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gerrit-public.fairphone.software / platform / external / libjpeg-turbo / b2817f52517361caff3dbab7373abc1b791f3246 / . / simd / jcsample-sse2.asm
blob: 11202dbf68d916ef01abb4d758788c2338e01d24 [file] [log] [blame]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]1;
DRC72130be2014-05-09 20:14:26 +0000[diff] [blame]2; jcsample.asm - downsampling (SSE2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]3;
Pierre Ossmaneea72152009-03-09 13:34:17 +0000[diff] [blame]4; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
5;
6; Based on
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]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
10;
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
16;
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]17; [TAB8]
18
Pierre Ossman3a65ef42009-03-16 13:34:18 +0000[diff] [blame]19%include "jsimdext.inc"
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]20
21; --------------------------------------------------------------------------
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]22 SECTION SEG_TEXT
23 BITS 32
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]24;
25; Downsample pixel values of a single component.
26; This version handles the common case of 2:1 horizontal and 1:1 vertical,
27; without smoothing.
28;
29; GLOBAL(void)
Pierre Ossmaneea72152009-03-09 13:34:17 +0000[diff] [blame]30; jsimd_h2v1_downsample_sse2 (JDIMENSION image_width, int max_v_samp_factor,
31; JDIMENSION v_samp_factor, JDIMENSION width_blocks,
32; JSAMPARRAY input_data, JSAMPARRAY output_data);
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]33;
34
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]35%define img_width(b) (b)+8 ; JDIMENSION image_width
36%define max_v_samp(b) (b)+12 ; int max_v_samp_factor
37%define v_samp(b) (b)+16 ; JDIMENSION v_samp_factor
38%define width_blks(b) (b)+20 ; JDIMENSION width_blocks
39%define input_data(b) (b)+24 ; JSAMPARRAY input_data
40%define output_data(b) (b)+28 ; JSAMPARRAY output_data
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]41
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]42 align 16
43 global EXTN(jsimd_h2v1_downsample_sse2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]44
Pierre Ossmaneea72152009-03-09 13:34:17 +0000[diff] [blame]45EXTN(jsimd_h2v1_downsample_sse2):
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]46 push ebp
47 mov ebp,esp
48; push ebx ; unused
49; push ecx ; need not be preserved
50; push edx ; need not be preserved
51 push esi
52 push edi
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]53
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]54 mov ecx, JDIMENSION [width_blks(ebp)]
55 shl ecx,3 ; imul ecx,DCTSIZE (ecx = output_cols)
56 jz near .return
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]57
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]58 mov edx, JDIMENSION [img_width(ebp)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]59
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]60 ; -- expand_right_edge
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]61
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]62 push ecx
63 shl ecx,1 ; output_cols * 2
64 sub ecx,edx
65 jle short .expand_end
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]66
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]67 mov eax, INT [max_v_samp(ebp)]
68 test eax,eax
69 jle short .expand_end
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]70
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]71 cld
72 mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
73 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]74.expandloop:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]75 push eax
76 push ecx
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]77
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]78 mov edi, JSAMPROW [esi]
79 add edi,edx
80 mov al, JSAMPLE [edi-1]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]81
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]82 rep stosb
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]83
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]84 pop ecx
85 pop eax
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]86
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]87 add esi, byte SIZEOF_JSAMPROW
88 dec eax
89 jg short .expandloop
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]90
91.expand_end:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]92 pop ecx ; output_cols
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]93
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]94 ; -- h2v1_downsample
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]95
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]96 mov eax, JDIMENSION [v_samp(ebp)] ; rowctr
97 test eax,eax
98 jle near .return
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]99
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]100 mov edx, 0x00010000 ; bias pattern
101 movd xmm7,edx
102 pcmpeqw xmm6,xmm6
103 pshufd xmm7,xmm7,0x00 ; xmm7={0, 1, 0, 1, 0, 1, 0, 1}
104 psrlw xmm6,BYTE_BIT ; xmm6={0xFF 0x00 0xFF 0x00 ..}
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]105
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]106 mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
107 mov edi, JSAMPARRAY [output_data(ebp)] ; output_data
108 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]109.rowloop:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]110 push ecx
111 push edi
112 push esi
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]113
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]114 mov esi, JSAMPROW [esi] ; inptr
115 mov edi, JSAMPROW [edi] ; outptr
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]116
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]117 cmp ecx, byte SIZEOF_XMMWORD
118 jae short .columnloop
119 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]120
121.columnloop_r8:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]122 movdqa xmm0, XMMWORD [esi+0*SIZEOF_XMMWORD]
123 pxor xmm1,xmm1
124 mov ecx, SIZEOF_XMMWORD
125 jmp short .downsample
126 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]127
128.columnloop:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]129 movdqa xmm0, XMMWORD [esi+0*SIZEOF_XMMWORD]
130 movdqa xmm1, XMMWORD [esi+1*SIZEOF_XMMWORD]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]131
132.downsample:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]133 movdqa xmm2,xmm0
134 movdqa xmm3,xmm1
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]135
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]136 pand xmm0,xmm6
137 psrlw xmm2,BYTE_BIT
138 pand xmm1,xmm6
139 psrlw xmm3,BYTE_BIT
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]140
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]141 paddw xmm0,xmm2
142 paddw xmm1,xmm3
143 paddw xmm0,xmm7
144 paddw xmm1,xmm7
145 psrlw xmm0,1
146 psrlw xmm1,1
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]147
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]148 packuswb xmm0,xmm1
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]149
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]150 movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm0
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]151
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]152 sub ecx, byte SIZEOF_XMMWORD ; outcol
153 add esi, byte 2*SIZEOF_XMMWORD ; inptr
154 add edi, byte 1*SIZEOF_XMMWORD ; outptr
155 cmp ecx, byte SIZEOF_XMMWORD
156 jae short .columnloop
157 test ecx,ecx
158 jnz short .columnloop_r8
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]159
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]160 pop esi
161 pop edi
162 pop ecx
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]163
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]164 add esi, byte SIZEOF_JSAMPROW ; input_data
165 add edi, byte SIZEOF_JSAMPROW ; output_data
166 dec eax ; rowctr
167 jg near .rowloop
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]168
169.return:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]170 pop edi
171 pop esi
172; pop edx ; need not be preserved
173; pop ecx ; need not be preserved
174; pop ebx ; unused
175 pop ebp
176 ret
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]177
178; --------------------------------------------------------------------------
179;
180; Downsample pixel values of a single component.
181; This version handles the standard case of 2:1 horizontal and 2:1 vertical,
182; without smoothing.
183;
184; GLOBAL(void)
Pierre Ossmaneea72152009-03-09 13:34:17 +0000[diff] [blame]185; jsimd_h2v2_downsample_sse2 (JDIMENSION image_width, int max_v_samp_factor,
186; JDIMENSION v_samp_factor, JDIMENSION width_blocks,
187; JSAMPARRAY input_data, JSAMPARRAY output_data);
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]188;
189
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]190%define img_width(b) (b)+8 ; JDIMENSION image_width
191%define max_v_samp(b) (b)+12 ; int max_v_samp_factor
192%define v_samp(b) (b)+16 ; JDIMENSION v_samp_factor
193%define width_blks(b) (b)+20 ; JDIMENSION width_blocks
194%define input_data(b) (b)+24 ; JSAMPARRAY input_data
195%define output_data(b) (b)+28 ; JSAMPARRAY output_data
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]196
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]197 align 16
198 global EXTN(jsimd_h2v2_downsample_sse2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]199
Pierre Ossmaneea72152009-03-09 13:34:17 +0000[diff] [blame]200EXTN(jsimd_h2v2_downsample_sse2):
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]201 push ebp
202 mov ebp,esp
203; push ebx ; unused
204; push ecx ; need not be preserved
205; push edx ; need not be preserved
206 push esi
207 push edi
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]208
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]209 mov ecx, JDIMENSION [width_blks(ebp)]
210 shl ecx,3 ; imul ecx,DCTSIZE (ecx = output_cols)
211 jz near .return
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]212
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]213 mov edx, JDIMENSION [img_width(ebp)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]214
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]215 ; -- expand_right_edge
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]216
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]217 push ecx
218 shl ecx,1 ; output_cols * 2
219 sub ecx,edx
220 jle short .expand_end
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]221
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]222 mov eax, INT [max_v_samp(ebp)]
223 test eax,eax
224 jle short .expand_end
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]225
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]226 cld
227 mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
228 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]229.expandloop:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]230 push eax
231 push ecx
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]232
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]233 mov edi, JSAMPROW [esi]
234 add edi,edx
235 mov al, JSAMPLE [edi-1]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]236
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]237 rep stosb
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]238
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]239 pop ecx
240 pop eax
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]241
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]242 add esi, byte SIZEOF_JSAMPROW
243 dec eax
244 jg short .expandloop
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]245
246.expand_end:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]247 pop ecx ; output_cols
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]248
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]249 ; -- h2v2_downsample
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]250
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]251 mov eax, JDIMENSION [v_samp(ebp)] ; rowctr
252 test eax,eax
253 jle near .return
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]254
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]255 mov edx, 0x00020001 ; bias pattern
256 movd xmm7,edx
257 pcmpeqw xmm6,xmm6
258 pshufd xmm7,xmm7,0x00 ; xmm7={1, 2, 1, 2, 1, 2, 1, 2}
259 psrlw xmm6,BYTE_BIT ; xmm6={0xFF 0x00 0xFF 0x00 ..}
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]260
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]261 mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
262 mov edi, JSAMPARRAY [output_data(ebp)] ; output_data
263 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]264.rowloop:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]265 push ecx
266 push edi
267 push esi
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]268
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]269 mov edx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; inptr0
270 mov esi, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; inptr1
271 mov edi, JSAMPROW [edi] ; outptr
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]272
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]273 cmp ecx, byte SIZEOF_XMMWORD
274 jae short .columnloop
275 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]276
277.columnloop_r8:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]278 movdqa xmm0, XMMWORD [edx+0*SIZEOF_XMMWORD]
279 movdqa xmm1, XMMWORD [esi+0*SIZEOF_XMMWORD]
280 pxor xmm2,xmm2
281 pxor xmm3,xmm3
282 mov ecx, SIZEOF_XMMWORD
283 jmp short .downsample
284 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]285
286.columnloop:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]287 movdqa xmm0, XMMWORD [edx+0*SIZEOF_XMMWORD]
288 movdqa xmm1, XMMWORD [esi+0*SIZEOF_XMMWORD]
289 movdqa xmm2, XMMWORD [edx+1*SIZEOF_XMMWORD]
290 movdqa xmm3, XMMWORD [esi+1*SIZEOF_XMMWORD]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]291
292.downsample:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]293 movdqa xmm4,xmm0
294 movdqa xmm5,xmm1
295 pand xmm0,xmm6
296 psrlw xmm4,BYTE_BIT
297 pand xmm1,xmm6
298 psrlw xmm5,BYTE_BIT
299 paddw xmm0,xmm4
300 paddw xmm1,xmm5
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]301
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]302 movdqa xmm4,xmm2
303 movdqa xmm5,xmm3
304 pand xmm2,xmm6
305 psrlw xmm4,BYTE_BIT
306 pand xmm3,xmm6
307 psrlw xmm5,BYTE_BIT
308 paddw xmm2,xmm4
309 paddw xmm3,xmm5
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]310
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]311 paddw xmm0,xmm1
312 paddw xmm2,xmm3
313 paddw xmm0,xmm7
314 paddw xmm2,xmm7
315 psrlw xmm0,2
316 psrlw xmm2,2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]317
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]318 packuswb xmm0,xmm2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]319
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]320 movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm0
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]321
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]322 sub ecx, byte SIZEOF_XMMWORD ; outcol
323 add edx, byte 2*SIZEOF_XMMWORD ; inptr0
324 add esi, byte 2*SIZEOF_XMMWORD ; inptr1
325 add edi, byte 1*SIZEOF_XMMWORD ; outptr
326 cmp ecx, byte SIZEOF_XMMWORD
327 jae near .columnloop
328 test ecx,ecx
329 jnz near .columnloop_r8
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]330
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]331 pop esi
332 pop edi
333 pop ecx
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]334
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]335 add esi, byte 2*SIZEOF_JSAMPROW ; input_data
336 add edi, byte 1*SIZEOF_JSAMPROW ; output_data
337 dec eax ; rowctr
338 jg near .rowloop
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]339
340.return:
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]341 pop edi
342 pop esi
343; pop edx ; need not be preserved
344; pop ecx ; need not be preserved
345; pop ebx ; unused
346 pop ebp
347 ret
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]348
DRC132b5fd2009-10-08 09:04:56 +0000[diff] [blame]349; For some reason, the OS X linker does not honor the request to align the
350; segment unless we do this.
DRCe5eaf372014-05-09 18:00:32 +0000[diff] [blame]351 align 16