1 ; 2 ; jidctred.asm - reduced-size IDCT (SSE2) 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 inverse-DCT routines that produce reduced-size 17 ; output: either 4x4 or 2x2 pixels from an 8x8 DCT block. 18 ; The following code is based directly on the IJG's original jidctred.c; 19 ; see the jidctred.c for more details. 20 ; 21 ; [TAB8] 22 23 %include "jsimdext.inc" 24 %include "jdct.inc" 25 26 ; -------------------------------------------------------------------------- 27 28 %define CONST_BITS 13 29 %define PASS1_BITS 2 30 31 %define DESCALE_P1_4 (CONST_BITS-PASS1_BITS+1) 32 %define DESCALE_P2_4 (CONST_BITS+PASS1_BITS+3+1) 33 %define DESCALE_P1_2 (CONST_BITS-PASS1_BITS+2) 34 %define DESCALE_P2_2 (CONST_BITS+PASS1_BITS+3+2) 35 36 %if CONST_BITS == 13 37 F_0_211 equ 1730 ; FIX(0.211164243) 38 F_0_509 equ 4176 ; FIX(0.509795579) 39 F_0_601 equ 4926 ; FIX(0.601344887) 40 F_0_720 equ 5906 ; FIX(0.720959822) 41 F_0_765 equ 6270 ; FIX(0.765366865) 42 F_0_850 equ 6967 ; FIX(0.850430095) 43 F_0_899 equ 7373 ; FIX(0.899976223) 44 F_1_061 equ 8697 ; FIX(1.061594337) 45 F_1_272 equ 10426 ; FIX(1.272758580) 46 F_1_451 equ 11893 ; FIX(1.451774981) 47 F_1_847 equ 15137 ; FIX(1.847759065) 48 F_2_172 equ 17799 ; FIX(2.172734803) 49 F_2_562 equ 20995 ; FIX(2.562915447) 50 F_3_624 equ 29692 ; FIX(3.624509785) 51 %else 52 ; NASM cannot do compile-time arithmetic on floating-point constants. 53 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) 54 F_0_211 equ DESCALE( 226735879,30-CONST_BITS) ; FIX(0.211164243) 55 F_0_509 equ DESCALE( 547388834,30-CONST_BITS) ; FIX(0.509795579) 56 F_0_601 equ DESCALE( 645689155,30-CONST_BITS) ; FIX(0.601344887) 57 F_0_720 equ DESCALE( 774124714,30-CONST_BITS) ; FIX(0.720959822) 58 F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) 59 F_0_850 equ DESCALE( 913142361,30-CONST_BITS) ; FIX(0.850430095) 60 F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) 61 F_1_061 equ DESCALE(1139878239,30-CONST_BITS) ; FIX(1.061594337) 62 F_1_272 equ DESCALE(1366614119,30-CONST_BITS) ; FIX(1.272758580) 63 F_1_451 equ DESCALE(1558831516,30-CONST_BITS) ; FIX(1.451774981) 64 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) 65 F_2_172 equ DESCALE(2332956230,30-CONST_BITS) ; FIX(2.172734803) 66 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) 67 F_3_624 equ DESCALE(3891787747,30-CONST_BITS) ; FIX(3.624509785) 68 %endif 69 70 ; -------------------------------------------------------------------------- 71 SECTION SEG_CONST 72 73 alignz 16 74 global EXTN(jconst_idct_red_sse2) 75 76 EXTN(jconst_idct_red_sse2): 77 78 PW_F184_MF076 times 4 dw F_1_847,-F_0_765 79 PW_F256_F089 times 4 dw F_2_562, F_0_899 80 PW_F106_MF217 times 4 dw F_1_061,-F_2_172 81 PW_MF060_MF050 times 4 dw -F_0_601,-F_0_509 82 PW_F145_MF021 times 4 dw F_1_451,-F_0_211 83 PW_F362_MF127 times 4 dw F_3_624,-F_1_272 84 PW_F085_MF072 times 4 dw F_0_850,-F_0_720 85 PD_DESCALE_P1_4 times 4 dd 1 << (DESCALE_P1_4-1) 86 PD_DESCALE_P2_4 times 4 dd 1 << (DESCALE_P2_4-1) 87 PD_DESCALE_P1_2 times 4 dd 1 << (DESCALE_P1_2-1) 88 PD_DESCALE_P2_2 times 4 dd 1 << (DESCALE_P2_2-1) 89 PB_CENTERJSAMP times 16 db CENTERJSAMPLE 90 91 alignz 16 92 93 ; -------------------------------------------------------------------------- 94 SECTION SEG_TEXT 95 BITS 32 96 ; 97 ; Perform dequantization and inverse DCT on one block of coefficients, 98 ; producing a reduced-size 4x4 output block. 99 ; 100 ; GLOBAL(void) 101 ; jsimd_idct_4x4_sse2 (void *dct_table, JCOEFPTR coef_block, 102 ; JSAMPARRAY output_buf, JDIMENSION output_col) 103 ; 104 105 %define dct_table(b) (b)+8 ; void *dct_table 106 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block 107 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf 108 %define output_col(b) (b)+20 ; JDIMENSION output_col 109 110 %define original_ebp ebp+0 111 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] 112 %define WK_NUM 2 113 114 align 16 115 global EXTN(jsimd_idct_4x4_sse2) 116 117 EXTN(jsimd_idct_4x4_sse2): 118 push ebp 119 mov eax,esp ; eax = original ebp 120 sub esp, byte 4 121 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 122 mov [esp],eax 123 mov ebp,esp ; ebp = aligned ebp 124 lea esp, [wk(0)] 125 pushpic ebx 126 ; push ecx ; unused 127 ; push edx ; need not be preserved 128 push esi 129 push edi 130 131 get_GOT ebx ; get GOT address 132 133 ; ---- Pass 1: process columns from input. 134 135 ; mov eax, [original_ebp] 136 mov edx, POINTER [dct_table(eax)] ; quantptr 137 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 138 139 %ifndef NO_ZERO_COLUMN_TEST_4X4_SSE2 140 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 141 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 142 jnz short .columnDCT 143 144 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] 145 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)] 146 por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] 147 por xmm1, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] 148 por xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] 149 por xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] 150 por xmm0,xmm1 151 packsswb xmm0,xmm0 152 packsswb xmm0,xmm0 153 movd eax,xmm0 154 test eax,eax 155 jnz short .columnDCT 156 157 ; -- AC terms all zero 158 159 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] 160 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 161 162 psllw xmm0,PASS1_BITS 163 164 movdqa xmm3,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07) 165 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03) 166 punpckhwd xmm3,xmm3 ; xmm3=(04 04 05 05 06 06 07 07) 167 168 pshufd xmm1,xmm0,0x50 ; xmm1=[col0 col1]=(00 00 00 00 01 01 01 01) 169 pshufd xmm0,xmm0,0xFA ; xmm0=[col2 col3]=(02 02 02 02 03 03 03 03) 170 pshufd xmm6,xmm3,0x50 ; xmm6=[col4 col5]=(04 04 04 04 05 05 05 05) 171 pshufd xmm3,xmm3,0xFA ; xmm3=[col6 col7]=(06 06 06 06 07 07 07 07) 172 173 jmp near .column_end 174 alignx 16,7 175 %endif 176 .columnDCT: 177 178 ; -- Odd part 179 180 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] 181 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] 182 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 183 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 184 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] 185 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] 186 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 187 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 188 189 movdqa xmm4,xmm0 190 movdqa xmm5,xmm0 191 punpcklwd xmm4,xmm1 192 punpckhwd xmm5,xmm1 193 movdqa xmm0,xmm4 194 movdqa xmm1,xmm5 195 pmaddwd xmm4,[GOTOFF(ebx,PW_F256_F089)] ; xmm4=(tmp2L) 196 pmaddwd xmm5,[GOTOFF(ebx,PW_F256_F089)] ; xmm5=(tmp2H) 197 pmaddwd xmm0,[GOTOFF(ebx,PW_F106_MF217)] ; xmm0=(tmp0L) 198 pmaddwd xmm1,[GOTOFF(ebx,PW_F106_MF217)] ; xmm1=(tmp0H) 199 200 movdqa xmm6,xmm2 201 movdqa xmm7,xmm2 202 punpcklwd xmm6,xmm3 203 punpckhwd xmm7,xmm3 204 movdqa xmm2,xmm6 205 movdqa xmm3,xmm7 206 pmaddwd xmm6,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2L) 207 pmaddwd xmm7,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm7=(tmp2H) 208 pmaddwd xmm2,[GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0L) 209 pmaddwd xmm3,[GOTOFF(ebx,PW_F145_MF021)] ; xmm3=(tmp0H) 210 211 paddd xmm6,xmm4 ; xmm6=tmp2L 212 paddd xmm7,xmm5 ; xmm7=tmp2H 213 paddd xmm2,xmm0 ; xmm2=tmp0L 214 paddd xmm3,xmm1 ; xmm3=tmp0H 215 216 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp0L 217 movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=tmp0H 218 219 ; -- Even part 220 221 movdqa xmm4, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] 222 movdqa xmm5, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)] 223 movdqa xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] 224 pmullw xmm4, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 225 pmullw xmm5, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 226 pmullw xmm0, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 227 228 pxor xmm1,xmm1 229 pxor xmm2,xmm2 230 punpcklwd xmm1,xmm4 ; xmm1=tmp0L 231 punpckhwd xmm2,xmm4 ; xmm2=tmp0H 232 psrad xmm1,(16-CONST_BITS-1) ; psrad xmm1,16 & pslld xmm1,CONST_BITS+1 233 psrad xmm2,(16-CONST_BITS-1) ; psrad xmm2,16 & pslld xmm2,CONST_BITS+1 234 235 movdqa xmm3,xmm5 ; xmm5=in2=z2 236 punpcklwd xmm5,xmm0 ; xmm0=in6=z3 237 punpckhwd xmm3,xmm0 238 pmaddwd xmm5,[GOTOFF(ebx,PW_F184_MF076)] ; xmm5=tmp2L 239 pmaddwd xmm3,[GOTOFF(ebx,PW_F184_MF076)] ; xmm3=tmp2H 240 241 movdqa xmm4,xmm1 242 movdqa xmm0,xmm2 243 paddd xmm1,xmm5 ; xmm1=tmp10L 244 paddd xmm2,xmm3 ; xmm2=tmp10H 245 psubd xmm4,xmm5 ; xmm4=tmp12L 246 psubd xmm0,xmm3 ; xmm0=tmp12H 247 248 ; -- Final output stage 249 250 movdqa xmm5,xmm1 251 movdqa xmm3,xmm2 252 paddd xmm1,xmm6 ; xmm1=data0L 253 paddd xmm2,xmm7 ; xmm2=data0H 254 psubd xmm5,xmm6 ; xmm5=data3L 255 psubd xmm3,xmm7 ; xmm3=data3H 256 257 movdqa xmm6,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm6=[PD_DESCALE_P1_4] 258 259 paddd xmm1,xmm6 260 paddd xmm2,xmm6 261 psrad xmm1,DESCALE_P1_4 262 psrad xmm2,DESCALE_P1_4 263 paddd xmm5,xmm6 264 paddd xmm3,xmm6 265 psrad xmm5,DESCALE_P1_4 266 psrad xmm3,DESCALE_P1_4 267 268 packssdw xmm1,xmm2 ; xmm1=data0=(00 01 02 03 04 05 06 07) 269 packssdw xmm5,xmm3 ; xmm5=data3=(30 31 32 33 34 35 36 37) 270 271 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp0L 272 movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp0H 273 274 movdqa xmm2,xmm4 275 movdqa xmm3,xmm0 276 paddd xmm4,xmm7 ; xmm4=data1L 277 paddd xmm0,xmm6 ; xmm0=data1H 278 psubd xmm2,xmm7 ; xmm2=data2L 279 psubd xmm3,xmm6 ; xmm3=data2H 280 281 movdqa xmm7,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm7=[PD_DESCALE_P1_4] 282 283 paddd xmm4,xmm7 284 paddd xmm0,xmm7 285 psrad xmm4,DESCALE_P1_4 286 psrad xmm0,DESCALE_P1_4 287 paddd xmm2,xmm7 288 paddd xmm3,xmm7 289 psrad xmm2,DESCALE_P1_4 290 psrad xmm3,DESCALE_P1_4 291 292 packssdw xmm4,xmm0 ; xmm4=data1=(10 11 12 13 14 15 16 17) 293 packssdw xmm2,xmm3 ; xmm2=data2=(20 21 22 23 24 25 26 27) 294 295 movdqa xmm6,xmm1 ; transpose coefficients(phase 1) 296 punpcklwd xmm1,xmm4 ; xmm1=(00 10 01 11 02 12 03 13) 297 punpckhwd xmm6,xmm4 ; xmm6=(04 14 05 15 06 16 07 17) 298 movdqa xmm7,xmm2 ; transpose coefficients(phase 1) 299 punpcklwd xmm2,xmm5 ; xmm2=(20 30 21 31 22 32 23 33) 300 punpckhwd xmm7,xmm5 ; xmm7=(24 34 25 35 26 36 27 37) 301 302 movdqa xmm0,xmm1 ; transpose coefficients(phase 2) 303 punpckldq xmm1,xmm2 ; xmm1=[col0 col1]=(00 10 20 30 01 11 21 31) 304 punpckhdq xmm0,xmm2 ; xmm0=[col2 col3]=(02 12 22 32 03 13 23 33) 305 movdqa xmm3,xmm6 ; transpose coefficients(phase 2) 306 punpckldq xmm6,xmm7 ; xmm6=[col4 col5]=(04 14 24 34 05 15 25 35) 307 punpckhdq xmm3,xmm7 ; xmm3=[col6 col7]=(06 16 26 36 07 17 27 37) 308 .column_end: 309 310 ; -- Prefetch the next coefficient block 311 312 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 313 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 314 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 315 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 316 317 ; ---- Pass 2: process rows, store into output array. 318 319 mov eax, [original_ebp] 320 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 321 mov eax, JDIMENSION [output_col(eax)] 322 323 ; -- Even part 324 325 pxor xmm4,xmm4 326 punpcklwd xmm4,xmm1 ; xmm4=tmp0 327 psrad xmm4,(16-CONST_BITS-1) ; psrad xmm4,16 & pslld xmm4,CONST_BITS+1 328 329 ; -- Odd part 330 331 punpckhwd xmm1,xmm0 332 punpckhwd xmm6,xmm3 333 movdqa xmm5,xmm1 334 movdqa xmm2,xmm6 335 pmaddwd xmm1,[GOTOFF(ebx,PW_F256_F089)] ; xmm1=(tmp2) 336 pmaddwd xmm6,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2) 337 pmaddwd xmm5,[GOTOFF(ebx,PW_F106_MF217)] ; xmm5=(tmp0) 338 pmaddwd xmm2,[GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0) 339 340 paddd xmm6,xmm1 ; xmm6=tmp2 341 paddd xmm2,xmm5 ; xmm2=tmp0 342 343 ; -- Even part 344 345 punpcklwd xmm0,xmm3 346 pmaddwd xmm0,[GOTOFF(ebx,PW_F184_MF076)] ; xmm0=tmp2 347 348 movdqa xmm7,xmm4 349 paddd xmm4,xmm0 ; xmm4=tmp10 350 psubd xmm7,xmm0 ; xmm7=tmp12 351 352 ; -- Final output stage 353 354 movdqa xmm1,[GOTOFF(ebx,PD_DESCALE_P2_4)] ; xmm1=[PD_DESCALE_P2_4] 355 356 movdqa xmm5,xmm4 357 movdqa xmm3,xmm7 358 paddd xmm4,xmm6 ; xmm4=data0=(00 10 20 30) 359 paddd xmm7,xmm2 ; xmm7=data1=(01 11 21 31) 360 psubd xmm5,xmm6 ; xmm5=data3=(03 13 23 33) 361 psubd xmm3,xmm2 ; xmm3=data2=(02 12 22 32) 362 363 paddd xmm4,xmm1 364 paddd xmm7,xmm1 365 psrad xmm4,DESCALE_P2_4 366 psrad xmm7,DESCALE_P2_4 367 paddd xmm5,xmm1 368 paddd xmm3,xmm1 369 psrad xmm5,DESCALE_P2_4 370 psrad xmm3,DESCALE_P2_4 371 372 packssdw xmm4,xmm3 ; xmm4=(00 10 20 30 02 12 22 32) 373 packssdw xmm7,xmm5 ; xmm7=(01 11 21 31 03 13 23 33) 374 375 movdqa xmm0,xmm4 ; transpose coefficients(phase 1) 376 punpcklwd xmm4,xmm7 ; xmm4=(00 01 10 11 20 21 30 31) 377 punpckhwd xmm0,xmm7 ; xmm0=(02 03 12 13 22 23 32 33) 378 379 movdqa xmm6,xmm4 ; transpose coefficients(phase 2) 380 punpckldq xmm4,xmm0 ; xmm4=(00 01 02 03 10 11 12 13) 381 punpckhdq xmm6,xmm0 ; xmm6=(20 21 22 23 30 31 32 33) 382 383 packsswb xmm4,xmm6 ; xmm4=(00 01 02 03 10 11 12 13 20 ..) 384 paddb xmm4,[GOTOFF(ebx,PB_CENTERJSAMP)] 385 386 pshufd xmm2,xmm4,0x39 ; xmm2=(10 11 12 13 20 21 22 23 30 ..) 387 pshufd xmm1,xmm4,0x4E ; xmm1=(20 21 22 23 30 31 32 33 00 ..) 388 pshufd xmm3,xmm4,0x93 ; xmm3=(30 31 32 33 00 01 02 03 10 ..) 389 390 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 391 mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 392 movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm4 393 movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm2 394 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 395 mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 396 movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm1 397 movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm3 398 399 pop edi 400 pop esi 401 ; pop edx ; need not be preserved 402 ; pop ecx ; unused 403 poppic ebx 404 mov esp,ebp ; esp <- aligned ebp 405 pop esp ; esp <- original ebp 406 pop ebp 407 ret 408 409 410 ; -------------------------------------------------------------------------- 411 ; 412 ; Perform dequantization and inverse DCT on one block of coefficients, 413 ; producing a reduced-size 2x2 output block. 414 ; 415 ; GLOBAL(void) 416 ; jsimd_idct_2x2_sse2 (void *dct_table, JCOEFPTR coef_block, 417 ; JSAMPARRAY output_buf, JDIMENSION output_col) 418 ; 419 420 %define dct_table(b) (b)+8 ; void *dct_table 421 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block 422 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf 423 %define output_col(b) (b)+20 ; JDIMENSION output_col 424 425 align 16 426 global EXTN(jsimd_idct_2x2_sse2) 427 428 EXTN(jsimd_idct_2x2_sse2): 429 push ebp 430 mov ebp,esp 431 push ebx 432 ; push ecx ; need not be preserved 433 ; push edx ; need not be preserved 434 push esi 435 push edi 436 437 get_GOT ebx ; get GOT address 438 439 ; ---- Pass 1: process columns from input. 440 441 mov edx, POINTER [dct_table(ebp)] ; quantptr 442 mov esi, JCOEFPTR [coef_block(ebp)] ; inptr 443 444 ; | input: | result: | 445 ; | 00 01 ** 03 ** 05 ** 07 | | 446 ; | 10 11 ** 13 ** 15 ** 17 | | 447 ; | ** ** ** ** ** ** ** ** | | 448 ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 | 449 ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 | 450 ; | 50 51 ** 53 ** 55 ** 57 | | 451 ; | ** ** ** ** ** ** ** ** | | 452 ; | 70 71 ** 73 ** 75 ** 77 | | 453 454 ; -- Odd part 455 456 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] 457 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] 458 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 459 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 460 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] 461 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] 462 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 463 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 464 465 ; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37) 466 ; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77) 467 468 pcmpeqd xmm7,xmm7 469 pslld xmm7,WORD_BIT ; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..} 470 471 movdqa xmm4,xmm0 ; xmm4=(10 11 ** 13 ** 15 ** 17) 472 movdqa xmm5,xmm2 ; xmm5=(50 51 ** 53 ** 55 ** 57) 473 punpcklwd xmm4,xmm1 ; xmm4=(10 30 11 31 ** ** 13 33) 474 punpcklwd xmm5,xmm3 ; xmm5=(50 70 51 71 ** ** 53 73) 475 pmaddwd xmm4,[GOTOFF(ebx,PW_F362_MF127)] 476 pmaddwd xmm5,[GOTOFF(ebx,PW_F085_MF072)] 477 478 psrld xmm0,WORD_BIT ; xmm0=(11 -- 13 -- 15 -- 17 --) 479 pand xmm1,xmm7 ; xmm1=(-- 31 -- 33 -- 35 -- 37) 480 psrld xmm2,WORD_BIT ; xmm2=(51 -- 53 -- 55 -- 57 --) 481 pand xmm3,xmm7 ; xmm3=(-- 71 -- 73 -- 75 -- 77) 482 por xmm0,xmm1 ; xmm0=(11 31 13 33 15 35 17 37) 483 por xmm2,xmm3 ; xmm2=(51 71 53 73 55 75 57 77) 484 pmaddwd xmm0,[GOTOFF(ebx,PW_F362_MF127)] 485 pmaddwd xmm2,[GOTOFF(ebx,PW_F085_MF072)] 486 487 paddd xmm4,xmm5 ; xmm4=tmp0[col0 col1 **** col3] 488 paddd xmm0,xmm2 ; xmm0=tmp0[col1 col3 col5 col7] 489 490 ; -- Even part 491 492 movdqa xmm6, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] 493 pmullw xmm6, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 494 495 ; xmm6=(00 01 ** 03 ** 05 ** 07) 496 497 movdqa xmm1,xmm6 ; xmm1=(00 01 ** 03 ** 05 ** 07) 498 pslld xmm6,WORD_BIT ; xmm6=(-- 00 -- ** -- ** -- **) 499 pand xmm1,xmm7 ; xmm1=(-- 01 -- 03 -- 05 -- 07) 500 psrad xmm6,(WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****] 501 psrad xmm1,(WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7] 502 503 ; -- Final output stage 504 505 movdqa xmm3,xmm6 506 movdqa xmm5,xmm1 507 paddd xmm6,xmm4 ; xmm6=data0[col0 **** **** ****]=(A0 ** ** **) 508 paddd xmm1,xmm0 ; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7) 509 psubd xmm3,xmm4 ; xmm3=data1[col0 **** **** ****]=(B0 ** ** **) 510 psubd xmm5,xmm0 ; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7) 511 512 movdqa xmm2,[GOTOFF(ebx,PD_DESCALE_P1_2)] ; xmm2=[PD_DESCALE_P1_2] 513 514 punpckldq xmm6,xmm3 ; xmm6=(A0 B0 ** **) 515 516 movdqa xmm7,xmm1 517 punpcklqdq xmm1,xmm5 ; xmm1=(A1 A3 B1 B3) 518 punpckhqdq xmm7,xmm5 ; xmm7=(A5 A7 B5 B7) 519 520 paddd xmm6,xmm2 521 psrad xmm6,DESCALE_P1_2 522 523 paddd xmm1,xmm2 524 paddd xmm7,xmm2 525 psrad xmm1,DESCALE_P1_2 526 psrad xmm7,DESCALE_P1_2 527 528 ; -- Prefetch the next coefficient block 529 530 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 531 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 532 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 533 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 534 535 ; ---- Pass 2: process rows, store into output array. 536 537 mov edi, JSAMPARRAY [output_buf(ebp)] ; (JSAMPROW *) 538 mov eax, JDIMENSION [output_col(ebp)] 539 540 ; | input:| result:| 541 ; | A0 B0 | | 542 ; | A1 B1 | C0 C1 | 543 ; | A3 B3 | D0 D1 | 544 ; | A5 B5 | | 545 ; | A7 B7 | | 546 547 ; -- Odd part 548 549 packssdw xmm1,xmm1 ; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3) 550 packssdw xmm7,xmm7 ; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7) 551 pmaddwd xmm1,[GOTOFF(ebx,PW_F362_MF127)] 552 pmaddwd xmm7,[GOTOFF(ebx,PW_F085_MF072)] 553 554 paddd xmm1,xmm7 ; xmm1=tmp0[row0 row1 row0 row1] 555 556 ; -- Even part 557 558 pslld xmm6,(CONST_BITS+2) ; xmm6=tmp10[row0 row1 **** ****] 559 560 ; -- Final output stage 561 562 movdqa xmm4,xmm6 563 paddd xmm6,xmm1 ; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **) 564 psubd xmm4,xmm1 ; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **) 565 566 punpckldq xmm6,xmm4 ; xmm6=(C0 D0 C1 D1) 567 568 paddd xmm6,[GOTOFF(ebx,PD_DESCALE_P2_2)] 569 psrad xmm6,DESCALE_P2_2 570 571 packssdw xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1) 572 packsswb xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..) 573 paddb xmm6,[GOTOFF(ebx,PB_CENTERJSAMP)] 574 575 pextrw ebx,xmm6,0x00 ; ebx=(C0 D0 -- --) 576 pextrw ecx,xmm6,0x01 ; ecx=(C1 D1 -- --) 577 578 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 579 mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 580 mov WORD [edx+eax*SIZEOF_JSAMPLE], bx 581 mov WORD [esi+eax*SIZEOF_JSAMPLE], cx 582 583 pop edi 584 pop esi 585 ; pop edx ; need not be preserved 586 ; pop ecx ; need not be preserved 587 pop ebx 588 pop ebp 589 ret 590 591 ; For some reason, the OS X linker does not honor the request to align the 592 ; segment unless we do this. 593 align 16 594
