1; 2; jidctred.asm - reduced-size IDCT (64-bit SSE2) 3; 4; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB 5; Copyright (C) 2009, 2016, 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 38F_0_211 equ 1730 ; FIX(0.211164243) 39F_0_509 equ 4176 ; FIX(0.509795579) 40F_0_601 equ 4926 ; FIX(0.601344887) 41F_0_720 equ 5906 ; FIX(0.720959822) 42F_0_765 equ 6270 ; FIX(0.765366865) 43F_0_850 equ 6967 ; FIX(0.850430095) 44F_0_899 equ 7373 ; FIX(0.899976223) 45F_1_061 equ 8697 ; FIX(1.061594337) 46F_1_272 equ 10426 ; FIX(1.272758580) 47F_1_451 equ 11893 ; FIX(1.451774981) 48F_1_847 equ 15137 ; FIX(1.847759065) 49F_2_172 equ 17799 ; FIX(2.172734803) 50F_2_562 equ 20995 ; FIX(2.562915447) 51F_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)) 55F_0_211 equ DESCALE( 226735879, 30 - CONST_BITS) ; FIX(0.211164243) 56F_0_509 equ DESCALE( 547388834, 30 - CONST_BITS) ; FIX(0.509795579) 57F_0_601 equ DESCALE( 645689155, 30 - CONST_BITS) ; FIX(0.601344887) 58F_0_720 equ DESCALE( 774124714, 30 - CONST_BITS) ; FIX(0.720959822) 59F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865) 60F_0_850 equ DESCALE( 913142361, 30 - CONST_BITS) ; FIX(0.850430095) 61F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223) 62F_1_061 equ DESCALE(1139878239, 30 - CONST_BITS) ; FIX(1.061594337) 63F_1_272 equ DESCALE(1366614119, 30 - CONST_BITS) ; FIX(1.272758580) 64F_1_451 equ DESCALE(1558831516, 30 - CONST_BITS) ; FIX(1.451774981) 65F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065) 66F_2_172 equ DESCALE(2332956230, 30 - CONST_BITS) ; FIX(2.172734803) 67F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447) 68F_3_624 equ DESCALE(3891787747, 30 - CONST_BITS) ; FIX(3.624509785) 69%endif 70 71; -------------------------------------------------------------------------- 72 SECTION SEG_CONST 73 74 alignz 32 75 GLOBAL_DATA(jconst_idct_red_sse2) 76 77EXTN(jconst_idct_red_sse2): 78 79PW_F184_MF076 times 4 dw F_1_847, -F_0_765 80PW_F256_F089 times 4 dw F_2_562, F_0_899 81PW_F106_MF217 times 4 dw F_1_061, -F_2_172 82PW_MF060_MF050 times 4 dw -F_0_601, -F_0_509 83PW_F145_MF021 times 4 dw F_1_451, -F_0_211 84PW_F362_MF127 times 4 dw F_3_624, -F_1_272 85PW_F085_MF072 times 4 dw F_0_850, -F_0_720 86PD_DESCALE_P1_4 times 4 dd 1 << (DESCALE_P1_4 - 1) 87PD_DESCALE_P2_4 times 4 dd 1 << (DESCALE_P2_4 - 1) 88PD_DESCALE_P1_2 times 4 dd 1 << (DESCALE_P1_2 - 1) 89PD_DESCALE_P2_2 times 4 dd 1 << (DESCALE_P2_2 - 1) 90PB_CENTERJSAMP times 16 db CENTERJSAMPLE 91 92 alignz 32 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; r13d = JDIMENSION output_col 110 111%define original_rbp rbp + 0 112%define wk(i) rbp - (WK_NUM - (i)) * SIZEOF_XMMWORD 113 ; xmmword wk[WK_NUM] 114%define WK_NUM 2 115 116 align 32 117 GLOBAL_FUNCTION(jsimd_idct_4x4_sse2) 118 119EXTN(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 4 128 129 ; ---- 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 eax, r13d 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 4 394 mov rsp, rbp ; rsp <- aligned rbp 395 pop rsp ; rsp <- original rbp 396 pop rbp 397 ret 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; r13d = JDIMENSION output_col 413 414 align 32 415 GLOBAL_FUNCTION(jsimd_idct_2x2_sse2) 416 417EXTN(jsimd_idct_2x2_sse2): 418 push rbp 419 mov rax, rsp 420 mov rbp, rsp 421 collect_args 4 422 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 4 570 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 32 576