1 /*****************************************************************************
2 * idctmmx.c : MMX IDCT module
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: idctmmx.c,v 1.20 2001/11/28 15:08:05 massiot Exp $
7 * Authors: Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
8 * Michel Lespinasse <walken@zoy.org>
9 * Peter Gubanov <peter@elecard.net.ru>
10 * (from the LiViD project)
11 * Christophe Massiot <massiot@via.ecp.fr>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
26 *****************************************************************************/
28 #define MODULE_NAME idctmmx
29 #include "modules_inner.h"
31 /*****************************************************************************
33 *****************************************************************************/
44 #include "tests.h" /* TestCPU() */
49 #include "block_mmx.h"
52 #include "modules_export.h"
54 /*****************************************************************************
56 *****************************************************************************/
57 static void idct_getfunctions( function_list_t * p_function_list );
59 /*****************************************************************************
60 * Build configuration tree.
61 *****************************************************************************/
63 ADD_WINDOW( "Configuration for MMX IDCT module" )
64 ADD_COMMENT( "Ha, ha -- nothing to configure yet" )
68 p_module->i_capabilities = MODULE_CAPABILITY_NULL
69 | MODULE_CAPABILITY_IDCT;
70 p_module->psz_longname = "MMX IDCT module";
74 idct_getfunctions( &p_module->p_functions->idct );
77 MODULE_DEACTIVATE_START
78 MODULE_DEACTIVATE_STOP
80 /* Following functions are local */
82 /*****************************************************************************
83 * idct_Probe: return a preference score
84 *****************************************************************************/
85 static int idct_Probe( probedata_t *p_data )
87 if( !TestCPU( CPU_CAPABILITY_MMX ) )
92 if( TestMethod( IDCT_METHOD_VAR, "idctmmx" )
93 || TestMethod( IDCT_METHOD_VAR, "mmx" ) )
101 /*****************************************************************************
102 * NormScan : This IDCT uses reordered coeffs, so we patch the scan table
103 *****************************************************************************/
104 static void NormScan( u8 ppi_scan[2][64] )
108 for( i = 0; i < 64; i++ )
111 ppi_scan[0][i] = (j & 0x38) | ((j & 6) >> 1) | ((j & 1) << 2);
114 ppi_scan[1][i] = (j & 0x38) | ((j & 6) >> 1) | ((j & 1) << 2);
118 /*****************************************************************************
120 *****************************************************************************/
124 #define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))
125 #define rounder(bias) {round (bias), round (bias)}
127 #define table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, c4, c6, \
136 static __inline__ void RowHead( dctelem_t * row, int offset, dctelem_t * table )
138 movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
140 movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
141 movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
143 movq_m2r (*table, mm3); // mm3 = C6 C4 C2 C4
144 movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
146 punpckldq_r2r (mm0, mm0); // mm0 = x2 x0 x2 x0
148 movq_m2r (*(table+4), mm4); // mm4 = -C2 -C4 C6 C4
149 pmaddwd_r2r (mm0, mm3); // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
151 movq_m2r (*(table+8), mm1); // mm1 = -C7 C3 C3 C1
152 punpckhdq_r2r (mm2, mm2); // mm2 = x6 x4 x6 x4
155 static __inline__ void Row( dctelem_t * table, s32 * rounder )
157 pmaddwd_r2r (mm2, mm4); // mm4 = -C4*x4-C2*x6 C4*x4+C6*x6
158 punpckldq_r2r (mm5, mm5); // mm5 = x3 x1 x3 x1
160 pmaddwd_m2r (*(table+16), mm0); // mm0 = C4*x0-C2*x2 C4*x0-C6*x2
161 punpckhdq_r2r (mm6, mm6); // mm6 = x7 x5 x7 x5
163 movq_m2r (*(table+12), mm7); // mm7 = -C5 -C1 C7 C5
164 pmaddwd_r2r (mm5, mm1); // mm1 = C3*x1-C7*x3 C1*x1+C3*x3
166 paddd_m2r (*rounder, mm3); // mm3 += rounder
167 pmaddwd_r2r (mm6, mm7); // mm7 = -C1*x5-C5*x7 C5*x5+C7*x7
169 pmaddwd_m2r (*(table+20), mm2); // mm2 = C4*x4-C6*x6 -C4*x4+C2*x6
170 paddd_r2r (mm4, mm3); // mm3 = a1 a0 + rounder
172 pmaddwd_m2r (*(table+24), mm5); // mm5 = C7*x1-C5*x3 C5*x1-C1*x3
173 movq_r2r (mm3, mm4); // mm4 = a1 a0 + rounder
175 pmaddwd_m2r (*(table+28), mm6); // mm6 = C3*x5-C1*x7 C7*x5+C3*x7
176 paddd_r2r (mm7, mm1); // mm1 = b1 b0
178 paddd_m2r (*rounder, mm0); // mm0 += rounder
179 psubd_r2r (mm1, mm3); // mm3 = a1-b1 a0-b0 + rounder
181 psrad_i2r (ROW_SHIFT, mm3); // mm3 = y6 y7
182 paddd_r2r (mm4, mm1); // mm1 = a1+b1 a0+b0 + rounder
184 paddd_r2r (mm2, mm0); // mm0 = a3 a2 + rounder
185 psrad_i2r (ROW_SHIFT, mm1); // mm1 = y1 y0
187 paddd_r2r (mm6, mm5); // mm5 = b3 b2
188 movq_r2r (mm0, mm7); // mm7 = a3 a2 + rounder
190 paddd_r2r (mm5, mm0); // mm0 = a3+b3 a2+b2 + rounder
191 psubd_r2r (mm5, mm7); // mm7 = a3-b3 a2-b2 + rounder
194 static __inline__ void RowTail( dctelem_t * row, int store )
196 psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
198 psrad_i2r (ROW_SHIFT, mm7); // mm7 = y4 y5
200 packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
202 packssdw_r2r (mm3, mm7); // mm7 = y6 y7 y4 y5
204 movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
205 movq_r2r (mm7, mm4); // mm4 = y6 y7 y4 y5
207 pslld_i2r (16, mm7); // mm7 = y7 0 y5 0
209 psrld_i2r (16, mm4); // mm4 = 0 y6 0 y4
211 por_r2r (mm4, mm7); // mm7 = y7 y6 y5 y4
215 movq_r2m (mm7, *(row+store+4)); // save y7 y6 y5 y4
218 static __inline__ void RowMid( dctelem_t * row, int store,
219 int offset, dctelem_t * table )
221 movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
222 psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
224 movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
225 psrad_i2r (ROW_SHIFT, mm7); // mm7 = y4 y5
227 packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
228 movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
230 packssdw_r2r (mm3, mm7); // mm7 = y6 y7 y4 y5
231 movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
233 movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
234 movq_r2r (mm7, mm1); // mm1 = y6 y7 y4 y5
236 punpckldq_r2r (mm0, mm0); // mm0 = x2 x0 x2 x0
237 psrld_i2r (16, mm7); // mm7 = 0 y6 0 y4
239 movq_m2r (*table, mm3); // mm3 = C6 C4 C2 C4
240 pslld_i2r (16, mm1); // mm1 = y7 0 y5 0
242 movq_m2r (*(table+4), mm4); // mm4 = -C2 -C4 C6 C4
243 por_r2r (mm1, mm7); // mm7 = y7 y6 y5 y4
245 movq_m2r (*(table+8), mm1); // mm1 = -C7 C3 C3 C1
246 punpckhdq_r2r (mm2, mm2); // mm2 = x6 x4 x6 x4
248 movq_r2m (mm7, *(row+store+4)); // save y7 y6 y5 y4
249 pmaddwd_r2r (mm0, mm3); // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
252 static __inline__ void Col( dctelem_t * col, int offset )
259 static short _T1[] ATTR_ALIGN(8) = {T1,T1,T1,T1};
260 static short _T2[] ATTR_ALIGN(8) = {T2,T2,T2,T2};
261 static short _T3[] ATTR_ALIGN(8) = {T3,T3,T3,T3};
262 static short _C4[] ATTR_ALIGN(8) = {C4,C4,C4,C4};
263 static mmx_t scratch0, scratch1;
265 /* column code adapted from peter gubanov */
266 /* http://www.elecard.com/peter/idct.shtml */
268 movq_m2r (*_T1, mm0); // mm0 = T1
270 movq_m2r (*(col+offset+1*8), mm1); // mm1 = x1
271 movq_r2r (mm0, mm2); // mm2 = T1
273 movq_m2r (*(col+offset+7*8), mm4); // mm4 = x7
274 pmulhw_r2r (mm1, mm0); // mm0 = T1*x1
276 movq_m2r (*_T3, mm5); // mm5 = T3
277 pmulhw_r2r (mm4, mm2); // mm2 = T1*x7
279 movq_m2r (*(col+offset+5*8), mm6); // mm6 = x5
280 movq_r2r (mm5, mm7); // mm7 = T3-1
282 movq_m2r (*(col+offset+3*8), mm3); // mm3 = x3
283 psubsw_r2r (mm4, mm0); // mm0 = v17
285 movq_m2r (*_T2, mm4); // mm4 = T2
286 pmulhw_r2r (mm3, mm5); // mm5 = (T3-1)*x3
288 paddsw_r2r (mm2, mm1); // mm1 = u17
289 pmulhw_r2r (mm6, mm7); // mm7 = (T3-1)*x5
293 movq_r2r (mm4, mm2); // mm2 = T2
294 paddsw_r2r (mm3, mm5); // mm5 = T3*x3
296 pmulhw_m2r (*(col+offset+2*8), mm4);// mm4 = T2*x2
297 paddsw_r2r (mm6, mm7); // mm7 = T3*x5
299 psubsw_r2r (mm6, mm5); // mm5 = v35
300 paddsw_r2r (mm3, mm7); // mm7 = u35
302 movq_m2r (*(col+offset+6*8), mm3); // mm3 = x6
303 movq_r2r (mm0, mm6); // mm6 = v17
305 pmulhw_r2r (mm3, mm2); // mm2 = T2*x6
306 psubsw_r2r (mm5, mm0); // mm0 = b3
308 psubsw_r2r (mm3, mm4); // mm4 = v26
309 paddsw_r2r (mm6, mm5); // mm5 = v12
311 movq_r2m (mm0, scratch0); // save b3
312 movq_r2r (mm1, mm6); // mm6 = u17
314 paddsw_m2r (*(col+offset+2*8), mm2);// mm2 = u26
315 paddsw_r2r (mm7, mm6); // mm6 = b0
317 psubsw_r2r (mm7, mm1); // mm1 = u12
318 movq_r2r (mm1, mm7); // mm7 = u12
320 movq_m2r (*(col+offset+0*8), mm3); // mm3 = x0
321 paddsw_r2r (mm5, mm1); // mm1 = u12+v12
323 movq_m2r (*_C4, mm0); // mm0 = C4/2
324 psubsw_r2r (mm5, mm7); // mm7 = u12-v12
326 movq_r2m (mm6, scratch1); // save b0
327 pmulhw_r2r (mm0, mm1); // mm1 = b1/2
329 movq_r2r (mm4, mm6); // mm6 = v26
330 pmulhw_r2r (mm0, mm7); // mm7 = b2/2
332 movq_m2r (*(col+offset+4*8), mm5); // mm5 = x4
333 movq_r2r (mm3, mm0); // mm0 = x0
335 psubsw_r2r (mm5, mm3); // mm3 = v04
336 paddsw_r2r (mm5, mm0); // mm0 = u04
338 paddsw_r2r (mm3, mm4); // mm4 = a1
339 movq_r2r (mm0, mm5); // mm5 = u04
341 psubsw_r2r (mm6, mm3); // mm3 = a2
342 paddsw_r2r (mm2, mm5); // mm5 = a0
344 paddsw_r2r (mm1, mm1); // mm1 = b1
345 psubsw_r2r (mm2, mm0); // mm0 = a3
347 paddsw_r2r (mm7, mm7); // mm7 = b2
348 movq_r2r (mm3, mm2); // mm2 = a2
350 movq_r2r (mm4, mm6); // mm6 = a1
351 paddsw_r2r (mm7, mm3); // mm3 = a2+b2
353 psraw_i2r (COL_SHIFT, mm3); // mm3 = y2
354 paddsw_r2r (mm1, mm4); // mm4 = a1+b1
356 psraw_i2r (COL_SHIFT, mm4); // mm4 = y1
357 psubsw_r2r (mm1, mm6); // mm6 = a1-b1
359 movq_m2r (scratch1, mm1); // mm1 = b0
360 psubsw_r2r (mm7, mm2); // mm2 = a2-b2
362 psraw_i2r (COL_SHIFT, mm6); // mm6 = y6
363 movq_r2r (mm5, mm7); // mm7 = a0
365 movq_r2m (mm4, *(col+offset+1*8)); // save y1
366 psraw_i2r (COL_SHIFT, mm2); // mm2 = y5
368 movq_r2m (mm3, *(col+offset+2*8)); // save y2
369 paddsw_r2r (mm1, mm5); // mm5 = a0+b0
371 movq_m2r (scratch0, mm4); // mm4 = b3
372 psubsw_r2r (mm1, mm7); // mm7 = a0-b0
374 psraw_i2r (COL_SHIFT, mm5); // mm5 = y0
375 movq_r2r (mm0, mm3); // mm3 = a3
377 movq_r2m (mm2, *(col+offset+5*8)); // save y5
378 psubsw_r2r (mm4, mm3); // mm3 = a3-b3
380 psraw_i2r (COL_SHIFT, mm7); // mm7 = y7
381 paddsw_r2r (mm0, mm4); // mm4 = a3+b3
383 movq_r2m (mm5, *(col+offset+0*8)); // save y0
384 psraw_i2r (COL_SHIFT, mm3); // mm3 = y4
386 movq_r2m (mm6, *(col+offset+6*8)); // save y6
387 psraw_i2r (COL_SHIFT, mm4); // mm4 = y3
389 movq_r2m (mm7, *(col+offset+7*8)); // save y7
391 movq_r2m (mm3, *(col+offset+4*8)); // save y4
393 movq_r2m (mm4, *(col+offset+3*8)); // save y3
397 static s32 rounder0[] ATTR_ALIGN(8) =
398 rounder ((1 << (COL_SHIFT - 1)) - 0.5);
399 static s32 rounder4[] ATTR_ALIGN(8) = rounder (0);
400 static s32 rounder1[] ATTR_ALIGN(8) =
401 rounder (1.25683487303); // C1*(C1/C4+C1+C7)/2
402 static s32 rounder7[] ATTR_ALIGN(8) =
403 rounder (-0.25); // C1*(C7/C4+C7-C1)/2
404 static s32 rounder2[] ATTR_ALIGN(8) =
405 rounder (0.60355339059); // C2 * (C6+C2)/2
406 static s32 rounder6[] ATTR_ALIGN(8) =
407 rounder (-0.25); // C2 * (C6-C2)/2
408 static s32 rounder3[] ATTR_ALIGN(8) =
409 rounder (0.087788325588); // C3*(-C3/C4+C3+C5)/2
410 static s32 rounder5[] ATTR_ALIGN(8) =
411 rounder (-0.441341716183); // C3*(-C5/C4+C5-C3)/2
413 static void IDCT( dctelem_t * p_block )
415 static dctelem_t table04[] ATTR_ALIGN(16) =
416 table (22725, 21407, 19266, 16384, 12873, 8867, 4520);
417 static dctelem_t table17[] ATTR_ALIGN(16) =
418 table (31521, 29692, 26722, 22725, 17855, 12299, 6270);
419 static dctelem_t table26[] ATTR_ALIGN(16) =
420 table (29692, 27969, 25172, 21407, 16819, 11585, 5906);
421 static dctelem_t table35[] ATTR_ALIGN(16) =
422 table (26722, 25172, 22654, 19266, 15137, 10426, 5315);
424 RowHead( p_block, 0*8, table04 );
425 Row( table04, rounder0 );
426 RowMid( p_block, 0*8, 4*8, table04 );
427 Row( table04, rounder4 );
428 RowMid( p_block, 4*8, 1*8, table17 );
429 Row( table17, rounder1 );
430 RowMid( p_block, 1*8, 7*8, table17 );
431 Row( table17, rounder7 );
432 RowMid( p_block, 7*8, 2*8, table26 );
433 Row( table26, rounder2 );
434 RowMid( p_block, 2*8, 6*8, table26 );
435 Row( table26, rounder6 );
436 RowMid( p_block, 6*8, 3*8, table35 );
437 Row( table35, rounder3 );
438 RowMid( p_block, 3*8, 5*8, table35 );
439 Row( table35, rounder5 );
440 RowTail( p_block, 5*8);
446 #include "idct_sparse.h"
447 #include "idct_decl.h"