simd/jfmmxint.asm - Issue 1953443002: Update to libjpeg_turbo 1.4.90

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Issue 1953443002: Update to libjpeg_turbo 1.4.90 (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git@master

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1 ;

2 ; jfmmxint.asm - accurate integer FDCT (MMX)

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 slow-but-accurate integer implementation of the

18 ; forward DCT (Discrete Cosine Transform). The following code is based

19 ; directly on the IJG's original jfdctint.c; see the jfdctint.c for

20 ; 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 (CONST_BITS-PASS1_BITS)

33 %define DESCALE_P2 (CONST_BITS+PASS1_BITS)

34

35 %if CONST_BITS == 13

36 F_0_298 equ 2446 ; FIX(0.298631336)

37 F_0_390 equ 3196 ; FIX(0.390180644)

38 F_0_541 equ 4433 ; FIX(0.541196100)

39 F_0_765 equ 6270 ; FIX(0.765366865)

40 F_0_899 equ 7373 ; FIX(0.899976223)

41 F_1_175 equ 9633 ; FIX(1.175875602)

42 F_1_501 equ 12299 ; FIX(1.501321110)

43 F_1_847 equ 15137 ; FIX(1.847759065)

44 F_1_961 equ 16069 ; FIX(1.961570560)

45 F_2_053 equ 16819 ; FIX(2.053119869)

46 F_2_562 equ 20995 ; FIX(2.562915447)

47 F_3_072 equ 25172 ; FIX(3.072711026)

48 %else

49 ; NASM cannot do compile-time arithmetic on floating-point constants.

50 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))

51 F_0_298 equ DESCALE( 320652955,30-CONST_BITS) ; FIX(0.298631336)

52 F_0_390 equ DESCALE( 418953276,30-CONST_BITS) ; FIX(0.390180644)

53 F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100)

54 F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865)

55 F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223)

56 F_1_175 equ DESCALE(1262586813,30-CONST_BITS) ; FIX(1.175875602)

57 F_1_501 equ DESCALE(1612031267,30-CONST_BITS) ; FIX(1.501321110)

58 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)

59 F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560)

60 F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869)

61 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447)

62 F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026)

63 %endif

64

65 ; --------------------------------------------------------------------------

66 SECTION SEG_CONST

67

68 alignz 16

69 global EXTN(jconst_fdct_islow_mmx) PRIVATE

70

71 EXTN(jconst_fdct_islow_mmx):

72

73 PW_F130_F054 times 2 dw (F_0_541+F_0_765), F_0_541

74 PW_F054_MF130 times 2 dw F_0_541, (F_0_541-F_1_847)

75 PW_MF078_F117 times 2 dw (F_1_175-F_1_961), F_1_175

76 PW_F117_F078 times 2 dw F_1_175, (F_1_175-F_0_390)

77 PW_MF060_MF089 times 2 dw (F_0_298-F_0_899),-F_0_899

78 PW_MF089_F060 times 2 dw -F_0_899, (F_1_501-F_0_899)

79 PW_MF050_MF256 times 2 dw (F_2_053-F_2_562),-F_2_562

80 PW_MF256_F050 times 2 dw -F_2_562, (F_3_072-F_2_562)

81 PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1-1)

82 PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2-1)

83 PW_DESCALE_P2X times 4 dw 1 << (PASS1_BITS-1)

84

85 alignz 16

86

87 ; --------------------------------------------------------------------------

88 SECTION SEG_TEXT

89 BITS 32

90 ;

91 ; Perform the forward DCT on one block of samples.

92 ;

93 ; GLOBAL(void)

94 ; jsimd_fdct_islow_mmx (DCTELEM * data)

95 ;

96

97 %define data(b) (b)+8 ; DCTELEM * data

98

99 %define original_ebp ebp+0

100 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]

101 %define WK_NUM 2

102

103 align 16

104 global EXTN(jsimd_fdct_islow_mmx) PRIVATE

105

106 EXTN(jsimd_fdct_islow_mmx):

107 push ebp

108 mov eax,esp ; eax = original ebp

109 sub esp, byte 4

110 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits

111 mov [esp],eax

112 mov ebp,esp ; ebp = aligned ebp

113 lea esp, [wk(0)]

114 pushpic ebx

115 ; push ecx ; need not be preserved

116 ; push edx ; need not be preserved

117 ; push esi ; unused

118 ; push edi ; unused

119

120 get_GOT ebx ; get GOT address

121

122 ; ---- Pass 1: process rows.

123

124 mov edx, POINTER [data(eax)] ; (DCTELEM *)

125 mov ecx, DCTSIZE/4

126 alignx 16,7

127 .rowloop:

128

129 movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)]

130 movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)]

131 movq mm2, MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)]

132 movq mm3, MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)]

133

134 ; mm0=(20 21 22 23), mm2=(24 25 26 27)

135 ; mm1=(30 31 32 33), mm3=(34 35 36 37)

136

137 movq mm4,mm0 ; transpose coefficients(phase 1)

138 punpcklwd mm0,mm1 ; mm0=(20 30 21 31)

139 punpckhwd mm4,mm1 ; mm4=(22 32 23 33)

140 movq mm5,mm2 ; transpose coefficients(phase 1)

141 punpcklwd mm2,mm3 ; mm2=(24 34 25 35)

142 punpckhwd mm5,mm3 ; mm5=(26 36 27 37)

143

144 movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)]

145 movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)]

146 movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)]

147 movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)]

148

149 ; mm6=(00 01 02 03), mm1=(04 05 06 07)

150 ; mm7=(10 11 12 13), mm3=(14 15 16 17)

151

152 movq MMWORD [wk(0)], mm4 ; wk(0)=(22 32 23 33)

153 movq MMWORD [wk(1)], mm2 ; wk(1)=(24 34 25 35)

154

155 movq mm4,mm6 ; transpose coefficients(phase 1)

156 punpcklwd mm6,mm7 ; mm6=(00 10 01 11)

157 punpckhwd mm4,mm7 ; mm4=(02 12 03 13)

158 movq mm2,mm1 ; transpose coefficients(phase 1)

159 punpcklwd mm1,mm3 ; mm1=(04 14 05 15)

160 punpckhwd mm2,mm3 ; mm2=(06 16 07 17)

161

162 movq mm7,mm6 ; transpose coefficients(phase 2)

163 punpckldq mm6,mm0 ; mm6=(00 10 20 30)=data0

164 punpckhdq mm7,mm0 ; mm7=(01 11 21 31)=data1

165 movq mm3,mm2 ; transpose coefficients(phase 2)

166 punpckldq mm2,mm5 ; mm2=(06 16 26 36)=data6

167 punpckhdq mm3,mm5 ; mm3=(07 17 27 37)=data7

168

169 movq mm0,mm7

170 movq mm5,mm6

171 psubw mm7,mm2 ; mm7=data1-data6=tmp6

172 psubw mm6,mm3 ; mm6=data0-data7=tmp7

173 paddw mm0,mm2 ; mm0=data1+data6=tmp1

174 paddw mm5,mm3 ; mm5=data0+data7=tmp0

175

176 movq mm2, MMWORD [wk(0)] ; mm2=(22 32 23 33)

177 movq mm3, MMWORD [wk(1)] ; mm3=(24 34 25 35)

178 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6

179 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7

180

181 movq mm7,mm4 ; transpose coefficients(phase 2)

182 punpckldq mm4,mm2 ; mm4=(02 12 22 32)=data2

183 punpckhdq mm7,mm2 ; mm7=(03 13 23 33)=data3

184 movq mm6,mm1 ; transpose coefficients(phase 2)

185 punpckldq mm1,mm3 ; mm1=(04 14 24 34)=data4

186 punpckhdq mm6,mm3 ; mm6=(05 15 25 35)=data5

187

188 movq mm2,mm7

189 movq mm3,mm4

190 paddw mm7,mm1 ; mm7=data3+data4=tmp3

191 paddw mm4,mm6 ; mm4=data2+data5=tmp2

192 psubw mm2,mm1 ; mm2=data3-data4=tmp4

193 psubw mm3,mm6 ; mm3=data2-data5=tmp5

194

195 ; -- Even part

196

197 movq mm1,mm5

198 movq mm6,mm0

199 paddw mm5,mm7 ; mm5=tmp10

200 paddw mm0,mm4 ; mm0=tmp11

201 psubw mm1,mm7 ; mm1=tmp13

202 psubw mm6,mm4 ; mm6=tmp12

203

204 movq mm7,mm5

205 paddw mm5,mm0 ; mm5=tmp10+tmp11

206 psubw mm7,mm0 ; mm7=tmp10-tmp11

207

208 psllw mm5,PASS1_BITS ; mm5=data0

209 psllw mm7,PASS1_BITS ; mm7=data4

210

211 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm5

212 movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)], mm7

213

214 ; (Original)

215 ; z1 = (tmp12 + tmp13) * 0.541196100;

216 ; data2 = z1 + tmp13 * 0.765366865;

217 ; data6 = z1 + tmp12 * -1.847759065;

218 ;

219 ; (This implementation)

220 ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100;

221 ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065);

222

223 movq mm4,mm1 ; mm1=tmp13

224 movq mm0,mm1

225 punpcklwd mm4,mm6 ; mm6=tmp12

226 punpckhwd mm0,mm6

227 movq mm1,mm4

228 movq mm6,mm0

229 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=data2L

230 pmaddwd mm0,[GOTOFF(ebx,PW_F130_F054)] ; mm0=data2H

231 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=data6L

232 pmaddwd mm6,[GOTOFF(ebx,PW_F054_MF130)] ; mm6=data6H

233

234 paddd mm4,[GOTOFF(ebx,PD_DESCALE_P1)]

235 paddd mm0,[GOTOFF(ebx,PD_DESCALE_P1)]

236 psrad mm4,DESCALE_P1

237 psrad mm0,DESCALE_P1

238 paddd mm1,[GOTOFF(ebx,PD_DESCALE_P1)]

239 paddd mm6,[GOTOFF(ebx,PD_DESCALE_P1)]

240 psrad mm1,DESCALE_P1

241 psrad mm6,DESCALE_P1

242

243 packssdw mm4,mm0 ; mm4=data2

244 packssdw mm1,mm6 ; mm1=data6

245

246 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4

247 movq MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)], mm1

248

249 ; -- Odd part

250

251 movq mm5, MMWORD [wk(0)] ; mm5=tmp6

252 movq mm7, MMWORD [wk(1)] ; mm7=tmp7

253

254 movq mm0,mm2 ; mm2=tmp4

255 movq mm6,mm3 ; mm3=tmp5

256 paddw mm0,mm5 ; mm0=z3

257 paddw mm6,mm7 ; mm6=z4

258

259 ; (Original)

260 ; z5 = (z3 + z4) * 1.175875602;

261 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;

262 ; z3 += z5; z4 += z5;

263 ;

264 ; (This implementation)

265 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;

266 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);

267

268 movq mm4,mm0

269 movq mm1,mm0

270 punpcklwd mm4,mm6

271 punpckhwd mm1,mm6

272 movq mm0,mm4

273 movq mm6,mm1

274 pmaddwd mm4,[GOTOFF(ebx,PW_MF078_F117)] ; mm4=z3L

275 pmaddwd mm1,[GOTOFF(ebx,PW_MF078_F117)] ; mm1=z3H

276 pmaddwd mm0,[GOTOFF(ebx,PW_F117_F078)] ; mm0=z4L

277 pmaddwd mm6,[GOTOFF(ebx,PW_F117_F078)] ; mm6=z4H

278

279 movq MMWORD [wk(0)], mm4 ; wk(0)=z3L

280 movq MMWORD [wk(1)], mm1 ; wk(1)=z3H

281

282 ; (Original)

283 ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6;

284 ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869;

285 ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110;

286 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;

287 ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4;

288 ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4;

289 ;

290 ; (This implementation)

291 ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223;

292 ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447;

293 ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447);

294 ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223);

295 ; data7 = tmp4 + z3; data5 = tmp5 + z4;

296 ; data3 = tmp6 + z3; data1 = tmp7 + z4;

297

298 movq mm4,mm2

299 movq mm1,mm2

300 punpcklwd mm4,mm7

301 punpckhwd mm1,mm7

302 movq mm2,mm4

303 movq mm7,mm1

304 pmaddwd mm4,[GOTOFF(ebx,PW_MF060_MF089)] ; mm4=tmp4L

305 pmaddwd mm1,[GOTOFF(ebx,PW_MF060_MF089)] ; mm1=tmp4H

306 pmaddwd mm2,[GOTOFF(ebx,PW_MF089_F060)] ; mm2=tmp7L

307 pmaddwd mm7,[GOTOFF(ebx,PW_MF089_F060)] ; mm7=tmp7H

308

309 paddd mm4, MMWORD [wk(0)] ; mm4=data7L

310 paddd mm1, MMWORD [wk(1)] ; mm1=data7H

311 paddd mm2,mm0 ; mm2=data1L

312 paddd mm7,mm6 ; mm7=data1H

313

314 paddd mm4,[GOTOFF(ebx,PD_DESCALE_P1)]

315 paddd mm1,[GOTOFF(ebx,PD_DESCALE_P1)]

316 psrad mm4,DESCALE_P1

317 psrad mm1,DESCALE_P1

318 paddd mm2,[GOTOFF(ebx,PD_DESCALE_P1)]

319 paddd mm7,[GOTOFF(ebx,PD_DESCALE_P1)]

320 psrad mm2,DESCALE_P1

321 psrad mm7,DESCALE_P1

322

323 packssdw mm4,mm1 ; mm4=data7

324 packssdw mm2,mm7 ; mm2=data1

325

326 movq MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)], mm4

327 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm2

328

329 movq mm1,mm3

330 movq mm7,mm3

331 punpcklwd mm1,mm5

332 punpckhwd mm7,mm5

333 movq mm3,mm1

334 movq mm5,mm7

335 pmaddwd mm1,[GOTOFF(ebx,PW_MF050_MF256)] ; mm1=tmp5L

336 pmaddwd mm7,[GOTOFF(ebx,PW_MF050_MF256)] ; mm7=tmp5H

337 pmaddwd mm3,[GOTOFF(ebx,PW_MF256_F050)] ; mm3=tmp6L

338 pmaddwd mm5,[GOTOFF(ebx,PW_MF256_F050)] ; mm5=tmp6H

339

340 paddd mm1,mm0 ; mm1=data5L

341 paddd mm7,mm6 ; mm7=data5H

342 paddd mm3, MMWORD [wk(0)] ; mm3=data3L

343 paddd mm5, MMWORD [wk(1)] ; mm5=data3H

344

345 paddd mm1,[GOTOFF(ebx,PD_DESCALE_P1)]

346 paddd mm7,[GOTOFF(ebx,PD_DESCALE_P1)]

347 psrad mm1,DESCALE_P1

348 psrad mm7,DESCALE_P1

349 paddd mm3,[GOTOFF(ebx,PD_DESCALE_P1)]

350 paddd mm5,[GOTOFF(ebx,PD_DESCALE_P1)]

351 psrad mm3,DESCALE_P1

352 psrad mm5,DESCALE_P1

353

354 packssdw mm1,mm7 ; mm1=data5

355 packssdw mm3,mm5 ; mm3=data3

356

357 movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)], mm1

358 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm3

359

360 add edx, byte 4DCTSIZESIZEOF_DCTELEM

361 dec ecx

362 jnz near .rowloop

363

364 ; ---- Pass 2: process columns.

365

366 mov edx, POINTER [data(eax)] ; (DCTELEM *)

367 mov ecx, DCTSIZE/4

368 alignx 16,7

369 .columnloop:

370

371 movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)]

372 movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)]

373 movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)]

374 movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)]

375

376 ; mm0=(02 12 22 32), mm2=(42 52 62 72)

377 ; mm1=(03 13 23 33), mm3=(43 53 63 73)

378

379 movq mm4,mm0 ; transpose coefficients(phase 1)

380 punpcklwd mm0,mm1 ; mm0=(02 03 12 13)

381 punpckhwd mm4,mm1 ; mm4=(22 23 32 33)

382 movq mm5,mm2 ; transpose coefficients(phase 1)

383 punpcklwd mm2,mm3 ; mm2=(42 43 52 53)

384 punpckhwd mm5,mm3 ; mm5=(62 63 72 73)

385

386 movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)]

387 movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)]

388 movq mm1, MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)]

389 movq mm3, MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)]

390

391 ; mm6=(00 10 20 30), mm1=(40 50 60 70)

392 ; mm7=(01 11 21 31), mm3=(41 51 61 71)

393

394 movq MMWORD [wk(0)], mm4 ; wk(0)=(22 23 32 33)

395 movq MMWORD [wk(1)], mm2 ; wk(1)=(42 43 52 53)

396

397 movq mm4,mm6 ; transpose coefficients(phase 1)

398 punpcklwd mm6,mm7 ; mm6=(00 01 10 11)

399 punpckhwd mm4,mm7 ; mm4=(20 21 30 31)

400 movq mm2,mm1 ; transpose coefficients(phase 1)

401 punpcklwd mm1,mm3 ; mm1=(40 41 50 51)

402 punpckhwd mm2,mm3 ; mm2=(60 61 70 71)

403

404 movq mm7,mm6 ; transpose coefficients(phase 2)

405 punpckldq mm6,mm0 ; mm6=(00 01 02 03)=data0

406 punpckhdq mm7,mm0 ; mm7=(10 11 12 13)=data1

407 movq mm3,mm2 ; transpose coefficients(phase 2)

408 punpckldq mm2,mm5 ; mm2=(60 61 62 63)=data6

409 punpckhdq mm3,mm5 ; mm3=(70 71 72 73)=data7

410

411 movq mm0,mm7

412 movq mm5,mm6

413 psubw mm7,mm2 ; mm7=data1-data6=tmp6

414 psubw mm6,mm3 ; mm6=data0-data7=tmp7

415 paddw mm0,mm2 ; mm0=data1+data6=tmp1

416 paddw mm5,mm3 ; mm5=data0+data7=tmp0

417

418 movq mm2, MMWORD [wk(0)] ; mm2=(22 23 32 33)

419 movq mm3, MMWORD [wk(1)] ; mm3=(42 43 52 53)

420 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6

421 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7

422

423 movq mm7,mm4 ; transpose coefficients(phase 2)

424 punpckldq mm4,mm2 ; mm4=(20 21 22 23)=data2

425 punpckhdq mm7,mm2 ; mm7=(30 31 32 33)=data3

426 movq mm6,mm1 ; transpose coefficients(phase 2)

427 punpckldq mm1,mm3 ; mm1=(40 41 42 43)=data4

428 punpckhdq mm6,mm3 ; mm6=(50 51 52 53)=data5

429

430 movq mm2,mm7

431 movq mm3,mm4

432 paddw mm7,mm1 ; mm7=data3+data4=tmp3

433 paddw mm4,mm6 ; mm4=data2+data5=tmp2

434 psubw mm2,mm1 ; mm2=data3-data4=tmp4

435 psubw mm3,mm6 ; mm3=data2-data5=tmp5

436

437 ; -- Even part

438

439 movq mm1,mm5

440 movq mm6,mm0

441 paddw mm5,mm7 ; mm5=tmp10

442 paddw mm0,mm4 ; mm0=tmp11

443 psubw mm1,mm7 ; mm1=tmp13

444 psubw mm6,mm4 ; mm6=tmp12

445

446 movq mm7,mm5

447 paddw mm5,mm0 ; mm5=tmp10+tmp11

448 psubw mm7,mm0 ; mm7=tmp10-tmp11

449

450 paddw mm5,[GOTOFF(ebx,PW_DESCALE_P2X)]

451 paddw mm7,[GOTOFF(ebx,PW_DESCALE_P2X)]

452 psraw mm5,PASS1_BITS ; mm5=data0

453 psraw mm7,PASS1_BITS ; mm7=data4

454

455 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm5

456 movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)], mm7

457

458 ; (Original)

459 ; z1 = (tmp12 + tmp13) * 0.541196100;

460 ; data2 = z1 + tmp13 * 0.765366865;

461 ; data6 = z1 + tmp12 * -1.847759065;

462 ;

463 ; (This implementation)

464 ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100;

465 ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065);

466

467 movq mm4,mm1 ; mm1=tmp13

468 movq mm0,mm1

469 punpcklwd mm4,mm6 ; mm6=tmp12

470 punpckhwd mm0,mm6

471 movq mm1,mm4

472 movq mm6,mm0

473 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=data2L

474 pmaddwd mm0,[GOTOFF(ebx,PW_F130_F054)] ; mm0=data2H

475 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=data6L

476 pmaddwd mm6,[GOTOFF(ebx,PW_F054_MF130)] ; mm6=data6H

477

478 paddd mm4,[GOTOFF(ebx,PD_DESCALE_P2)]

479 paddd mm0,[GOTOFF(ebx,PD_DESCALE_P2)]

480 psrad mm4,DESCALE_P2

481 psrad mm0,DESCALE_P2

482 paddd mm1,[GOTOFF(ebx,PD_DESCALE_P2)]

483 paddd mm6,[GOTOFF(ebx,PD_DESCALE_P2)]

484 psrad mm1,DESCALE_P2

485 psrad mm6,DESCALE_P2

486

487 packssdw mm4,mm0 ; mm4=data2

488 packssdw mm1,mm6 ; mm1=data6

489

490 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4

491 movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)], mm1

492

493 ; -- Odd part

494

495 movq mm5, MMWORD [wk(0)] ; mm5=tmp6

496 movq mm7, MMWORD [wk(1)] ; mm7=tmp7

497

498 movq mm0,mm2 ; mm2=tmp4

499 movq mm6,mm3 ; mm3=tmp5

500 paddw mm0,mm5 ; mm0=z3

501 paddw mm6,mm7 ; mm6=z4

502

503 ; (Original)

504 ; z5 = (z3 + z4) * 1.175875602;

505 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;

506 ; z3 += z5; z4 += z5;

507 ;

508 ; (This implementation)

509 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;

510 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);

511

512 movq mm4,mm0

513 movq mm1,mm0

514 punpcklwd mm4,mm6

515 punpckhwd mm1,mm6

516 movq mm0,mm4

517 movq mm6,mm1

518 pmaddwd mm4,[GOTOFF(ebx,PW_MF078_F117)] ; mm4=z3L

519 pmaddwd mm1,[GOTOFF(ebx,PW_MF078_F117)] ; mm1=z3H

520 pmaddwd mm0,[GOTOFF(ebx,PW_F117_F078)] ; mm0=z4L

521 pmaddwd mm6,[GOTOFF(ebx,PW_F117_F078)] ; mm6=z4H

522

523 movq MMWORD [wk(0)], mm4 ; wk(0)=z3L

524 movq MMWORD [wk(1)], mm1 ; wk(1)=z3H

525

526 ; (Original)

527 ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6;

528 ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869;

529 ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110;

530 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;

531 ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4;

532 ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4;

533 ;

534 ; (This implementation)

535 ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223;

536 ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447;

537 ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447);

538 ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223);

539 ; data7 = tmp4 + z3; data5 = tmp5 + z4;

540 ; data3 = tmp6 + z3; data1 = tmp7 + z4;

541

542 movq mm4,mm2

543 movq mm1,mm2

544 punpcklwd mm4,mm7

545 punpckhwd mm1,mm7

546 movq mm2,mm4

547 movq mm7,mm1

548 pmaddwd mm4,[GOTOFF(ebx,PW_MF060_MF089)] ; mm4=tmp4L

549 pmaddwd mm1,[GOTOFF(ebx,PW_MF060_MF089)] ; mm1=tmp4H

550 pmaddwd mm2,[GOTOFF(ebx,PW_MF089_F060)] ; mm2=tmp7L

551 pmaddwd mm7,[GOTOFF(ebx,PW_MF089_F060)] ; mm7=tmp7H

552

553 paddd mm4, MMWORD [wk(0)] ; mm4=data7L

554 paddd mm1, MMWORD [wk(1)] ; mm1=data7H

555 paddd mm2,mm0 ; mm2=data1L

556 paddd mm7,mm6 ; mm7=data1H

557

558 paddd mm4,[GOTOFF(ebx,PD_DESCALE_P2)]

559 paddd mm1,[GOTOFF(ebx,PD_DESCALE_P2)]

560 psrad mm4,DESCALE_P2

561 psrad mm1,DESCALE_P2

562 paddd mm2,[GOTOFF(ebx,PD_DESCALE_P2)]

563 paddd mm7,[GOTOFF(ebx,PD_DESCALE_P2)]

564 psrad mm2,DESCALE_P2

565 psrad mm7,DESCALE_P2

566

567 packssdw mm4,mm1 ; mm4=data7

568 packssdw mm2,mm7 ; mm2=data1

569

570 movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)], mm4

571 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm2

572

573 movq mm1,mm3

574 movq mm7,mm3

575 punpcklwd mm1,mm5

576 punpckhwd mm7,mm5

577 movq mm3,mm1

578 movq mm5,mm7

579 pmaddwd mm1,[GOTOFF(ebx,PW_MF050_MF256)] ; mm1=tmp5L

580 pmaddwd mm7,[GOTOFF(ebx,PW_MF050_MF256)] ; mm7=tmp5H

581 pmaddwd mm3,[GOTOFF(ebx,PW_MF256_F050)] ; mm3=tmp6L

582 pmaddwd mm5,[GOTOFF(ebx,PW_MF256_F050)] ; mm5=tmp6H

583

584 paddd mm1,mm0 ; mm1=data5L

585 paddd mm7,mm6 ; mm7=data5H

586 paddd mm3, MMWORD [wk(0)] ; mm3=data3L

587 paddd mm5, MMWORD [wk(1)] ; mm5=data3H

588

589 paddd mm1,[GOTOFF(ebx,PD_DESCALE_P2)]

590 paddd mm7,[GOTOFF(ebx,PD_DESCALE_P2)]

591 psrad mm1,DESCALE_P2

592 psrad mm7,DESCALE_P2

593 paddd mm3,[GOTOFF(ebx,PD_DESCALE_P2)]

594 paddd mm5,[GOTOFF(ebx,PD_DESCALE_P2)]

595 psrad mm3,DESCALE_P2

596 psrad mm5,DESCALE_P2

597

598 packssdw mm1,mm7 ; mm1=data5

599 packssdw mm3,mm5 ; mm3=data3

600

601 movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)], mm1

602 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm3

603

604 add edx, byte 4*SIZEOF_DCTELEM

605 dec ecx

606 jnz near .columnloop

607

608 emms ; empty MMX state

609

610 ; pop edi ; unused

611 ; pop esi ; unused

612 ; pop edx ; need not be preserved

613 ; pop ecx ; need not be preserved

614 poppic ebx

615 mov esp,ebp ; esp <- aligned ebp

616 pop esp ; esp <- original ebp

617 pop ebp

618 ret

619

620 ; For some reason, the OS X linker does not honor the request to align the

621 ; segment unless we do this.

622 align 16

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