1 ; 2 ; jisseflt.asm - floating-point IDCT (SSE & MMX) 3 ; 4 ; Copyright 2009 Pierre Ossman <ossman (a] cendio.se> for Cendio AB 5 ; 6 ; Based on 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 ; 17 ; This file contains a floating-point implementation of the inverse DCT 18 ; (Discrete Cosine Transform). The following code is based directly on 19 ; the IJG's original jidctflt.c; see the jidctflt.c for more details. 20 ; 21 ; [TAB8] 22 23 %include "jsimdext.inc" 24 %include "jdct.inc" 25 26 ; -------------------------------------------------------------------------- 27 28 %macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5) 29 shufps %1,%2,0x44 30 %endmacro 31 32 %macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7) 33 shufps %1,%2,0xEE 34 %endmacro 35 36 ; -------------------------------------------------------------------------- 37 SECTION SEG_CONST 38 39 alignz 16 40 global EXTN(jconst_idct_float_sse) PRIVATE 41 42 EXTN(jconst_idct_float_sse): 43 44 PD_1_414 times 4 dd 1.414213562373095048801689 45 PD_1_847 times 4 dd 1.847759065022573512256366 46 PD_1_082 times 4 dd 1.082392200292393968799446 47 PD_M2_613 times 4 dd -2.613125929752753055713286 48 PD_0_125 times 4 dd 0.125 ; 1/8 49 PB_CENTERJSAMP times 8 db CENTERJSAMPLE 50 51 alignz 16 52 53 ; -------------------------------------------------------------------------- 54 SECTION SEG_TEXT 55 BITS 32 56 ; 57 ; Perform dequantization and inverse DCT on one block of coefficients. 58 ; 59 ; GLOBAL(void) 60 ; jsimd_idct_float_sse (void * dct_table, JCOEFPTR coef_block, 61 ; JSAMPARRAY output_buf, JDIMENSION output_col) 62 ; 63 64 %define dct_table(b) (b)+8 ; void * dct_table 65 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block 66 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf 67 %define output_col(b) (b)+20 ; JDIMENSION output_col 68 69 %define original_ebp ebp+0 70 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] 71 %define WK_NUM 2 72 %define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT 73 ; FAST_FLOAT workspace[DCTSIZE2] 74 75 align 16 76 global EXTN(jsimd_idct_float_sse) PRIVATE 77 78 EXTN(jsimd_idct_float_sse): 79 push ebp 80 mov eax,esp ; eax = original ebp 81 sub esp, byte 4 82 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 83 mov [esp],eax 84 mov ebp,esp ; ebp = aligned ebp 85 lea esp, [workspace] 86 push ebx 87 ; push ecx ; need not be preserved 88 ; push edx ; need not be preserved 89 push esi 90 push edi 91 92 get_GOT ebx ; get GOT address 93 94 ; ---- Pass 1: process columns from input, store into work array. 95 96 ; mov eax, [original_ebp] 97 mov edx, POINTER [dct_table(eax)] ; quantptr 98 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 99 lea edi, [workspace] ; FAST_FLOAT * wsptr 100 mov ecx, DCTSIZE/4 ; ctr 101 alignx 16,7 102 .columnloop: 103 %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE 104 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 105 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 106 jnz near .columnDCT 107 108 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 109 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 110 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 111 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 112 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 113 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 114 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 115 por mm1,mm0 116 packsswb mm1,mm1 117 movd eax,mm1 118 test eax,eax 119 jnz short .columnDCT 120 121 ; -- AC terms all zero 122 123 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 124 125 punpckhwd mm1,mm0 ; mm1=(** 02 ** 03) 126 punpcklwd mm0,mm0 ; mm0=(00 00 01 01) 127 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in0H=(02 03) 128 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01) 129 cvtpi2ps xmm3,mm1 ; xmm3=(02 03 ** **) 130 cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **) 131 movlhps xmm0,xmm3 ; xmm0=in0=(00 01 02 03) 132 133 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 134 135 movaps xmm1,xmm0 136 movaps xmm2,xmm0 137 movaps xmm3,xmm0 138 139 shufps xmm0,xmm0,0x00 ; xmm0=(00 00 00 00) 140 shufps xmm1,xmm1,0x55 ; xmm1=(01 01 01 01) 141 shufps xmm2,xmm2,0xAA ; xmm2=(02 02 02 02) 142 shufps xmm3,xmm3,0xFF ; xmm3=(03 03 03 03) 143 144 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0 145 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0 146 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1 147 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1 148 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2 149 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2 150 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3 151 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3 152 jmp near .nextcolumn 153 alignx 16,7 154 %endif 155 .columnDCT: 156 157 ; -- Even part 158 159 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 160 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 161 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 162 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 163 164 punpckhwd mm4,mm0 ; mm4=(** 02 ** 03) 165 punpcklwd mm0,mm0 ; mm0=(00 00 01 01) 166 punpckhwd mm5,mm1 ; mm5=(** 22 ** 23) 167 punpcklwd mm1,mm1 ; mm1=(20 20 21 21) 168 169 psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in0H=(02 03) 170 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01) 171 cvtpi2ps xmm4,mm4 ; xmm4=(02 03 ** **) 172 cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **) 173 psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in2H=(22 23) 174 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in2L=(20 21) 175 cvtpi2ps xmm5,mm5 ; xmm5=(22 23 ** **) 176 cvtpi2ps xmm1,mm1 ; xmm1=(20 21 ** **) 177 178 punpckhwd mm6,mm2 ; mm6=(** 42 ** 43) 179 punpcklwd mm2,mm2 ; mm2=(40 40 41 41) 180 punpckhwd mm7,mm3 ; mm7=(** 62 ** 63) 181 punpcklwd mm3,mm3 ; mm3=(60 60 61 61) 182 183 psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in4H=(42 43) 184 psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in4L=(40 41) 185 cvtpi2ps xmm6,mm6 ; xmm6=(42 43 ** **) 186 cvtpi2ps xmm2,mm2 ; xmm2=(40 41 ** **) 187 psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in6H=(62 63) 188 psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in6L=(60 61) 189 cvtpi2ps xmm7,mm7 ; xmm7=(62 63 ** **) 190 cvtpi2ps xmm3,mm3 ; xmm3=(60 61 ** **) 191 192 movlhps xmm0,xmm4 ; xmm0=in0=(00 01 02 03) 193 movlhps xmm1,xmm5 ; xmm1=in2=(20 21 22 23) 194 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 195 mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 196 197 movlhps xmm2,xmm6 ; xmm2=in4=(40 41 42 43) 198 movlhps xmm3,xmm7 ; xmm3=in6=(60 61 62 63) 199 mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 200 mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 201 202 movaps xmm4,xmm0 203 movaps xmm5,xmm1 204 subps xmm0,xmm2 ; xmm0=tmp11 205 subps xmm1,xmm3 206 addps xmm4,xmm2 ; xmm4=tmp10 207 addps xmm5,xmm3 ; xmm5=tmp13 208 209 mulps xmm1,[GOTOFF(ebx,PD_1_414)] 210 subps xmm1,xmm5 ; xmm1=tmp12 211 212 movaps xmm6,xmm4 213 movaps xmm7,xmm0 214 subps xmm4,xmm5 ; xmm4=tmp3 215 subps xmm0,xmm1 ; xmm0=tmp2 216 addps xmm6,xmm5 ; xmm6=tmp0 217 addps xmm7,xmm1 ; xmm7=tmp1 218 219 movaps XMMWORD [wk(1)], xmm4 ; tmp3 220 movaps XMMWORD [wk(0)], xmm0 ; tmp2 221 222 ; -- Odd part 223 224 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 225 movq mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 226 movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 227 movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 228 229 punpckhwd mm6,mm4 ; mm6=(** 12 ** 13) 230 punpcklwd mm4,mm4 ; mm4=(10 10 11 11) 231 punpckhwd mm2,mm0 ; mm2=(** 32 ** 33) 232 punpcklwd mm0,mm0 ; mm0=(30 30 31 31) 233 234 psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in1H=(12 13) 235 psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in1L=(10 11) 236 cvtpi2ps xmm4,mm6 ; xmm4=(12 13 ** **) 237 cvtpi2ps xmm2,mm4 ; xmm2=(10 11 ** **) 238 psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in3H=(32 33) 239 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in3L=(30 31) 240 cvtpi2ps xmm0,mm2 ; xmm0=(32 33 ** **) 241 cvtpi2ps xmm3,mm0 ; xmm3=(30 31 ** **) 242 243 punpckhwd mm7,mm5 ; mm7=(** 52 ** 53) 244 punpcklwd mm5,mm5 ; mm5=(50 50 51 51) 245 punpckhwd mm3,mm1 ; mm3=(** 72 ** 73) 246 punpcklwd mm1,mm1 ; mm1=(70 70 71 71) 247 248 movlhps xmm2,xmm4 ; xmm2=in1=(10 11 12 13) 249 movlhps xmm3,xmm0 ; xmm3=in3=(30 31 32 33) 250 251 psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in5H=(52 53) 252 psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in5L=(50 51) 253 cvtpi2ps xmm4,mm7 ; xmm4=(52 53 ** **) 254 cvtpi2ps xmm5,mm5 ; xmm5=(50 51 ** **) 255 psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in7H=(72 73) 256 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in7L=(70 71) 257 cvtpi2ps xmm0,mm3 ; xmm0=(72 73 ** **) 258 cvtpi2ps xmm1,mm1 ; xmm1=(70 71 ** **) 259 260 mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 261 mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 262 263 movlhps xmm5,xmm4 ; xmm5=in5=(50 51 52 53) 264 movlhps xmm1,xmm0 ; xmm1=in7=(70 71 72 73) 265 mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 266 mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 267 268 movaps xmm4,xmm2 269 movaps xmm0,xmm5 270 addps xmm2,xmm1 ; xmm2=z11 271 addps xmm5,xmm3 ; xmm5=z13 272 subps xmm4,xmm1 ; xmm4=z12 273 subps xmm0,xmm3 ; xmm0=z10 274 275 movaps xmm1,xmm2 276 subps xmm2,xmm5 277 addps xmm1,xmm5 ; xmm1=tmp7 278 279 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11 280 281 movaps xmm3,xmm0 282 addps xmm0,xmm4 283 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5 284 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930) 285 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200) 286 addps xmm3,xmm0 ; xmm3=tmp12 287 subps xmm4,xmm0 ; xmm4=tmp10 288 289 ; -- Final output stage 290 291 subps xmm3,xmm1 ; xmm3=tmp6 292 movaps xmm5,xmm6 293 movaps xmm0,xmm7 294 addps xmm6,xmm1 ; xmm6=data0=(00 01 02 03) 295 addps xmm7,xmm3 ; xmm7=data1=(10 11 12 13) 296 subps xmm5,xmm1 ; xmm5=data7=(70 71 72 73) 297 subps xmm0,xmm3 ; xmm0=data6=(60 61 62 63) 298 subps xmm2,xmm3 ; xmm2=tmp5 299 300 movaps xmm1,xmm6 ; transpose coefficients(phase 1) 301 unpcklps xmm6,xmm7 ; xmm6=(00 10 01 11) 302 unpckhps xmm1,xmm7 ; xmm1=(02 12 03 13) 303 movaps xmm3,xmm0 ; transpose coefficients(phase 1) 304 unpcklps xmm0,xmm5 ; xmm0=(60 70 61 71) 305 unpckhps xmm3,xmm5 ; xmm3=(62 72 63 73) 306 307 movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2 308 movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3 309 310 movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71) 311 movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73) 312 313 addps xmm4,xmm2 ; xmm4=tmp4 314 movaps xmm0,xmm7 315 movaps xmm3,xmm5 316 addps xmm7,xmm2 ; xmm7=data2=(20 21 22 23) 317 addps xmm5,xmm4 ; xmm5=data4=(40 41 42 43) 318 subps xmm0,xmm2 ; xmm0=data5=(50 51 52 53) 319 subps xmm3,xmm4 ; xmm3=data3=(30 31 32 33) 320 321 movaps xmm2,xmm7 ; transpose coefficients(phase 1) 322 unpcklps xmm7,xmm3 ; xmm7=(20 30 21 31) 323 unpckhps xmm2,xmm3 ; xmm2=(22 32 23 33) 324 movaps xmm4,xmm5 ; transpose coefficients(phase 1) 325 unpcklps xmm5,xmm0 ; xmm5=(40 50 41 51) 326 unpckhps xmm4,xmm0 ; xmm4=(42 52 43 53) 327 328 movaps xmm3,xmm6 ; transpose coefficients(phase 2) 329 unpcklps2 xmm6,xmm7 ; xmm6=(00 10 20 30) 330 unpckhps2 xmm3,xmm7 ; xmm3=(01 11 21 31) 331 movaps xmm0,xmm1 ; transpose coefficients(phase 2) 332 unpcklps2 xmm1,xmm2 ; xmm1=(02 12 22 32) 333 unpckhps2 xmm0,xmm2 ; xmm0=(03 13 23 33) 334 335 movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71) 336 movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73) 337 338 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6 339 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3 340 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1 341 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0 342 343 movaps xmm6,xmm5 ; transpose coefficients(phase 2) 344 unpcklps2 xmm5,xmm7 ; xmm5=(40 50 60 70) 345 unpckhps2 xmm6,xmm7 ; xmm6=(41 51 61 71) 346 movaps xmm3,xmm4 ; transpose coefficients(phase 2) 347 unpcklps2 xmm4,xmm2 ; xmm4=(42 52 62 72) 348 unpckhps2 xmm3,xmm2 ; xmm3=(43 53 63 73) 349 350 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5 351 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6 352 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4 353 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3 354 355 .nextcolumn: 356 add esi, byte 4*SIZEOF_JCOEF ; coef_block 357 add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr 358 add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr 359 dec ecx ; ctr 360 jnz near .columnloop 361 362 ; -- Prefetch the next coefficient block 363 364 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32] 365 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32] 366 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32] 367 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32] 368 369 ; ---- Pass 2: process rows from work array, store into output array. 370 371 mov eax, [original_ebp] 372 lea esi, [workspace] ; FAST_FLOAT * wsptr 373 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 374 mov eax, JDIMENSION [output_col(eax)] 375 mov ecx, DCTSIZE/4 ; ctr 376 alignx 16,7 377 .rowloop: 378 379 ; -- Even part 380 381 movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)] 382 movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)] 383 movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)] 384 movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)] 385 386 movaps xmm4,xmm0 387 movaps xmm5,xmm1 388 subps xmm0,xmm2 ; xmm0=tmp11 389 subps xmm1,xmm3 390 addps xmm4,xmm2 ; xmm4=tmp10 391 addps xmm5,xmm3 ; xmm5=tmp13 392 393 mulps xmm1,[GOTOFF(ebx,PD_1_414)] 394 subps xmm1,xmm5 ; xmm1=tmp12 395 396 movaps xmm6,xmm4 397 movaps xmm7,xmm0 398 subps xmm4,xmm5 ; xmm4=tmp3 399 subps xmm0,xmm1 ; xmm0=tmp2 400 addps xmm6,xmm5 ; xmm6=tmp0 401 addps xmm7,xmm1 ; xmm7=tmp1 402 403 movaps XMMWORD [wk(1)], xmm4 ; tmp3 404 movaps XMMWORD [wk(0)], xmm0 ; tmp2 405 406 ; -- Odd part 407 408 movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)] 409 movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)] 410 movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)] 411 movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)] 412 413 movaps xmm4,xmm2 414 movaps xmm0,xmm5 415 addps xmm2,xmm1 ; xmm2=z11 416 addps xmm5,xmm3 ; xmm5=z13 417 subps xmm4,xmm1 ; xmm4=z12 418 subps xmm0,xmm3 ; xmm0=z10 419 420 movaps xmm1,xmm2 421 subps xmm2,xmm5 422 addps xmm1,xmm5 ; xmm1=tmp7 423 424 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11 425 426 movaps xmm3,xmm0 427 addps xmm0,xmm4 428 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5 429 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930) 430 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200) 431 addps xmm3,xmm0 ; xmm3=tmp12 432 subps xmm4,xmm0 ; xmm4=tmp10 433 434 ; -- Final output stage 435 436 subps xmm3,xmm1 ; xmm3=tmp6 437 movaps xmm5,xmm6 438 movaps xmm0,xmm7 439 addps xmm6,xmm1 ; xmm6=data0=(00 10 20 30) 440 addps xmm7,xmm3 ; xmm7=data1=(01 11 21 31) 441 subps xmm5,xmm1 ; xmm5=data7=(07 17 27 37) 442 subps xmm0,xmm3 ; xmm0=data6=(06 16 26 36) 443 subps xmm2,xmm3 ; xmm2=tmp5 444 445 movaps xmm1,[GOTOFF(ebx,PD_0_125)] ; xmm1=[PD_0_125] 446 447 mulps xmm6,xmm1 ; descale(1/8) 448 mulps xmm7,xmm1 ; descale(1/8) 449 mulps xmm5,xmm1 ; descale(1/8) 450 mulps xmm0,xmm1 ; descale(1/8) 451 452 movhlps xmm3,xmm6 453 movhlps xmm1,xmm7 454 cvtps2pi mm0,xmm6 ; round to int32, mm0=data0L=(00 10) 455 cvtps2pi mm1,xmm7 ; round to int32, mm1=data1L=(01 11) 456 cvtps2pi mm2,xmm3 ; round to int32, mm2=data0H=(20 30) 457 cvtps2pi mm3,xmm1 ; round to int32, mm3=data1H=(21 31) 458 packssdw mm0,mm2 ; mm0=data0=(00 10 20 30) 459 packssdw mm1,mm3 ; mm1=data1=(01 11 21 31) 460 461 movhlps xmm6,xmm5 462 movhlps xmm7,xmm0 463 cvtps2pi mm4,xmm5 ; round to int32, mm4=data7L=(07 17) 464 cvtps2pi mm5,xmm0 ; round to int32, mm5=data6L=(06 16) 465 cvtps2pi mm6,xmm6 ; round to int32, mm6=data7H=(27 37) 466 cvtps2pi mm7,xmm7 ; round to int32, mm7=data6H=(26 36) 467 packssdw mm4,mm6 ; mm4=data7=(07 17 27 37) 468 packssdw mm5,mm7 ; mm5=data6=(06 16 26 36) 469 470 packsswb mm0,mm5 ; mm0=(00 10 20 30 06 16 26 36) 471 packsswb mm1,mm4 ; mm1=(01 11 21 31 07 17 27 37) 472 473 movaps xmm3, XMMWORD [wk(0)] ; xmm3=tmp2 474 movaps xmm1, XMMWORD [wk(1)] ; xmm1=tmp3 475 476 movaps xmm6,[GOTOFF(ebx,PD_0_125)] ; xmm6=[PD_0_125] 477 478 addps xmm4,xmm2 ; xmm4=tmp4 479 movaps xmm5,xmm3 480 movaps xmm0,xmm1 481 addps xmm3,xmm2 ; xmm3=data2=(02 12 22 32) 482 addps xmm1,xmm4 ; xmm1=data4=(04 14 24 34) 483 subps xmm5,xmm2 ; xmm5=data5=(05 15 25 35) 484 subps xmm0,xmm4 ; xmm0=data3=(03 13 23 33) 485 486 mulps xmm3,xmm6 ; descale(1/8) 487 mulps xmm1,xmm6 ; descale(1/8) 488 mulps xmm5,xmm6 ; descale(1/8) 489 mulps xmm0,xmm6 ; descale(1/8) 490 491 movhlps xmm7,xmm3 492 movhlps xmm2,xmm1 493 cvtps2pi mm2,xmm3 ; round to int32, mm2=data2L=(02 12) 494 cvtps2pi mm3,xmm1 ; round to int32, mm3=data4L=(04 14) 495 cvtps2pi mm6,xmm7 ; round to int32, mm6=data2H=(22 32) 496 cvtps2pi mm7,xmm2 ; round to int32, mm7=data4H=(24 34) 497 packssdw mm2,mm6 ; mm2=data2=(02 12 22 32) 498 packssdw mm3,mm7 ; mm3=data4=(04 14 24 34) 499 500 movhlps xmm4,xmm5 501 movhlps xmm6,xmm0 502 cvtps2pi mm5,xmm5 ; round to int32, mm5=data5L=(05 15) 503 cvtps2pi mm4,xmm0 ; round to int32, mm4=data3L=(03 13) 504 cvtps2pi mm6,xmm4 ; round to int32, mm6=data5H=(25 35) 505 cvtps2pi mm7,xmm6 ; round to int32, mm7=data3H=(23 33) 506 packssdw mm5,mm6 ; mm5=data5=(05 15 25 35) 507 packssdw mm4,mm7 ; mm4=data3=(03 13 23 33) 508 509 movq mm6,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP] 510 511 packsswb mm2,mm3 ; mm2=(02 12 22 32 04 14 24 34) 512 packsswb mm4,mm5 ; mm4=(03 13 23 33 05 15 25 35) 513 514 paddb mm0,mm6 515 paddb mm1,mm6 516 paddb mm2,mm6 517 paddb mm4,mm6 518 519 movq mm7,mm0 ; transpose coefficients(phase 1) 520 punpcklbw mm0,mm1 ; mm0=(00 01 10 11 20 21 30 31) 521 punpckhbw mm7,mm1 ; mm7=(06 07 16 17 26 27 36 37) 522 movq mm3,mm2 ; transpose coefficients(phase 1) 523 punpcklbw mm2,mm4 ; mm2=(02 03 12 13 22 23 32 33) 524 punpckhbw mm3,mm4 ; mm3=(04 05 14 15 24 25 34 35) 525 526 movq mm5,mm0 ; transpose coefficients(phase 2) 527 punpcklwd mm0,mm2 ; mm0=(00 01 02 03 10 11 12 13) 528 punpckhwd mm5,mm2 ; mm5=(20 21 22 23 30 31 32 33) 529 movq mm6,mm3 ; transpose coefficients(phase 2) 530 punpcklwd mm3,mm7 ; mm3=(04 05 06 07 14 15 16 17) 531 punpckhwd mm6,mm7 ; mm6=(24 25 26 27 34 35 36 37) 532 533 movq mm1,mm0 ; transpose coefficients(phase 3) 534 punpckldq mm0,mm3 ; mm0=(00 01 02 03 04 05 06 07) 535 punpckhdq mm1,mm3 ; mm1=(10 11 12 13 14 15 16 17) 536 movq mm4,mm5 ; transpose coefficients(phase 3) 537 punpckldq mm5,mm6 ; mm5=(20 21 22 23 24 25 26 27) 538 punpckhdq mm4,mm6 ; mm4=(30 31 32 33 34 35 36 37) 539 540 pushpic ebx ; save GOT address 541 542 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 543 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 544 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0 545 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1 546 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 547 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 548 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5 549 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4 550 551 poppic ebx ; restore GOT address 552 553 add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr 554 add edi, byte 4*SIZEOF_JSAMPROW 555 dec ecx ; ctr 556 jnz near .rowloop 557 558 emms ; empty MMX state 559 560 pop edi 561 pop esi 562 ; pop edx ; need not be preserved 563 ; pop ecx ; need not be preserved 564 pop ebx 565 mov esp,ebp ; esp <- aligned ebp 566 pop esp ; esp <- original ebp 567 pop ebp 568 ret 569 570 ; For some reason, the OS X linker does not honor the request to align the 571 ; segment unless we do this. 572 align 16 573
