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, 2016, 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, JSAMPIMAGE input_buf, 27 ; JDIMENSION input_row, JSAMPARRAY output_buf, 28 ; 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 39 ; xmmword wk[WK_NUM] 40 %define WK_NUM 2 41 %define gotptr wk(0) - SIZEOF_POINTER ; void * gotptr 42 43 align 32 44 GLOBAL_FUNCTION(jsimd_ycc_rgb_convert_sse2) 45 46 EXTN(jsimd_ycc_rgb_convert_sse2): 47 push ebp 48 mov eax, esp ; eax = original ebp 49 sub esp, byte 4 50 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 51 mov [esp], eax 52 mov ebp, esp ; ebp = aligned ebp 53 lea esp, [wk(0)] 54 pushpic eax ; make a room for GOT address 55 push ebx 56 ; push ecx ; need not be preserved 57 ; push edx ; need not be preserved 58 push esi 59 push edi 60 61 get_GOT ebx ; get GOT address 62 movpic POINTER [gotptr], ebx ; save GOT address 63 64 mov ecx, JDIMENSION [out_width(eax)] ; num_cols 65 test ecx, ecx 66 jz near .return 67 68 push ecx 69 70 mov edi, JSAMPIMAGE [input_buf(eax)] 71 mov ecx, JDIMENSION [input_row(eax)] 72 mov esi, JSAMPARRAY [edi+0*SIZEOF_JSAMPARRAY] 73 mov ebx, JSAMPARRAY [edi+1*SIZEOF_JSAMPARRAY] 74 mov edx, JSAMPARRAY [edi+2*SIZEOF_JSAMPARRAY] 75 lea esi, [esi+ecx*SIZEOF_JSAMPROW] 76 lea ebx, [ebx+ecx*SIZEOF_JSAMPROW] 77 lea edx, [edx+ecx*SIZEOF_JSAMPROW] 78 79 pop ecx 80 81 mov edi, JSAMPARRAY [output_buf(eax)] 82 mov eax, INT [num_rows(eax)] 83 test eax, eax 84 jle near .return 85 alignx 16, 7 86 .rowloop: 87 push eax 88 push edi 89 push edx 90 push ebx 91 push esi 92 push ecx ; col 93 94 mov esi, JSAMPROW [esi] ; inptr0 95 mov ebx, JSAMPROW [ebx] ; inptr1 96 mov edx, JSAMPROW [edx] ; inptr2 97 mov edi, JSAMPROW [edi] ; outptr 98 movpic eax, POINTER [gotptr] ; load GOT address (eax) 99 alignx 16, 7 100 .columnloop: 101 102 movdqa xmm5, XMMWORD [ebx] ; xmm5=Cb(0123456789ABCDEF) 103 movdqa xmm1, XMMWORD [edx] ; xmm1=Cr(0123456789ABCDEF) 104 105 pcmpeqw xmm4, xmm4 106 pcmpeqw xmm7, xmm7 107 psrlw xmm4, BYTE_BIT 108 psllw xmm7, 7 ; xmm7={0xFF80 0xFF80 0xFF80 0xFF80 ..} 109 movdqa xmm0, xmm4 ; xmm0=xmm4={0xFF 0x00 0xFF 0x00 ..} 110 111 pand xmm4, xmm5 ; xmm4=Cb(02468ACE)=CbE 112 psrlw xmm5, BYTE_BIT ; xmm5=Cb(13579BDF)=CbO 113 pand xmm0, xmm1 ; xmm0=Cr(02468ACE)=CrE 114 psrlw xmm1, BYTE_BIT ; xmm1=Cr(13579BDF)=CrO 115 116 paddw xmm4, xmm7 117 paddw xmm5, xmm7 118 paddw xmm0, xmm7 119 paddw xmm1, xmm7 120 121 ; (Original) 122 ; R = Y + 1.40200 * Cr 123 ; G = Y - 0.34414 * Cb - 0.71414 * Cr 124 ; B = Y + 1.77200 * Cb 125 ; 126 ; (This implementation) 127 ; R = Y + 0.40200 * Cr + Cr 128 ; G = Y - 0.34414 * Cb + 0.28586 * Cr - Cr 129 ; B = Y - 0.22800 * Cb + Cb + Cb 130 131 movdqa xmm2, xmm4 ; xmm2=CbE 132 movdqa xmm3, xmm5 ; xmm3=CbO 133 paddw xmm4, xmm4 ; xmm4=2*CbE 134 paddw xmm5, xmm5 ; xmm5=2*CbO 135 movdqa xmm6, xmm0 ; xmm6=CrE 136 movdqa xmm7, xmm1 ; xmm7=CrO 137 paddw xmm0, xmm0 ; xmm0=2*CrE 138 paddw xmm1, xmm1 ; xmm1=2*CrO 139 140 pmulhw xmm4, [GOTOFF(eax,PW_MF0228)] ; xmm4=(2*CbE * -FIX(0.22800)) 141 pmulhw xmm5, [GOTOFF(eax,PW_MF0228)] ; xmm5=(2*CbO * -FIX(0.22800)) 142 pmulhw xmm0, [GOTOFF(eax,PW_F0402)] ; xmm0=(2*CrE * FIX(0.40200)) 143 pmulhw xmm1, [GOTOFF(eax,PW_F0402)] ; xmm1=(2*CrO * FIX(0.40200)) 144 145 paddw xmm4, [GOTOFF(eax,PW_ONE)] 146 paddw xmm5, [GOTOFF(eax,PW_ONE)] 147 psraw xmm4, 1 ; xmm4=(CbE * -FIX(0.22800)) 148 psraw xmm5, 1 ; xmm5=(CbO * -FIX(0.22800)) 149 paddw xmm0, [GOTOFF(eax,PW_ONE)] 150 paddw xmm1, [GOTOFF(eax,PW_ONE)] 151 psraw xmm0, 1 ; xmm0=(CrE * FIX(0.40200)) 152 psraw xmm1, 1 ; xmm1=(CrO * FIX(0.40200)) 153 154 paddw xmm4, xmm2 155 paddw xmm5, xmm3 156 paddw xmm4, xmm2 ; xmm4=(CbE * FIX(1.77200))=(B-Y)E 157 paddw xmm5, xmm3 ; xmm5=(CbO * FIX(1.77200))=(B-Y)O 158 paddw xmm0, xmm6 ; xmm0=(CrE * FIX(1.40200))=(R-Y)E 159 paddw xmm1, xmm7 ; xmm1=(CrO * FIX(1.40200))=(R-Y)O 160 161 movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=(B-Y)E 162 movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(B-Y)O 163 164 movdqa xmm4, xmm2 165 movdqa xmm5, xmm3 166 punpcklwd xmm2, xmm6 167 punpckhwd xmm4, xmm6 168 pmaddwd xmm2, [GOTOFF(eax,PW_MF0344_F0285)] 169 pmaddwd xmm4, [GOTOFF(eax,PW_MF0344_F0285)] 170 punpcklwd xmm3, xmm7 171 punpckhwd xmm5, xmm7 172 pmaddwd xmm3, [GOTOFF(eax,PW_MF0344_F0285)] 173 pmaddwd xmm5, [GOTOFF(eax,PW_MF0344_F0285)] 174 175 paddd xmm2, [GOTOFF(eax,PD_ONEHALF)] 176 paddd xmm4, [GOTOFF(eax,PD_ONEHALF)] 177 psrad xmm2, SCALEBITS 178 psrad xmm4, SCALEBITS 179 paddd xmm3, [GOTOFF(eax,PD_ONEHALF)] 180 paddd xmm5, [GOTOFF(eax,PD_ONEHALF)] 181 psrad xmm3, SCALEBITS 182 psrad xmm5, SCALEBITS 183 184 packssdw xmm2, xmm4 ; xmm2=CbE*-FIX(0.344)+CrE*FIX(0.285) 185 packssdw xmm3, xmm5 ; xmm3=CbO*-FIX(0.344)+CrO*FIX(0.285) 186 psubw xmm2, xmm6 ; xmm2=CbE*-FIX(0.344)+CrE*-FIX(0.714)=(G-Y)E 187 psubw xmm3, xmm7 ; xmm3=CbO*-FIX(0.344)+CrO*-FIX(0.714)=(G-Y)O 188 189 movdqa xmm5, XMMWORD [esi] ; xmm5=Y(0123456789ABCDEF) 190 191 pcmpeqw xmm4, xmm4 192 psrlw xmm4, BYTE_BIT ; xmm4={0xFF 0x00 0xFF 0x00 ..} 193 pand xmm4, xmm5 ; xmm4=Y(02468ACE)=YE 194 psrlw xmm5, BYTE_BIT ; xmm5=Y(13579BDF)=YO 195 196 paddw xmm0, xmm4 ; xmm0=((R-Y)E+YE)=RE=R(02468ACE) 197 paddw xmm1, xmm5 ; xmm1=((R-Y)O+YO)=RO=R(13579BDF) 198 packuswb xmm0, xmm0 ; xmm0=R(02468ACE********) 199 packuswb xmm1, xmm1 ; xmm1=R(13579BDF********) 200 201 paddw xmm2, xmm4 ; xmm2=((G-Y)E+YE)=GE=G(02468ACE) 202 paddw xmm3, xmm5 ; xmm3=((G-Y)O+YO)=GO=G(13579BDF) 203 packuswb xmm2, xmm2 ; xmm2=G(02468ACE********) 204 packuswb xmm3, xmm3 ; xmm3=G(13579BDF********) 205 206 paddw xmm4, XMMWORD [wk(0)] ; xmm4=(YE+(B-Y)E)=BE=B(02468ACE) 207 paddw xmm5, XMMWORD [wk(1)] ; xmm5=(YO+(B-Y)O)=BO=B(13579BDF) 208 packuswb xmm4, xmm4 ; xmm4=B(02468ACE********) 209 packuswb xmm5, xmm5 ; xmm5=B(13579BDF********) 210 211 %if RGB_PIXELSIZE == 3 ; --------------- 212 213 ; xmmA=(00 02 04 06 08 0A 0C 0E **), xmmB=(01 03 05 07 09 0B 0D 0F **) 214 ; xmmC=(10 12 14 16 18 1A 1C 1E **), xmmD=(11 13 15 17 19 1B 1D 1F **) 215 ; xmmE=(20 22 24 26 28 2A 2C 2E **), xmmF=(21 23 25 27 29 2B 2D 2F **) 216 ; xmmG=(** ** ** ** ** ** ** ** **), xmmH=(** ** ** ** ** ** ** ** **) 217 218 punpcklbw xmmA, xmmC ; xmmA=(00 10 02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E) 219 punpcklbw xmmE, xmmB ; xmmE=(20 01 22 03 24 05 26 07 28 09 2A 0B 2C 0D 2E 0F) 220 punpcklbw xmmD, xmmF ; xmmD=(11 21 13 23 15 25 17 27 19 29 1B 2B 1D 2D 1F 2F) 221 222 movdqa xmmG, xmmA 223 movdqa xmmH, xmmA 224 punpcklwd xmmA, xmmE ; xmmA=(00 10 20 01 02 12 22 03 04 14 24 05 06 16 26 07) 225 punpckhwd xmmG, xmmE ; xmmG=(08 18 28 09 0A 1A 2A 0B 0C 1C 2C 0D 0E 1E 2E 0F) 226 227 psrldq xmmH, 2 ; xmmH=(02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E -- --) 228 psrldq xmmE, 2 ; xmmE=(22 03 24 05 26 07 28 09 2A 0B 2C 0D 2E 0F -- --) 229 230 movdqa xmmC, xmmD 231 movdqa xmmB, xmmD 232 punpcklwd xmmD, xmmH ; xmmD=(11 21 02 12 13 23 04 14 15 25 06 16 17 27 08 18) 233 punpckhwd xmmC, xmmH ; xmmC=(19 29 0A 1A 1B 2B 0C 1C 1D 2D 0E 1E 1F 2F -- --) 234 235 psrldq xmmB, 2 ; xmmB=(13 23 15 25 17 27 19 29 1B 2B 1D 2D 1F 2F -- --) 236 237 movdqa xmmF, xmmE 238 punpcklwd xmmE, xmmB ; xmmE=(22 03 13 23 24 05 15 25 26 07 17 27 28 09 19 29) 239 punpckhwd xmmF, xmmB ; xmmF=(2A 0B 1B 2B 2C 0D 1D 2D 2E 0F 1F 2F -- -- -- --) 240 241 pshufd xmmH, xmmA, 0x4E ; xmmH=(04 14 24 05 06 16 26 07 00 10 20 01 02 12 22 03) 242 movdqa xmmB, xmmE 243 punpckldq xmmA, xmmD ; xmmA=(00 10 20 01 11 21 02 12 02 12 22 03 13 23 04 14) 244 punpckldq xmmE, xmmH ; xmmE=(22 03 13 23 04 14 24 05 24 05 15 25 06 16 26 07) 245 punpckhdq xmmD, xmmB ; xmmD=(15 25 06 16 26 07 17 27 17 27 08 18 28 09 19 29) 246 247 pshufd xmmH, xmmG, 0x4E ; xmmH=(0C 1C 2C 0D 0E 1E 2E 0F 08 18 28 09 0A 1A 2A 0B) 248 movdqa xmmB, xmmF 249 punpckldq xmmG, xmmC ; xmmG=(08 18 28 09 19 29 0A 1A 0A 1A 2A 0B 1B 2B 0C 1C) 250 punpckldq xmmF, xmmH ; xmmF=(2A 0B 1B 2B 0C 1C 2C 0D 2C 0D 1D 2D 0E 1E 2E 0F) 251 punpckhdq xmmC, xmmB ; xmmC=(1D 2D 0E 1E 2E 0F 1F 2F 1F 2F -- -- -- -- -- --) 252 253 punpcklqdq xmmA, xmmE ; xmmA=(00 10 20 01 11 21 02 12 22 03 13 23 04 14 24 05) 254 punpcklqdq xmmD, xmmG ; xmmD=(15 25 06 16 26 07 17 27 08 18 28 09 19 29 0A 1A) 255 punpcklqdq xmmF, xmmC ; xmmF=(2A 0B 1B 2B 0C 1C 2C 0D 1D 2D 0E 1E 2E 0F 1F 2F) 256 257 cmp ecx, byte SIZEOF_XMMWORD 258 jb short .column_st32 259 260 test edi, SIZEOF_XMMWORD-1 261 jnz short .out1 262 ; --(aligned)------------------- 263 movntdq XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 264 movntdq XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 265 movntdq XMMWORD [edi+2*SIZEOF_XMMWORD], xmmF 266 jmp short .out0 267 .out1: ; --(unaligned)----------------- 268 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 269 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 270 movdqu XMMWORD [edi+2*SIZEOF_XMMWORD], xmmF 271 .out0: 272 add edi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr 273 sub ecx, byte SIZEOF_XMMWORD 274 jz near .nextrow 275 276 add esi, byte SIZEOF_XMMWORD ; inptr0 277 add ebx, byte SIZEOF_XMMWORD ; inptr1 278 add edx, byte SIZEOF_XMMWORD ; inptr2 279 jmp near .columnloop 280 alignx 16, 7 281 282 .column_st32: 283 lea ecx, [ecx+ecx*2] ; imul ecx, RGB_PIXELSIZE 284 cmp ecx, byte 2*SIZEOF_XMMWORD 285 jb short .column_st16 286 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 287 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 288 add edi, byte 2*SIZEOF_XMMWORD ; outptr 289 movdqa xmmA, xmmF 290 sub ecx, byte 2*SIZEOF_XMMWORD 291 jmp short .column_st15 292 .column_st16: 293 cmp ecx, byte SIZEOF_XMMWORD 294 jb short .column_st15 295 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 296 add edi, byte SIZEOF_XMMWORD ; outptr 297 movdqa xmmA, xmmD 298 sub ecx, byte SIZEOF_XMMWORD 299 .column_st15: 300 ; Store the lower 8 bytes of xmmA to the output when it has enough 301 ; space. 302 cmp ecx, byte SIZEOF_MMWORD 303 jb short .column_st7 304 movq XMM_MMWORD [edi], xmmA 305 add edi, byte SIZEOF_MMWORD 306 sub ecx, byte SIZEOF_MMWORD 307 psrldq xmmA, SIZEOF_MMWORD 308 .column_st7: 309 ; Store the lower 4 bytes of xmmA to the output when it has enough 310 ; space. 311 cmp ecx, byte SIZEOF_DWORD 312 jb short .column_st3 313 movd XMM_DWORD [edi], xmmA 314 add edi, byte SIZEOF_DWORD 315 sub ecx, byte SIZEOF_DWORD 316 psrldq xmmA, SIZEOF_DWORD 317 .column_st3: 318 ; Store the lower 2 bytes of eax to the output when it has enough 319 ; space. 320 movd eax, xmmA 321 cmp ecx, byte SIZEOF_WORD 322 jb short .column_st1 323 mov WORD [edi], ax 324 add edi, byte SIZEOF_WORD 325 sub ecx, byte SIZEOF_WORD 326 shr eax, 16 327 .column_st1: 328 ; Store the lower 1 byte of eax to the output when it has enough 329 ; space. 330 test ecx, ecx 331 jz short .nextrow 332 mov BYTE [edi], al 333 334 %else ; RGB_PIXELSIZE == 4 ; ----------- 335 336 %ifdef RGBX_FILLER_0XFF 337 pcmpeqb xmm6, xmm6 ; xmm6=XE=X(02468ACE********) 338 pcmpeqb xmm7, xmm7 ; xmm7=XO=X(13579BDF********) 339 %else 340 pxor xmm6, xmm6 ; xmm6=XE=X(02468ACE********) 341 pxor xmm7, xmm7 ; xmm7=XO=X(13579BDF********) 342 %endif 343 ; xmmA=(00 02 04 06 08 0A 0C 0E **), xmmB=(01 03 05 07 09 0B 0D 0F **) 344 ; xmmC=(10 12 14 16 18 1A 1C 1E **), xmmD=(11 13 15 17 19 1B 1D 1F **) 345 ; xmmE=(20 22 24 26 28 2A 2C 2E **), xmmF=(21 23 25 27 29 2B 2D 2F **) 346 ; xmmG=(30 32 34 36 38 3A 3C 3E **), xmmH=(31 33 35 37 39 3B 3D 3F **) 347 348 punpcklbw xmmA, xmmC ; xmmA=(00 10 02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E) 349 punpcklbw xmmE, xmmG ; xmmE=(20 30 22 32 24 34 26 36 28 38 2A 3A 2C 3C 2E 3E) 350 punpcklbw xmmB, xmmD ; xmmB=(01 11 03 13 05 15 07 17 09 19 0B 1B 0D 1D 0F 1F) 351 punpcklbw xmmF, xmmH ; xmmF=(21 31 23 33 25 35 27 37 29 39 2B 3B 2D 3D 2F 3F) 352 353 movdqa xmmC, xmmA 354 punpcklwd xmmA, xmmE ; xmmA=(00 10 20 30 02 12 22 32 04 14 24 34 06 16 26 36) 355 punpckhwd xmmC, xmmE ; xmmC=(08 18 28 38 0A 1A 2A 3A 0C 1C 2C 3C 0E 1E 2E 3E) 356 movdqa xmmG, xmmB 357 punpcklwd xmmB, xmmF ; xmmB=(01 11 21 31 03 13 23 33 05 15 25 35 07 17 27 37) 358 punpckhwd xmmG, xmmF ; xmmG=(09 19 29 39 0B 1B 2B 3B 0D 1D 2D 3D 0F 1F 2F 3F) 359 360 movdqa xmmD, xmmA 361 punpckldq xmmA, xmmB ; xmmA=(00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33) 362 punpckhdq xmmD, xmmB ; xmmD=(04 14 24 34 05 15 25 35 06 16 26 36 07 17 27 37) 363 movdqa xmmH, xmmC 364 punpckldq xmmC, xmmG ; xmmC=(08 18 28 38 09 19 29 39 0A 1A 2A 3A 0B 1B 2B 3B) 365 punpckhdq xmmH, xmmG ; xmmH=(0C 1C 2C 3C 0D 1D 2D 3D 0E 1E 2E 3E 0F 1F 2F 3F) 366 367 cmp ecx, byte SIZEOF_XMMWORD 368 jb short .column_st32 369 370 test edi, SIZEOF_XMMWORD-1 371 jnz short .out1 372 ; --(aligned)------------------- 373 movntdq XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 374 movntdq XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 375 movntdq XMMWORD [edi+2*SIZEOF_XMMWORD], xmmC 376 movntdq XMMWORD [edi+3*SIZEOF_XMMWORD], xmmH 377 jmp short .out0 378 .out1: ; --(unaligned)----------------- 379 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 380 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 381 movdqu XMMWORD [edi+2*SIZEOF_XMMWORD], xmmC 382 movdqu XMMWORD [edi+3*SIZEOF_XMMWORD], xmmH 383 .out0: 384 add edi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr 385 sub ecx, byte SIZEOF_XMMWORD 386 jz near .nextrow 387 388 add esi, byte SIZEOF_XMMWORD ; inptr0 389 add ebx, byte SIZEOF_XMMWORD ; inptr1 390 add edx, byte SIZEOF_XMMWORD ; inptr2 391 jmp near .columnloop 392 alignx 16, 7 393 394 .column_st32: 395 cmp ecx, byte SIZEOF_XMMWORD/2 396 jb short .column_st16 397 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 398 movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD 399 add edi, byte 2*SIZEOF_XMMWORD ; outptr 400 movdqa xmmA, xmmC 401 movdqa xmmD, xmmH 402 sub ecx, byte SIZEOF_XMMWORD/2 403 .column_st16: 404 cmp ecx, byte SIZEOF_XMMWORD/4 405 jb short .column_st15 406 movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA 407 add edi, byte SIZEOF_XMMWORD ; outptr 408 movdqa xmmA, xmmD 409 sub ecx, byte SIZEOF_XMMWORD/4 410 .column_st15: 411 ; Store two pixels (8 bytes) of xmmA to the output when it has enough 412 ; space. 413 cmp ecx, byte SIZEOF_XMMWORD/8 414 jb short .column_st7 415 movq XMM_MMWORD [edi], xmmA 416 add edi, byte SIZEOF_XMMWORD/8*4 417 sub ecx, byte SIZEOF_XMMWORD/8 418 psrldq xmmA, SIZEOF_XMMWORD/8*4 419 .column_st7: 420 ; Store one pixel (4 bytes) of xmmA to the output when it has enough 421 ; space. 422 test ecx, ecx 423 jz short .nextrow 424 movd XMM_DWORD [edi], xmmA 425 426 %endif ; RGB_PIXELSIZE ; --------------- 427 428 alignx 16, 7 429 430 .nextrow: 431 pop ecx 432 pop esi 433 pop ebx 434 pop edx 435 pop edi 436 pop eax 437 438 add esi, byte SIZEOF_JSAMPROW 439 add ebx, byte SIZEOF_JSAMPROW 440 add edx, byte SIZEOF_JSAMPROW 441 add edi, byte SIZEOF_JSAMPROW ; output_buf 442 dec eax ; num_rows 443 jg near .rowloop 444 445 sfence ; flush the write buffer 446 447 .return: 448 pop edi 449 pop esi 450 ; pop edx ; need not be preserved 451 ; pop ecx ; need not be preserved 452 pop ebx 453 mov esp, ebp ; esp <- aligned ebp 454 pop esp ; esp <- original ebp 455 pop ebp 456 ret 457 458 ; For some reason, the OS X linker does not honor the request to align the 459 ; segment unless we do this. 460 align 32 461
