1 ; 2 ; jiss2red.asm - reduced-size IDCT (SSE2) 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 inverse-DCT routines that produce reduced-size 18 ; output: either 4x4 or 2x2 pixels from an 8x8 DCT block. 19 ; The following code is based directly on the IJG's original jidctred.c; 20 ; see the jidctred.c for more details. 21 ; 22 ; [TAB8] 23 24 %include "jsimdext.inc" 25 %include "jdct.inc" 26 27 ; -------------------------------------------------------------------------- 28 29 %define CONST_BITS 13 30 %define PASS1_BITS 2 31 32 %define DESCALE_P1_4 (CONST_BITS-PASS1_BITS+1) 33 %define DESCALE_P2_4 (CONST_BITS+PASS1_BITS+3+1) 34 %define DESCALE_P1_2 (CONST_BITS-PASS1_BITS+2) 35 %define DESCALE_P2_2 (CONST_BITS+PASS1_BITS+3+2) 36 37 %if CONST_BITS == 13 38 F_0_211 equ 1730 ; FIX(0.211164243) 39 F_0_509 equ 4176 ; FIX(0.509795579) 40 F_0_601 equ 4926 ; FIX(0.601344887) 41 F_0_720 equ 5906 ; FIX(0.720959822) 42 F_0_765 equ 6270 ; FIX(0.765366865) 43 F_0_850 equ 6967 ; FIX(0.850430095) 44 F_0_899 equ 7373 ; FIX(0.899976223) 45 F_1_061 equ 8697 ; FIX(1.061594337) 46 F_1_272 equ 10426 ; FIX(1.272758580) 47 F_1_451 equ 11893 ; FIX(1.451774981) 48 F_1_847 equ 15137 ; FIX(1.847759065) 49 F_2_172 equ 17799 ; FIX(2.172734803) 50 F_2_562 equ 20995 ; FIX(2.562915447) 51 F_3_624 equ 29692 ; FIX(3.624509785) 52 %else 53 ; NASM cannot do compile-time arithmetic on floating-point constants. 54 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) 55 F_0_211 equ DESCALE( 226735879,30-CONST_BITS) ; FIX(0.211164243) 56 F_0_509 equ DESCALE( 547388834,30-CONST_BITS) ; FIX(0.509795579) 57 F_0_601 equ DESCALE( 645689155,30-CONST_BITS) ; FIX(0.601344887) 58 F_0_720 equ DESCALE( 774124714,30-CONST_BITS) ; FIX(0.720959822) 59 F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) 60 F_0_850 equ DESCALE( 913142361,30-CONST_BITS) ; FIX(0.850430095) 61 F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) 62 F_1_061 equ DESCALE(1139878239,30-CONST_BITS) ; FIX(1.061594337) 63 F_1_272 equ DESCALE(1366614119,30-CONST_BITS) ; FIX(1.272758580) 64 F_1_451 equ DESCALE(1558831516,30-CONST_BITS) ; FIX(1.451774981) 65 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) 66 F_2_172 equ DESCALE(2332956230,30-CONST_BITS) ; FIX(2.172734803) 67 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) 68 F_3_624 equ DESCALE(3891787747,30-CONST_BITS) ; FIX(3.624509785) 69 %endif 70 71 ; -------------------------------------------------------------------------- 72 SECTION SEG_CONST 73 74 alignz 16 75 global EXTN(jconst_idct_red_sse2) PRIVATE 76 77 EXTN(jconst_idct_red_sse2): 78 79 PW_F184_MF076 times 4 dw F_1_847,-F_0_765 80 PW_F256_F089 times 4 dw F_2_562, F_0_899 81 PW_F106_MF217 times 4 dw F_1_061,-F_2_172 82 PW_MF060_MF050 times 4 dw -F_0_601,-F_0_509 83 PW_F145_MF021 times 4 dw F_1_451,-F_0_211 84 PW_F362_MF127 times 4 dw F_3_624,-F_1_272 85 PW_F085_MF072 times 4 dw F_0_850,-F_0_720 86 PD_DESCALE_P1_4 times 4 dd 1 << (DESCALE_P1_4-1) 87 PD_DESCALE_P2_4 times 4 dd 1 << (DESCALE_P2_4-1) 88 PD_DESCALE_P1_2 times 4 dd 1 << (DESCALE_P1_2-1) 89 PD_DESCALE_P2_2 times 4 dd 1 << (DESCALE_P2_2-1) 90 PB_CENTERJSAMP times 16 db CENTERJSAMPLE 91 92 alignz 16 93 94 ; -------------------------------------------------------------------------- 95 SECTION SEG_TEXT 96 BITS 32 97 ; 98 ; Perform dequantization and inverse DCT on one block of coefficients, 99 ; producing a reduced-size 4x4 output block. 100 ; 101 ; GLOBAL(void) 102 ; jsimd_idct_4x4_sse2 (void * dct_table, JCOEFPTR coef_block, 103 ; JSAMPARRAY output_buf, JDIMENSION output_col) 104 ; 105 106 %define dct_table(b) (b)+8 ; void * dct_table 107 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block 108 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf 109 %define output_col(b) (b)+20 ; JDIMENSION output_col 110 111 %define original_ebp ebp+0 112 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] 113 %define WK_NUM 2 114 115 align 16 116 global EXTN(jsimd_idct_4x4_sse2) PRIVATE 117 118 EXTN(jsimd_idct_4x4_sse2): 119 push ebp 120 mov eax,esp ; eax = original ebp 121 sub esp, byte 4 122 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 123 mov [esp],eax 124 mov ebp,esp ; ebp = aligned ebp 125 lea esp, [wk(0)] 126 pushpic ebx 127 ; push ecx ; unused 128 ; push edx ; need not be preserved 129 push esi 130 push edi 131 132 get_GOT ebx ; get GOT address 133 134 ; ---- Pass 1: process columns from input. 135 136 ; mov eax, [original_ebp] 137 mov edx, POINTER [dct_table(eax)] ; quantptr 138 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 139 140 %ifndef NO_ZERO_COLUMN_TEST_4X4_SSE2 141 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 142 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 143 jnz short .columnDCT 144 145 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] 146 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)] 147 por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] 148 por xmm1, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] 149 por xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] 150 por xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] 151 por xmm0,xmm1 152 packsswb xmm0,xmm0 153 packsswb xmm0,xmm0 154 movd eax,xmm0 155 test eax,eax 156 jnz short .columnDCT 157 158 ; -- AC terms all zero 159 160 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] 161 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 162 163 psllw xmm0,PASS1_BITS 164 165 movdqa xmm3,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07) 166 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03) 167 punpckhwd xmm3,xmm3 ; xmm3=(04 04 05 05 06 06 07 07) 168 169 pshufd xmm1,xmm0,0x50 ; xmm1=[col0 col1]=(00 00 00 00 01 01 01 01) 170 pshufd xmm0,xmm0,0xFA ; xmm0=[col2 col3]=(02 02 02 02 03 03 03 03) 171 pshufd xmm6,xmm3,0x50 ; xmm6=[col4 col5]=(04 04 04 04 05 05 05 05) 172 pshufd xmm3,xmm3,0xFA ; xmm3=[col6 col7]=(06 06 06 06 07 07 07 07) 173 174 jmp near .column_end 175 alignx 16,7 176 %endif 177 .columnDCT: 178 179 ; -- Odd part 180 181 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] 182 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] 183 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 184 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 185 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] 186 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] 187 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 188 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 189 190 movdqa xmm4,xmm0 191 movdqa xmm5,xmm0 192 punpcklwd xmm4,xmm1 193 punpckhwd xmm5,xmm1 194 movdqa xmm0,xmm4 195 movdqa xmm1,xmm5 196 pmaddwd xmm4,[GOTOFF(ebx,PW_F256_F089)] ; xmm4=(tmp2L) 197 pmaddwd xmm5,[GOTOFF(ebx,PW_F256_F089)] ; xmm5=(tmp2H) 198 pmaddwd xmm0,[GOTOFF(ebx,PW_F106_MF217)] ; xmm0=(tmp0L) 199 pmaddwd xmm1,[GOTOFF(ebx,PW_F106_MF217)] ; xmm1=(tmp0H) 200 201 movdqa xmm6,xmm2 202 movdqa xmm7,xmm2 203 punpcklwd xmm6,xmm3 204 punpckhwd xmm7,xmm3 205 movdqa xmm2,xmm6 206 movdqa xmm3,xmm7 207 pmaddwd xmm6,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2L) 208 pmaddwd xmm7,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm7=(tmp2H) 209 pmaddwd xmm2,[GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0L) 210 pmaddwd xmm3,[GOTOFF(ebx,PW_F145_MF021)] ; xmm3=(tmp0H) 211 212 paddd xmm6,xmm4 ; xmm6=tmp2L 213 paddd xmm7,xmm5 ; xmm7=tmp2H 214 paddd xmm2,xmm0 ; xmm2=tmp0L 215 paddd xmm3,xmm1 ; xmm3=tmp0H 216 217 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp0L 218 movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=tmp0H 219 220 ; -- Even part 221 222 movdqa xmm4, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] 223 movdqa xmm5, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)] 224 movdqa xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] 225 pmullw xmm4, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 226 pmullw xmm5, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 227 pmullw xmm0, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 228 229 pxor xmm1,xmm1 230 pxor xmm2,xmm2 231 punpcklwd xmm1,xmm4 ; xmm1=tmp0L 232 punpckhwd xmm2,xmm4 ; xmm2=tmp0H 233 psrad xmm1,(16-CONST_BITS-1) ; psrad xmm1,16 & pslld xmm1,CONST_BITS+1 234 psrad xmm2,(16-CONST_BITS-1) ; psrad xmm2,16 & pslld xmm2,CONST_BITS+1 235 236 movdqa xmm3,xmm5 ; xmm5=in2=z2 237 punpcklwd xmm5,xmm0 ; xmm0=in6=z3 238 punpckhwd xmm3,xmm0 239 pmaddwd xmm5,[GOTOFF(ebx,PW_F184_MF076)] ; xmm5=tmp2L 240 pmaddwd xmm3,[GOTOFF(ebx,PW_F184_MF076)] ; xmm3=tmp2H 241 242 movdqa xmm4,xmm1 243 movdqa xmm0,xmm2 244 paddd xmm1,xmm5 ; xmm1=tmp10L 245 paddd xmm2,xmm3 ; xmm2=tmp10H 246 psubd xmm4,xmm5 ; xmm4=tmp12L 247 psubd xmm0,xmm3 ; xmm0=tmp12H 248 249 ; -- Final output stage 250 251 movdqa xmm5,xmm1 252 movdqa xmm3,xmm2 253 paddd xmm1,xmm6 ; xmm1=data0L 254 paddd xmm2,xmm7 ; xmm2=data0H 255 psubd xmm5,xmm6 ; xmm5=data3L 256 psubd xmm3,xmm7 ; xmm3=data3H 257 258 movdqa xmm6,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm6=[PD_DESCALE_P1_4] 259 260 paddd xmm1,xmm6 261 paddd xmm2,xmm6 262 psrad xmm1,DESCALE_P1_4 263 psrad xmm2,DESCALE_P1_4 264 paddd xmm5,xmm6 265 paddd xmm3,xmm6 266 psrad xmm5,DESCALE_P1_4 267 psrad xmm3,DESCALE_P1_4 268 269 packssdw xmm1,xmm2 ; xmm1=data0=(00 01 02 03 04 05 06 07) 270 packssdw xmm5,xmm3 ; xmm5=data3=(30 31 32 33 34 35 36 37) 271 272 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp0L 273 movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp0H 274 275 movdqa xmm2,xmm4 276 movdqa xmm3,xmm0 277 paddd xmm4,xmm7 ; xmm4=data1L 278 paddd xmm0,xmm6 ; xmm0=data1H 279 psubd xmm2,xmm7 ; xmm2=data2L 280 psubd xmm3,xmm6 ; xmm3=data2H 281 282 movdqa xmm7,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm7=[PD_DESCALE_P1_4] 283 284 paddd xmm4,xmm7 285 paddd xmm0,xmm7 286 psrad xmm4,DESCALE_P1_4 287 psrad xmm0,DESCALE_P1_4 288 paddd xmm2,xmm7 289 paddd xmm3,xmm7 290 psrad xmm2,DESCALE_P1_4 291 psrad xmm3,DESCALE_P1_4 292 293 packssdw xmm4,xmm0 ; xmm4=data1=(10 11 12 13 14 15 16 17) 294 packssdw xmm2,xmm3 ; xmm2=data2=(20 21 22 23 24 25 26 27) 295 296 movdqa xmm6,xmm1 ; transpose coefficients(phase 1) 297 punpcklwd xmm1,xmm4 ; xmm1=(00 10 01 11 02 12 03 13) 298 punpckhwd xmm6,xmm4 ; xmm6=(04 14 05 15 06 16 07 17) 299 movdqa xmm7,xmm2 ; transpose coefficients(phase 1) 300 punpcklwd xmm2,xmm5 ; xmm2=(20 30 21 31 22 32 23 33) 301 punpckhwd xmm7,xmm5 ; xmm7=(24 34 25 35 26 36 27 37) 302 303 movdqa xmm0,xmm1 ; transpose coefficients(phase 2) 304 punpckldq xmm1,xmm2 ; xmm1=[col0 col1]=(00 10 20 30 01 11 21 31) 305 punpckhdq xmm0,xmm2 ; xmm0=[col2 col3]=(02 12 22 32 03 13 23 33) 306 movdqa xmm3,xmm6 ; transpose coefficients(phase 2) 307 punpckldq xmm6,xmm7 ; xmm6=[col4 col5]=(04 14 24 34 05 15 25 35) 308 punpckhdq xmm3,xmm7 ; xmm3=[col6 col7]=(06 16 26 36 07 17 27 37) 309 .column_end: 310 311 ; -- Prefetch the next coefficient block 312 313 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 314 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 315 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 316 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 317 318 ; ---- Pass 2: process rows, store into output array. 319 320 mov eax, [original_ebp] 321 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 322 mov eax, JDIMENSION [output_col(eax)] 323 324 ; -- Even part 325 326 pxor xmm4,xmm4 327 punpcklwd xmm4,xmm1 ; xmm4=tmp0 328 psrad xmm4,(16-CONST_BITS-1) ; psrad xmm4,16 & pslld xmm4,CONST_BITS+1 329 330 ; -- Odd part 331 332 punpckhwd xmm1,xmm0 333 punpckhwd xmm6,xmm3 334 movdqa xmm5,xmm1 335 movdqa xmm2,xmm6 336 pmaddwd xmm1,[GOTOFF(ebx,PW_F256_F089)] ; xmm1=(tmp2) 337 pmaddwd xmm6,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2) 338 pmaddwd xmm5,[GOTOFF(ebx,PW_F106_MF217)] ; xmm5=(tmp0) 339 pmaddwd xmm2,[GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0) 340 341 paddd xmm6,xmm1 ; xmm6=tmp2 342 paddd xmm2,xmm5 ; xmm2=tmp0 343 344 ; -- Even part 345 346 punpcklwd xmm0,xmm3 347 pmaddwd xmm0,[GOTOFF(ebx,PW_F184_MF076)] ; xmm0=tmp2 348 349 movdqa xmm7,xmm4 350 paddd xmm4,xmm0 ; xmm4=tmp10 351 psubd xmm7,xmm0 ; xmm7=tmp12 352 353 ; -- Final output stage 354 355 movdqa xmm1,[GOTOFF(ebx,PD_DESCALE_P2_4)] ; xmm1=[PD_DESCALE_P2_4] 356 357 movdqa xmm5,xmm4 358 movdqa xmm3,xmm7 359 paddd xmm4,xmm6 ; xmm4=data0=(00 10 20 30) 360 paddd xmm7,xmm2 ; xmm7=data1=(01 11 21 31) 361 psubd xmm5,xmm6 ; xmm5=data3=(03 13 23 33) 362 psubd xmm3,xmm2 ; xmm3=data2=(02 12 22 32) 363 364 paddd xmm4,xmm1 365 paddd xmm7,xmm1 366 psrad xmm4,DESCALE_P2_4 367 psrad xmm7,DESCALE_P2_4 368 paddd xmm5,xmm1 369 paddd xmm3,xmm1 370 psrad xmm5,DESCALE_P2_4 371 psrad xmm3,DESCALE_P2_4 372 373 packssdw xmm4,xmm3 ; xmm4=(00 10 20 30 02 12 22 32) 374 packssdw xmm7,xmm5 ; xmm7=(01 11 21 31 03 13 23 33) 375 376 movdqa xmm0,xmm4 ; transpose coefficients(phase 1) 377 punpcklwd xmm4,xmm7 ; xmm4=(00 01 10 11 20 21 30 31) 378 punpckhwd xmm0,xmm7 ; xmm0=(02 03 12 13 22 23 32 33) 379 380 movdqa xmm6,xmm4 ; transpose coefficients(phase 2) 381 punpckldq xmm4,xmm0 ; xmm4=(00 01 02 03 10 11 12 13) 382 punpckhdq xmm6,xmm0 ; xmm6=(20 21 22 23 30 31 32 33) 383 384 packsswb xmm4,xmm6 ; xmm4=(00 01 02 03 10 11 12 13 20 ..) 385 paddb xmm4,[GOTOFF(ebx,PB_CENTERJSAMP)] 386 387 pshufd xmm2,xmm4,0x39 ; xmm2=(10 11 12 13 20 21 22 23 30 ..) 388 pshufd xmm1,xmm4,0x4E ; xmm1=(20 21 22 23 30 31 32 33 00 ..) 389 pshufd xmm3,xmm4,0x93 ; xmm3=(30 31 32 33 00 01 02 03 10 ..) 390 391 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 392 mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 393 movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm4 394 movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm2 395 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 396 mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 397 movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm1 398 movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm3 399 400 pop edi 401 pop esi 402 ; pop edx ; need not be preserved 403 ; pop ecx ; unused 404 poppic ebx 405 mov esp,ebp ; esp <- aligned ebp 406 pop esp ; esp <- original ebp 407 pop ebp 408 ret 409 410 411 ; -------------------------------------------------------------------------- 412 ; 413 ; Perform dequantization and inverse DCT on one block of coefficients, 414 ; producing a reduced-size 2x2 output block. 415 ; 416 ; GLOBAL(void) 417 ; jsimd_idct_2x2_sse2 (void * dct_table, JCOEFPTR coef_block, 418 ; JSAMPARRAY output_buf, JDIMENSION output_col) 419 ; 420 421 %define dct_table(b) (b)+8 ; void * dct_table 422 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block 423 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf 424 %define output_col(b) (b)+20 ; JDIMENSION output_col 425 426 align 16 427 global EXTN(jsimd_idct_2x2_sse2) PRIVATE 428 429 EXTN(jsimd_idct_2x2_sse2): 430 push ebp 431 mov ebp,esp 432 push ebx 433 ; push ecx ; need not be preserved 434 ; push edx ; need not be preserved 435 push esi 436 push edi 437 438 get_GOT ebx ; get GOT address 439 440 ; ---- Pass 1: process columns from input. 441 442 mov edx, POINTER [dct_table(ebp)] ; quantptr 443 mov esi, JCOEFPTR [coef_block(ebp)] ; inptr 444 445 ; | input: | result: | 446 ; | 00 01 ** 03 ** 05 ** 07 | | 447 ; | 10 11 ** 13 ** 15 ** 17 | | 448 ; | ** ** ** ** ** ** ** ** | | 449 ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 | 450 ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 | 451 ; | 50 51 ** 53 ** 55 ** 57 | | 452 ; | ** ** ** ** ** ** ** ** | | 453 ; | 70 71 ** 73 ** 75 ** 77 | | 454 455 ; -- Odd part 456 457 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] 458 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] 459 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 460 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 461 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] 462 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] 463 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 464 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 465 466 ; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37) 467 ; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77) 468 469 pcmpeqd xmm7,xmm7 470 pslld xmm7,WORD_BIT ; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..} 471 472 movdqa xmm4,xmm0 ; xmm4=(10 11 ** 13 ** 15 ** 17) 473 movdqa xmm5,xmm2 ; xmm5=(50 51 ** 53 ** 55 ** 57) 474 punpcklwd xmm4,xmm1 ; xmm4=(10 30 11 31 ** ** 13 33) 475 punpcklwd xmm5,xmm3 ; xmm5=(50 70 51 71 ** ** 53 73) 476 pmaddwd xmm4,[GOTOFF(ebx,PW_F362_MF127)] 477 pmaddwd xmm5,[GOTOFF(ebx,PW_F085_MF072)] 478 479 psrld xmm0,WORD_BIT ; xmm0=(11 -- 13 -- 15 -- 17 --) 480 pand xmm1,xmm7 ; xmm1=(-- 31 -- 33 -- 35 -- 37) 481 psrld xmm2,WORD_BIT ; xmm2=(51 -- 53 -- 55 -- 57 --) 482 pand xmm3,xmm7 ; xmm3=(-- 71 -- 73 -- 75 -- 77) 483 por xmm0,xmm1 ; xmm0=(11 31 13 33 15 35 17 37) 484 por xmm2,xmm3 ; xmm2=(51 71 53 73 55 75 57 77) 485 pmaddwd xmm0,[GOTOFF(ebx,PW_F362_MF127)] 486 pmaddwd xmm2,[GOTOFF(ebx,PW_F085_MF072)] 487 488 paddd xmm4,xmm5 ; xmm4=tmp0[col0 col1 **** col3] 489 paddd xmm0,xmm2 ; xmm0=tmp0[col1 col3 col5 col7] 490 491 ; -- Even part 492 493 movdqa xmm6, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] 494 pmullw xmm6, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 495 496 ; xmm6=(00 01 ** 03 ** 05 ** 07) 497 498 movdqa xmm1,xmm6 ; xmm1=(00 01 ** 03 ** 05 ** 07) 499 pslld xmm6,WORD_BIT ; xmm6=(-- 00 -- ** -- ** -- **) 500 pand xmm1,xmm7 ; xmm1=(-- 01 -- 03 -- 05 -- 07) 501 psrad xmm6,(WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****] 502 psrad xmm1,(WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7] 503 504 ; -- Final output stage 505 506 movdqa xmm3,xmm6 507 movdqa xmm5,xmm1 508 paddd xmm6,xmm4 ; xmm6=data0[col0 **** **** ****]=(A0 ** ** **) 509 paddd xmm1,xmm0 ; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7) 510 psubd xmm3,xmm4 ; xmm3=data1[col0 **** **** ****]=(B0 ** ** **) 511 psubd xmm5,xmm0 ; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7) 512 513 movdqa xmm2,[GOTOFF(ebx,PD_DESCALE_P1_2)] ; xmm2=[PD_DESCALE_P1_2] 514 515 punpckldq xmm6,xmm3 ; xmm6=(A0 B0 ** **) 516 517 movdqa xmm7,xmm1 518 punpcklqdq xmm1,xmm5 ; xmm1=(A1 A3 B1 B3) 519 punpckhqdq xmm7,xmm5 ; xmm7=(A5 A7 B5 B7) 520 521 paddd xmm6,xmm2 522 psrad xmm6,DESCALE_P1_2 523 524 paddd xmm1,xmm2 525 paddd xmm7,xmm2 526 psrad xmm1,DESCALE_P1_2 527 psrad xmm7,DESCALE_P1_2 528 529 ; -- Prefetch the next coefficient block 530 531 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 532 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 533 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 534 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 535 536 ; ---- Pass 2: process rows, store into output array. 537 538 mov edi, JSAMPARRAY [output_buf(ebp)] ; (JSAMPROW *) 539 mov eax, JDIMENSION [output_col(ebp)] 540 541 ; | input:| result:| 542 ; | A0 B0 | | 543 ; | A1 B1 | C0 C1 | 544 ; | A3 B3 | D0 D1 | 545 ; | A5 B5 | | 546 ; | A7 B7 | | 547 548 ; -- Odd part 549 550 packssdw xmm1,xmm1 ; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3) 551 packssdw xmm7,xmm7 ; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7) 552 pmaddwd xmm1,[GOTOFF(ebx,PW_F362_MF127)] 553 pmaddwd xmm7,[GOTOFF(ebx,PW_F085_MF072)] 554 555 paddd xmm1,xmm7 ; xmm1=tmp0[row0 row1 row0 row1] 556 557 ; -- Even part 558 559 pslld xmm6,(CONST_BITS+2) ; xmm6=tmp10[row0 row1 **** ****] 560 561 ; -- Final output stage 562 563 movdqa xmm4,xmm6 564 paddd xmm6,xmm1 ; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **) 565 psubd xmm4,xmm1 ; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **) 566 567 punpckldq xmm6,xmm4 ; xmm6=(C0 D0 C1 D1) 568 569 paddd xmm6,[GOTOFF(ebx,PD_DESCALE_P2_2)] 570 psrad xmm6,DESCALE_P2_2 571 572 packssdw xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1) 573 packsswb xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..) 574 paddb xmm6,[GOTOFF(ebx,PB_CENTERJSAMP)] 575 576 pextrw ebx,xmm6,0x00 ; ebx=(C0 D0 -- --) 577 pextrw ecx,xmm6,0x01 ; ecx=(C1 D1 -- --) 578 579 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 580 mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 581 mov WORD [edx+eax*SIZEOF_JSAMPLE], bx 582 mov WORD [esi+eax*SIZEOF_JSAMPLE], cx 583 584 pop edi 585 pop esi 586 ; pop edx ; need not be preserved 587 ; pop ecx ; need not be preserved 588 pop ebx 589 pop ebp 590 ret 591 592 ; For some reason, the OS X linker does not honor the request to align the 593 ; segment unless we do this. 594 align 16 595
