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1 : | edgomez | 1382 | ;/************************************************************************** |
2 : | ; * | ||
3 : | ; * XVID MPEG-4 VIDEO CODEC | ||
4 : | ; * - 3dne Quantization/Dequantization - | ||
5 : | ; * | ||
6 : | ; * Copyright (C) 2002-2003 Peter Ross <pross@xvid.org> | ||
7 : | ; * 2002-2003 Michael Militzer <isibaar@xvid.org> | ||
8 : | ; * 2002-2003 Pascal Massimino <skal@planet-d.net> | ||
9 : | ; * | ||
10 : | ; * This program is free software ; you can redistribute it and/or modify | ||
11 : | ; * it under the terms of the GNU General Public License as published by | ||
12 : | ; * the Free Software Foundation ; either version 2 of the License, or | ||
13 : | ; * (at your option) any later version. | ||
14 : | ; * | ||
15 : | ; * This program is distributed in the hope that it will be useful, | ||
16 : | ; * but WITHOUT ANY WARRANTY ; without even the implied warranty of | ||
17 : | ; * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
18 : | ; * GNU General Public License for more details. | ||
19 : | ; * | ||
20 : | ; * You should have received a copy of the GNU General Public License | ||
21 : | ; * along with this program ; if not, write to the Free Software | ||
22 : | ; * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
23 : | ; * | ||
24 : | chl | 1719 | ; * $Id: quantize_mpeg_mmx.asm,v 1.7 2006-07-11 10:01:27 chl Exp $ |
25 : | edgomez | 1382 | ; * |
26 : | ; *************************************************************************/ | ||
27 : | |||
28 : | %define SATURATE | ||
29 : | |||
30 : | BITS 32 | ||
31 : | |||
32 : | %macro cglobal 1 | ||
33 : | %ifdef PREFIX | ||
34 : | edgomez | 1535 | %ifdef MARK_FUNCS |
35 : | edgomez | 1540 | global _%1:function %1.endfunc-%1 |
36 : | %define %1 _%1:function %1.endfunc-%1 | ||
37 : | edgomez | 1535 | %else |
38 : | global _%1 | ||
39 : | %define %1 _%1 | ||
40 : | %endif | ||
41 : | edgomez | 1382 | %else |
42 : | edgomez | 1535 | %ifdef MARK_FUNCS |
43 : | edgomez | 1540 | global %1:function %1.endfunc-%1 |
44 : | edgomez | 1535 | %else |
45 : | global %1 | ||
46 : | %endif | ||
47 : | edgomez | 1382 | %endif |
48 : | %endmacro | ||
49 : | |||
50 : | %macro cextern 1 | ||
51 : | %ifdef PREFIX | ||
52 : | extern _%1 | ||
53 : | %define %1 _%1 | ||
54 : | %else | ||
55 : | extern %1 | ||
56 : | %endif | ||
57 : | %endmacro | ||
58 : | |||
59 : | ;============================================================================= | ||
60 : | ; Local data (Read Only) | ||
61 : | ;============================================================================= | ||
62 : | |||
63 : | %ifdef FORMAT_COFF | ||
64 : | edgomez | 1519 | SECTION .rodata |
65 : | edgomez | 1382 | %else |
66 : | edgomez | 1519 | SECTION .rodata align=16 |
67 : | edgomez | 1382 | %endif |
68 : | |||
69 : | mmx_one: | ||
70 : | times 4 dw 1 | ||
71 : | |||
72 : | ;----------------------------------------------------------------------------- | ||
73 : | ; divide by 2Q table | ||
74 : | ;----------------------------------------------------------------------------- | ||
75 : | |||
76 : | ALIGN 16 | ||
77 : | mmx_div: | ||
78 : | times 4 dw 65535 ; the div by 2 formula will overflow for the case | ||
79 : | ; quant=1 but we don't care much because quant=1 | ||
80 : | ; is handled by a different piece of code that | ||
81 : | ; doesn't use this table. | ||
82 : | %assign quant 2 | ||
83 : | %rep 30 | ||
84 : | times 4 dw (1<<17) / (quant*2) + 1 | ||
85 : | %assign quant quant+1 | ||
86 : | %endrep | ||
87 : | |||
88 : | %define VM18P 3 | ||
89 : | %define VM18Q 4 | ||
90 : | |||
91 : | |||
92 : | ;----------------------------------------------------------------------------- | ||
93 : | ; quantd table | ||
94 : | ;----------------------------------------------------------------------------- | ||
95 : | |||
96 : | quantd: | ||
97 : | %assign quant 1 | ||
98 : | %rep 31 | ||
99 : | times 4 dw ((VM18P*quant) + (VM18Q/2)) / VM18Q | ||
100 : | %assign quant quant+1 | ||
101 : | %endrep | ||
102 : | |||
103 : | ;----------------------------------------------------------------------------- | ||
104 : | ; multiple by 2Q table | ||
105 : | ;----------------------------------------------------------------------------- | ||
106 : | |||
107 : | mmx_mul_quant: | ||
108 : | %assign quant 1 | ||
109 : | %rep 31 | ||
110 : | times 4 dw quant | ||
111 : | %assign quant quant+1 | ||
112 : | %endrep | ||
113 : | |||
114 : | ;----------------------------------------------------------------------------- | ||
115 : | ; saturation limits | ||
116 : | ;----------------------------------------------------------------------------- | ||
117 : | |||
118 : | ALIGN 16 | ||
119 : | |||
120 : | mmx_32767_minus_2047: | ||
121 : | times 4 dw (32767-2047) | ||
122 : | mmx_32768_minus_2048: | ||
123 : | times 4 dw (32768-2048) | ||
124 : | mmx_2047: | ||
125 : | times 4 dw 2047 | ||
126 : | mmx_minus_2048: | ||
127 : | times 4 dw (-2048) | ||
128 : | zero: | ||
129 : | times 4 dw 0 | ||
130 : | |||
131 : | ;============================================================================= | ||
132 : | syskin | 1713 | ; rounding |
133 : | ;============================================================================= | ||
134 : | |||
135 : | mmx_rounding: | ||
136 : | dw (1<<13) | ||
137 : | dw 0 | ||
138 : | dw (1<<13) | ||
139 : | dw 0 | ||
140 : | |||
141 : | ;============================================================================= | ||
142 : | edgomez | 1382 | ; Code |
143 : | ;============================================================================= | ||
144 : | |||
145 : | SECTION .text | ||
146 : | |||
147 : | cglobal quant_mpeg_intra_mmx | ||
148 : | cglobal quant_mpeg_inter_mmx | ||
149 : | cglobal dequant_mpeg_intra_mmx | ||
150 : | cglobal dequant_mpeg_inter_mmx | ||
151 : | |||
152 : | syskin | 1713 | |
153 : | %macro QUANT_MMX 1 | ||
154 : | movq mm0, [eax + 16*(%1)] ; data | ||
155 : | movq mm2, [ecx + 16*(%1) + 128] ; intra_matrix_rec | ||
156 : | movq mm4, [eax + 16*(%1) + 8] ; data | ||
157 : | movq mm6, [ecx + 16*(%1) + 128 + 8] ; intra_matrix_rec | ||
158 : | |||
159 : | movq mm1, mm0 | ||
160 : | movq mm5, mm4 | ||
161 : | |||
162 : | pmullw mm0, mm2 ; low results | ||
163 : | pmulhw mm1, mm2 ; high results | ||
164 : | pmullw mm4, mm6 ; low results | ||
165 : | pmulhw mm5, mm6 ; high results | ||
166 : | |||
167 : | movq mm2, mm0 | ||
168 : | movq mm6, mm4 | ||
169 : | |||
170 : | punpckhwd mm0, mm1 | ||
171 : | punpcklwd mm2, mm1 | ||
172 : | punpckhwd mm4, mm5 | ||
173 : | punpcklwd mm6, mm5 | ||
174 : | |||
175 : | paddd mm2, mm7 | ||
176 : | paddd mm0, mm7 | ||
177 : | paddd mm6, mm7 | ||
178 : | paddd mm4, mm7 | ||
179 : | |||
180 : | psrad mm2, 14 | ||
181 : | psrad mm0, 14 | ||
182 : | psrad mm6, 14 | ||
183 : | psrad mm4, 14 | ||
184 : | |||
185 : | packssdw mm2, mm0 | ||
186 : | packssdw mm6, mm4 | ||
187 : | |||
188 : | movq [edi + 16*(%1)], mm2 | ||
189 : | movq [edi + 16*(%1)+8], mm6 | ||
190 : | %endmacro | ||
191 : | |||
192 : | edgomez | 1382 | ;----------------------------------------------------------------------------- |
193 : | ; | ||
194 : | ; uint32_t quant_mpeg_intra_mmx(int16_t * coeff, | ||
195 : | ; const int16_t const * data, | ||
196 : | ; const uint32_t quant, | ||
197 : | ; const uint32_t dcscalar, | ||
198 : | ; const uint16_t *mpeg_matrices); | ||
199 : | ; | ||
200 : | ;----------------------------------------------------------------------------- | ||
201 : | |||
202 : | ALIGN 16 | ||
203 : | quant_mpeg_intra_mmx: | ||
204 : | |||
205 : | push edi | ||
206 : | syskin | 1713 | movq mm7, [mmx_rounding] |
207 : | edgomez | 1382 | |
208 : | syskin | 1713 | mov eax, [esp + 4 + 8] ; data |
209 : | mov ecx, [esp + 4 + 20] ; mpeg_quant_matrices | ||
210 : | mov edi, [esp + 4 + 4] ; coeff | ||
211 : | edgomez | 1382 | |
212 : | syskin | 1713 | QUANT_MMX(0) |
213 : | QUANT_MMX(1) | ||
214 : | QUANT_MMX(2) | ||
215 : | QUANT_MMX(3) | ||
216 : | QUANT_MMX(4) | ||
217 : | QUANT_MMX(5) | ||
218 : | QUANT_MMX(6) | ||
219 : | QUANT_MMX(7) | ||
220 : | edgomez | 1382 | |
221 : | syskin | 1713 | ; calculate DC |
222 : | movsx eax, word [eax] ; data[0] | ||
223 : | mov ecx, [esp + 4 + 16] ; dcscalar | ||
224 : | edgomez | 1382 | mov edx, ecx |
225 : | shr edx, 1 ; edx = dcscalar /2 | ||
226 : | syskin | 1713 | mov edi, edx |
227 : | neg edi | ||
228 : | |||
229 : | edgomez | 1382 | cmp eax, 0 |
230 : | syskin | 1713 | cmovg edx, edi |
231 : | edgomez | 1382 | sub eax, edx |
232 : | syskin | 1713 | |
233 : | mov edi, [esp + 4 + 4] ; coeff again | ||
234 : | |||
235 : | edgomez | 1382 | cdq ; expand eax -> edx:eax |
236 : | idiv ecx ; eax = edx:eax / dcscalar | ||
237 : | |||
238 : | mov [edi], ax ; coeff[0] = ax | ||
239 : | |||
240 : | pop edi | ||
241 : | |||
242 : | xor eax, eax ; return(0); | ||
243 : | ret | ||
244 : | chl | 1719 | .endfunc |
245 : | edgomez | 1382 | |
246 : | |||
247 : | ;----------------------------------------------------------------------------- | ||
248 : | ; | ||
249 : | ; uint32_t quant_mpeg_inter_mmx(int16_t * coeff, | ||
250 : | ; const int16_t const * data, | ||
251 : | ; const uint32_t quant, | ||
252 : | ; const uint16_t *mpeg_matrices); | ||
253 : | ; | ||
254 : | ;----------------------------------------------------------------------------- | ||
255 : | |||
256 : | ALIGN 16 | ||
257 : | quant_mpeg_inter_mmx: | ||
258 : | |||
259 : | push ecx | ||
260 : | push esi | ||
261 : | push edi | ||
262 : | push ebx | ||
263 : | |||
264 : | mov edi, [esp + 16 + 4] ; coeff | ||
265 : | mov esi, [esp + 16 + 8] ; data | ||
266 : | mov eax, [esp + 16 + 12] ; quant | ||
267 : | mov ebx, [esp + 16 + 16] ; mpeg_quant_matrices | ||
268 : | |||
269 : | xor ecx, ecx | ||
270 : | |||
271 : | pxor mm5, mm5 ; sum | ||
272 : | |||
273 : | cmp al, 1 | ||
274 : | jz near .q1loop | ||
275 : | |||
276 : | cmp al, 2 | ||
277 : | jz near .q2loop | ||
278 : | |||
279 : | movq mm7, [mmx_div + eax * 8 - 8] ; divider | ||
280 : | |||
281 : | ALIGN 16 | ||
282 : | .loop | ||
283 : | movq mm0, [esi + 8*ecx] ; mm0 = [1st] | ||
284 : | movq mm3, [esi + 8*ecx + 8] ; | ||
285 : | pxor mm1, mm1 ; mm1 = 0 | ||
286 : | pxor mm4, mm4 ; | ||
287 : | pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) | ||
288 : | pcmpgtw mm4, mm3 ; | ||
289 : | pxor mm0, mm1 ; mm0 = |mm0| | ||
290 : | pxor mm3, mm4 ; | ||
291 : | psubw mm0, mm1 ; displace | ||
292 : | psubw mm3, mm4 ; | ||
293 : | psllw mm0, 4 | ||
294 : | psllw mm3, 4 | ||
295 : | movq mm2, [ebx + 512 + 8*ecx] | ||
296 : | psrlw mm2, 1 | ||
297 : | paddw mm0, mm2 | ||
298 : | movq mm2, [ebx + 768 + ecx*8] | ||
299 : | pmulhw mm0, mm2 ; (level<<4 + inter_matrix[i]>>1) / inter_matrix[i] | ||
300 : | movq mm2, [ebx + 512 + 8*ecx + 8] | ||
301 : | psrlw mm2, 1 | ||
302 : | paddw mm3, mm2 | ||
303 : | movq mm2, [ebx + 768 + ecx*8 + 8] | ||
304 : | pmulhw mm3, mm2 | ||
305 : | pmulhw mm0, mm7 ; mm0 = (mm0 / 2Q) >> 16 | ||
306 : | pmulhw mm3, mm7 ; | ||
307 : | psrlw mm0, 1 ; additional shift by 1 => 16 + 1 = 17 | ||
308 : | psrlw mm3, 1 | ||
309 : | paddw mm5, mm0 ; sum += mm0 | ||
310 : | pxor mm0, mm1 ; mm0 *= sign(mm0) | ||
311 : | paddw mm5, mm3 ; | ||
312 : | pxor mm3, mm4 ; | ||
313 : | psubw mm0, mm1 ; undisplace | ||
314 : | psubw mm3, mm4 | ||
315 : | movq [edi + 8*ecx], mm0 | ||
316 : | movq [edi + 8*ecx + 8], mm3 | ||
317 : | |||
318 : | add ecx, 2 | ||
319 : | cmp ecx, 16 | ||
320 : | jnz near .loop | ||
321 : | |||
322 : | .done | ||
323 : | pmaddwd mm5, [mmx_one] | ||
324 : | movq mm0, mm5 | ||
325 : | psrlq mm5, 32 | ||
326 : | paddd mm0, mm5 | ||
327 : | movd eax, mm0 ; return sum | ||
328 : | |||
329 : | pop ebx | ||
330 : | pop edi | ||
331 : | pop esi | ||
332 : | pop ecx | ||
333 : | |||
334 : | ret | ||
335 : | |||
336 : | ALIGN 16 | ||
337 : | .q1loop | ||
338 : | movq mm0, [esi + 8*ecx] ; mm0 = [1st] | ||
339 : | movq mm3, [esi + 8*ecx+ 8] | ||
340 : | pxor mm1, mm1 ; mm1 = 0 | ||
341 : | pxor mm4, mm4 ; | ||
342 : | pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) | ||
343 : | pcmpgtw mm4, mm3 ; | ||
344 : | pxor mm0, mm1 ; mm0 = |mm0| | ||
345 : | pxor mm3, mm4 ; | ||
346 : | psubw mm0, mm1 ; displace | ||
347 : | psubw mm3, mm4 ; | ||
348 : | psllw mm0, 4 | ||
349 : | psllw mm3, 4 | ||
350 : | movq mm2, [ebx + 512 + 8*ecx] | ||
351 : | psrlw mm2, 1 | ||
352 : | paddw mm0, mm2 | ||
353 : | movq mm2, [ebx + 768 + ecx*8] | ||
354 : | pmulhw mm0, mm2 ; (level<<4 + inter_matrix[i]>>1) / inter_matrix[i] | ||
355 : | movq mm2, [ebx + 512 + 8*ecx + 8] | ||
356 : | psrlw mm2, 1 | ||
357 : | paddw mm3, mm2 | ||
358 : | movq mm2, [ebx + 768 + ecx*8 + 8] | ||
359 : | pmulhw mm3, mm2 | ||
360 : | psrlw mm0, 1 ; mm0 >>= 1 (/2) | ||
361 : | psrlw mm3, 1 ; | ||
362 : | paddw mm5, mm0 ; sum += mm0 | ||
363 : | pxor mm0, mm1 ; mm0 *= sign(mm0) | ||
364 : | paddw mm5, mm3 ; | ||
365 : | pxor mm3, mm4 ; | ||
366 : | psubw mm0, mm1 ; undisplace | ||
367 : | psubw mm3, mm4 | ||
368 : | movq [edi + 8*ecx], mm0 | ||
369 : | movq [edi + 8*ecx + 8], mm3 | ||
370 : | |||
371 : | add ecx, 2 | ||
372 : | cmp ecx, 16 | ||
373 : | jnz near .q1loop | ||
374 : | |||
375 : | jmp .done | ||
376 : | |||
377 : | ALIGN 16 | ||
378 : | .q2loop | ||
379 : | movq mm0, [esi + 8*ecx] ; mm0 = [1st] | ||
380 : | movq mm3, [esi + 8*ecx+ 8] | ||
381 : | pxor mm1, mm1 ; mm1 = 0 | ||
382 : | pxor mm4, mm4 ; | ||
383 : | pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) | ||
384 : | pcmpgtw mm4, mm3 ; | ||
385 : | pxor mm0, mm1 ; mm0 = |mm0| | ||
386 : | pxor mm3, mm4 ; | ||
387 : | psubw mm0, mm1 ; displace | ||
388 : | psubw mm3, mm4 ; | ||
389 : | psllw mm0, 4 | ||
390 : | psllw mm3, 4 | ||
391 : | movq mm2, [ebx + 512 + 8*ecx] | ||
392 : | psrlw mm2, 1 | ||
393 : | paddw mm0, mm2 | ||
394 : | movq mm2, [ebx + 768 + ecx*8] | ||
395 : | pmulhw mm0, mm2 ; (level<<4 + inter_matrix[i]>>1) / inter_matrix[i] | ||
396 : | movq mm2, [ebx + 512 + 8*ecx + 8] | ||
397 : | psrlw mm2, 1 | ||
398 : | paddw mm3, mm2 | ||
399 : | movq mm2, [ebx + 768 + ecx*8 + 8] | ||
400 : | pmulhw mm3, mm2 | ||
401 : | psrlw mm0, 2 ; mm0 >>= 1 (/2) | ||
402 : | psrlw mm3, 2 ; | ||
403 : | paddw mm5, mm0 ; sum += mm0 | ||
404 : | pxor mm0, mm1 ; mm0 *= sign(mm0) | ||
405 : | paddw mm5, mm3 ; | ||
406 : | pxor mm3, mm4 ; | ||
407 : | psubw mm0, mm1 ; undisplace | ||
408 : | psubw mm3, mm4 | ||
409 : | movq [edi + 8*ecx], mm0 | ||
410 : | movq [edi + 8*ecx + 8], mm3 | ||
411 : | |||
412 : | add ecx, 2 | ||
413 : | cmp ecx, 16 | ||
414 : | jnz near .q2loop | ||
415 : | |||
416 : | jmp .done | ||
417 : | edgomez | 1540 | .endfunc |
418 : | edgomez | 1382 | |
419 : | |||
420 : | ;----------------------------------------------------------------------------- | ||
421 : | ; | ||
422 : | ; uint32_t dequant_mpeg_intra_mmx(int16_t *data, | ||
423 : | ; const int16_t const *coeff, | ||
424 : | ; const uint32_t quant, | ||
425 : | ; const uint32_t dcscalar, | ||
426 : | ; const uint16_t *mpeg_matrices); | ||
427 : | ; | ||
428 : | ;----------------------------------------------------------------------------- | ||
429 : | |||
430 : | ; Note: in order to saturate 'easily', we pre-shift the quantifier | ||
431 : | ; by 4. Then, the high-word of (coeff[]*matrix[i]*quant) are used to | ||
432 : | ; build a saturating mask. It is non-zero only when an overflow occured. | ||
433 : | ; We thus avoid packing/unpacking toward double-word. | ||
434 : | ; Moreover, we perform the mult (matrix[i]*quant) first, instead of, e.g., | ||
435 : | ; (coeff[i]*matrix[i]). This is less prone to overflow if coeff[] are not | ||
436 : | ; checked. Input ranges are: coeff in [-127,127], inter_matrix in [1..255],a | ||
437 : | ; and quant in [1..31]. | ||
438 : | ; | ||
439 : | ; The original loop is: | ||
440 : | ; | ||
441 : | %if 0 | ||
442 : | movq mm0, [ecx+8*eax + 8*16] ; mm0 = coeff[i] | ||
443 : | pxor mm1, mm1 | ||
444 : | pcmpgtw mm1, mm0 | ||
445 : | pxor mm0, mm1 ; change sign if negative | ||
446 : | psubw mm0, mm1 ; -> mm0 = abs(coeff[i]), mm1 = sign of coeff[i] | ||
447 : | |||
448 : | movq mm2, mm7 ; mm2 = quant | ||
449 : | pmullw mm2, [ebx + 8*eax + 8*16 ] ; matrix[i]*quant. | ||
450 : | |||
451 : | movq mm6, mm2 | ||
452 : | pmulhw mm2, mm0 ; high of coeff*(matrix*quant) (should be 0 if no overflow) | ||
453 : | pmullw mm0, mm6 ; low of coeff*(matrix*quant) | ||
454 : | |||
455 : | pxor mm5, mm5 | ||
456 : | pcmpgtw mm2, mm5 ; otherflow? | ||
457 : | psrlw mm2, 5 ; =0 if no clamp, 2047 otherwise | ||
458 : | psrlw mm0, 5 | ||
459 : | paddw mm0, mm1 ; start restoring sign | ||
460 : | por mm0, mm2 ; saturate to 2047 if needed | ||
461 : | pxor mm0, mm1 ; finish negating back | ||
462 : | |||
463 : | movq [edx + 8*eax + 8*16], mm0 ; data[i] | ||
464 : | add eax, 1 | ||
465 : | %endif | ||
466 : | |||
467 : | ;******************************************************************** | ||
468 : | |||
469 : | ALIGN 16 | ||
470 : | dequant_mpeg_intra_mmx: | ||
471 : | |||
472 : | push ebx | ||
473 : | |||
474 : | mov edx, [esp + 4 + 4] ; data | ||
475 : | mov ecx, [esp + 4 + 8] ; coeff | ||
476 : | mov eax, [esp + 4 + 12] ; quant | ||
477 : | mov ebx, [esp + 4 + 20] ; mpeg_quant_matrices | ||
478 : | |||
479 : | movq mm7, [mmx_mul_quant + eax*8 - 8] | ||
480 : | mov eax, -16 ; to keep ALIGNed, we regularly process coeff[0] | ||
481 : | psllw mm7, 2 ; << 2. See comment. | ||
482 : | pxor mm6, mm6 ; this is a NOP | ||
483 : | |||
484 : | ALIGN 16 | ||
485 : | .loop | ||
486 : | movq mm0, [ecx+8*eax + 8*16] ; mm0 = c = coeff[i] | ||
487 : | movq mm3, [ecx+8*eax + 8*16 +8]; mm3 = c' = coeff[i+1] | ||
488 : | pxor mm1, mm1 | ||
489 : | pxor mm4, mm4 | ||
490 : | pcmpgtw mm1, mm0 ; mm1 = sgn(c) | ||
491 : | movq mm2, mm7 ; mm2 = quant | ||
492 : | |||
493 : | pcmpgtw mm4, mm3 ; mm4 = sgn(c') | ||
494 : | pmullw mm2, [ebx + 8*eax + 8*16 ] ; matrix[i]*quant | ||
495 : | |||
496 : | pxor mm0, mm1 ; negate if negative | ||
497 : | pxor mm3, mm4 ; negate if negative | ||
498 : | |||
499 : | psubw mm0, mm1 | ||
500 : | psubw mm3, mm4 | ||
501 : | |||
502 : | ; we're short on register, here. Poor pairing... | ||
503 : | |||
504 : | movq mm5, mm2 | ||
505 : | pmullw mm2, mm0 ; low of coeff*(matrix*quant) | ||
506 : | |||
507 : | pmulhw mm0, mm5 ; high of coeff*(matrix*quant) | ||
508 : | movq mm5, mm7 ; mm2 = quant | ||
509 : | |||
510 : | pmullw mm5, [ebx + 8*eax + 8*16 +8] ; matrix[i+1]*quant | ||
511 : | |||
512 : | movq mm6, mm5 | ||
513 : | add eax,2 ; z-flag will be tested later | ||
514 : | |||
515 : | pmullw mm6, mm3 ; low of coeff*(matrix*quant) | ||
516 : | pmulhw mm3, mm5 ; high of coeff*(matrix*quant) | ||
517 : | |||
518 : | pcmpgtw mm0, [zero] | ||
519 : | paddusw mm2, mm0 | ||
520 : | psrlw mm2, 5 | ||
521 : | |||
522 : | pcmpgtw mm3, [zero] | ||
523 : | paddusw mm6, mm3 | ||
524 : | psrlw mm6, 5 | ||
525 : | |||
526 : | pxor mm2, mm1 ; start negating back | ||
527 : | pxor mm6, mm4 ; start negating back | ||
528 : | |||
529 : | psubusw mm1, mm0 | ||
530 : | psubusw mm4, mm3 | ||
531 : | |||
532 : | psubw mm2, mm1 ; finish negating back | ||
533 : | psubw mm6, mm4 ; finish negating back | ||
534 : | |||
535 : | movq [edx + 8*eax + 8*16 -2*8 ], mm2 ; data[i] | ||
536 : | movq [edx + 8*eax + 8*16 -2*8 +8], mm6 ; data[i+1] | ||
537 : | |||
538 : | jnz near .loop | ||
539 : | |||
540 : | ; deal with DC | ||
541 : | movd mm0, [ecx] | ||
542 : | pmullw mm0, [esp + 4 + 16] ; dcscalar | ||
543 : | movq mm2, [mmx_32767_minus_2047] | ||
544 : | paddsw mm0, mm2 | ||
545 : | psubsw mm0, mm2 | ||
546 : | movq mm2, [mmx_32768_minus_2048] | ||
547 : | psubsw mm0, mm2 | ||
548 : | paddsw mm0, mm2 | ||
549 : | movd eax, mm0 | ||
550 : | mov [edx], ax | ||
551 : | |||
552 : | xor eax, eax | ||
553 : | |||
554 : | pop ebx | ||
555 : | |||
556 : | ret | ||
557 : | edgomez | 1540 | .endfunc |
558 : | edgomez | 1382 | |
559 : | ;----------------------------------------------------------------------------- | ||
560 : | ; | ||
561 : | ; uint32_t dequant_mpeg_inter_mmx(int16_t * data, | ||
562 : | ; const int16_t * const coeff, | ||
563 : | ; const uint32_t quant, | ||
564 : | ; const uint16_t *mpeg_matrices); | ||
565 : | ; | ||
566 : | ;----------------------------------------------------------------------------- | ||
567 : | |||
568 : | ; Note: We use (2*c + sgn(c) - sgn(-c)) as multiplier | ||
569 : | ; so we handle the 3 cases: c<0, c==0, and c>0 in one shot. | ||
570 : | ; sgn(x) is the result of 'pcmpgtw 0,x': 0 if x>=0, -1 if x<0. | ||
571 : | ; It's mixed with the extraction of the absolute value. | ||
572 : | |||
573 : | ALIGN 16 | ||
574 : | dequant_mpeg_inter_mmx: | ||
575 : | |||
576 : | push ebx | ||
577 : | |||
578 : | mov edx, [esp + 4 + 4] ; data | ||
579 : | mov ecx, [esp + 4 + 8] ; coeff | ||
580 : | mov eax, [esp + 4 + 12] ; quant | ||
581 : | mov ebx, [esp + 4 + 16] ; mpeg_quant_matrices | ||
582 : | |||
583 : | movq mm7, [mmx_mul_quant + eax*8 - 8] | ||
584 : | mov eax, -16 | ||
585 : | paddw mm7, mm7 ; << 1 | ||
586 : | pxor mm6, mm6 ; mismatch sum | ||
587 : | |||
588 : | ALIGN 16 | ||
589 : | .loop | ||
590 : | movq mm0, [ecx+8*eax + 8*16 ] ; mm0 = coeff[i] | ||
591 : | movq mm2, [ecx+8*eax + 8*16 +8] ; mm2 = coeff[i+1] | ||
592 : | add eax, 2 | ||
593 : | |||
594 : | pxor mm1, mm1 | ||
595 : | pxor mm3, mm3 | ||
596 : | pcmpgtw mm1, mm0 ; mm1 = sgn(c) (preserved) | ||
597 : | pcmpgtw mm3, mm2 ; mm3 = sgn(c') (preserved) | ||
598 : | paddsw mm0, mm1 ; c += sgn(c) | ||
599 : | paddsw mm2, mm3 ; c += sgn(c') | ||
600 : | paddw mm0, mm0 ; c *= 2 | ||
601 : | paddw mm2, mm2 ; c'*= 2 | ||
602 : | |||
603 : | pxor mm4, mm4 | ||
604 : | pxor mm5, mm5 | ||
605 : | psubw mm4, mm0 ; -c | ||
606 : | psubw mm5, mm2 ; -c' | ||
607 : | psraw mm4, 16 ; mm4 = sgn(-c) | ||
608 : | psraw mm5, 16 ; mm5 = sgn(-c') | ||
609 : | psubsw mm0, mm4 ; c -= sgn(-c) | ||
610 : | psubsw mm2, mm5 ; c' -= sgn(-c') | ||
611 : | pxor mm0, mm1 ; finish changing sign if needed | ||
612 : | pxor mm2, mm3 ; finish changing sign if needed | ||
613 : | |||
614 : | ; we're short on register, here. Poor pairing... | ||
615 : | |||
616 : | movq mm4, mm7 ; (matrix*quant) | ||
617 : | pmullw mm4, [ebx + 512 + 8*eax + 8*16 -2*8] | ||
618 : | movq mm5, mm4 | ||
619 : | pmulhw mm5, mm0 ; high of c*(matrix*quant) | ||
620 : | pmullw mm0, mm4 ; low of c*(matrix*quant) | ||
621 : | |||
622 : | movq mm4, mm7 ; (matrix*quant) | ||
623 : | pmullw mm4, [ebx + 512 + 8*eax + 8*16 -2*8 + 8] | ||
624 : | |||
625 : | pcmpgtw mm5, [zero] | ||
626 : | paddusw mm0, mm5 | ||
627 : | psrlw mm0, 5 | ||
628 : | pxor mm0, mm1 ; start restoring sign | ||
629 : | psubusw mm1, mm5 | ||
630 : | |||
631 : | movq mm5, mm4 | ||
632 : | pmulhw mm5, mm2 ; high of c*(matrix*quant) | ||
633 : | pmullw mm2, mm4 ; low of c*(matrix*quant) | ||
634 : | psubw mm0, mm1 ; finish restoring sign | ||
635 : | |||
636 : | pcmpgtw mm5, [zero] | ||
637 : | paddusw mm2, mm5 | ||
638 : | psrlw mm2, 5 | ||
639 : | pxor mm2, mm3 ; start restoring sign | ||
640 : | psubusw mm3, mm5 | ||
641 : | psubw mm2, mm3 ; finish restoring sign | ||
642 : | |||
643 : | pxor mm6, mm0 ; mismatch control | ||
644 : | movq [edx + 8*eax + 8*16 -2*8 ], mm0 ; data[i] | ||
645 : | pxor mm6, mm2 ; mismatch control | ||
646 : | movq [edx + 8*eax + 8*16 -2*8 +8], mm2 ; data[i+1] | ||
647 : | |||
648 : | jnz near .loop | ||
649 : | |||
650 : | ; mismatch control | ||
651 : | |||
652 : | movq mm0, mm6 | ||
653 : | psrlq mm0, 48 | ||
654 : | movq mm1, mm6 | ||
655 : | movq mm2, mm6 | ||
656 : | psrlq mm1, 32 | ||
657 : | pxor mm6, mm0 | ||
658 : | psrlq mm2, 16 | ||
659 : | pxor mm6, mm1 | ||
660 : | pxor mm6, mm2 | ||
661 : | movd eax, mm6 | ||
662 : | and eax, 1 | ||
663 : | xor eax, 1 | ||
664 : | xor word [edx + 2*63], ax | ||
665 : | |||
666 : | xor eax, eax | ||
667 : | |||
668 : | pop ebx | ||
669 : | |||
670 : | ret | ||
671 : | edgomez | 1540 | .endfunc |
672 : |
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