1 ; 2 ; jdcolext.asm - colorspace conversion (SSE2) 3 ; 4 ; Copyright 2009, 2012 Pierre Ossman <ossman (a] cendio.se> for Cendio AB 5 ; Copyright (C) 2012, D. R. Commander. 6 ; 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 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 ; 17 ; [TAB8] 18 19 %include "jcolsamp.inc" 20 21 ; -------------------------------------------------------------------------- 22 ; 23 ; Convert some rows of samples to the output colorspace. 24 ; 25 ; GLOBAL(void) 26 ; jsimd_ycc_rgb_convert_sse2 (JDIMENSION out_width, 27 ; JSAMPIMAGE input_buf, JDIMENSION input_row, 28 ; JSAMPARRAY output_buf, int num_rows) 29 ; 30 31 %define out_width(b) (b)+8 ; JDIMENSION out_width 32 %define input_buf(b) (b)+12 ; JSAMPIMAGE input_buf 33 %define input_row(b) (b)+16 ; JDIMENSION input_row 34 %define output_buf(b) (b)+20 ; JSAMPARRAY output_buf 35 %define num_rows(b) (b)+24 ; int num_rows 36 37 %define original_ebp ebp+0 38 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] 39 %define WK_NUM 2 40 %define gotptr wk(0)-SIZEOF_POINTER ; void * gotptr 41 42 align 16 43 global EXTN(jsimd_ycc_rgb_convert_sse2) 44 45 EXTN(jsimd_ycc_rgb_convert_sse2): 46 push ebp 47 mov eax,esp ; eax = original ebp 48 sub esp, byte 4 49 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 50 mov [esp],eax 51 mov ebp,esp ; ebp = aligned ebp 52 lea esp, [wk(0)] 53 pushpic eax ; make a room for GOT address 54 push ebx 55 ; push ecx ; need not be preserved 56 ; push edx ; need not be preserved 57 push esi 58 push edi 59 60 get_GOT ebx ; get GOT address 61 movpic POINTER [gotptr], ebx ; save GOT address 62 63 mov ecx, JDIMENSION [out_width(eax)] ; num_cols 64 test ecx,ecx 65 jz near .return 66 67 push ecx 68 69 mov edi, JSAMPIMAGE [input_buf(eax)] 70 mov ecx, JDIMENSION [input_row(eax)] 71 mov esi, JSAMPARRAY [edi+0*SIZEOF_JSAMPARRAY] 72 mov ebx, JSAMPARRAY [edi+1*SIZEOF_JSAMPARRAY] 73 mov edx, JSAMPARRAY [edi+2*SIZEOF_JSAMPARRAY] 74 lea esi, [esi+ecx*SIZEOF_JSAMPROW] 75 lea ebx, [ebx+ecx*SIZEOF_JSAMPROW] 76 lea edx, [edx+ecx*SIZEOF_JSAMPROW] 77 78 pop ecx 79 80 mov edi, JSAMPARRAY [output_buf(eax)] 81 mov eax, INT [num_rows(eax)] 82 test eax,eax 83 jle near .return 84 alignx 16,7 85 .rowloop: 86 push eax 87 push edi 88 push edx 89 push ebx 90 push esi 91 push ecx ; col 92 93 mov esi, JSAMPROW [esi] ; inptr0 94 mov ebx, JSAMPROW [ebx] ; inptr1 95 mov edx, JSAMPROW [edx] ; inptr2 96 mov edi, JSAMPROW [edi] ; outptr 97 movpic eax, POINTER [gotptr] ; load GOT address (eax) 98 alignx 16,7 99 .columnloop: 100 101 movdqa xmm5, XMMWORD [ebx] ; xmm5=Cb(0123456789ABCDEF) 102 movdqa xmm1, XMMWORD [edx] ; xmm1=Cr(0123456789ABCDEF) 103 104 pcmpeqw xmm4,xmm4 105 pcmpeqw xmm7,xmm7 106 psrlw xmm4,BYTE_BIT 107 psllw xmm7,7 ; xmm7={0xFF80 0xFF80 0xFF80 0xFF80 ..} 108 movdqa xmm0,xmm4 ; xmm0=xmm4={0xFF 0x00 0xFF 0x00 ..} 109 110 pand xmm4,xmm5 ; xmm4=Cb(02468ACE)=CbE 111 psrlw xmm5,BYTE_BIT ; xmm5=Cb(13579BDF)=CbO 112 pand xmm0,xmm1 ; xmm0=Cr(02468ACE)=CrE 113 psrlw xmm1,BYTE_BIT ; xmm1=Cr(13579BDF)=CrO 114 115 paddw xmm4,xmm7 116 paddw xmm5,xmm7 117 paddw xmm0,xmm7 118 paddw xmm1,xmm7 119 120 ; (Original) 121 ; R = Y + 1.40200 * Cr 122 ; G = Y - 0.34414 * Cb - 0.71414 * Cr 123 ; B = Y + 1.77200 * Cb 124 ; 125 ; (This implementation) 126 ; R = Y + 0.40200 * Cr + Cr 127 ; G = Y - 0.34414 * Cb + 0.28586 * Cr - Cr 128 ; B = Y - 0.22800 * Cb + Cb + Cb 129 130 movdqa xmm2,xmm4 ; xmm2=CbE 131 movdqa xmm3,xmm5 ; xmm3=CbO 132 paddw xmm4,xmm4 ; xmm4=2*CbE 133 paddw xmm5,xmm5 ; xmm5=2*CbO 134 movdqa xmm6,xmm0 ; xmm6=CrE 135 movdqa xmm7,xmm1 ; xmm7=CrO 136 paddw xmm0,xmm0 ; xmm0=2*CrE 137 paddw xmm1,xmm1 ; xmm1=2*CrO 138 139 pmulhw xmm4,[GOTOFF(eax,PW_MF0228)] ; xmm4=(2*CbE * -FIX(0.22800)) 140 pmulhw xmm5,[GOTOFF(eax,PW_MF0228)] ; xmm5=(2*CbO * -FIX(0.22800)) 141 pmulhw xmm0,[GOTOFF(eax,PW_F0402)] ; xmm0=(2*CrE * FIX(0.40200)) 142 pmulhw xmm1,[GOTOFF(eax,PW_F0402)] ; xmm1=(2*CrO * FIX(0.40200)) 143 144 paddw xmm4,[GOTOFF(eax,PW_ONE)] 145 paddw xmm5,[GOTOFF(eax,PW_ONE)] 146 psraw xmm4,1 ; xmm4=(CbE * -FIX(0.22800)) 147 psraw xmm5,1 ; xmm5=(CbO * -FIX(0.22800)) 148 paddw xmm0,[GOTOFF(eax,PW_ONE)] 149 paddw xmm1,[GOTOFF(eax,PW_ONE)] 150 psraw xmm0,1 ; xmm0=(CrE * FIX(0.40200)) 151 psraw xmm1,1 ; xmm1=(CrO * FIX(0.40200)) 152 153 paddw xmm4,xmm2 154 paddw xmm5,xmm3 155 paddw xmm4,xmm2 ; xmm4=(CbE * FIX(1.77200))=(B-Y)E 156 paddw xmm5,xmm3 ; xmm5=(CbO * FIX(1.77200))=(B-Y)O 157 paddw xmm0,xmm6 ; xmm0=(CrE * FIX(1.40200))=(R-Y)E 158 paddw xmm1,xmm7 ; xmm1=(CrO * FIX(1.40200))=(R-Y)O 159 160 movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=(B-Y)E 161 movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(B-Y)O 162 163 movdqa xmm4,xmm2 164 movdqa xmm5,xmm3 165 punpcklwd xmm2,xmm6 166 punpckhwd xmm4,xmm6 167 pmaddwd xmm2,[GOTOFF(eax,PW_MF0344_F0285)] 168 pmaddwd xmm4,[GOTOFF(eax,PW_MF0344_F0285)] 169 punpcklwd xmm3,xmm7 170 punpckhwd xmm5,xmm7 171 pmaddwd xmm3,[GOTOFF(eax,PW_MF0344_F0285)] 172 pmaddwd xmm5,[GOTOFF(eax,PW_MF0344_F0285)] 173 174 paddd xmm2,[GOTOFF(eax,PD_ONEHALF)] 175 paddd xmm4,[GOTOFF(eax,PD_ONEHALF)] 176 psrad xmm2,SCALEBITS 177 psrad xmm4,SCALEBITS 178 paddd xmm3,[GOTOFF(eax,PD_ONEHALF)] 179 paddd xmm5,[GOTOFF(eax,PD_ONEHALF)] 180 psrad xmm3,SCALEBITS 181 psrad xmm5,SCALEBITS 182 183 packssdw xmm2,xmm4 ; xmm2=CbE*-FIX(0.344)+CrE*FIX(0.285) 184 packssdw xmm3,xmm5 ; xmm3=CbO*-FIX(0.344)+CrO*FIX(0.285) 185 psubw xmm2,xmm6 ; xmm2=CbE*-FIX(0.344)+CrE*-FIX(0.714)=(G-Y)E 186 psubw xmm3,xmm7 ; xmm3=CbO*-FIX(0.344)+CrO*-FIX(0.714)=(G-Y)O 187 188 movdqa xmm5, XMMWORD [esi] ; xmm5=Y(0123456789ABCDEF) 189 190 pcmpeqw xmm4,xmm4 191 psrlw xmm4,BYTE_BIT ; xmm4={0xFF 0x00 0xFF 0x00 ..} 192 pand xmm4,xmm5 ; xmm4=Y(02468ACE)=YE 193 psrlw xmm5,BYTE_BIT ; xmm5=Y(13579BDF)=YO 194 195 paddw xmm0,xmm4 ; xmm0=((R-Y)E+YE)=RE=R(02468ACE) 196 paddw xmm1,xmm5 ; xmm1=((R-Y)O+YO)=RO=R(13579BDF) 197 packuswb xmm0,xmm0 ; xmm0=R(02468ACE********) 198 packuswb xmm1,xmm1 ; xmm1=R(13579BDF********) 199 200 paddw xmm2,xmm4 ; xmm2=((G-Y)E+YE)=GE=G(02468ACE) 201 paddw xmm3,xmm5 ; xmm3=((G-Y)O+YO)=GO=G(13579BDF) 202 packuswb xmm2,xmm2 ; xmm2=G(02468ACE********) 203 packuswb xmm3,xmm3 ; xmm3=G(13579BDF********) 204 205 paddw xmm4, XMMWORD [wk(0)] ; xmm4=(YE+(B-Y)E)=BE=B(02468ACE) 206 paddw xmm5, XMMWORD [wk(1)] ; xmm5=(YO+(B-Y)O)=BO=B(13579BDF) 207 packuswb xmm4,xmm4 ; xmm4=B(02468ACE********) 208 packuswb xmm5,xmm5 ; xmm5=B(13579BDF********) 209 210 %if RGB_PIXELSIZE == 3 ; --------------- 211 212 ; xmmA=(00 02 04 06 08 0A 0C 0E **), xmmB=(01 03 05 07 09 0B 0D 0F **) 213 ; xmmC=(10 12 14 16 18 1A 1C 1E **), xmmD=(11 13 15 17 19 1B 1D 1F **) 214 ; xmmE=(20 22 24 26 28 2A 2C 2E **), xmmF=(21 23 25 27 29 2B 2D 2F **) 215 ; xmmG=(** ** ** ** ** ** ** ** **), xmmH=(** ** ** ** ** ** ** ** **) 216 217 punpcklbw xmmA,xmmC ; xmmA=(00 10 02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E) 218 punpcklbw xmmE,xmmB ; xmmE=(20 01 22 03 24 05 26 07 28 09 2A 0B 2C 0D 2E 0F) 219 punpcklbw xmmD,xmmF ; xmmD=(11 21 13 23 15 25 17 27 19 29 1B 2B 1D 2D 1F 2F) 220 221 movdqa xmmG,xmmA 222 movdqa xmmH,xmmA 223 punpcklwd xmmA,xmmE ; xmmA=(00 10 20 01 02 12 22 03 04 14 24 05 06 16 26 07) 224 punpckhwd xmmG,xmmE ; xmmG=(08 18 28 09 0A 1A 2A 0B 0C 1C 2C 0D 0E 1E 2E 0F) 225 226 psrldq xmmH,2 ; xmmH=(02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E -- --) 227 psrldq xmmE,2 ; xmmE=(22 03 24 05 26 07 28 09 2A 0B 2C 0D 2E 0F -- --) 228 229 movdqa xmmC,xmmD 230 movdqa xmmB,xmmD 231 punpcklwd xmmD,xmmH ; xmmD=(11 21 02 12 13 23 04 14 15 25 06 16 17 27 08 18) 232 punpckhwd xmmC,xmmH ; xmmC=(19 29 0A 1A 1B 2B 0C 1C 1D 2D 0E 1E 1F 2F -- --) 233 234 psrldq xmmB,2 ; xmmB=(13 23 15 25 17 27 19 29 1B 2B 1D 2D 1F 2F -- --) 235 236 movdqa xmmF,xmmE 237 punpcklwd xmmE,xmmB ; xmmE=(22 03 13 23 24 05 15 25 26 07 17 27 28 09 19 29) 238 punpckhwd xmmF,xmmB ; xmmF=(2A 0B 1B 2B 2C 0D 1D 2D 2E 0F 1F 2F -- -- -- --) 239 240 pshufd xmmH,xmmA,0x4E; xmmH=(04 14 24 05 06 16 26 07 00 10 20 01 02 12 22 03) 241 movdqa xmmB,xmmE 242 punpckldq xmmA,xmmD ; xmmA=(00 10 20 01 11 21 02 12 02 12 22 03 13 23 04 14) 243 punpckldq xmmE,xmmH ; xmmE=(22 03 13 23 04 14 24 05 24 05 15 25 06 16 26 07) 244 punpckhdq xmmD,xmmB ; xmmD=(15 25 06 16 26 07 17 27 17 27 08 18 28 09 19 29) 245 246 pshufd xmmH,xmmG,0x4E; xmmH=(0C 1C 2C 0D 0E 1E 2E 0F 08 18 28 09 0A 1A 2A 0B) 247 movdqa xmmB,xmmF 248 punpckldq xmmG,xmmC ; xmmG=(08 18 28 09 19 29 0A 1A 0A 1A 2A 0B 1B 2B 0C 1C) 249 punpckldq xmmF,xmmH ; xmmF=(2A 0B 1B 2B 0C 1C 2C 0D 2C 0D 1D 2D 0E 1E 2E 0F) 250 punpckhdq xmmC,xmmB ; xmmC=(1D 2D 0E 1E 2E 0F 1F 2F 1F 2F -- -- -- -- -- --) 251 252 punpcklqdq xmmA,xmmE ; xmmA=(00 10 20 01 11 21 02 12 22 03 13 23 04 14 24 05) 253 punpcklqdq xmmD,xmmG ; xmmD=(15 25 06 16 26 07 17 27 08 18 28 09 19 29 0A 1A) 254 punpcklqdq xmmF,xmmC ; xmmF=(2A 0B 1B 2B 0C 1C 2C 0D 1D 2D 0E 1E 2E 0F 1F 2F) 255 256 cmp ecx, byte SIZEOF_XMMWORD 257 jb short .column_st32 258 259 test edi, SIZEOF_XMMWORD-1 260 jnz short .out1 261 ; --(aligned)------------------- 262 movntdq XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 263 movntdq XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 264 movntdq XMMWORD [edi+2*SIZEOF_XMMWORD], xmmF 265 jmp short .out0 266 .out1: ; --(unaligned)----------------- 267 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 268 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 269 movdqu XMMWORD [edi+2*SIZEOF_XMMWORD], xmmF 270 .out0: 271 add edi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr 272 sub ecx, byte SIZEOF_XMMWORD 273 jz near .nextrow 274 275 add esi, byte SIZEOF_XMMWORD ; inptr0 276 add ebx, byte SIZEOF_XMMWORD ; inptr1 277 add edx, byte SIZEOF_XMMWORD ; inptr2 278 jmp near .columnloop 279 alignx 16,7 280 281 .column_st32: 282 lea ecx, [ecx+ecx*2] ; imul ecx, RGB_PIXELSIZE 283 cmp ecx, byte 2*SIZEOF_XMMWORD 284 jb short .column_st16 285 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 286 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 287 add edi, byte 2*SIZEOF_XMMWORD ; outptr 288 movdqa xmmA,xmmF 289 sub ecx, byte 2*SIZEOF_XMMWORD 290 jmp short .column_st15 291 .column_st16: 292 cmp ecx, byte SIZEOF_XMMWORD 293 jb short .column_st15 294 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 295 add edi, byte SIZEOF_XMMWORD ; outptr 296 movdqa xmmA,xmmD 297 sub ecx, byte SIZEOF_XMMWORD 298 .column_st15: 299 ; Store the lower 8 bytes of xmmA to the output when it has enough 300 ; space. 301 cmp ecx, byte SIZEOF_MMWORD 302 jb short .column_st7 303 movq XMM_MMWORD [edi], xmmA 304 add edi, byte SIZEOF_MMWORD 305 sub ecx, byte SIZEOF_MMWORD 306 psrldq xmmA, SIZEOF_MMWORD 307 .column_st7: 308 ; Store the lower 4 bytes of xmmA to the output when it has enough 309 ; space. 310 cmp ecx, byte SIZEOF_DWORD 311 jb short .column_st3 312 movd XMM_DWORD [edi], xmmA 313 add edi, byte SIZEOF_DWORD 314 sub ecx, byte SIZEOF_DWORD 315 psrldq xmmA, SIZEOF_DWORD 316 .column_st3: 317 ; Store the lower 2 bytes of eax to the output when it has enough 318 ; space. 319 movd eax, xmmA 320 cmp ecx, byte SIZEOF_WORD 321 jb short .column_st1 322 mov WORD [edi], ax 323 add edi, byte SIZEOF_WORD 324 sub ecx, byte SIZEOF_WORD 325 shr eax, 16 326 .column_st1: 327 ; Store the lower 1 byte of eax to the output when it has enough 328 ; space. 329 test ecx, ecx 330 jz short .nextrow 331 mov BYTE [edi], al 332 333 %else ; RGB_PIXELSIZE == 4 ; ----------- 334 335 %ifdef RGBX_FILLER_0XFF 336 pcmpeqb xmm6,xmm6 ; xmm6=XE=X(02468ACE********) 337 pcmpeqb xmm7,xmm7 ; xmm7=XO=X(13579BDF********) 338 %else 339 pxor xmm6,xmm6 ; xmm6=XE=X(02468ACE********) 340 pxor xmm7,xmm7 ; xmm7=XO=X(13579BDF********) 341 %endif 342 ; xmmA=(00 02 04 06 08 0A 0C 0E **), xmmB=(01 03 05 07 09 0B 0D 0F **) 343 ; xmmC=(10 12 14 16 18 1A 1C 1E **), xmmD=(11 13 15 17 19 1B 1D 1F **) 344 ; xmmE=(20 22 24 26 28 2A 2C 2E **), xmmF=(21 23 25 27 29 2B 2D 2F **) 345 ; xmmG=(30 32 34 36 38 3A 3C 3E **), xmmH=(31 33 35 37 39 3B 3D 3F **) 346 347 punpcklbw xmmA,xmmC ; xmmA=(00 10 02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E) 348 punpcklbw xmmE,xmmG ; xmmE=(20 30 22 32 24 34 26 36 28 38 2A 3A 2C 3C 2E 3E) 349 punpcklbw xmmB,xmmD ; xmmB=(01 11 03 13 05 15 07 17 09 19 0B 1B 0D 1D 0F 1F) 350 punpcklbw xmmF,xmmH ; xmmF=(21 31 23 33 25 35 27 37 29 39 2B 3B 2D 3D 2F 3F) 351 352 movdqa xmmC,xmmA 353 punpcklwd xmmA,xmmE ; xmmA=(00 10 20 30 02 12 22 32 04 14 24 34 06 16 26 36) 354 punpckhwd xmmC,xmmE ; xmmC=(08 18 28 38 0A 1A 2A 3A 0C 1C 2C 3C 0E 1E 2E 3E) 355 movdqa xmmG,xmmB 356 punpcklwd xmmB,xmmF ; xmmB=(01 11 21 31 03 13 23 33 05 15 25 35 07 17 27 37) 357 punpckhwd xmmG,xmmF ; xmmG=(09 19 29 39 0B 1B 2B 3B 0D 1D 2D 3D 0F 1F 2F 3F) 358 359 movdqa xmmD,xmmA 360 punpckldq xmmA,xmmB ; xmmA=(00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33) 361 punpckhdq xmmD,xmmB ; xmmD=(04 14 24 34 05 15 25 35 06 16 26 36 07 17 27 37) 362 movdqa xmmH,xmmC 363 punpckldq xmmC,xmmG ; xmmC=(08 18 28 38 09 19 29 39 0A 1A 2A 3A 0B 1B 2B 3B) 364 punpckhdq xmmH,xmmG ; xmmH=(0C 1C 2C 3C 0D 1D 2D 3D 0E 1E 2E 3E 0F 1F 2F 3F) 365 366 cmp ecx, byte SIZEOF_XMMWORD 367 jb short .column_st32 368 369 test edi, SIZEOF_XMMWORD-1 370 jnz short .out1 371 ; --(aligned)------------------- 372 movntdq XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 373 movntdq XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 374 movntdq XMMWORD [edi+2*SIZEOF_XMMWORD], xmmC 375 movntdq XMMWORD [edi+3*SIZEOF_XMMWORD], xmmH 376 jmp short .out0 377 .out1: ; --(unaligned)----------------- 378 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 379 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 380 movdqu XMMWORD [edi+2*SIZEOF_XMMWORD], xmmC 381 movdqu XMMWORD [edi+3*SIZEOF_XMMWORD], xmmH 382 .out0: 383 add edi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr 384 sub ecx, byte SIZEOF_XMMWORD 385 jz near .nextrow 386 387 add esi, byte SIZEOF_XMMWORD ; inptr0 388 add ebx, byte SIZEOF_XMMWORD ; inptr1 389 add edx, byte SIZEOF_XMMWORD ; inptr2 390 jmp near .columnloop 391 alignx 16,7 392 393 .column_st32: 394 cmp ecx, byte SIZEOF_XMMWORD/2 395 jb short .column_st16 396 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 397 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 398 add edi, byte 2*SIZEOF_XMMWORD ; outptr 399 movdqa xmmA,xmmC 400 movdqa xmmD,xmmH 401 sub ecx, byte SIZEOF_XMMWORD/2 402 .column_st16: 403 cmp ecx, byte SIZEOF_XMMWORD/4 404 jb short .column_st15 405 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 406 add edi, byte SIZEOF_XMMWORD ; outptr 407 movdqa xmmA,xmmD 408 sub ecx, byte SIZEOF_XMMWORD/4 409 .column_st15: 410 ; Store two pixels (8 bytes) of xmmA to the output when it has enough 411 ; space. 412 cmp ecx, byte SIZEOF_XMMWORD/8 413 jb short .column_st7 414 movq XMM_MMWORD [edi], xmmA 415 add edi, byte SIZEOF_XMMWORD/8*4 416 sub ecx, byte SIZEOF_XMMWORD/8 417 psrldq xmmA, SIZEOF_XMMWORD/8*4 418 .column_st7: 419 ; Store one pixel (4 bytes) of xmmA to the output when it has enough 420 ; space. 421 test ecx, ecx 422 jz short .nextrow 423 movd XMM_DWORD [edi], xmmA 424 425 %endif ; RGB_PIXELSIZE ; --------------- 426 427 alignx 16,7 428 429 .nextrow: 430 pop ecx 431 pop esi 432 pop ebx 433 pop edx 434 pop edi 435 pop eax 436 437 add esi, byte SIZEOF_JSAMPROW 438 add ebx, byte SIZEOF_JSAMPROW 439 add edx, byte SIZEOF_JSAMPROW 440 add edi, byte SIZEOF_JSAMPROW ; output_buf 441 dec eax ; num_rows 442 jg near .rowloop 443 444 sfence ; flush the write buffer 445 446 .return: 447 pop edi 448 pop esi 449 ; pop edx ; need not be preserved 450 ; pop ecx ; need not be preserved 451 pop ebx 452 mov esp,ebp ; esp <- aligned ebp 453 pop esp ; esp <- original ebp 454 pop ebp 455 ret 456 457 ; For some reason, the OS X linker does not honor the request to align the 458 ; segment unless we do this. 459 align 16 460
