1 ; 2 ; jidctflt.asm - floating-point IDCT (SSE & MMX) 3 ; 4 ; Copyright 2009 Pierre Ossman <ossman (a] cendio.se> for Cendio AB 5 ; 6 ; Based on the x86 SIMD extension for IJG JPEG library 7 ; Copyright (C) 1999-2006, MIYASAKA Masaru. 8 ; For conditions of distribution and use, see copyright notice in jsimdext.inc 9 ; 10 ; This file should be assembled with NASM (Netwide Assembler), 11 ; can *not* be assembled with Microsoft's MASM or any compatible 12 ; assembler (including Borland's Turbo Assembler). 13 ; NASM is available from http://nasm.sourceforge.net/ or 14 ; http://sourceforge.net/project/showfiles.php?group_id=6208 15 ; 16 ; This file contains a floating-point implementation of the inverse DCT 17 ; (Discrete Cosine Transform). The following code is based directly on 18 ; the IJG's original jidctflt.c; see the jidctflt.c for more details. 19 ; 20 ; [TAB8] 21 22 %include "jsimdext.inc" 23 %include "jdct.inc" 24 25 ; -------------------------------------------------------------------------- 26 27 %macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5) 28 shufps %1,%2,0x44 29 %endmacro 30 31 %macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7) 32 shufps %1,%2,0xEE 33 %endmacro 34 35 ; -------------------------------------------------------------------------- 36 SECTION SEG_CONST 37 38 alignz 16 39 global EXTN(jconst_idct_float_sse) 40 41 EXTN(jconst_idct_float_sse): 42 43 PD_1_414 times 4 dd 1.414213562373095048801689 44 PD_1_847 times 4 dd 1.847759065022573512256366 45 PD_1_082 times 4 dd 1.082392200292393968799446 46 PD_M2_613 times 4 dd -2.613125929752753055713286 47 PD_0_125 times 4 dd 0.125 ; 1/8 48 PB_CENTERJSAMP times 8 db CENTERJSAMPLE 49 50 alignz 16 51 52 ; -------------------------------------------------------------------------- 53 SECTION SEG_TEXT 54 BITS 32 55 ; 56 ; Perform dequantization and inverse DCT on one block of coefficients. 57 ; 58 ; GLOBAL(void) 59 ; jsimd_idct_float_sse (void *dct_table, JCOEFPTR coef_block, 60 ; JSAMPARRAY output_buf, JDIMENSION output_col) 61 ; 62 63 %define dct_table(b) (b)+8 ; void *dct_table 64 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block 65 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf 66 %define output_col(b) (b)+20 ; JDIMENSION output_col 67 68 %define original_ebp ebp+0 69 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] 70 %define WK_NUM 2 71 %define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT 72 ; FAST_FLOAT workspace[DCTSIZE2] 73 74 align 16 75 global EXTN(jsimd_idct_float_sse) 76 77 EXTN(jsimd_idct_float_sse): 78 push ebp 79 mov eax,esp ; eax = original ebp 80 sub esp, byte 4 81 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 82 mov [esp],eax 83 mov ebp,esp ; ebp = aligned ebp 84 lea esp, [workspace] 85 push ebx 86 ; push ecx ; need not be preserved 87 ; push edx ; need not be preserved 88 push esi 89 push edi 90 91 get_GOT ebx ; get GOT address 92 93 ; ---- Pass 1: process columns from input, store into work array. 94 95 ; mov eax, [original_ebp] 96 mov edx, POINTER [dct_table(eax)] ; quantptr 97 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 98 lea edi, [workspace] ; FAST_FLOAT *wsptr 99 mov ecx, DCTSIZE/4 ; ctr 100 alignx 16,7 101 .columnloop: 102 %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE 103 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 104 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 105 jnz near .columnDCT 106 107 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 108 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 109 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 110 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 111 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 112 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 113 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 114 por mm1,mm0 115 packsswb mm1,mm1 116 movd eax,mm1 117 test eax,eax 118 jnz short .columnDCT 119 120 ; -- AC terms all zero 121 122 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 123 124 punpckhwd mm1,mm0 ; mm1=(** 02 ** 03) 125 punpcklwd mm0,mm0 ; mm0=(00 00 01 01) 126 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in0H=(02 03) 127 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01) 128 cvtpi2ps xmm3,mm1 ; xmm3=(02 03 ** **) 129 cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **) 130 movlhps xmm0,xmm3 ; xmm0=in0=(00 01 02 03) 131 132 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 133 134 movaps xmm1,xmm0 135 movaps xmm2,xmm0 136 movaps xmm3,xmm0 137 138 shufps xmm0,xmm0,0x00 ; xmm0=(00 00 00 00) 139 shufps xmm1,xmm1,0x55 ; xmm1=(01 01 01 01) 140 shufps xmm2,xmm2,0xAA ; xmm2=(02 02 02 02) 141 shufps xmm3,xmm3,0xFF ; xmm3=(03 03 03 03) 142 143 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0 144 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0 145 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1 146 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1 147 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2 148 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2 149 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3 150 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3 151 jmp near .nextcolumn 152 alignx 16,7 153 %endif 154 .columnDCT: 155 156 ; -- Even part 157 158 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 159 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 160 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 161 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 162 163 punpckhwd mm4,mm0 ; mm4=(** 02 ** 03) 164 punpcklwd mm0,mm0 ; mm0=(00 00 01 01) 165 punpckhwd mm5,mm1 ; mm5=(** 22 ** 23) 166 punpcklwd mm1,mm1 ; mm1=(20 20 21 21) 167 168 psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in0H=(02 03) 169 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01) 170 cvtpi2ps xmm4,mm4 ; xmm4=(02 03 ** **) 171 cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **) 172 psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in2H=(22 23) 173 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in2L=(20 21) 174 cvtpi2ps xmm5,mm5 ; xmm5=(22 23 ** **) 175 cvtpi2ps xmm1,mm1 ; xmm1=(20 21 ** **) 176 177 punpckhwd mm6,mm2 ; mm6=(** 42 ** 43) 178 punpcklwd mm2,mm2 ; mm2=(40 40 41 41) 179 punpckhwd mm7,mm3 ; mm7=(** 62 ** 63) 180 punpcklwd mm3,mm3 ; mm3=(60 60 61 61) 181 182 psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in4H=(42 43) 183 psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in4L=(40 41) 184 cvtpi2ps xmm6,mm6 ; xmm6=(42 43 ** **) 185 cvtpi2ps xmm2,mm2 ; xmm2=(40 41 ** **) 186 psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in6H=(62 63) 187 psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in6L=(60 61) 188 cvtpi2ps xmm7,mm7 ; xmm7=(62 63 ** **) 189 cvtpi2ps xmm3,mm3 ; xmm3=(60 61 ** **) 190 191 movlhps xmm0,xmm4 ; xmm0=in0=(00 01 02 03) 192 movlhps xmm1,xmm5 ; xmm1=in2=(20 21 22 23) 193 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 194 mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 195 196 movlhps xmm2,xmm6 ; xmm2=in4=(40 41 42 43) 197 movlhps xmm3,xmm7 ; xmm3=in6=(60 61 62 63) 198 mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 199 mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 200 201 movaps xmm4,xmm0 202 movaps xmm5,xmm1 203 subps xmm0,xmm2 ; xmm0=tmp11 204 subps xmm1,xmm3 205 addps xmm4,xmm2 ; xmm4=tmp10 206 addps xmm5,xmm3 ; xmm5=tmp13 207 208 mulps xmm1,[GOTOFF(ebx,PD_1_414)] 209 subps xmm1,xmm5 ; xmm1=tmp12 210 211 movaps xmm6,xmm4 212 movaps xmm7,xmm0 213 subps xmm4,xmm5 ; xmm4=tmp3 214 subps xmm0,xmm1 ; xmm0=tmp2 215 addps xmm6,xmm5 ; xmm6=tmp0 216 addps xmm7,xmm1 ; xmm7=tmp1 217 218 movaps XMMWORD [wk(1)], xmm4 ; tmp3 219 movaps XMMWORD [wk(0)], xmm0 ; tmp2 220 221 ; -- Odd part 222 223 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 224 movq mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 225 movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 226 movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 227 228 punpckhwd mm6,mm4 ; mm6=(** 12 ** 13) 229 punpcklwd mm4,mm4 ; mm4=(10 10 11 11) 230 punpckhwd mm2,mm0 ; mm2=(** 32 ** 33) 231 punpcklwd mm0,mm0 ; mm0=(30 30 31 31) 232 233 psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in1H=(12 13) 234 psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in1L=(10 11) 235 cvtpi2ps xmm4,mm6 ; xmm4=(12 13 ** **) 236 cvtpi2ps xmm2,mm4 ; xmm2=(10 11 ** **) 237 psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in3H=(32 33) 238 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in3L=(30 31) 239 cvtpi2ps xmm0,mm2 ; xmm0=(32 33 ** **) 240 cvtpi2ps xmm3,mm0 ; xmm3=(30 31 ** **) 241 242 punpckhwd mm7,mm5 ; mm7=(** 52 ** 53) 243 punpcklwd mm5,mm5 ; mm5=(50 50 51 51) 244 punpckhwd mm3,mm1 ; mm3=(** 72 ** 73) 245 punpcklwd mm1,mm1 ; mm1=(70 70 71 71) 246 247 movlhps xmm2,xmm4 ; xmm2=in1=(10 11 12 13) 248 movlhps xmm3,xmm0 ; xmm3=in3=(30 31 32 33) 249 250 psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in5H=(52 53) 251 psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in5L=(50 51) 252 cvtpi2ps xmm4,mm7 ; xmm4=(52 53 ** **) 253 cvtpi2ps xmm5,mm5 ; xmm5=(50 51 ** **) 254 psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in7H=(72 73) 255 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in7L=(70 71) 256 cvtpi2ps xmm0,mm3 ; xmm0=(72 73 ** **) 257 cvtpi2ps xmm1,mm1 ; xmm1=(70 71 ** **) 258 259 mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 260 mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 261 262 movlhps xmm5,xmm4 ; xmm5=in5=(50 51 52 53) 263 movlhps xmm1,xmm0 ; xmm1=in7=(70 71 72 73) 264 mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 265 mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)] 266 267 movaps xmm4,xmm2 268 movaps xmm0,xmm5 269 addps xmm2,xmm1 ; xmm2=z11 270 addps xmm5,xmm3 ; xmm5=z13 271 subps xmm4,xmm1 ; xmm4=z12 272 subps xmm0,xmm3 ; xmm0=z10 273 274 movaps xmm1,xmm2 275 subps xmm2,xmm5 276 addps xmm1,xmm5 ; xmm1=tmp7 277 278 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11 279 280 movaps xmm3,xmm0 281 addps xmm0,xmm4 282 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5 283 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930) 284 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200) 285 addps xmm3,xmm0 ; xmm3=tmp12 286 subps xmm4,xmm0 ; xmm4=tmp10 287 288 ; -- Final output stage 289 290 subps xmm3,xmm1 ; xmm3=tmp6 291 movaps xmm5,xmm6 292 movaps xmm0,xmm7 293 addps xmm6,xmm1 ; xmm6=data0=(00 01 02 03) 294 addps xmm7,xmm3 ; xmm7=data1=(10 11 12 13) 295 subps xmm5,xmm1 ; xmm5=data7=(70 71 72 73) 296 subps xmm0,xmm3 ; xmm0=data6=(60 61 62 63) 297 subps xmm2,xmm3 ; xmm2=tmp5 298 299 movaps xmm1,xmm6 ; transpose coefficients(phase 1) 300 unpcklps xmm6,xmm7 ; xmm6=(00 10 01 11) 301 unpckhps xmm1,xmm7 ; xmm1=(02 12 03 13) 302 movaps xmm3,xmm0 ; transpose coefficients(phase 1) 303 unpcklps xmm0,xmm5 ; xmm0=(60 70 61 71) 304 unpckhps xmm3,xmm5 ; xmm3=(62 72 63 73) 305 306 movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2 307 movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3 308 309 movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71) 310 movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73) 311 312 addps xmm4,xmm2 ; xmm4=tmp4 313 movaps xmm0,xmm7 314 movaps xmm3,xmm5 315 addps xmm7,xmm2 ; xmm7=data2=(20 21 22 23) 316 addps xmm5,xmm4 ; xmm5=data4=(40 41 42 43) 317 subps xmm0,xmm2 ; xmm0=data5=(50 51 52 53) 318 subps xmm3,xmm4 ; xmm3=data3=(30 31 32 33) 319 320 movaps xmm2,xmm7 ; transpose coefficients(phase 1) 321 unpcklps xmm7,xmm3 ; xmm7=(20 30 21 31) 322 unpckhps xmm2,xmm3 ; xmm2=(22 32 23 33) 323 movaps xmm4,xmm5 ; transpose coefficients(phase 1) 324 unpcklps xmm5,xmm0 ; xmm5=(40 50 41 51) 325 unpckhps xmm4,xmm0 ; xmm4=(42 52 43 53) 326 327 movaps xmm3,xmm6 ; transpose coefficients(phase 2) 328 unpcklps2 xmm6,xmm7 ; xmm6=(00 10 20 30) 329 unpckhps2 xmm3,xmm7 ; xmm3=(01 11 21 31) 330 movaps xmm0,xmm1 ; transpose coefficients(phase 2) 331 unpcklps2 xmm1,xmm2 ; xmm1=(02 12 22 32) 332 unpckhps2 xmm0,xmm2 ; xmm0=(03 13 23 33) 333 334 movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71) 335 movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73) 336 337 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6 338 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3 339 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1 340 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0 341 342 movaps xmm6,xmm5 ; transpose coefficients(phase 2) 343 unpcklps2 xmm5,xmm7 ; xmm5=(40 50 60 70) 344 unpckhps2 xmm6,xmm7 ; xmm6=(41 51 61 71) 345 movaps xmm3,xmm4 ; transpose coefficients(phase 2) 346 unpcklps2 xmm4,xmm2 ; xmm4=(42 52 62 72) 347 unpckhps2 xmm3,xmm2 ; xmm3=(43 53 63 73) 348 349 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5 350 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6 351 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4 352 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3 353 354 .nextcolumn: 355 add esi, byte 4*SIZEOF_JCOEF ; coef_block 356 add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr 357 add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr 358 dec ecx ; ctr 359 jnz near .columnloop 360 361 ; -- Prefetch the next coefficient block 362 363 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32] 364 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32] 365 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32] 366 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32] 367 368 ; ---- Pass 2: process rows from work array, store into output array. 369 370 mov eax, [original_ebp] 371 lea esi, [workspace] ; FAST_FLOAT *wsptr 372 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 373 mov eax, JDIMENSION [output_col(eax)] 374 mov ecx, DCTSIZE/4 ; ctr 375 alignx 16,7 376 .rowloop: 377 378 ; -- Even part 379 380 movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)] 381 movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)] 382 movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)] 383 movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)] 384 385 movaps xmm4,xmm0 386 movaps xmm5,xmm1 387 subps xmm0,xmm2 ; xmm0=tmp11 388 subps xmm1,xmm3 389 addps xmm4,xmm2 ; xmm4=tmp10 390 addps xmm5,xmm3 ; xmm5=tmp13 391 392 mulps xmm1,[GOTOFF(ebx,PD_1_414)] 393 subps xmm1,xmm5 ; xmm1=tmp12 394 395 movaps xmm6,xmm4 396 movaps xmm7,xmm0 397 subps xmm4,xmm5 ; xmm4=tmp3 398 subps xmm0,xmm1 ; xmm0=tmp2 399 addps xmm6,xmm5 ; xmm6=tmp0 400 addps xmm7,xmm1 ; xmm7=tmp1 401 402 movaps XMMWORD [wk(1)], xmm4 ; tmp3 403 movaps XMMWORD [wk(0)], xmm0 ; tmp2 404 405 ; -- Odd part 406 407 movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)] 408 movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)] 409 movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)] 410 movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)] 411 412 movaps xmm4,xmm2 413 movaps xmm0,xmm5 414 addps xmm2,xmm1 ; xmm2=z11 415 addps xmm5,xmm3 ; xmm5=z13 416 subps xmm4,xmm1 ; xmm4=z12 417 subps xmm0,xmm3 ; xmm0=z10 418 419 movaps xmm1,xmm2 420 subps xmm2,xmm5 421 addps xmm1,xmm5 ; xmm1=tmp7 422 423 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11 424 425 movaps xmm3,xmm0 426 addps xmm0,xmm4 427 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5 428 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930) 429 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200) 430 addps xmm3,xmm0 ; xmm3=tmp12 431 subps xmm4,xmm0 ; xmm4=tmp10 432 433 ; -- Final output stage 434 435 subps xmm3,xmm1 ; xmm3=tmp6 436 movaps xmm5,xmm6 437 movaps xmm0,xmm7 438 addps xmm6,xmm1 ; xmm6=data0=(00 10 20 30) 439 addps xmm7,xmm3 ; xmm7=data1=(01 11 21 31) 440 subps xmm5,xmm1 ; xmm5=data7=(07 17 27 37) 441 subps xmm0,xmm3 ; xmm0=data6=(06 16 26 36) 442 subps xmm2,xmm3 ; xmm2=tmp5 443 444 movaps xmm1,[GOTOFF(ebx,PD_0_125)] ; xmm1=[PD_0_125] 445 446 mulps xmm6,xmm1 ; descale(1/8) 447 mulps xmm7,xmm1 ; descale(1/8) 448 mulps xmm5,xmm1 ; descale(1/8) 449 mulps xmm0,xmm1 ; descale(1/8) 450 451 movhlps xmm3,xmm6 452 movhlps xmm1,xmm7 453 cvtps2pi mm0,xmm6 ; round to int32, mm0=data0L=(00 10) 454 cvtps2pi mm1,xmm7 ; round to int32, mm1=data1L=(01 11) 455 cvtps2pi mm2,xmm3 ; round to int32, mm2=data0H=(20 30) 456 cvtps2pi mm3,xmm1 ; round to int32, mm3=data1H=(21 31) 457 packssdw mm0,mm2 ; mm0=data0=(00 10 20 30) 458 packssdw mm1,mm3 ; mm1=data1=(01 11 21 31) 459 460 movhlps xmm6,xmm5 461 movhlps xmm7,xmm0 462 cvtps2pi mm4,xmm5 ; round to int32, mm4=data7L=(07 17) 463 cvtps2pi mm5,xmm0 ; round to int32, mm5=data6L=(06 16) 464 cvtps2pi mm6,xmm6 ; round to int32, mm6=data7H=(27 37) 465 cvtps2pi mm7,xmm7 ; round to int32, mm7=data6H=(26 36) 466 packssdw mm4,mm6 ; mm4=data7=(07 17 27 37) 467 packssdw mm5,mm7 ; mm5=data6=(06 16 26 36) 468 469 packsswb mm0,mm5 ; mm0=(00 10 20 30 06 16 26 36) 470 packsswb mm1,mm4 ; mm1=(01 11 21 31 07 17 27 37) 471 472 movaps xmm3, XMMWORD [wk(0)] ; xmm3=tmp2 473 movaps xmm1, XMMWORD [wk(1)] ; xmm1=tmp3 474 475 movaps xmm6,[GOTOFF(ebx,PD_0_125)] ; xmm6=[PD_0_125] 476 477 addps xmm4,xmm2 ; xmm4=tmp4 478 movaps xmm5,xmm3 479 movaps xmm0,xmm1 480 addps xmm3,xmm2 ; xmm3=data2=(02 12 22 32) 481 addps xmm1,xmm4 ; xmm1=data4=(04 14 24 34) 482 subps xmm5,xmm2 ; xmm5=data5=(05 15 25 35) 483 subps xmm0,xmm4 ; xmm0=data3=(03 13 23 33) 484 485 mulps xmm3,xmm6 ; descale(1/8) 486 mulps xmm1,xmm6 ; descale(1/8) 487 mulps xmm5,xmm6 ; descale(1/8) 488 mulps xmm0,xmm6 ; descale(1/8) 489 490 movhlps xmm7,xmm3 491 movhlps xmm2,xmm1 492 cvtps2pi mm2,xmm3 ; round to int32, mm2=data2L=(02 12) 493 cvtps2pi mm3,xmm1 ; round to int32, mm3=data4L=(04 14) 494 cvtps2pi mm6,xmm7 ; round to int32, mm6=data2H=(22 32) 495 cvtps2pi mm7,xmm2 ; round to int32, mm7=data4H=(24 34) 496 packssdw mm2,mm6 ; mm2=data2=(02 12 22 32) 497 packssdw mm3,mm7 ; mm3=data4=(04 14 24 34) 498 499 movhlps xmm4,xmm5 500 movhlps xmm6,xmm0 501 cvtps2pi mm5,xmm5 ; round to int32, mm5=data5L=(05 15) 502 cvtps2pi mm4,xmm0 ; round to int32, mm4=data3L=(03 13) 503 cvtps2pi mm6,xmm4 ; round to int32, mm6=data5H=(25 35) 504 cvtps2pi mm7,xmm6 ; round to int32, mm7=data3H=(23 33) 505 packssdw mm5,mm6 ; mm5=data5=(05 15 25 35) 506 packssdw mm4,mm7 ; mm4=data3=(03 13 23 33) 507 508 movq mm6,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP] 509 510 packsswb mm2,mm3 ; mm2=(02 12 22 32 04 14 24 34) 511 packsswb mm4,mm5 ; mm4=(03 13 23 33 05 15 25 35) 512 513 paddb mm0,mm6 514 paddb mm1,mm6 515 paddb mm2,mm6 516 paddb mm4,mm6 517 518 movq mm7,mm0 ; transpose coefficients(phase 1) 519 punpcklbw mm0,mm1 ; mm0=(00 01 10 11 20 21 30 31) 520 punpckhbw mm7,mm1 ; mm7=(06 07 16 17 26 27 36 37) 521 movq mm3,mm2 ; transpose coefficients(phase 1) 522 punpcklbw mm2,mm4 ; mm2=(02 03 12 13 22 23 32 33) 523 punpckhbw mm3,mm4 ; mm3=(04 05 14 15 24 25 34 35) 524 525 movq mm5,mm0 ; transpose coefficients(phase 2) 526 punpcklwd mm0,mm2 ; mm0=(00 01 02 03 10 11 12 13) 527 punpckhwd mm5,mm2 ; mm5=(20 21 22 23 30 31 32 33) 528 movq mm6,mm3 ; transpose coefficients(phase 2) 529 punpcklwd mm3,mm7 ; mm3=(04 05 06 07 14 15 16 17) 530 punpckhwd mm6,mm7 ; mm6=(24 25 26 27 34 35 36 37) 531 532 movq mm1,mm0 ; transpose coefficients(phase 3) 533 punpckldq mm0,mm3 ; mm0=(00 01 02 03 04 05 06 07) 534 punpckhdq mm1,mm3 ; mm1=(10 11 12 13 14 15 16 17) 535 movq mm4,mm5 ; transpose coefficients(phase 3) 536 punpckldq mm5,mm6 ; mm5=(20 21 22 23 24 25 26 27) 537 punpckhdq mm4,mm6 ; mm4=(30 31 32 33 34 35 36 37) 538 539 pushpic ebx ; save GOT address 540 541 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 542 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 543 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0 544 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1 545 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 546 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 547 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5 548 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4 549 550 poppic ebx ; restore GOT address 551 552 add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr 553 add edi, byte 4*SIZEOF_JSAMPROW 554 dec ecx ; ctr 555 jnz near .rowloop 556 557 emms ; empty MMX state 558 559 pop edi 560 pop esi 561 ; pop edx ; need not be preserved 562 ; pop ecx ; need not be preserved 563 pop ebx 564 mov esp,ebp ; esp <- aligned ebp 565 pop esp ; esp <- original ebp 566 pop ebp 567 ret 568 569 ; For some reason, the OS X linker does not honor the request to align the 570 ; segment unless we do this. 571 align 16 572
