1; 2; jfdctflt.asm - floating-point FDCT (SSE) 3; 4; Copyright 2009 Pierre Ossman <ossman@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 a floating-point implementation of the forward DCT 18; (Discrete Cosine Transform). The following code is based directly on 19; the IJG's original jfdctflt.c; see the jfdctflt.c for more details. 20; 21; [TAB8] 22 23%include "jsimdext.inc" 24%include "jdct.inc" 25 26; -------------------------------------------------------------------------- 27 28%macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5) 29 shufps %1,%2,0x44 30%endmacro 31 32%macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7) 33 shufps %1,%2,0xEE 34%endmacro 35 36; -------------------------------------------------------------------------- 37 SECTION SEG_CONST 38 39 alignz 16 40 global EXTN(jconst_fdct_float_sse) 41 42EXTN(jconst_fdct_float_sse): 43 44PD_0_382 times 4 dd 0.382683432365089771728460 45PD_0_707 times 4 dd 0.707106781186547524400844 46PD_0_541 times 4 dd 0.541196100146196984399723 47PD_1_306 times 4 dd 1.306562964876376527856643 48 49 alignz 16 50 51; -------------------------------------------------------------------------- 52 SECTION SEG_TEXT 53 BITS 32 54; 55; Perform the forward DCT on one block of samples. 56; 57; GLOBAL(void) 58; jsimd_fdct_float_sse (FAST_FLOAT * data) 59; 60 61%define data(b) (b)+8 ; FAST_FLOAT * data 62 63%define original_ebp ebp+0 64%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] 65%define WK_NUM 2 66 67 align 16 68 global EXTN(jsimd_fdct_float_sse) 69 70EXTN(jsimd_fdct_float_sse): 71 push ebp 72 mov eax,esp ; eax = original ebp 73 sub esp, byte 4 74 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits 75 mov [esp],eax 76 mov ebp,esp ; ebp = aligned ebp 77 lea esp, [wk(0)] 78 pushpic ebx 79; push ecx ; need not be preserved 80; push edx ; need not be preserved 81; push esi ; unused 82; push edi ; unused 83 84 get_GOT ebx ; get GOT address 85 86 ; ---- Pass 1: process rows. 87 88 mov edx, POINTER [data(eax)] ; (FAST_FLOAT *) 89 mov ecx, DCTSIZE/4 90 alignx 16,7 91.rowloop: 92 93 movaps xmm0, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)] 94 movaps xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)] 95 movaps xmm2, XMMWORD [XMMBLOCK(2,1,edx,SIZEOF_FAST_FLOAT)] 96 movaps xmm3, XMMWORD [XMMBLOCK(3,1,edx,SIZEOF_FAST_FLOAT)] 97 98 ; xmm0=(20 21 22 23), xmm2=(24 25 26 27) 99 ; xmm1=(30 31 32 33), xmm3=(34 35 36 37) 100 101 movaps xmm4,xmm0 ; transpose coefficients(phase 1) 102 unpcklps xmm0,xmm1 ; xmm0=(20 30 21 31) 103 unpckhps xmm4,xmm1 ; xmm4=(22 32 23 33) 104 movaps xmm5,xmm2 ; transpose coefficients(phase 1) 105 unpcklps xmm2,xmm3 ; xmm2=(24 34 25 35) 106 unpckhps xmm5,xmm3 ; xmm5=(26 36 27 37) 107 108 movaps xmm6, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)] 109 movaps xmm7, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)] 110 movaps xmm1, XMMWORD [XMMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)] 111 movaps xmm3, XMMWORD [XMMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)] 112 113 ; xmm6=(00 01 02 03), xmm1=(04 05 06 07) 114 ; xmm7=(10 11 12 13), xmm3=(14 15 16 17) 115 116 movaps XMMWORD [wk(0)], xmm4 ; wk(0)=(22 32 23 33) 117 movaps XMMWORD [wk(1)], xmm2 ; wk(1)=(24 34 25 35) 118 119 movaps xmm4,xmm6 ; transpose coefficients(phase 1) 120 unpcklps xmm6,xmm7 ; xmm6=(00 10 01 11) 121 unpckhps xmm4,xmm7 ; xmm4=(02 12 03 13) 122 movaps xmm2,xmm1 ; transpose coefficients(phase 1) 123 unpcklps xmm1,xmm3 ; xmm1=(04 14 05 15) 124 unpckhps xmm2,xmm3 ; xmm2=(06 16 07 17) 125 126 movaps xmm7,xmm6 ; transpose coefficients(phase 2) 127 unpcklps2 xmm6,xmm0 ; xmm6=(00 10 20 30)=data0 128 unpckhps2 xmm7,xmm0 ; xmm7=(01 11 21 31)=data1 129 movaps xmm3,xmm2 ; transpose coefficients(phase 2) 130 unpcklps2 xmm2,xmm5 ; xmm2=(06 16 26 36)=data6 131 unpckhps2 xmm3,xmm5 ; xmm3=(07 17 27 37)=data7 132 133 movaps xmm0,xmm7 134 movaps xmm5,xmm6 135 subps xmm7,xmm2 ; xmm7=data1-data6=tmp6 136 subps xmm6,xmm3 ; xmm6=data0-data7=tmp7 137 addps xmm0,xmm2 ; xmm0=data1+data6=tmp1 138 addps xmm5,xmm3 ; xmm5=data0+data7=tmp0 139 140 movaps xmm2, XMMWORD [wk(0)] ; xmm2=(22 32 23 33) 141 movaps xmm3, XMMWORD [wk(1)] ; xmm3=(24 34 25 35) 142 movaps XMMWORD [wk(0)], xmm7 ; wk(0)=tmp6 143 movaps XMMWORD [wk(1)], xmm6 ; wk(1)=tmp7 144 145 movaps xmm7,xmm4 ; transpose coefficients(phase 2) 146 unpcklps2 xmm4,xmm2 ; xmm4=(02 12 22 32)=data2 147 unpckhps2 xmm7,xmm2 ; xmm7=(03 13 23 33)=data3 148 movaps xmm6,xmm1 ; transpose coefficients(phase 2) 149 unpcklps2 xmm1,xmm3 ; xmm1=(04 14 24 34)=data4 150 unpckhps2 xmm6,xmm3 ; xmm6=(05 15 25 35)=data5 151 152 movaps xmm2,xmm7 153 movaps xmm3,xmm4 154 addps xmm7,xmm1 ; xmm7=data3+data4=tmp3 155 addps xmm4,xmm6 ; xmm4=data2+data5=tmp2 156 subps xmm2,xmm1 ; xmm2=data3-data4=tmp4 157 subps xmm3,xmm6 ; xmm3=data2-data5=tmp5 158 159 ; -- Even part 160 161 movaps xmm1,xmm5 162 movaps xmm6,xmm0 163 subps xmm5,xmm7 ; xmm5=tmp13 164 subps xmm0,xmm4 ; xmm0=tmp12 165 addps xmm1,xmm7 ; xmm1=tmp10 166 addps xmm6,xmm4 ; xmm6=tmp11 167 168 addps xmm0,xmm5 169 mulps xmm0,[GOTOFF(ebx,PD_0_707)] ; xmm0=z1 170 171 movaps xmm7,xmm1 172 movaps xmm4,xmm5 173 subps xmm1,xmm6 ; xmm1=data4 174 subps xmm5,xmm0 ; xmm5=data6 175 addps xmm7,xmm6 ; xmm7=data0 176 addps xmm4,xmm0 ; xmm4=data2 177 178 movaps XMMWORD [XMMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)], xmm1 179 movaps XMMWORD [XMMBLOCK(2,1,edx,SIZEOF_FAST_FLOAT)], xmm5 180 movaps XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], xmm7 181 movaps XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)], xmm4 182 183 ; -- Odd part 184 185 movaps xmm6, XMMWORD [wk(0)] ; xmm6=tmp6 186 movaps xmm0, XMMWORD [wk(1)] ; xmm0=tmp7 187 188 addps xmm2,xmm3 ; xmm2=tmp10 189 addps xmm3,xmm6 ; xmm3=tmp11 190 addps xmm6,xmm0 ; xmm6=tmp12, xmm0=tmp7 191 192 mulps xmm3,[GOTOFF(ebx,PD_0_707)] ; xmm3=z3 193 194 movaps xmm1,xmm2 ; xmm1=tmp10 195 subps xmm2,xmm6 196 mulps xmm2,[GOTOFF(ebx,PD_0_382)] ; xmm2=z5 197 mulps xmm1,[GOTOFF(ebx,PD_0_541)] ; xmm1=MULTIPLY(tmp10,FIX_0_541196) 198 mulps xmm6,[GOTOFF(ebx,PD_1_306)] ; xmm6=MULTIPLY(tmp12,FIX_1_306562) 199 addps xmm1,xmm2 ; xmm1=z2 200 addps xmm6,xmm2 ; xmm6=z4 201 202 movaps xmm5,xmm0 203 subps xmm0,xmm3 ; xmm0=z13 204 addps xmm5,xmm3 ; xmm5=z11 205 206 movaps xmm7,xmm0 207 movaps xmm4,xmm5 208 subps xmm0,xmm1 ; xmm0=data3 209 subps xmm5,xmm6 ; xmm5=data7 210 addps xmm7,xmm1 ; xmm7=data5 211 addps xmm4,xmm6 ; xmm4=data1 212 213 movaps XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)], xmm0 214 movaps XMMWORD [XMMBLOCK(3,1,edx,SIZEOF_FAST_FLOAT)], xmm5 215 movaps XMMWORD [XMMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)], xmm7 216 movaps XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], xmm4 217 218 add edx, 4*DCTSIZE*SIZEOF_FAST_FLOAT 219 dec ecx 220 jnz near .rowloop 221 222 ; ---- Pass 2: process columns. 223 224 mov edx, POINTER [data(eax)] ; (FAST_FLOAT *) 225 mov ecx, DCTSIZE/4 226 alignx 16,7 227.columnloop: 228 229 movaps xmm0, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)] 230 movaps xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)] 231 movaps xmm2, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)] 232 movaps xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)] 233 234 ; xmm0=(02 12 22 32), xmm2=(42 52 62 72) 235 ; xmm1=(03 13 23 33), xmm3=(43 53 63 73) 236 237 movaps xmm4,xmm0 ; transpose coefficients(phase 1) 238 unpcklps xmm0,xmm1 ; xmm0=(02 03 12 13) 239 unpckhps xmm4,xmm1 ; xmm4=(22 23 32 33) 240 movaps xmm5,xmm2 ; transpose coefficients(phase 1) 241 unpcklps xmm2,xmm3 ; xmm2=(42 43 52 53) 242 unpckhps xmm5,xmm3 ; xmm5=(62 63 72 73) 243 244 movaps xmm6, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)] 245 movaps xmm7, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)] 246 movaps xmm1, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)] 247 movaps xmm3, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)] 248 249 ; xmm6=(00 10 20 30), xmm1=(40 50 60 70) 250 ; xmm7=(01 11 21 31), xmm3=(41 51 61 71) 251 252 movaps XMMWORD [wk(0)], xmm4 ; wk(0)=(22 23 32 33) 253 movaps XMMWORD [wk(1)], xmm2 ; wk(1)=(42 43 52 53) 254 255 movaps xmm4,xmm6 ; transpose coefficients(phase 1) 256 unpcklps xmm6,xmm7 ; xmm6=(00 01 10 11) 257 unpckhps xmm4,xmm7 ; xmm4=(20 21 30 31) 258 movaps xmm2,xmm1 ; transpose coefficients(phase 1) 259 unpcklps xmm1,xmm3 ; xmm1=(40 41 50 51) 260 unpckhps xmm2,xmm3 ; xmm2=(60 61 70 71) 261 262 movaps xmm7,xmm6 ; transpose coefficients(phase 2) 263 unpcklps2 xmm6,xmm0 ; xmm6=(00 01 02 03)=data0 264 unpckhps2 xmm7,xmm0 ; xmm7=(10 11 12 13)=data1 265 movaps xmm3,xmm2 ; transpose coefficients(phase 2) 266 unpcklps2 xmm2,xmm5 ; xmm2=(60 61 62 63)=data6 267 unpckhps2 xmm3,xmm5 ; xmm3=(70 71 72 73)=data7 268 269 movaps xmm0,xmm7 270 movaps xmm5,xmm6 271 subps xmm7,xmm2 ; xmm7=data1-data6=tmp6 272 subps xmm6,xmm3 ; xmm6=data0-data7=tmp7 273 addps xmm0,xmm2 ; xmm0=data1+data6=tmp1 274 addps xmm5,xmm3 ; xmm5=data0+data7=tmp0 275 276 movaps xmm2, XMMWORD [wk(0)] ; xmm2=(22 23 32 33) 277 movaps xmm3, XMMWORD [wk(1)] ; xmm3=(42 43 52 53) 278 movaps XMMWORD [wk(0)], xmm7 ; wk(0)=tmp6 279 movaps XMMWORD [wk(1)], xmm6 ; wk(1)=tmp7 280 281 movaps xmm7,xmm4 ; transpose coefficients(phase 2) 282 unpcklps2 xmm4,xmm2 ; xmm4=(20 21 22 23)=data2 283 unpckhps2 xmm7,xmm2 ; xmm7=(30 31 32 33)=data3 284 movaps xmm6,xmm1 ; transpose coefficients(phase 2) 285 unpcklps2 xmm1,xmm3 ; xmm1=(40 41 42 43)=data4 286 unpckhps2 xmm6,xmm3 ; xmm6=(50 51 52 53)=data5 287 288 movaps xmm2,xmm7 289 movaps xmm3,xmm4 290 addps xmm7,xmm1 ; xmm7=data3+data4=tmp3 291 addps xmm4,xmm6 ; xmm4=data2+data5=tmp2 292 subps xmm2,xmm1 ; xmm2=data3-data4=tmp4 293 subps xmm3,xmm6 ; xmm3=data2-data5=tmp5 294 295 ; -- Even part 296 297 movaps xmm1,xmm5 298 movaps xmm6,xmm0 299 subps xmm5,xmm7 ; xmm5=tmp13 300 subps xmm0,xmm4 ; xmm0=tmp12 301 addps xmm1,xmm7 ; xmm1=tmp10 302 addps xmm6,xmm4 ; xmm6=tmp11 303 304 addps xmm0,xmm5 305 mulps xmm0,[GOTOFF(ebx,PD_0_707)] ; xmm0=z1 306 307 movaps xmm7,xmm1 308 movaps xmm4,xmm5 309 subps xmm1,xmm6 ; xmm1=data4 310 subps xmm5,xmm0 ; xmm5=data6 311 addps xmm7,xmm6 ; xmm7=data0 312 addps xmm4,xmm0 ; xmm4=data2 313 314 movaps XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)], xmm1 315 movaps XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)], xmm5 316 movaps XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], xmm7 317 movaps XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)], xmm4 318 319 ; -- Odd part 320 321 movaps xmm6, XMMWORD [wk(0)] ; xmm6=tmp6 322 movaps xmm0, XMMWORD [wk(1)] ; xmm0=tmp7 323 324 addps xmm2,xmm3 ; xmm2=tmp10 325 addps xmm3,xmm6 ; xmm3=tmp11 326 addps xmm6,xmm0 ; xmm6=tmp12, xmm0=tmp7 327 328 mulps xmm3,[GOTOFF(ebx,PD_0_707)] ; xmm3=z3 329 330 movaps xmm1,xmm2 ; xmm1=tmp10 331 subps xmm2,xmm6 332 mulps xmm2,[GOTOFF(ebx,PD_0_382)] ; xmm2=z5 333 mulps xmm1,[GOTOFF(ebx,PD_0_541)] ; xmm1=MULTIPLY(tmp10,FIX_0_541196) 334 mulps xmm6,[GOTOFF(ebx,PD_1_306)] ; xmm6=MULTIPLY(tmp12,FIX_1_306562) 335 addps xmm1,xmm2 ; xmm1=z2 336 addps xmm6,xmm2 ; xmm6=z4 337 338 movaps xmm5,xmm0 339 subps xmm0,xmm3 ; xmm0=z13 340 addps xmm5,xmm3 ; xmm5=z11 341 342 movaps xmm7,xmm0 343 movaps xmm4,xmm5 344 subps xmm0,xmm1 ; xmm0=data3 345 subps xmm5,xmm6 ; xmm5=data7 346 addps xmm7,xmm1 ; xmm7=data5 347 addps xmm4,xmm6 ; xmm4=data1 348 349 movaps XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)], xmm0 350 movaps XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)], xmm5 351 movaps XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)], xmm7 352 movaps XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], xmm4 353 354 add edx, byte 4*SIZEOF_FAST_FLOAT 355 dec ecx 356 jnz near .columnloop 357 358; pop edi ; unused 359; pop esi ; unused 360; pop edx ; need not be preserved 361; pop ecx ; need not be preserved 362 poppic ebx 363 mov esp,ebp ; esp <- aligned ebp 364 pop esp ; esp <- original ebp 365 pop ebp 366 ret 367 368; For some reason, the OS X linker does not honor the request to align the 369; segment unless we do this. 370 align 16 371