1 ; 2 ; jiss2red-64.asm - reduced-size IDCT (64-bit SSE2) 3 ; 4 ; Copyright 2009 Pierre Ossman <ossman (a] cendio.se> for Cendio AB 5 ; Copyright 2009 D. R. Commander 6 ; 7 ; Based on 8 ; x86 SIMD extension for IJG JPEG library 9 ; Copyright (C) 1999-2006, MIYASAKA Masaru. 10 ; For conditions of distribution and use, see copyright notice in jsimdext.inc 11 ; 12 ; This file should be assembled with NASM (Netwide Assembler), 13 ; can *not* be assembled with Microsoft's MASM or any compatible 14 ; assembler (including Borland's Turbo Assembler). 15 ; NASM is available from http://nasm.sourceforge.net/ or 16 ; http://sourceforge.net/project/showfiles.php?group_id=6208 17 ; 18 ; This file contains inverse-DCT routines that produce reduced-size 19 ; output: either 4x4 or 2x2 pixels from an 8x8 DCT block. 20 ; The following code is based directly on the IJG's original jidctred.c; 21 ; see the jidctred.c for more details. 22 ; 23 ; [TAB8] 24 25 %include "jsimdext.inc" 26 %include "jdct.inc" 27 28 ; -------------------------------------------------------------------------- 29 30 %define CONST_BITS 13 31 %define PASS1_BITS 2 32 33 %define DESCALE_P1_4 (CONST_BITS-PASS1_BITS+1) 34 %define DESCALE_P2_4 (CONST_BITS+PASS1_BITS+3+1) 35 %define DESCALE_P1_2 (CONST_BITS-PASS1_BITS+2) 36 %define DESCALE_P2_2 (CONST_BITS+PASS1_BITS+3+2) 37 38 %if CONST_BITS == 13 39 F_0_211 equ 1730 ; FIX(0.211164243) 40 F_0_509 equ 4176 ; FIX(0.509795579) 41 F_0_601 equ 4926 ; FIX(0.601344887) 42 F_0_720 equ 5906 ; FIX(0.720959822) 43 F_0_765 equ 6270 ; FIX(0.765366865) 44 F_0_850 equ 6967 ; FIX(0.850430095) 45 F_0_899 equ 7373 ; FIX(0.899976223) 46 F_1_061 equ 8697 ; FIX(1.061594337) 47 F_1_272 equ 10426 ; FIX(1.272758580) 48 F_1_451 equ 11893 ; FIX(1.451774981) 49 F_1_847 equ 15137 ; FIX(1.847759065) 50 F_2_172 equ 17799 ; FIX(2.172734803) 51 F_2_562 equ 20995 ; FIX(2.562915447) 52 F_3_624 equ 29692 ; FIX(3.624509785) 53 %else 54 ; NASM cannot do compile-time arithmetic on floating-point constants. 55 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) 56 F_0_211 equ DESCALE( 226735879,30-CONST_BITS) ; FIX(0.211164243) 57 F_0_509 equ DESCALE( 547388834,30-CONST_BITS) ; FIX(0.509795579) 58 F_0_601 equ DESCALE( 645689155,30-CONST_BITS) ; FIX(0.601344887) 59 F_0_720 equ DESCALE( 774124714,30-CONST_BITS) ; FIX(0.720959822) 60 F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) 61 F_0_850 equ DESCALE( 913142361,30-CONST_BITS) ; FIX(0.850430095) 62 F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) 63 F_1_061 equ DESCALE(1139878239,30-CONST_BITS) ; FIX(1.061594337) 64 F_1_272 equ DESCALE(1366614119,30-CONST_BITS) ; FIX(1.272758580) 65 F_1_451 equ DESCALE(1558831516,30-CONST_BITS) ; FIX(1.451774981) 66 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) 67 F_2_172 equ DESCALE(2332956230,30-CONST_BITS) ; FIX(2.172734803) 68 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) 69 F_3_624 equ DESCALE(3891787747,30-CONST_BITS) ; FIX(3.624509785) 70 %endif 71 72 ; -------------------------------------------------------------------------- 73 SECTION SEG_CONST 74 75 alignz 16 76 global EXTN(jconst_idct_red_sse2) PRIVATE 77 78 EXTN(jconst_idct_red_sse2): 79 80 PW_F184_MF076 times 4 dw F_1_847,-F_0_765 81 PW_F256_F089 times 4 dw F_2_562, F_0_899 82 PW_F106_MF217 times 4 dw F_1_061,-F_2_172 83 PW_MF060_MF050 times 4 dw -F_0_601,-F_0_509 84 PW_F145_MF021 times 4 dw F_1_451,-F_0_211 85 PW_F362_MF127 times 4 dw F_3_624,-F_1_272 86 PW_F085_MF072 times 4 dw F_0_850,-F_0_720 87 PD_DESCALE_P1_4 times 4 dd 1 << (DESCALE_P1_4-1) 88 PD_DESCALE_P2_4 times 4 dd 1 << (DESCALE_P2_4-1) 89 PD_DESCALE_P1_2 times 4 dd 1 << (DESCALE_P1_2-1) 90 PD_DESCALE_P2_2 times 4 dd 1 << (DESCALE_P2_2-1) 91 PB_CENTERJSAMP times 16 db CENTERJSAMPLE 92 93 alignz 16 94 95 ; -------------------------------------------------------------------------- 96 SECTION SEG_TEXT 97 BITS 64 98 ; 99 ; Perform dequantization and inverse DCT on one block of coefficients, 100 ; producing a reduced-size 4x4 output block. 101 ; 102 ; GLOBAL(void) 103 ; jsimd_idct_4x4_sse2 (void * dct_table, JCOEFPTR coef_block, 104 ; JSAMPARRAY output_buf, JDIMENSION output_col) 105 ; 106 107 ; r10 = void * dct_table 108 ; r11 = JCOEFPTR coef_block 109 ; r12 = JSAMPARRAY output_buf 110 ; r13 = JDIMENSION output_col 111 112 %define original_rbp rbp+0 113 %define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] 114 %define WK_NUM 2 115 116 align 16 117 global EXTN(jsimd_idct_4x4_sse2) PRIVATE 118 119 EXTN(jsimd_idct_4x4_sse2): 120 push rbp 121 mov rax,rsp ; rax = original rbp 122 sub rsp, byte 4 123 and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 124 mov [rsp],rax 125 mov rbp,rsp ; rbp = aligned rbp 126 lea rsp, [wk(0)] 127 collect_args 128 129 ; ---- Pass 1: process columns from input. 130 131 mov rdx, r10 ; quantptr 132 mov rsi, r11 ; inptr 133 134 %ifndef NO_ZERO_COLUMN_TEST_4X4_SSE2 135 mov eax, DWORD [DWBLOCK(1,0,rsi,SIZEOF_JCOEF)] 136 or eax, DWORD [DWBLOCK(2,0,rsi,SIZEOF_JCOEF)] 137 jnz short .columnDCT 138 139 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)] 140 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)] 141 por xmm0, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)] 142 por xmm1, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)] 143 por xmm0, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)] 144 por xmm1, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)] 145 por xmm0,xmm1 146 packsswb xmm0,xmm0 147 packsswb xmm0,xmm0 148 movd eax,xmm0 149 test rax,rax 150 jnz short .columnDCT 151 152 ; -- AC terms all zero 153 154 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)] 155 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 156 157 psllw xmm0,PASS1_BITS 158 159 movdqa xmm3,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07) 160 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03) 161 punpckhwd xmm3,xmm3 ; xmm3=(04 04 05 05 06 06 07 07) 162 163 pshufd xmm1,xmm0,0x50 ; xmm1=[col0 col1]=(00 00 00 00 01 01 01 01) 164 pshufd xmm0,xmm0,0xFA ; xmm0=[col2 col3]=(02 02 02 02 03 03 03 03) 165 pshufd xmm6,xmm3,0x50 ; xmm6=[col4 col5]=(04 04 04 04 05 05 05 05) 166 pshufd xmm3,xmm3,0xFA ; xmm3=[col6 col7]=(06 06 06 06 07 07 07 07) 167 168 jmp near .column_end 169 %endif 170 .columnDCT: 171 172 ; -- Odd part 173 174 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)] 175 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)] 176 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 177 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 178 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)] 179 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)] 180 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 181 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 182 183 movdqa xmm4,xmm0 184 movdqa xmm5,xmm0 185 punpcklwd xmm4,xmm1 186 punpckhwd xmm5,xmm1 187 movdqa xmm0,xmm4 188 movdqa xmm1,xmm5 189 pmaddwd xmm4,[rel PW_F256_F089] ; xmm4=(tmp2L) 190 pmaddwd xmm5,[rel PW_F256_F089] ; xmm5=(tmp2H) 191 pmaddwd xmm0,[rel PW_F106_MF217] ; xmm0=(tmp0L) 192 pmaddwd xmm1,[rel PW_F106_MF217] ; xmm1=(tmp0H) 193 194 movdqa xmm6,xmm2 195 movdqa xmm7,xmm2 196 punpcklwd xmm6,xmm3 197 punpckhwd xmm7,xmm3 198 movdqa xmm2,xmm6 199 movdqa xmm3,xmm7 200 pmaddwd xmm6,[rel PW_MF060_MF050] ; xmm6=(tmp2L) 201 pmaddwd xmm7,[rel PW_MF060_MF050] ; xmm7=(tmp2H) 202 pmaddwd xmm2,[rel PW_F145_MF021] ; xmm2=(tmp0L) 203 pmaddwd xmm3,[rel PW_F145_MF021] ; xmm3=(tmp0H) 204 205 paddd xmm6,xmm4 ; xmm6=tmp2L 206 paddd xmm7,xmm5 ; xmm7=tmp2H 207 paddd xmm2,xmm0 ; xmm2=tmp0L 208 paddd xmm3,xmm1 ; xmm3=tmp0H 209 210 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp0L 211 movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=tmp0H 212 213 ; -- Even part 214 215 movdqa xmm4, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)] 216 movdqa xmm5, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)] 217 movdqa xmm0, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)] 218 pmullw xmm4, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 219 pmullw xmm5, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 220 pmullw xmm0, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 221 222 pxor xmm1,xmm1 223 pxor xmm2,xmm2 224 punpcklwd xmm1,xmm4 ; xmm1=tmp0L 225 punpckhwd xmm2,xmm4 ; xmm2=tmp0H 226 psrad xmm1,(16-CONST_BITS-1) ; psrad xmm1,16 & pslld xmm1,CONST_BITS+1 227 psrad xmm2,(16-CONST_BITS-1) ; psrad xmm2,16 & pslld xmm2,CONST_BITS+1 228 229 movdqa xmm3,xmm5 ; xmm5=in2=z2 230 punpcklwd xmm5,xmm0 ; xmm0=in6=z3 231 punpckhwd xmm3,xmm0 232 pmaddwd xmm5,[rel PW_F184_MF076] ; xmm5=tmp2L 233 pmaddwd xmm3,[rel PW_F184_MF076] ; xmm3=tmp2H 234 235 movdqa xmm4,xmm1 236 movdqa xmm0,xmm2 237 paddd xmm1,xmm5 ; xmm1=tmp10L 238 paddd xmm2,xmm3 ; xmm2=tmp10H 239 psubd xmm4,xmm5 ; xmm4=tmp12L 240 psubd xmm0,xmm3 ; xmm0=tmp12H 241 242 ; -- Final output stage 243 244 movdqa xmm5,xmm1 245 movdqa xmm3,xmm2 246 paddd xmm1,xmm6 ; xmm1=data0L 247 paddd xmm2,xmm7 ; xmm2=data0H 248 psubd xmm5,xmm6 ; xmm5=data3L 249 psubd xmm3,xmm7 ; xmm3=data3H 250 251 movdqa xmm6,[rel PD_DESCALE_P1_4] ; xmm6=[rel PD_DESCALE_P1_4] 252 253 paddd xmm1,xmm6 254 paddd xmm2,xmm6 255 psrad xmm1,DESCALE_P1_4 256 psrad xmm2,DESCALE_P1_4 257 paddd xmm5,xmm6 258 paddd xmm3,xmm6 259 psrad xmm5,DESCALE_P1_4 260 psrad xmm3,DESCALE_P1_4 261 262 packssdw xmm1,xmm2 ; xmm1=data0=(00 01 02 03 04 05 06 07) 263 packssdw xmm5,xmm3 ; xmm5=data3=(30 31 32 33 34 35 36 37) 264 265 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp0L 266 movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp0H 267 268 movdqa xmm2,xmm4 269 movdqa xmm3,xmm0 270 paddd xmm4,xmm7 ; xmm4=data1L 271 paddd xmm0,xmm6 ; xmm0=data1H 272 psubd xmm2,xmm7 ; xmm2=data2L 273 psubd xmm3,xmm6 ; xmm3=data2H 274 275 movdqa xmm7,[rel PD_DESCALE_P1_4] ; xmm7=[rel PD_DESCALE_P1_4] 276 277 paddd xmm4,xmm7 278 paddd xmm0,xmm7 279 psrad xmm4,DESCALE_P1_4 280 psrad xmm0,DESCALE_P1_4 281 paddd xmm2,xmm7 282 paddd xmm3,xmm7 283 psrad xmm2,DESCALE_P1_4 284 psrad xmm3,DESCALE_P1_4 285 286 packssdw xmm4,xmm0 ; xmm4=data1=(10 11 12 13 14 15 16 17) 287 packssdw xmm2,xmm3 ; xmm2=data2=(20 21 22 23 24 25 26 27) 288 289 movdqa xmm6,xmm1 ; transpose coefficients(phase 1) 290 punpcklwd xmm1,xmm4 ; xmm1=(00 10 01 11 02 12 03 13) 291 punpckhwd xmm6,xmm4 ; xmm6=(04 14 05 15 06 16 07 17) 292 movdqa xmm7,xmm2 ; transpose coefficients(phase 1) 293 punpcklwd xmm2,xmm5 ; xmm2=(20 30 21 31 22 32 23 33) 294 punpckhwd xmm7,xmm5 ; xmm7=(24 34 25 35 26 36 27 37) 295 296 movdqa xmm0,xmm1 ; transpose coefficients(phase 2) 297 punpckldq xmm1,xmm2 ; xmm1=[col0 col1]=(00 10 20 30 01 11 21 31) 298 punpckhdq xmm0,xmm2 ; xmm0=[col2 col3]=(02 12 22 32 03 13 23 33) 299 movdqa xmm3,xmm6 ; transpose coefficients(phase 2) 300 punpckldq xmm6,xmm7 ; xmm6=[col4 col5]=(04 14 24 34 05 15 25 35) 301 punpckhdq xmm3,xmm7 ; xmm3=[col6 col7]=(06 16 26 36 07 17 27 37) 302 .column_end: 303 304 ; -- Prefetch the next coefficient block 305 306 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 307 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 308 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 309 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 310 311 ; ---- Pass 2: process rows, store into output array. 312 313 mov rax, [original_rbp] 314 mov rdi, r12 ; (JSAMPROW *) 315 mov rax, r13 316 317 ; -- Even part 318 319 pxor xmm4,xmm4 320 punpcklwd xmm4,xmm1 ; xmm4=tmp0 321 psrad xmm4,(16-CONST_BITS-1) ; psrad xmm4,16 & pslld xmm4,CONST_BITS+1 322 323 ; -- Odd part 324 325 punpckhwd xmm1,xmm0 326 punpckhwd xmm6,xmm3 327 movdqa xmm5,xmm1 328 movdqa xmm2,xmm6 329 pmaddwd xmm1,[rel PW_F256_F089] ; xmm1=(tmp2) 330 pmaddwd xmm6,[rel PW_MF060_MF050] ; xmm6=(tmp2) 331 pmaddwd xmm5,[rel PW_F106_MF217] ; xmm5=(tmp0) 332 pmaddwd xmm2,[rel PW_F145_MF021] ; xmm2=(tmp0) 333 334 paddd xmm6,xmm1 ; xmm6=tmp2 335 paddd xmm2,xmm5 ; xmm2=tmp0 336 337 ; -- Even part 338 339 punpcklwd xmm0,xmm3 340 pmaddwd xmm0,[rel PW_F184_MF076] ; xmm0=tmp2 341 342 movdqa xmm7,xmm4 343 paddd xmm4,xmm0 ; xmm4=tmp10 344 psubd xmm7,xmm0 ; xmm7=tmp12 345 346 ; -- Final output stage 347 348 movdqa xmm1,[rel PD_DESCALE_P2_4] ; xmm1=[rel PD_DESCALE_P2_4] 349 350 movdqa xmm5,xmm4 351 movdqa xmm3,xmm7 352 paddd xmm4,xmm6 ; xmm4=data0=(00 10 20 30) 353 paddd xmm7,xmm2 ; xmm7=data1=(01 11 21 31) 354 psubd xmm5,xmm6 ; xmm5=data3=(03 13 23 33) 355 psubd xmm3,xmm2 ; xmm3=data2=(02 12 22 32) 356 357 paddd xmm4,xmm1 358 paddd xmm7,xmm1 359 psrad xmm4,DESCALE_P2_4 360 psrad xmm7,DESCALE_P2_4 361 paddd xmm5,xmm1 362 paddd xmm3,xmm1 363 psrad xmm5,DESCALE_P2_4 364 psrad xmm3,DESCALE_P2_4 365 366 packssdw xmm4,xmm3 ; xmm4=(00 10 20 30 02 12 22 32) 367 packssdw xmm7,xmm5 ; xmm7=(01 11 21 31 03 13 23 33) 368 369 movdqa xmm0,xmm4 ; transpose coefficients(phase 1) 370 punpcklwd xmm4,xmm7 ; xmm4=(00 01 10 11 20 21 30 31) 371 punpckhwd xmm0,xmm7 ; xmm0=(02 03 12 13 22 23 32 33) 372 373 movdqa xmm6,xmm4 ; transpose coefficients(phase 2) 374 punpckldq xmm4,xmm0 ; xmm4=(00 01 02 03 10 11 12 13) 375 punpckhdq xmm6,xmm0 ; xmm6=(20 21 22 23 30 31 32 33) 376 377 packsswb xmm4,xmm6 ; xmm4=(00 01 02 03 10 11 12 13 20 ..) 378 paddb xmm4,[rel PB_CENTERJSAMP] 379 380 pshufd xmm2,xmm4,0x39 ; xmm2=(10 11 12 13 20 21 22 23 30 ..) 381 pshufd xmm1,xmm4,0x4E ; xmm1=(20 21 22 23 30 31 32 33 00 ..) 382 pshufd xmm3,xmm4,0x93 ; xmm3=(30 31 32 33 00 01 02 03 10 ..) 383 384 mov rdx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] 385 mov rsi, JSAMPROW [rdi+1*SIZEOF_JSAMPROW] 386 movd XMM_DWORD [rdx+rax*SIZEOF_JSAMPLE], xmm4 387 movd XMM_DWORD [rsi+rax*SIZEOF_JSAMPLE], xmm2 388 mov rdx, JSAMPROW [rdi+2*SIZEOF_JSAMPROW] 389 mov rsi, JSAMPROW [rdi+3*SIZEOF_JSAMPROW] 390 movd XMM_DWORD [rdx+rax*SIZEOF_JSAMPLE], xmm1 391 movd XMM_DWORD [rsi+rax*SIZEOF_JSAMPLE], xmm3 392 393 uncollect_args 394 mov rsp,rbp ; rsp <- aligned rbp 395 pop rsp ; rsp <- original rbp 396 pop rbp 397 ret 398 399 400 ; -------------------------------------------------------------------------- 401 ; 402 ; Perform dequantization and inverse DCT on one block of coefficients, 403 ; producing a reduced-size 2x2 output block. 404 ; 405 ; GLOBAL(void) 406 ; jsimd_idct_2x2_sse2 (void * dct_table, JCOEFPTR coef_block, 407 ; JSAMPARRAY output_buf, JDIMENSION output_col) 408 ; 409 410 ; r10 = void * dct_table 411 ; r11 = JCOEFPTR coef_block 412 ; r12 = JSAMPARRAY output_buf 413 ; r13 = JDIMENSION output_col 414 415 align 16 416 global EXTN(jsimd_idct_2x2_sse2) PRIVATE 417 418 EXTN(jsimd_idct_2x2_sse2): 419 push rbp 420 mov rax,rsp 421 mov rbp,rsp 422 collect_args 423 push rbx 424 425 ; ---- Pass 1: process columns from input. 426 427 mov rdx, r10 ; quantptr 428 mov rsi, r11 ; inptr 429 430 ; | input: | result: | 431 ; | 00 01 ** 03 ** 05 ** 07 | | 432 ; | 10 11 ** 13 ** 15 ** 17 | | 433 ; | ** ** ** ** ** ** ** ** | | 434 ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 | 435 ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 | 436 ; | 50 51 ** 53 ** 55 ** 57 | | 437 ; | ** ** ** ** ** ** ** ** | | 438 ; | 70 71 ** 73 ** 75 ** 77 | | 439 440 ; -- Odd part 441 442 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)] 443 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)] 444 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 445 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 446 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)] 447 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)] 448 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 449 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 450 451 ; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37) 452 ; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77) 453 454 pcmpeqd xmm7,xmm7 455 pslld xmm7,WORD_BIT ; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..} 456 457 movdqa xmm4,xmm0 ; xmm4=(10 11 ** 13 ** 15 ** 17) 458 movdqa xmm5,xmm2 ; xmm5=(50 51 ** 53 ** 55 ** 57) 459 punpcklwd xmm4,xmm1 ; xmm4=(10 30 11 31 ** ** 13 33) 460 punpcklwd xmm5,xmm3 ; xmm5=(50 70 51 71 ** ** 53 73) 461 pmaddwd xmm4,[rel PW_F362_MF127] 462 pmaddwd xmm5,[rel PW_F085_MF072] 463 464 psrld xmm0,WORD_BIT ; xmm0=(11 -- 13 -- 15 -- 17 --) 465 pand xmm1,xmm7 ; xmm1=(-- 31 -- 33 -- 35 -- 37) 466 psrld xmm2,WORD_BIT ; xmm2=(51 -- 53 -- 55 -- 57 --) 467 pand xmm3,xmm7 ; xmm3=(-- 71 -- 73 -- 75 -- 77) 468 por xmm0,xmm1 ; xmm0=(11 31 13 33 15 35 17 37) 469 por xmm2,xmm3 ; xmm2=(51 71 53 73 55 75 57 77) 470 pmaddwd xmm0,[rel PW_F362_MF127] 471 pmaddwd xmm2,[rel PW_F085_MF072] 472 473 paddd xmm4,xmm5 ; xmm4=tmp0[col0 col1 **** col3] 474 paddd xmm0,xmm2 ; xmm0=tmp0[col1 col3 col5 col7] 475 476 ; -- Even part 477 478 movdqa xmm6, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)] 479 pmullw xmm6, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 480 481 ; xmm6=(00 01 ** 03 ** 05 ** 07) 482 483 movdqa xmm1,xmm6 ; xmm1=(00 01 ** 03 ** 05 ** 07) 484 pslld xmm6,WORD_BIT ; xmm6=(-- 00 -- ** -- ** -- **) 485 pand xmm1,xmm7 ; xmm1=(-- 01 -- 03 -- 05 -- 07) 486 psrad xmm6,(WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****] 487 psrad xmm1,(WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7] 488 489 ; -- Final output stage 490 491 movdqa xmm3,xmm6 492 movdqa xmm5,xmm1 493 paddd xmm6,xmm4 ; xmm6=data0[col0 **** **** ****]=(A0 ** ** **) 494 paddd xmm1,xmm0 ; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7) 495 psubd xmm3,xmm4 ; xmm3=data1[col0 **** **** ****]=(B0 ** ** **) 496 psubd xmm5,xmm0 ; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7) 497 498 movdqa xmm2,[rel PD_DESCALE_P1_2] ; xmm2=[rel PD_DESCALE_P1_2] 499 500 punpckldq xmm6,xmm3 ; xmm6=(A0 B0 ** **) 501 502 movdqa xmm7,xmm1 503 punpcklqdq xmm1,xmm5 ; xmm1=(A1 A3 B1 B3) 504 punpckhqdq xmm7,xmm5 ; xmm7=(A5 A7 B5 B7) 505 506 paddd xmm6,xmm2 507 psrad xmm6,DESCALE_P1_2 508 509 paddd xmm1,xmm2 510 paddd xmm7,xmm2 511 psrad xmm1,DESCALE_P1_2 512 psrad xmm7,DESCALE_P1_2 513 514 ; -- Prefetch the next coefficient block 515 516 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 517 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 518 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 519 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 520 521 ; ---- Pass 2: process rows, store into output array. 522 523 mov rdi, r12 ; (JSAMPROW *) 524 mov rax, r13 525 526 ; | input:| result:| 527 ; | A0 B0 | | 528 ; | A1 B1 | C0 C1 | 529 ; | A3 B3 | D0 D1 | 530 ; | A5 B5 | | 531 ; | A7 B7 | | 532 533 ; -- Odd part 534 535 packssdw xmm1,xmm1 ; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3) 536 packssdw xmm7,xmm7 ; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7) 537 pmaddwd xmm1,[rel PW_F362_MF127] 538 pmaddwd xmm7,[rel PW_F085_MF072] 539 540 paddd xmm1,xmm7 ; xmm1=tmp0[row0 row1 row0 row1] 541 542 ; -- Even part 543 544 pslld xmm6,(CONST_BITS+2) ; xmm6=tmp10[row0 row1 **** ****] 545 546 ; -- Final output stage 547 548 movdqa xmm4,xmm6 549 paddd xmm6,xmm1 ; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **) 550 psubd xmm4,xmm1 ; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **) 551 552 punpckldq xmm6,xmm4 ; xmm6=(C0 D0 C1 D1) 553 554 paddd xmm6,[rel PD_DESCALE_P2_2] 555 psrad xmm6,DESCALE_P2_2 556 557 packssdw xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1) 558 packsswb xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..) 559 paddb xmm6,[rel PB_CENTERJSAMP] 560 561 pextrw ebx,xmm6,0x00 ; ebx=(C0 D0 -- --) 562 pextrw ecx,xmm6,0x01 ; ecx=(C1 D1 -- --) 563 564 mov rdx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] 565 mov rsi, JSAMPROW [rdi+1*SIZEOF_JSAMPROW] 566 mov WORD [rdx+rax*SIZEOF_JSAMPLE], bx 567 mov WORD [rsi+rax*SIZEOF_JSAMPLE], cx 568 569 pop rbx 570 uncollect_args 571 pop rbp 572 ret 573 574 ; For some reason, the OS X linker does not honor the request to align the 575 ; segment unless we do this. 576 align 16 577
