michael@0	306	pxor mm7,mm7 ; mm7=(X1 X3 X5 X7 ** ** ** **)
michael@0	307	%endif
michael@0	308	; mmA=(00 02 04 06 ** ** ** **), mmB=(01 03 05 07 ** ** ** **)
michael@0	309	; mmC=(10 12 14 16 ** ** ** **), mmD=(11 13 15 17 ** ** ** **)
michael@0	310	; mmE=(20 22 24 26 ** ** ** **), mmF=(21 23 25 27 ** ** ** **)
michael@0	311	; mmG=(30 32 34 36 ** ** ** **), mmH=(31 33 35 37 ** ** ** **)
michael@0	312
michael@0	313	punpcklbw mmA,mmC ; mmA=(00 10 02 12 04 14 06 16)
michael@0	314	punpcklbw mmE,mmG ; mmE=(20 30 22 32 24 34 26 36)
michael@0	315	punpcklbw mmB,mmD ; mmB=(01 11 03 13 05 15 07 17)
michael@0	316	punpcklbw mmF,mmH ; mmF=(21 31 23 33 25 35 27 37)
michael@0	317
michael@0	318	movq mmC,mmA
michael@0	319	punpcklwd mmA,mmE ; mmA=(00 10 20 30 02 12 22 32)
michael@0	320	punpckhwd mmC,mmE ; mmC=(04 14 24 34 06 16 26 36)
michael@0	321	movq mmG,mmB
michael@0	322	punpcklwd mmB,mmF ; mmB=(01 11 21 31 03 13 23 33)
michael@0	323	punpckhwd mmG,mmF ; mmG=(05 15 25 35 07 17 27 37)
michael@0	324
michael@0	325	movq mmD,mmA
michael@0	326	punpckldq mmA,mmB ; mmA=(00 10 20 30 01 11 21 31)
michael@0	327	punpckhdq mmD,mmB ; mmD=(02 12 22 32 03 13 23 33)
michael@0	328	movq mmH,mmC
michael@0	329	punpckldq mmC,mmG ; mmC=(04 14 24 34 05 15 25 35)
michael@0	330	punpckhdq mmH,mmG ; mmH=(06 16 26 36 07 17 27 37)
michael@0	331
michael@0	332	cmp ecx, byte SIZEOF_MMWORD
michael@0	333	jb short .column_st16
michael@0	334
michael@0	335	movq MMWORD [edi+0*SIZEOF_MMWORD], mmA
michael@0	336	movq MMWORD [edi+1*SIZEOF_MMWORD], mmD
michael@0	337	movq MMWORD [edi+2*SIZEOF_MMWORD], mmC
michael@0	338	movq MMWORD [edi+3*SIZEOF_MMWORD], mmH
michael@0	339
michael@0	340	sub ecx, byte SIZEOF_MMWORD
michael@0	341	jz short .nextrow
michael@0	342
michael@0	343	add esi, byte SIZEOF_MMWORD ; inptr0
michael@0	344	add ebx, byte SIZEOF_MMWORD ; inptr1
michael@0	345	add edx, byte SIZEOF_MMWORD ; inptr2
michael@0	346	add edi, byte RGB_PIXELSIZE*SIZEOF_MMWORD ; outptr
michael@0	347	jmp near .columnloop
michael@0	348	alignx 16,7
michael@0	349
michael@0	350	.column_st16:
michael@0	351	cmp ecx, byte SIZEOF_MMWORD/2
michael@0	352	jb short .column_st8
michael@0	353	movq MMWORD [edi+0*SIZEOF_MMWORD], mmA
michael@0	354	movq MMWORD [edi+1*SIZEOF_MMWORD], mmD
michael@0	355	movq mmA,mmC
michael@0	356	movq mmD,mmH
michael@0	357	sub ecx, byte SIZEOF_MMWORD/2
michael@0	358	add edi, byte 2*SIZEOF_MMWORD
michael@0	359	.column_st8:
michael@0	360	cmp ecx, byte SIZEOF_MMWORD/4
michael@0	361	jb short .column_st4
michael@0	362	movq MMWORD [edi+0*SIZEOF_MMWORD], mmA
michael@0	363	movq mmA,mmD
michael@0	364	sub ecx, byte SIZEOF_MMWORD/4
michael@0	365	add edi, byte 1*SIZEOF_MMWORD
michael@0	366	.column_st4:
michael@0	367	cmp ecx, byte SIZEOF_MMWORD/8
michael@0	368	jb short .nextrow
michael@0	369	movd DWORD [edi+0*SIZEOF_DWORD], mmA
michael@0	370
michael@0	371	%endif ; RGB_PIXELSIZE ; ---------------
michael@0	372
michael@0	373	alignx 16,7
michael@0	374
michael@0	375	.nextrow:
michael@0	376	pop ecx
michael@0	377	pop esi
michael@0	378	pop ebx
michael@0	379	pop edx
michael@0	380	pop edi
michael@0	381	pop eax
michael@0	382
michael@0	383	add esi, byte SIZEOF_JSAMPROW
michael@0	384	add ebx, byte SIZEOF_JSAMPROW
michael@0	385	add edx, byte SIZEOF_JSAMPROW
michael@0	386	add edi, byte SIZEOF_JSAMPROW ; output_buf
michael@0	387	dec eax ; num_rows
michael@0	388	jg near .rowloop
michael@0	389
michael@0	390	emms ; empty MMX state
michael@0	391
michael@0	392	.return:
michael@0	393	pop edi
michael@0	394	pop esi
michael@0	395	; pop edx ; need not be preserved
michael@0	396	; pop ecx ; need not be preserved
michael@0	397	pop ebx
michael@0	398	mov esp,ebp ; esp <- aligned ebp
michael@0	399	pop esp ; esp <- original ebp
michael@0	400	pop ebp
michael@0	401	ret
michael@0	402
michael@0	403	; For some reason, the OS X linker does not honor the request to align the
michael@0	404	; segment unless we do this.
michael@0	405	align 16