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; Copyright (C) 2018, Matthias Räncker. 7; 8; Based on the 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%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 37F_0_211 equ 1730 ; FIX(0.211164243) 38F_0_509 equ 4176 ; FIX(0.509795579) 39F_0_601 equ 4926 ; FIX(0.601344887) 40F_0_720 equ 5906 ; FIX(0.720959822) 41F_0_765 equ 6270 ; FIX(0.765366865) 42F_0_850 equ 6967 ; FIX(0.850430095) 43F_0_899 equ 7373 ; FIX(0.899976223) 44F_1_061 equ 8697 ; FIX(1.061594337) 45F_1_272 equ 10426 ; FIX(1.272758580) 46F_1_451 equ 11893 ; FIX(1.451774981) 47F_1_847 equ 15137 ; FIX(1.847759065) 48F_2_172 equ 17799 ; FIX(2.172734803) 49F_2_562 equ 20995 ; FIX(2.562915447) 50F_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)) 54F_0_211 equ DESCALE( 226735879, 30 - CONST_BITS) ; FIX(0.211164243) 55F_0_509 equ DESCALE( 547388834, 30 - CONST_BITS) ; FIX(0.509795579) 56F_0_601 equ DESCALE( 645689155, 30 - CONST_BITS) ; FIX(0.601344887) 57F_0_720 equ DESCALE( 774124714, 30 - CONST_BITS) ; FIX(0.720959822) 58F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865) 59F_0_850 equ DESCALE( 913142361, 30 - CONST_BITS) ; FIX(0.850430095) 60F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223) 61F_1_061 equ DESCALE(1139878239, 30 - CONST_BITS) ; FIX(1.061594337) 62F_1_272 equ DESCALE(1366614119, 30 - CONST_BITS) ; FIX(1.272758580) 63F_1_451 equ DESCALE(1558831516, 30 - CONST_BITS) ; FIX(1.451774981) 64F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065) 65F_2_172 equ DESCALE(2332956230, 30 - CONST_BITS) ; FIX(2.172734803) 66F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447) 67F_3_624 equ DESCALE(3891787747, 30 - CONST_BITS) ; FIX(3.624509785) 68%endif 69 70; -------------------------------------------------------------------------- 71 SECTION SEG_CONST 72 73 alignz 32 74 GLOBAL_DATA(jconst_idct_red_sse2) 75 76EXTN(jconst_idct_red_sse2): 77 78PW_F184_MF076 times 4 dw F_1_847, -F_0_765 79PW_F256_F089 times 4 dw F_2_562, F_0_899 80PW_F106_MF217 times 4 dw F_1_061, -F_2_172 81PW_MF060_MF050 times 4 dw -F_0_601, -F_0_509 82PW_F145_MF021 times 4 dw F_1_451, -F_0_211 83PW_F362_MF127 times 4 dw F_3_624, -F_1_272 84PW_F085_MF072 times 4 dw F_0_850, -F_0_720 85PD_DESCALE_P1_4 times 4 dd 1 << (DESCALE_P1_4 - 1) 86PD_DESCALE_P2_4 times 4 dd 1 << (DESCALE_P2_4 - 1) 87PD_DESCALE_P1_2 times 4 dd 1 << (DESCALE_P1_2 - 1) 88PD_DESCALE_P2_2 times 4 dd 1 << (DESCALE_P2_2 - 1) 89PB_CENTERJSAMP times 16 db CENTERJSAMPLE 90 91 alignz 32 92 93; -------------------------------------------------------------------------- 94 SECTION SEG_TEXT 95 BITS 64 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; r10 = void *dct_table 106; r11 = JCOEFPTR coef_block 107; r12 = JSAMPARRAY output_buf 108; r13d = JDIMENSION output_col 109 110%define original_rbp rbp + 0 111%define wk(i) rbp - (WK_NUM - (i)) * SIZEOF_XMMWORD 112 ; xmmword wk[WK_NUM] 113%define WK_NUM 2 114 115 align 32 116 GLOBAL_FUNCTION(jsimd_idct_4x4_sse2) 117 118EXTN(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 4 127 128 ; ---- 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 rdxp, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] 384 mov rsip, 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 rdxp, JSAMPROW [rdi+2*SIZEOF_JSAMPROW] 388 mov rsip, 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 4 393 mov rsp, rbp ; rsp <- aligned rbp 394 pop rsp ; rsp <- original rbp 395 pop rbp 396 ret 397 398; -------------------------------------------------------------------------- 399; 400; Perform dequantization and inverse DCT on one block of coefficients, 401; producing a reduced-size 2x2 output block. 402; 403; GLOBAL(void) 404; jsimd_idct_2x2_sse2(void *dct_table, JCOEFPTR coef_block, 405; JSAMPARRAY output_buf, JDIMENSION output_col) 406; 407 408; r10 = void *dct_table 409; r11 = JCOEFPTR coef_block 410; r12 = JSAMPARRAY output_buf 411; r13d = JDIMENSION output_col 412 413 align 32 414 GLOBAL_FUNCTION(jsimd_idct_2x2_sse2) 415 416EXTN(jsimd_idct_2x2_sse2): 417 push rbp 418 mov rax, rsp 419 mov rbp, rsp 420 collect_args 4 421 push rbx 422 423 ; ---- Pass 1: process columns from input. 424 425 mov rdx, r10 ; quantptr 426 mov rsi, r11 ; inptr 427 428 ; | input: | result: | 429 ; | 00 01 ** 03 ** 05 ** 07 | | 430 ; | 10 11 ** 13 ** 15 ** 17 | | 431 ; | ** ** ** ** ** ** ** ** | | 432 ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 | 433 ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 | 434 ; | 50 51 ** 53 ** 55 ** 57 | | 435 ; | ** ** ** ** ** ** ** ** | | 436 ; | 70 71 ** 73 ** 75 ** 77 | | 437 438 ; -- Odd part 439 440 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)] 441 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)] 442 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 443 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 444 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)] 445 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)] 446 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 447 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 448 449 ; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37) 450 ; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77) 451 452 pcmpeqd xmm7, xmm7 453 pslld xmm7, WORD_BIT ; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..} 454 455 movdqa xmm4, xmm0 ; xmm4=(10 11 ** 13 ** 15 ** 17) 456 movdqa xmm5, xmm2 ; xmm5=(50 51 ** 53 ** 55 ** 57) 457 punpcklwd xmm4, xmm1 ; xmm4=(10 30 11 31 ** ** 13 33) 458 punpcklwd xmm5, xmm3 ; xmm5=(50 70 51 71 ** ** 53 73) 459 pmaddwd xmm4, [rel PW_F362_MF127] 460 pmaddwd xmm5, [rel PW_F085_MF072] 461 462 psrld xmm0, WORD_BIT ; xmm0=(11 -- 13 -- 15 -- 17 --) 463 pand xmm1, xmm7 ; xmm1=(-- 31 -- 33 -- 35 -- 37) 464 psrld xmm2, WORD_BIT ; xmm2=(51 -- 53 -- 55 -- 57 --) 465 pand xmm3, xmm7 ; xmm3=(-- 71 -- 73 -- 75 -- 77) 466 por xmm0, xmm1 ; xmm0=(11 31 13 33 15 35 17 37) 467 por xmm2, xmm3 ; xmm2=(51 71 53 73 55 75 57 77) 468 pmaddwd xmm0, [rel PW_F362_MF127] 469 pmaddwd xmm2, [rel PW_F085_MF072] 470 471 paddd xmm4, xmm5 ; xmm4=tmp0[col0 col1 **** col3] 472 paddd xmm0, xmm2 ; xmm0=tmp0[col1 col3 col5 col7] 473 474 ; -- Even part 475 476 movdqa xmm6, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)] 477 pmullw xmm6, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)] 478 479 ; xmm6=(00 01 ** 03 ** 05 ** 07) 480 481 movdqa xmm1, xmm6 ; xmm1=(00 01 ** 03 ** 05 ** 07) 482 pslld xmm6, WORD_BIT ; xmm6=(-- 00 -- ** -- ** -- **) 483 pand xmm1, xmm7 ; xmm1=(-- 01 -- 03 -- 05 -- 07) 484 psrad xmm6, (WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****] 485 psrad xmm1, (WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7] 486 487 ; -- Final output stage 488 489 movdqa xmm3, xmm6 490 movdqa xmm5, xmm1 491 paddd xmm6, xmm4 ; xmm6=data0[col0 **** **** ****]=(A0 ** ** **) 492 paddd xmm1, xmm0 ; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7) 493 psubd xmm3, xmm4 ; xmm3=data1[col0 **** **** ****]=(B0 ** ** **) 494 psubd xmm5, xmm0 ; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7) 495 496 movdqa xmm2, [rel PD_DESCALE_P1_2] ; xmm2=[rel PD_DESCALE_P1_2] 497 498 punpckldq xmm6, xmm3 ; xmm6=(A0 B0 ** **) 499 500 movdqa xmm7, xmm1 501 punpcklqdq xmm1, xmm5 ; xmm1=(A1 A3 B1 B3) 502 punpckhqdq xmm7, xmm5 ; xmm7=(A5 A7 B5 B7) 503 504 paddd xmm6, xmm2 505 psrad xmm6, DESCALE_P1_2 506 507 paddd xmm1, xmm2 508 paddd xmm7, xmm2 509 psrad xmm1, DESCALE_P1_2 510 psrad xmm7, DESCALE_P1_2 511 512 ; -- Prefetch the next coefficient block 513 514 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 0*32] 515 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 1*32] 516 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 2*32] 517 prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 3*32] 518 519 ; ---- Pass 2: process rows, store into output array. 520 521 mov rdi, r12 ; (JSAMPROW *) 522 mov eax, r13d 523 524 ; | input:| result:| 525 ; | A0 B0 | | 526 ; | A1 B1 | C0 C1 | 527 ; | A3 B3 | D0 D1 | 528 ; | A5 B5 | | 529 ; | A7 B7 | | 530 531 ; -- Odd part 532 533 packssdw xmm1, xmm1 ; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3) 534 packssdw xmm7, xmm7 ; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7) 535 pmaddwd xmm1, [rel PW_F362_MF127] 536 pmaddwd xmm7, [rel PW_F085_MF072] 537 538 paddd xmm1, xmm7 ; xmm1=tmp0[row0 row1 row0 row1] 539 540 ; -- Even part 541 542 pslld xmm6, (CONST_BITS+2) ; xmm6=tmp10[row0 row1 **** ****] 543 544 ; -- Final output stage 545 546 movdqa xmm4, xmm6 547 paddd xmm6, xmm1 ; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **) 548 psubd xmm4, xmm1 ; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **) 549 550 punpckldq xmm6, xmm4 ; xmm6=(C0 D0 C1 D1) 551 552 paddd xmm6, [rel PD_DESCALE_P2_2] 553 psrad xmm6, DESCALE_P2_2 554 555 packssdw xmm6, xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1) 556 packsswb xmm6, xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..) 557 paddb xmm6, [rel PB_CENTERJSAMP] 558 559 pextrw ebx, xmm6, 0x00 ; ebx=(C0 D0 -- --) 560 pextrw ecx, xmm6, 0x01 ; ecx=(C1 D1 -- --) 561 562 mov rdxp, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] 563 mov rsip, JSAMPROW [rdi+1*SIZEOF_JSAMPROW] 564 mov word [rdx+rax*SIZEOF_JSAMPLE], bx 565 mov word [rsi+rax*SIZEOF_JSAMPLE], cx 566 567 pop rbx 568 uncollect_args 4 569 pop rbp 570 ret 571 572; For some reason, the OS X linker does not honor the request to align the 573; segment unless we do this. 574 align 32 575