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media/libjpeg/simd/ji3dnflt.asm@b8a032363ba2 (annotated)

media/libjpeg/simd/ji3dnflt.asm

Thu, 22 Jan 2015 13:21:57 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 22 Jan 2015 13:21:57 +0100
branch
TOR_BUG_9701
changeset 15
b8a032363ba2
permissions
-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0 1 ;
michael@0 2 ; ji3dnflt.asm - floating-point IDCT (3DNow! & MMX)
michael@0 3 ;
michael@0 4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
michael@0 5 ;
michael@0 6 ; Based on
michael@0 7 ; x86 SIMD extension for IJG JPEG library
michael@0 8 ; Copyright (C) 1999-2006, MIYASAKA Masaru.
michael@0 9 ; For conditions of distribution and use, see copyright notice in jsimdext.inc
michael@0 10 ;
michael@0 11 ; This file should be assembled with NASM (Netwide Assembler),
michael@0 12 ; can *not* be assembled with Microsoft's MASM or any compatible
michael@0 13 ; assembler (including Borland's Turbo Assembler).
michael@0 14 ; NASM is available from http://nasm.sourceforge.net/ or
michael@0 15 ; http://sourceforge.net/project/showfiles.php?group_id=6208
michael@0 16 ;
michael@0 17 ; This file contains a floating-point implementation of the inverse DCT
michael@0 18 ; (Discrete Cosine Transform). The following code is based directly on
michael@0 19 ; the IJG's original jidctflt.c; see the jidctflt.c for more details.
michael@0 20 ;
michael@0 21 ; [TAB8]
michael@0 22
michael@0 23 %include "jsimdext.inc"
michael@0 24 %include "jdct.inc"
michael@0 25
michael@0 26 ; --------------------------------------------------------------------------
michael@0 27 SECTION SEG_CONST
michael@0 28
michael@0 29 alignz 16
michael@0 30 global EXTN(jconst_idct_float_3dnow)
michael@0 31
michael@0 32 EXTN(jconst_idct_float_3dnow):
michael@0 33
michael@0 34 PD_1_414 times 2 dd 1.414213562373095048801689
michael@0 35 PD_1_847 times 2 dd 1.847759065022573512256366
michael@0 36 PD_1_082 times 2 dd 1.082392200292393968799446
michael@0 37 PD_2_613 times 2 dd 2.613125929752753055713286
michael@0 38 PD_RNDINT_MAGIC times 2 dd 100663296.0 ; (float)(0x00C00000 << 3)
michael@0 39 PB_CENTERJSAMP times 8 db CENTERJSAMPLE
michael@0 40
michael@0 41 alignz 16
michael@0 42
michael@0 43 ; --------------------------------------------------------------------------
michael@0 44 SECTION SEG_TEXT
michael@0 45 BITS 32
michael@0 46 ;
michael@0 47 ; Perform dequantization and inverse DCT on one block of coefficients.
michael@0 48 ;
michael@0 49 ; GLOBAL(void)
michael@0 50 ; jsimd_idct_float_3dnow (void * dct_table, JCOEFPTR coef_block,
michael@0 51 ; JSAMPARRAY output_buf, JDIMENSION output_col)
michael@0 52 ;
michael@0 53
michael@0 54 %define dct_table(b) (b)+8 ; void * dct_table
michael@0 55 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block
michael@0 56 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
michael@0 57 %define output_col(b) (b)+20 ; JDIMENSION output_col
michael@0 58
michael@0 59 %define original_ebp ebp+0
michael@0 60 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
michael@0 61 %define WK_NUM 2
michael@0 62 %define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT
michael@0 63 ; FAST_FLOAT workspace[DCTSIZE2]
michael@0 64
michael@0 65 align 16
michael@0 66 global EXTN(jsimd_idct_float_3dnow)
michael@0 67
michael@0 68 EXTN(jsimd_idct_float_3dnow):
michael@0 69 push ebp
michael@0 70 mov eax,esp ; eax = original ebp
michael@0 71 sub esp, byte 4
michael@0 72 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
michael@0 73 mov [esp],eax
michael@0 74 mov ebp,esp ; ebp = aligned ebp
michael@0 75 lea esp, [workspace]
michael@0 76 push ebx
michael@0 77 ; push ecx ; need not be preserved
michael@0 78 ; push edx ; need not be preserved
michael@0 79 push esi
michael@0 80 push edi
michael@0 81
michael@0 82 get_GOT ebx ; get GOT address
michael@0 83
michael@0 84 ; ---- Pass 1: process columns from input, store into work array.
michael@0 85
michael@0 86 ; mov eax, [original_ebp]
michael@0 87 mov edx, POINTER [dct_table(eax)] ; quantptr
michael@0 88 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
michael@0 89 lea edi, [workspace] ; FAST_FLOAT * wsptr
michael@0 90 mov ecx, DCTSIZE/2 ; ctr
michael@0 91 alignx 16,7
michael@0 92 .columnloop:
michael@0 93 %ifndef NO_ZERO_COLUMN_TEST_FLOAT_3DNOW
michael@0 94 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
michael@0 95 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
michael@0 96 jnz short .columnDCT
michael@0 97
michael@0 98 pushpic ebx ; save GOT address
michael@0 99 mov ebx, DWORD [DWBLOCK(3,0,esi,SIZEOF_JCOEF)]
michael@0 100 mov eax, DWORD [DWBLOCK(4,0,esi,SIZEOF_JCOEF)]
michael@0 101 or ebx, DWORD [DWBLOCK(5,0,esi,SIZEOF_JCOEF)]
michael@0 102 or eax, DWORD [DWBLOCK(6,0,esi,SIZEOF_JCOEF)]
michael@0 103 or ebx, DWORD [DWBLOCK(7,0,esi,SIZEOF_JCOEF)]
michael@0 104 or eax,ebx
michael@0 105 poppic ebx ; restore GOT address
michael@0 106 jnz short .columnDCT
michael@0 107
michael@0 108 ; -- AC terms all zero
michael@0 109
michael@0 110 movd mm0, DWORD [DWBLOCK(0,0,esi,SIZEOF_JCOEF)]
michael@0 111
michael@0 112 punpcklwd mm0,mm0
michael@0 113 psrad mm0,(DWORD_BIT-WORD_BIT)
michael@0 114 pi2fd mm0,mm0
michael@0 115
michael@0 116 pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 117
michael@0 118 movq mm1,mm0
michael@0 119 punpckldq mm0,mm0
michael@0 120 punpckhdq mm1,mm1
michael@0 121
michael@0 122 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm0
michael@0 123 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm0
michael@0 124 movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm0
michael@0 125 movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
michael@0 126 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1
michael@0 127 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm1
michael@0 128 movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm1
michael@0 129 movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm1
michael@0 130 jmp near .nextcolumn
michael@0 131 alignx 16,7
michael@0 132 %endif
michael@0 133 .columnDCT:
michael@0 134
michael@0 135 ; -- Even part
michael@0 136
michael@0 137 movd mm0, DWORD [DWBLOCK(0,0,esi,SIZEOF_JCOEF)]
michael@0 138 movd mm1, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
michael@0 139 movd mm2, DWORD [DWBLOCK(4,0,esi,SIZEOF_JCOEF)]
michael@0 140 movd mm3, DWORD [DWBLOCK(6,0,esi,SIZEOF_JCOEF)]
michael@0 141
michael@0 142 punpcklwd mm0,mm0
michael@0 143 punpcklwd mm1,mm1
michael@0 144 psrad mm0,(DWORD_BIT-WORD_BIT)
michael@0 145 psrad mm1,(DWORD_BIT-WORD_BIT)
michael@0 146 pi2fd mm0,mm0
michael@0 147 pi2fd mm1,mm1
michael@0 148
michael@0 149 pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 150 pfmul mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 151
michael@0 152 punpcklwd mm2,mm2
michael@0 153 punpcklwd mm3,mm3
michael@0 154 psrad mm2,(DWORD_BIT-WORD_BIT)
michael@0 155 psrad mm3,(DWORD_BIT-WORD_BIT)
michael@0 156 pi2fd mm2,mm2
michael@0 157 pi2fd mm3,mm3
michael@0 158
michael@0 159 pfmul mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 160 pfmul mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 161
michael@0 162 movq mm4,mm0
michael@0 163 movq mm5,mm1
michael@0 164 pfsub mm0,mm2 ; mm0=tmp11
michael@0 165 pfsub mm1,mm3
michael@0 166 pfadd mm4,mm2 ; mm4=tmp10
michael@0 167 pfadd mm5,mm3 ; mm5=tmp13
michael@0 168
michael@0 169 pfmul mm1,[GOTOFF(ebx,PD_1_414)]
michael@0 170 pfsub mm1,mm5 ; mm1=tmp12
michael@0 171
michael@0 172 movq mm6,mm4
michael@0 173 movq mm7,mm0
michael@0 174 pfsub mm4,mm5 ; mm4=tmp3
michael@0 175 pfsub mm0,mm1 ; mm0=tmp2
michael@0 176 pfadd mm6,mm5 ; mm6=tmp0
michael@0 177 pfadd mm7,mm1 ; mm7=tmp1
michael@0 178
michael@0 179 movq MMWORD [wk(1)], mm4 ; tmp3
michael@0 180 movq MMWORD [wk(0)], mm0 ; tmp2
michael@0 181
michael@0 182 ; -- Odd part
michael@0 183
michael@0 184 movd mm2, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
michael@0 185 movd mm3, DWORD [DWBLOCK(3,0,esi,SIZEOF_JCOEF)]
michael@0 186 movd mm5, DWORD [DWBLOCK(5,0,esi,SIZEOF_JCOEF)]
michael@0 187 movd mm1, DWORD [DWBLOCK(7,0,esi,SIZEOF_JCOEF)]
michael@0 188
michael@0 189 punpcklwd mm2,mm2
michael@0 190 punpcklwd mm3,mm3
michael@0 191 psrad mm2,(DWORD_BIT-WORD_BIT)
michael@0 192 psrad mm3,(DWORD_BIT-WORD_BIT)
michael@0 193 pi2fd mm2,mm2
michael@0 194 pi2fd mm3,mm3
michael@0 195
michael@0 196 pfmul mm2, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 197 pfmul mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 198
michael@0 199 punpcklwd mm5,mm5
michael@0 200 punpcklwd mm1,mm1
michael@0 201 psrad mm5,(DWORD_BIT-WORD_BIT)
michael@0 202 psrad mm1,(DWORD_BIT-WORD_BIT)
michael@0 203 pi2fd mm5,mm5
michael@0 204 pi2fd mm1,mm1
michael@0 205
michael@0 206 pfmul mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 207 pfmul mm1, MMWORD [MMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
michael@0 208
michael@0 209 movq mm4,mm2
michael@0 210 movq mm0,mm5
michael@0 211 pfadd mm2,mm1 ; mm2=z11
michael@0 212 pfadd mm5,mm3 ; mm5=z13
michael@0 213 pfsub mm4,mm1 ; mm4=z12
michael@0 214 pfsub mm0,mm3 ; mm0=z10
michael@0 215
michael@0 216 movq mm1,mm2
michael@0 217 pfsub mm2,mm5
michael@0 218 pfadd mm1,mm5 ; mm1=tmp7
michael@0 219
michael@0 220 pfmul mm2,[GOTOFF(ebx,PD_1_414)] ; mm2=tmp11
michael@0 221
michael@0 222 movq mm3,mm0
michael@0 223 pfadd mm0,mm4
michael@0 224 pfmul mm0,[GOTOFF(ebx,PD_1_847)] ; mm0=z5
michael@0 225 pfmul mm3,[GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930)
michael@0 226 pfmul mm4,[GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200)
michael@0 227 pfsubr mm3,mm0 ; mm3=tmp12
michael@0 228 pfsub mm4,mm0 ; mm4=tmp10
michael@0 229
michael@0 230 ; -- Final output stage
michael@0 231
michael@0 232 pfsub mm3,mm1 ; mm3=tmp6
michael@0 233 movq mm5,mm6
michael@0 234 movq mm0,mm7
michael@0 235 pfadd mm6,mm1 ; mm6=data0=(00 01)
michael@0 236 pfadd mm7,mm3 ; mm7=data1=(10 11)
michael@0 237 pfsub mm5,mm1 ; mm5=data7=(70 71)
michael@0 238 pfsub mm0,mm3 ; mm0=data6=(60 61)
michael@0 239 pfsub mm2,mm3 ; mm2=tmp5
michael@0 240
michael@0 241 movq mm1,mm6 ; transpose coefficients
michael@0 242 punpckldq mm6,mm7 ; mm6=(00 10)
michael@0 243 punpckhdq mm1,mm7 ; mm1=(01 11)
michael@0 244 movq mm3,mm0 ; transpose coefficients
michael@0 245 punpckldq mm0,mm5 ; mm0=(60 70)
michael@0 246 punpckhdq mm3,mm5 ; mm3=(61 71)
michael@0 247
michael@0 248 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm6
michael@0 249 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1
michael@0 250 movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
michael@0 251 movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm3
michael@0 252
michael@0 253 movq mm7, MMWORD [wk(0)] ; mm7=tmp2
michael@0 254 movq mm5, MMWORD [wk(1)] ; mm5=tmp3
michael@0 255
michael@0 256 pfadd mm4,mm2 ; mm4=tmp4
michael@0 257 movq mm6,mm7
michael@0 258 movq mm1,mm5
michael@0 259 pfadd mm7,mm2 ; mm7=data2=(20 21)
michael@0 260 pfadd mm5,mm4 ; mm5=data4=(40 41)
michael@0 261 pfsub mm6,mm2 ; mm6=data5=(50 51)
michael@0 262 pfsub mm1,mm4 ; mm1=data3=(30 31)
michael@0 263
michael@0 264 movq mm0,mm7 ; transpose coefficients
michael@0 265 punpckldq mm7,mm1 ; mm7=(20 30)
michael@0 266 punpckhdq mm0,mm1 ; mm0=(21 31)
michael@0 267 movq mm3,mm5 ; transpose coefficients
michael@0 268 punpckldq mm5,mm6 ; mm5=(40 50)
michael@0 269 punpckhdq mm3,mm6 ; mm3=(41 51)
michael@0 270
michael@0 271 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm7
michael@0 272 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm0
michael@0 273 movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm5
michael@0 274 movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm3
michael@0 275
michael@0 276 .nextcolumn:
michael@0 277 add esi, byte 2*SIZEOF_JCOEF ; coef_block
michael@0 278 add edx, byte 2*SIZEOF_FLOAT_MULT_TYPE ; quantptr
michael@0 279 add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
michael@0 280 dec ecx ; ctr
michael@0 281 jnz near .columnloop
michael@0 282
michael@0 283 ; -- Prefetch the next coefficient block
michael@0 284
michael@0 285 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
michael@0 286 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
michael@0 287 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
michael@0 288 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
michael@0 289
michael@0 290 ; ---- Pass 2: process rows from work array, store into output array.
michael@0 291
michael@0 292 mov eax, [original_ebp]
michael@0 293 lea esi, [workspace] ; FAST_FLOAT * wsptr
michael@0 294 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
michael@0 295 mov eax, JDIMENSION [output_col(eax)]
michael@0 296 mov ecx, DCTSIZE/2 ; ctr
michael@0 297 alignx 16,7
michael@0 298 .rowloop:
michael@0 299
michael@0 300 ; -- Even part
michael@0 301
michael@0 302 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 303 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 304 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 305 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 306
michael@0 307 movq mm4,mm0
michael@0 308 movq mm5,mm1
michael@0 309 pfsub mm0,mm2 ; mm0=tmp11
michael@0 310 pfsub mm1,mm3
michael@0 311 pfadd mm4,mm2 ; mm4=tmp10
michael@0 312 pfadd mm5,mm3 ; mm5=tmp13
michael@0 313
michael@0 314 pfmul mm1,[GOTOFF(ebx,PD_1_414)]
michael@0 315 pfsub mm1,mm5 ; mm1=tmp12
michael@0 316
michael@0 317 movq mm6,mm4
michael@0 318 movq mm7,mm0
michael@0 319 pfsub mm4,mm5 ; mm4=tmp3
michael@0 320 pfsub mm0,mm1 ; mm0=tmp2
michael@0 321 pfadd mm6,mm5 ; mm6=tmp0
michael@0 322 pfadd mm7,mm1 ; mm7=tmp1
michael@0 323
michael@0 324 movq MMWORD [wk(1)], mm4 ; tmp3
michael@0 325 movq MMWORD [wk(0)], mm0 ; tmp2
michael@0 326
michael@0 327 ; -- Odd part
michael@0 328
michael@0 329 movq mm2, MMWORD [MMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 330 movq mm3, MMWORD [MMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 331 movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 332 movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
michael@0 333
michael@0 334 movq mm4,mm2
michael@0 335 movq mm0,mm5
michael@0 336 pfadd mm2,mm1 ; mm2=z11
michael@0 337 pfadd mm5,mm3 ; mm5=z13
michael@0 338 pfsub mm4,mm1 ; mm4=z12
michael@0 339 pfsub mm0,mm3 ; mm0=z10
michael@0 340
michael@0 341 movq mm1,mm2
michael@0 342 pfsub mm2,mm5
michael@0 343 pfadd mm1,mm5 ; mm1=tmp7
michael@0 344
michael@0 345 pfmul mm2,[GOTOFF(ebx,PD_1_414)] ; mm2=tmp11
michael@0 346
michael@0 347 movq mm3,mm0
michael@0 348 pfadd mm0,mm4
michael@0 349 pfmul mm0,[GOTOFF(ebx,PD_1_847)] ; mm0=z5
michael@0 350 pfmul mm3,[GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930)
michael@0 351 pfmul mm4,[GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200)
michael@0 352 pfsubr mm3,mm0 ; mm3=tmp12
michael@0 353 pfsub mm4,mm0 ; mm4=tmp10
michael@0 354
michael@0 355 ; -- Final output stage
michael@0 356
michael@0 357 pfsub mm3,mm1 ; mm3=tmp6
michael@0 358 movq mm5,mm6
michael@0 359 movq mm0,mm7
michael@0 360 pfadd mm6,mm1 ; mm6=data0=(00 10)
michael@0 361 pfadd mm7,mm3 ; mm7=data1=(01 11)
michael@0 362 pfsub mm5,mm1 ; mm5=data7=(07 17)
michael@0 363 pfsub mm0,mm3 ; mm0=data6=(06 16)
michael@0 364 pfsub mm2,mm3 ; mm2=tmp5
michael@0 365
michael@0 366 movq mm1,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm1=[PD_RNDINT_MAGIC]
michael@0 367 pcmpeqd mm3,mm3
michael@0 368 psrld mm3,WORD_BIT ; mm3={0xFFFF 0x0000 0xFFFF 0x0000}
michael@0 369
michael@0 370 pfadd mm6,mm1 ; mm6=roundint(data0/8)=(00 ** 10 **)
michael@0 371 pfadd mm7,mm1 ; mm7=roundint(data1/8)=(01 ** 11 **)
michael@0 372 pfadd mm0,mm1 ; mm0=roundint(data6/8)=(06 ** 16 **)
michael@0 373 pfadd mm5,mm1 ; mm5=roundint(data7/8)=(07 ** 17 **)
michael@0 374
michael@0 375 pand mm6,mm3 ; mm6=(00 -- 10 --)
michael@0 376 pslld mm7,WORD_BIT ; mm7=(-- 01 -- 11)
michael@0 377 pand mm0,mm3 ; mm0=(06 -- 16 --)
michael@0 378 pslld mm5,WORD_BIT ; mm5=(-- 07 -- 17)
michael@0 379 por mm6,mm7 ; mm6=(00 01 10 11)
michael@0 380 por mm0,mm5 ; mm0=(06 07 16 17)
michael@0 381
michael@0 382 movq mm1, MMWORD [wk(0)] ; mm1=tmp2
michael@0 383 movq mm3, MMWORD [wk(1)] ; mm3=tmp3
michael@0 384
michael@0 385 pfadd mm4,mm2 ; mm4=tmp4
michael@0 386 movq mm7,mm1
michael@0 387 movq mm5,mm3
michael@0 388 pfadd mm1,mm2 ; mm1=data2=(02 12)
michael@0 389 pfadd mm3,mm4 ; mm3=data4=(04 14)
michael@0 390 pfsub mm7,mm2 ; mm7=data5=(05 15)
michael@0 391 pfsub mm5,mm4 ; mm5=data3=(03 13)
michael@0 392
michael@0 393 movq mm2,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm2=[PD_RNDINT_MAGIC]
michael@0 394 pcmpeqd mm4,mm4
michael@0 395 psrld mm4,WORD_BIT ; mm4={0xFFFF 0x0000 0xFFFF 0x0000}
michael@0 396
michael@0 397 pfadd mm3,mm2 ; mm3=roundint(data4/8)=(04 ** 14 **)
michael@0 398 pfadd mm7,mm2 ; mm7=roundint(data5/8)=(05 ** 15 **)
michael@0 399 pfadd mm1,mm2 ; mm1=roundint(data2/8)=(02 ** 12 **)
michael@0 400 pfadd mm5,mm2 ; mm5=roundint(data3/8)=(03 ** 13 **)
michael@0 401
michael@0 402 pand mm3,mm4 ; mm3=(04 -- 14 --)
michael@0 403 pslld mm7,WORD_BIT ; mm7=(-- 05 -- 15)
michael@0 404 pand mm1,mm4 ; mm1=(02 -- 12 --)
michael@0 405 pslld mm5,WORD_BIT ; mm5=(-- 03 -- 13)
michael@0 406 por mm3,mm7 ; mm3=(04 05 14 15)
michael@0 407 por mm1,mm5 ; mm1=(02 03 12 13)
michael@0 408
michael@0 409 movq mm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm2=[PB_CENTERJSAMP]
michael@0 410
michael@0 411 packsswb mm6,mm3 ; mm6=(00 01 10 11 04 05 14 15)
michael@0 412 packsswb mm1,mm0 ; mm1=(02 03 12 13 06 07 16 17)
michael@0 413 paddb mm6,mm2
michael@0 414 paddb mm1,mm2
michael@0 415
michael@0 416 movq mm4,mm6 ; transpose coefficients(phase 2)
michael@0 417 punpcklwd mm6,mm1 ; mm6=(00 01 02 03 10 11 12 13)
michael@0 418 punpckhwd mm4,mm1 ; mm4=(04 05 06 07 14 15 16 17)
michael@0 419
michael@0 420 movq mm7,mm6 ; transpose coefficients(phase 3)
michael@0 421 punpckldq mm6,mm4 ; mm6=(00 01 02 03 04 05 06 07)
michael@0 422 punpckhdq mm7,mm4 ; mm7=(10 11 12 13 14 15 16 17)
michael@0 423
michael@0 424 pushpic ebx ; save GOT address
michael@0 425
michael@0 426 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
michael@0 427 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
michael@0 428 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm6
michael@0 429 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm7
michael@0 430
michael@0 431 poppic ebx ; restore GOT address
michael@0 432
michael@0 433 add esi, byte 2*SIZEOF_FAST_FLOAT ; wsptr
michael@0 434 add edi, byte 2*SIZEOF_JSAMPROW
michael@0 435 dec ecx ; ctr
michael@0 436 jnz near .rowloop
michael@0 437
michael@0 438 femms ; empty MMX/3DNow! state
michael@0 439
michael@0 440 pop edi
michael@0 441 pop esi
michael@0 442 ; pop edx ; need not be preserved
michael@0 443 ; pop ecx ; need not be preserved
michael@0 444 pop ebx
michael@0 445 mov esp,ebp ; esp <- aligned ebp
michael@0 446 pop esp ; esp <- original ebp
michael@0 447 pop ebp
michael@0 448 ret
michael@0 449
michael@0 450 ; For some reason, the OS X linker does not honor the request to align the
michael@0 451 ; segment unless we do this.
michael@0 452 align 16

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