1 ; 2 ; jidctred.asm - reduced-size IDCT (64-bit SSE2) 3 ; 4 ; Copyright 2009 Pierre Ossman <ossman (a] cendio.se> for Cendio AB 5 ; Copyright (C) 2009, 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 ; 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) 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 64 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 ; r10 = void *dct_table 107 ; r11 = JCOEFPTR coef_block 108 ; r12 = JSAMPARRAY output_buf 109 ; r13 = JDIMENSION output_col 110 111 %define original_rbp rbp+0 112 %define wk(i) rbp-(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) 117 118 EXTN(jsimd_idct_4x4_sse2): 119 push rbp 120 mov rax,rsp ; rax = original rbp 121 sub rsp, byte 4 122 and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 123 mov [rsp],rax 124 mov rbp,rsp ; rbp = aligned rbp 125 lea rsp, [wk(0)] 126 collect_args 127 128 ; ---- Pass 1: process columns from input. 129 130 mov rdx, r10 ; quantptr 131 mov rsi, r11 ; inptr 132 133 %ifndef NO_ZERO_COLUMN_TEST_4X4_SSE2 134 mov eax, DWORD [DWBLOCK(1,0,rsi,SIZEOF_JCOEF)] 135 or eax, DWORD [DWBLOCK(2,0,rsi,SIZEOF_JCOEF)] 136 jnz short .columnDCT 137 138 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)] 139 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)] 140 por xmm0, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)] 141 por xmm1, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)] 142 por xmm0, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)] 143 por xmm1, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)] 144 por xmm0,xmm1 145 packsswb xmm0,xmm0 146 packsswb xmm0,xmm0 147 movd eax,xmm0 148 test rax,rax 149 jnz short .columnDCT 150 151 ; -- AC terms all zero 152 153 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)] 154 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 155 156 psllw xmm0,PASS1_BITS 157 158 movdqa xmm3,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07) 159 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03) 160 punpckhwd xmm3,xmm3 ; xmm3=(04 04 05 05 06 06 07 07) 161 162 pshufd xmm1,xmm0,0x50 ; xmm1=[col0 col1]=(00 00 00 00 01 01 01 01) 163 pshufd xmm0,xmm0,0xFA ; xmm0=[col2 col3]=(02 02 02 02 03 03 03 03) 164 pshufd xmm6,xmm3,0x50 ; xmm6=[col4 col5]=(04 04 04 04 05 05 05 05) 165 pshufd xmm3,xmm3,0xFA ; xmm3=[col6 col7]=(06 06 06 06 07 07 07 07) 166 167 jmp near .column_end 168 %endif 169 .columnDCT: 170 171 ; -- Odd part 172 173 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)] 174 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)] 175 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 176 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 177 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)] 178 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)] 179 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 180 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 181 182 movdqa xmm4,xmm0 183 movdqa xmm5,xmm0 184 punpcklwd xmm4,xmm1 185 punpckhwd xmm5,xmm1 186 movdqa xmm0,xmm4 187 movdqa xmm1,xmm5 188 pmaddwd xmm4,[rel PW_F256_F089] ; xmm4=(tmp2L) 189 pmaddwd xmm5,[rel PW_F256_F089] ; xmm5=(tmp2H) 190 pmaddwd xmm0,[rel PW_F106_MF217] ; xmm0=(tmp0L) 191 pmaddwd xmm1,[rel PW_F106_MF217] ; xmm1=(tmp0H) 192 193 movdqa xmm6,xmm2 194 movdqa xmm7,xmm2 195 punpcklwd xmm6,xmm3 196 punpckhwd xmm7,xmm3 197 movdqa xmm2,xmm6 198 movdqa xmm3,xmm7 199 pmaddwd xmm6,[rel PW_MF060_MF050] ; xmm6=(tmp2L) 200 pmaddwd xmm7,[rel PW_MF060_MF050] ; xmm7=(tmp2H) 201 pmaddwd xmm2,[rel PW_F145_MF021] ; xmm2=(tmp0L) 202 pmaddwd xmm3,[rel PW_F145_MF021] ; xmm3=(tmp0H) 203 204 paddd xmm6,xmm4 ; xmm6=tmp2L 205 paddd xmm7,xmm5 ; xmm7=tmp2H 206 paddd xmm2,xmm0 ; xmm2=tmp0L 207 paddd xmm3,xmm1 ; xmm3=tmp0H 208 209 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp0L 210 movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=tmp0H 211 212 ; -- Even part 213 214 movdqa xmm4, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)] 215 movdqa xmm5, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)] 216 movdqa xmm0, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)] 217 pmullw xmm4, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 218 pmullw xmm5, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 219 pmullw xmm0, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 220 221 pxor xmm1,xmm1 222 pxor xmm2,xmm2 223 punpcklwd xmm1,xmm4 ; xmm1=tmp0L 224 punpckhwd xmm2,xmm4 ; xmm2=tmp0H 225 psrad xmm1,(16-CONST_BITS-1) ; psrad xmm1,16 & pslld xmm1,CONST_BITS+1 226 psrad xmm2,(16-CONST_BITS-1) ; psrad xmm2,16 & pslld xmm2,CONST_BITS+1 227 228 movdqa xmm3,xmm5 ; xmm5=in2=z2 229 punpcklwd xmm5,xmm0 ; xmm0=in6=z3 230 punpckhwd xmm3,xmm0 231 pmaddwd xmm5,[rel PW_F184_MF076] ; xmm5=tmp2L 232 pmaddwd xmm3,[rel PW_F184_MF076] ; xmm3=tmp2H 233 234 movdqa xmm4,xmm1 235 movdqa xmm0,xmm2 236 paddd xmm1,xmm5 ; xmm1=tmp10L 237 paddd xmm2,xmm3 ; xmm2=tmp10H 238 psubd xmm4,xmm5 ; xmm4=tmp12L 239 psubd xmm0,xmm3 ; xmm0=tmp12H 240 241 ; -- Final output stage 242 243 movdqa xmm5,xmm1 244 movdqa xmm3,xmm2 245 paddd xmm1,xmm6 ; xmm1=data0L 246 paddd xmm2,xmm7 ; xmm2=data0H 247 psubd xmm5,xmm6 ; xmm5=data3L 248 psubd xmm3,xmm7 ; xmm3=data3H 249 250 movdqa xmm6,[rel PD_DESCALE_P1_4] ; xmm6=[rel PD_DESCALE_P1_4] 251 252 paddd xmm1,xmm6 253 paddd xmm2,xmm6 254 psrad xmm1,DESCALE_P1_4 255 psrad xmm2,DESCALE_P1_4 256 paddd xmm5,xmm6 257 paddd xmm3,xmm6 258 psrad xmm5,DESCALE_P1_4 259 psrad xmm3,DESCALE_P1_4 260 261 packssdw xmm1,xmm2 ; xmm1=data0=(00 01 02 03 04 05 06 07) 262 packssdw xmm5,xmm3 ; xmm5=data3=(30 31 32 33 34 35 36 37) 263 264 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp0L 265 movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp0H 266 267 movdqa xmm2,xmm4 268 movdqa xmm3,xmm0 269 paddd xmm4,xmm7 ; xmm4=data1L 270 paddd xmm0,xmm6 ; xmm0=data1H 271 psubd xmm2,xmm7 ; xmm2=data2L 272 psubd xmm3,xmm6 ; xmm3=data2H 273 274 movdqa xmm7,[rel PD_DESCALE_P1_4] ; xmm7=[rel PD_DESCALE_P1_4] 275 276 paddd xmm4,xmm7 277 paddd xmm0,xmm7 278 psrad xmm4,DESCALE_P1_4 279 psrad xmm0,DESCALE_P1_4 280 paddd xmm2,xmm7 281 paddd xmm3,xmm7 282 psrad xmm2,DESCALE_P1_4 283 psrad xmm3,DESCALE_P1_4 284 285 packssdw xmm4,xmm0 ; xmm4=data1=(10 11 12 13 14 15 16 17) 286 packssdw xmm2,xmm3 ; xmm2=data2=(20 21 22 23 24 25 26 27) 287 288 movdqa xmm6,xmm1 ; transpose coefficients(phase 1) 289 punpcklwd xmm1,xmm4 ; xmm1=(00 10 01 11 02 12 03 13) 290 punpckhwd xmm6,xmm4 ; xmm6=(04 14 05 15 06 16 07 17) 291 movdqa xmm7,xmm2 ; transpose coefficients(phase 1) 292 punpcklwd xmm2,xmm5 ; xmm2=(20 30 21 31 22 32 23 33) 293 punpckhwd xmm7,xmm5 ; xmm7=(24 34 25 35 26 36 27 37) 294 295 movdqa xmm0,xmm1 ; transpose coefficients(phase 2) 296 punpckldq xmm1,xmm2 ; xmm1=[col0 col1]=(00 10 20 30 01 11 21 31) 297 punpckhdq xmm0,xmm2 ; xmm0=[col2 col3]=(02 12 22 32 03 13 23 33) 298 movdqa xmm3,xmm6 ; transpose coefficients(phase 2) 299 punpckldq xmm6,xmm7 ; xmm6=[col4 col5]=(04 14 24 34 05 15 25 35) 300 punpckhdq xmm3,xmm7 ; xmm3=[col6 col7]=(06 16 26 36 07 17 27 37) 301 .column_end: 302 303 ; -- Prefetch the next coefficient block 304 305 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 306 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 307 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 308 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 309 310 ; ---- Pass 2: process rows, store into output array. 311 312 mov rax, [original_rbp] 313 mov rdi, r12 ; (JSAMPROW *) 314 mov eax, r13d 315 316 ; -- Even part 317 318 pxor xmm4,xmm4 319 punpcklwd xmm4,xmm1 ; xmm4=tmp0 320 psrad xmm4,(16-CONST_BITS-1) ; psrad xmm4,16 & pslld xmm4,CONST_BITS+1 321 322 ; -- Odd part 323 324 punpckhwd xmm1,xmm0 325 punpckhwd xmm6,xmm3 326 movdqa xmm5,xmm1 327 movdqa xmm2,xmm6 328 pmaddwd xmm1,[rel PW_F256_F089] ; xmm1=(tmp2) 329 pmaddwd xmm6,[rel PW_MF060_MF050] ; xmm6=(tmp2) 330 pmaddwd xmm5,[rel PW_F106_MF217] ; xmm5=(tmp0) 331 pmaddwd xmm2,[rel PW_F145_MF021] ; xmm2=(tmp0) 332 333 paddd xmm6,xmm1 ; xmm6=tmp2 334 paddd xmm2,xmm5 ; xmm2=tmp0 335 336 ; -- Even part 337 338 punpcklwd xmm0,xmm3 339 pmaddwd xmm0,[rel PW_F184_MF076] ; xmm0=tmp2 340 341 movdqa xmm7,xmm4 342 paddd xmm4,xmm0 ; xmm4=tmp10 343 psubd xmm7,xmm0 ; xmm7=tmp12 344 345 ; -- Final output stage 346 347 movdqa xmm1,[rel PD_DESCALE_P2_4] ; xmm1=[rel PD_DESCALE_P2_4] 348 349 movdqa xmm5,xmm4 350 movdqa xmm3,xmm7 351 paddd xmm4,xmm6 ; xmm4=data0=(00 10 20 30) 352 paddd xmm7,xmm2 ; xmm7=data1=(01 11 21 31) 353 psubd xmm5,xmm6 ; xmm5=data3=(03 13 23 33) 354 psubd xmm3,xmm2 ; xmm3=data2=(02 12 22 32) 355 356 paddd xmm4,xmm1 357 paddd xmm7,xmm1 358 psrad xmm4,DESCALE_P2_4 359 psrad xmm7,DESCALE_P2_4 360 paddd xmm5,xmm1 361 paddd xmm3,xmm1 362 psrad xmm5,DESCALE_P2_4 363 psrad xmm3,DESCALE_P2_4 364 365 packssdw xmm4,xmm3 ; xmm4=(00 10 20 30 02 12 22 32) 366 packssdw xmm7,xmm5 ; xmm7=(01 11 21 31 03 13 23 33) 367 368 movdqa xmm0,xmm4 ; transpose coefficients(phase 1) 369 punpcklwd xmm4,xmm7 ; xmm4=(00 01 10 11 20 21 30 31) 370 punpckhwd xmm0,xmm7 ; xmm0=(02 03 12 13 22 23 32 33) 371 372 movdqa xmm6,xmm4 ; transpose coefficients(phase 2) 373 punpckldq xmm4,xmm0 ; xmm4=(00 01 02 03 10 11 12 13) 374 punpckhdq xmm6,xmm0 ; xmm6=(20 21 22 23 30 31 32 33) 375 376 packsswb xmm4,xmm6 ; xmm4=(00 01 02 03 10 11 12 13 20 ..) 377 paddb xmm4,[rel PB_CENTERJSAMP] 378 379 pshufd xmm2,xmm4,0x39 ; xmm2=(10 11 12 13 20 21 22 23 30 ..) 380 pshufd xmm1,xmm4,0x4E ; xmm1=(20 21 22 23 30 31 32 33 00 ..) 381 pshufd xmm3,xmm4,0x93 ; xmm3=(30 31 32 33 00 01 02 03 10 ..) 382 383 mov rdx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] 384 mov rsi, JSAMPROW [rdi+1*SIZEOF_JSAMPROW] 385 movd XMM_DWORD [rdx+rax*SIZEOF_JSAMPLE], xmm4 386 movd XMM_DWORD [rsi+rax*SIZEOF_JSAMPLE], xmm2 387 mov rdx, JSAMPROW [rdi+2*SIZEOF_JSAMPROW] 388 mov rsi, JSAMPROW [rdi+3*SIZEOF_JSAMPROW] 389 movd XMM_DWORD [rdx+rax*SIZEOF_JSAMPLE], xmm1 390 movd XMM_DWORD [rsi+rax*SIZEOF_JSAMPLE], xmm3 391 392 uncollect_args 393 mov rsp,rbp ; rsp <- aligned rbp 394 pop rsp ; rsp <- original rbp 395 pop rbp 396 ret 397 398 399 ; -------------------------------------------------------------------------- 400 ; 401 ; Perform dequantization and inverse DCT on one block of coefficients, 402 ; producing a reduced-size 2x2 output block. 403 ; 404 ; GLOBAL(void) 405 ; jsimd_idct_2x2_sse2 (void *dct_table, JCOEFPTR coef_block, 406 ; JSAMPARRAY output_buf, JDIMENSION output_col) 407 ; 408 409 ; r10 = void *dct_table 410 ; r11 = JCOEFPTR coef_block 411 ; r12 = JSAMPARRAY output_buf 412 ; r13 = JDIMENSION output_col 413 414 align 16 415 global EXTN(jsimd_idct_2x2_sse2) 416 417 EXTN(jsimd_idct_2x2_sse2): 418 push rbp 419 mov rax,rsp 420 mov rbp,rsp 421 collect_args 422 push rbx 423 424 ; ---- Pass 1: process columns from input. 425 426 mov rdx, r10 ; quantptr 427 mov rsi, r11 ; inptr 428 429 ; | input: | result: | 430 ; | 00 01 ** 03 ** 05 ** 07 | | 431 ; | 10 11 ** 13 ** 15 ** 17 | | 432 ; | ** ** ** ** ** ** ** ** | | 433 ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 | 434 ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 | 435 ; | 50 51 ** 53 ** 55 ** 57 | | 436 ; | ** ** ** ** ** ** ** ** | | 437 ; | 70 71 ** 73 ** 75 ** 77 | | 438 439 ; -- Odd part 440 441 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)] 442 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)] 443 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 444 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 445 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)] 446 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)] 447 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 448 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 449 450 ; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37) 451 ; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77) 452 453 pcmpeqd xmm7,xmm7 454 pslld xmm7,WORD_BIT ; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..} 455 456 movdqa xmm4,xmm0 ; xmm4=(10 11 ** 13 ** 15 ** 17) 457 movdqa xmm5,xmm2 ; xmm5=(50 51 ** 53 ** 55 ** 57) 458 punpcklwd xmm4,xmm1 ; xmm4=(10 30 11 31 ** ** 13 33) 459 punpcklwd xmm5,xmm3 ; xmm5=(50 70 51 71 ** ** 53 73) 460 pmaddwd xmm4,[rel PW_F362_MF127] 461 pmaddwd xmm5,[rel PW_F085_MF072] 462 463 psrld xmm0,WORD_BIT ; xmm0=(11 -- 13 -- 15 -- 17 --) 464 pand xmm1,xmm7 ; xmm1=(-- 31 -- 33 -- 35 -- 37) 465 psrld xmm2,WORD_BIT ; xmm2=(51 -- 53 -- 55 -- 57 --) 466 pand xmm3,xmm7 ; xmm3=(-- 71 -- 73 -- 75 -- 77) 467 por xmm0,xmm1 ; xmm0=(11 31 13 33 15 35 17 37) 468 por xmm2,xmm3 ; xmm2=(51 71 53 73 55 75 57 77) 469 pmaddwd xmm0,[rel PW_F362_MF127] 470 pmaddwd xmm2,[rel PW_F085_MF072] 471 472 paddd xmm4,xmm5 ; xmm4=tmp0[col0 col1 **** col3] 473 paddd xmm0,xmm2 ; xmm0=tmp0[col1 col3 col5 col7] 474 475 ; -- Even part 476 477 movdqa xmm6, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)] 478 pmullw xmm6, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 479 480 ; xmm6=(00 01 ** 03 ** 05 ** 07) 481 482 movdqa xmm1,xmm6 ; xmm1=(00 01 ** 03 ** 05 ** 07) 483 pslld xmm6,WORD_BIT ; xmm6=(-- 00 -- ** -- ** -- **) 484 pand xmm1,xmm7 ; xmm1=(-- 01 -- 03 -- 05 -- 07) 485 psrad xmm6,(WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****] 486 psrad xmm1,(WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7] 487 488 ; -- Final output stage 489 490 movdqa xmm3,xmm6 491 movdqa xmm5,xmm1 492 paddd xmm6,xmm4 ; xmm6=data0[col0 **** **** ****]=(A0 ** ** **) 493 paddd xmm1,xmm0 ; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7) 494 psubd xmm3,xmm4 ; xmm3=data1[col0 **** **** ****]=(B0 ** ** **) 495 psubd xmm5,xmm0 ; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7) 496 497 movdqa xmm2,[rel PD_DESCALE_P1_2] ; xmm2=[rel PD_DESCALE_P1_2] 498 499 punpckldq xmm6,xmm3 ; xmm6=(A0 B0 ** **) 500 501 movdqa xmm7,xmm1 502 punpcklqdq xmm1,xmm5 ; xmm1=(A1 A3 B1 B3) 503 punpckhqdq xmm7,xmm5 ; xmm7=(A5 A7 B5 B7) 504 505 paddd xmm6,xmm2 506 psrad xmm6,DESCALE_P1_2 507 508 paddd xmm1,xmm2 509 paddd xmm7,xmm2 510 psrad xmm1,DESCALE_P1_2 511 psrad xmm7,DESCALE_P1_2 512 513 ; -- Prefetch the next coefficient block 514 515 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 516 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 517 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 518 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 519 520 ; ---- Pass 2: process rows, store into output array. 521 522 mov rdi, r12 ; (JSAMPROW *) 523 mov eax, r13d 524 525 ; | input:| result:| 526 ; | A0 B0 | | 527 ; | A1 B1 | C0 C1 | 528 ; | A3 B3 | D0 D1 | 529 ; | A5 B5 | | 530 ; | A7 B7 | | 531 532 ; -- Odd part 533 534 packssdw xmm1,xmm1 ; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3) 535 packssdw xmm7,xmm7 ; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7) 536 pmaddwd xmm1,[rel PW_F362_MF127] 537 pmaddwd xmm7,[rel PW_F085_MF072] 538 539 paddd xmm1,xmm7 ; xmm1=tmp0[row0 row1 row0 row1] 540 541 ; -- Even part 542 543 pslld xmm6,(CONST_BITS+2) ; xmm6=tmp10[row0 row1 **** ****] 544 545 ; -- Final output stage 546 547 movdqa xmm4,xmm6 548 paddd xmm6,xmm1 ; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **) 549 psubd xmm4,xmm1 ; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **) 550 551 punpckldq xmm6,xmm4 ; xmm6=(C0 D0 C1 D1) 552 553 paddd xmm6,[rel PD_DESCALE_P2_2] 554 psrad xmm6,DESCALE_P2_2 555 556 packssdw xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1) 557 packsswb xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..) 558 paddb xmm6,[rel PB_CENTERJSAMP] 559 560 pextrw ebx,xmm6,0x00 ; ebx=(C0 D0 -- --) 561 pextrw ecx,xmm6,0x01 ; ecx=(C1 D1 -- --) 562 563 mov rdx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] 564 mov rsi, JSAMPROW [rdi+1*SIZEOF_JSAMPROW] 565 mov WORD [rdx+rax*SIZEOF_JSAMPLE], bx 566 mov WORD [rsi+rax*SIZEOF_JSAMPLE], cx 567 568 pop rbx 569 uncollect_args 570 pop rbp 571 ret 572 573 ; For some reason, the OS X linker does not honor the request to align the 574 ; segment unless we do this. 575 align 16 576
