1 ///****************************************************************************
3 // * XVID MPEG-4 VIDEO CODEC
4 // * - MMX and XMM forward discrete cosine transform -
6 // * Copyright(C) 2001 Peter Ross <pross@xvid.org>
8 // * This program is free software; you can redistribute it and/or modify it
9 // * under the terms of the GNU General Public License as published by
10 // * the Free Software Foundation; either version 2 of the License, or
11 // * (at your option) any later version.
13 // * This program is distributed in the hope that it will be useful,
14 // * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // * GNU General Public License for more details.
18 // * You should have received a copy of the GNU General Public License
19 // * along with this program; if not, write to the Free Software Foundation,
20 // * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 // ***************************************************************************/
27 // ****************************************************************************
29 // Originally provided by Intel at AP-922
30 // http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
31 // (See more app notes at http://developer.intel.com/vtune/cbts/strmsimd/appnotes.htm)
32 // but in a limited edition.
33 // New macro implements a column part for precise iDCT
34 // The routine precision now satisfies IEEE standard 1180-1990.
36 // Copyright(C) 2000-2001 Peter Gubanov <peter@elecard.net.ru>
37 // Rounding trick Copyright(C) 2000 Michel Lespinasse <walken@zoy.org>
39 // http://www.elecard.com/peter/idct.html
40 // http://www.linuxvideo.org/mpeg2dec/
42 // ***************************************************************************/
44 // These examples contain code fragments for first stage iDCT 8x8
45 // (for rows) and first stage DCT 8x8 (for columns)
48 // conversion to gcc syntax by michael niedermayer
52 #include "../avcodec.h"
54 //=============================================================================
55 // Macros and other preprocessor constants
56 //=============================================================================
58 #define BITS_INV_ACC 5 // 4 or 5 for IEEE
59 #define SHIFT_INV_ROW (16 - BITS_INV_ACC) //11
60 #define SHIFT_INV_COL (1 + BITS_INV_ACC) //6
61 #define RND_INV_ROW (1024 * (6 - BITS_INV_ACC))
62 #define RND_INV_COL (16 * (BITS_INV_ACC - 3))
63 #define RND_INV_CORR (RND_INV_COL - 1)
65 #define BITS_FRW_ACC 3 // 2 or 3 for accuracy
66 #define SHIFT_FRW_COL BITS_FRW_ACC
67 #define SHIFT_FRW_ROW (BITS_FRW_ACC + 17)
68 #define RND_FRW_ROW (262144*(BITS_FRW_ACC - 1))
71 //-----------------------------------------------------------------------------
72 // Various memory constants (trigonometric values or rounding values)
73 //-----------------------------------------------------------------------------
76 static const int16_t tg_1_16[4*4] attribute_used __attribute__ ((aligned(8))) = {
77 13036,13036,13036,13036, // tg * (2<<16) + 0.5
78 27146,27146,27146,27146, // tg * (2<<16) + 0.5
79 -21746,-21746,-21746,-21746, // tg * (2<<16) + 0.5
80 23170,23170,23170,23170}; // cos * (2<<15) + 0.5
82 static const int32_t rounder_0[2*8] attribute_used __attribute__ ((aligned(8))) = {
92 //-----------------------------------------------------------------------------
94 // The first stage iDCT 8x8 - inverse DCTs of rows
96 //-----------------------------------------------------------------------------
97 // The 8-point inverse DCT direct algorithm
98 //-----------------------------------------------------------------------------
100 // static const short w[32] = {
101 // FIX(cos_4_16), FIX(cos_2_16), FIX(cos_4_16), FIX(cos_6_16),
102 // FIX(cos_4_16), FIX(cos_6_16), -FIX(cos_4_16), -FIX(cos_2_16),
103 // FIX(cos_4_16), -FIX(cos_6_16), -FIX(cos_4_16), FIX(cos_2_16),
104 // FIX(cos_4_16), -FIX(cos_2_16), FIX(cos_4_16), -FIX(cos_6_16),
105 // FIX(cos_1_16), FIX(cos_3_16), FIX(cos_5_16), FIX(cos_7_16),
106 // FIX(cos_3_16), -FIX(cos_7_16), -FIX(cos_1_16), -FIX(cos_5_16),
107 // FIX(cos_5_16), -FIX(cos_1_16), FIX(cos_7_16), FIX(cos_3_16),
108 // FIX(cos_7_16), -FIX(cos_5_16), FIX(cos_3_16), -FIX(cos_1_16) };
110 // #define DCT_8_INV_ROW(x, y)
112 // int a0, a1, a2, a3, b0, b1, b2, b3;
114 // a0 =x[0]*w[0]+x[2]*w[1]+x[4]*w[2]+x[6]*w[3];
115 // a1 =x[0]*w[4]+x[2]*w[5]+x[4]*w[6]+x[6]*w[7];
116 // a2 = x[0] * w[ 8] + x[2] * w[ 9] + x[4] * w[10] + x[6] * w[11];
117 // a3 = x[0] * w[12] + x[2] * w[13] + x[4] * w[14] + x[6] * w[15];
118 // b0 = x[1] * w[16] + x[3] * w[17] + x[5] * w[18] + x[7] * w[19];
119 // b1 = x[1] * w[20] + x[3] * w[21] + x[5] * w[22] + x[7] * w[23];
120 // b2 = x[1] * w[24] + x[3] * w[25] + x[5] * w[26] + x[7] * w[27];
121 // b3 = x[1] * w[28] + x[3] * w[29] + x[5] * w[30] + x[7] * w[31];
123 // y[0] = SHIFT_ROUND ( a0 + b0 );
124 // y[1] = SHIFT_ROUND ( a1 + b1 );
125 // y[2] = SHIFT_ROUND ( a2 + b2 );
126 // y[3] = SHIFT_ROUND ( a3 + b3 );
127 // y[4] = SHIFT_ROUND ( a3 - b3 );
128 // y[5] = SHIFT_ROUND ( a2 - b2 );
129 // y[6] = SHIFT_ROUND ( a1 - b1 );
130 // y[7] = SHIFT_ROUND ( a0 - b0 );
133 //-----------------------------------------------------------------------------
135 // In this implementation the outputs of the iDCT-1D are multiplied
136 // for rows 0,4 - by cos_4_16,
137 // for rows 1,7 - by cos_1_16,
138 // for rows 2,6 - by cos_2_16,
139 // for rows 3,5 - by cos_3_16
140 // and are shifted to the left for better accuracy
142 // For the constants used,
143 // FIX(float_const) = (short) (float_const * (1<<15) + 0.5)
145 //-----------------------------------------------------------------------------
147 //-----------------------------------------------------------------------------
148 // Tables for mmx processors
149 //-----------------------------------------------------------------------------
151 // Table for rows 0,4 - constants are multiplied by cos_4_16
152 static const int16_t tab_i_04_mmx[32*4] attribute_used __attribute__ ((aligned(8))) = {
153 16384,16384,16384,-16384, // movq-> w06 w04 w02 w00
154 21407,8867,8867,-21407, // w07 w05 w03 w01
155 16384,-16384,16384,16384, // w14 w12 w10 w08
156 -8867,21407,-21407,-8867, // w15 w13 w11 w09
157 22725,12873,19266,-22725, // w22 w20 w18 w16
158 19266,4520,-4520,-12873, // w23 w21 w19 w17
159 12873,4520,4520,19266, // w30 w28 w26 w24
160 -22725,19266,-12873,-22725, // w31 w29 w27 w25
161 // Table for rows 1,7 - constants are multiplied by cos_1_16
162 22725,22725,22725,-22725, // movq-> w06 w04 w02 w00
163 29692,12299,12299,-29692, // w07 w05 w03 w01
164 22725,-22725,22725,22725, // w14 w12 w10 w08
165 -12299,29692,-29692,-12299, // w15 w13 w11 w09
166 31521,17855,26722,-31521, // w22 w20 w18 w16
167 26722,6270,-6270,-17855, // w23 w21 w19 w17
168 17855,6270,6270,26722, // w30 w28 w26 w24
169 -31521,26722,-17855,-31521, // w31 w29 w27 w25
170 // Table for rows 2,6 - constants are multiplied by cos_2_16
171 21407,21407,21407,-21407, // movq-> w06 w04 w02 w00
172 27969,11585,11585,-27969, // w07 w05 w03 w01
173 21407,-21407,21407,21407, // w14 w12 w10 w08
174 -11585,27969,-27969,-11585, // w15 w13 w11 w09
175 29692,16819,25172,-29692, // w22 w20 w18 w16
176 25172,5906,-5906,-16819, // w23 w21 w19 w17
177 16819,5906,5906,25172, // w30 w28 w26 w24
178 -29692,25172,-16819,-29692, // w31 w29 w27 w25
179 // Table for rows 3,5 - constants are multiplied by cos_3_16
180 19266,19266,19266,-19266, // movq-> w06 w04 w02 w00
181 25172,10426,10426,-25172, // w07 w05 w03 w01
182 19266,-19266,19266,19266, // w14 w12 w10 w08
183 -10426,25172,-25172,-10426, // w15 w13 w11 w09
184 26722,15137,22654,-26722, // w22 w20 w18 w16
185 22654,5315,-5315,-15137, // w23 w21 w19 w17
186 15137,5315,5315,22654, // w30 w28 w26 w24
187 -26722,22654,-15137,-26722, // w31 w29 w27 w25
189 //-----------------------------------------------------------------------------
190 // Tables for xmm processors
191 //-----------------------------------------------------------------------------
193 // %3 for rows 0,4 - constants are multiplied by cos_4_16
194 static const int16_t tab_i_04_xmm[32*4] attribute_used __attribute__ ((aligned(8))) = {
195 16384,21407,16384,8867, // movq-> w05 w04 w01 w00
196 16384,8867,-16384,-21407, // w07 w06 w03 w02
197 16384,-8867,16384,-21407, // w13 w12 w09 w08
198 -16384,21407,16384,-8867, // w15 w14 w11 w10
199 22725,19266,19266,-4520, // w21 w20 w17 w16
200 12873,4520,-22725,-12873, // w23 w22 w19 w18
201 12873,-22725,4520,-12873, // w29 w28 w25 w24
202 4520,19266,19266,-22725, // w31 w30 w27 w26
203 // %3 for rows 1,7 - constants are multiplied by cos_1_16
204 22725,29692,22725,12299, // movq-> w05 w04 w01 w00
205 22725,12299,-22725,-29692, // w07 w06 w03 w02
206 22725,-12299,22725,-29692, // w13 w12 w09 w08
207 -22725,29692,22725,-12299, // w15 w14 w11 w10
208 31521,26722,26722,-6270, // w21 w20 w17 w16
209 17855,6270,-31521,-17855, // w23 w22 w19 w18
210 17855,-31521,6270,-17855, // w29 w28 w25 w24
211 6270,26722,26722,-31521, // w31 w30 w27 w26
212 // %3 for rows 2,6 - constants are multiplied by cos_2_16
213 21407,27969,21407,11585, // movq-> w05 w04 w01 w00
214 21407,11585,-21407,-27969, // w07 w06 w03 w02
215 21407,-11585,21407,-27969, // w13 w12 w09 w08
216 -21407,27969,21407,-11585, // w15 w14 w11 w10
217 29692,25172,25172,-5906, // w21 w20 w17 w16
218 16819,5906,-29692,-16819, // w23 w22 w19 w18
219 16819,-29692,5906,-16819, // w29 w28 w25 w24
220 5906,25172,25172,-29692, // w31 w30 w27 w26
221 // %3 for rows 3,5 - constants are multiplied by cos_3_16
222 19266,25172,19266,10426, // movq-> w05 w04 w01 w00
223 19266,10426,-19266,-25172, // w07 w06 w03 w02
224 19266,-10426,19266,-25172, // w13 w12 w09 w08
225 -19266,25172,19266,-10426, // w15 w14 w11 w10
226 26722,22654,22654,-5315, // w21 w20 w17 w16
227 15137,5315,-26722,-15137, // w23 w22 w19 w18
228 15137,-26722,5315,-15137, // w29 w28 w25 w24
229 5315,22654,22654,-26722, // w31 w30 w27 w26
231 //=============================================================================
232 // Helper macros for the code
233 //=============================================================================
235 //-----------------------------------------------------------------------------
236 // DCT_8_INV_ROW_MMX( INP, OUT, TABLE, ROUNDER
237 //-----------------------------------------------------------------------------
239 #define DCT_8_INV_ROW_MMX(A1,A2,A3,A4)\
240 "movq " #A1 ",%%mm0 \n\t"/* 0 ; x3 x2 x1 x0*/\
241 "movq 8+" #A1 ",%%mm1 \n\t"/* 1 ; x7 x6 x5 x4*/\
242 "movq %%mm0,%%mm2 \n\t"/* 2 ; x3 x2 x1 x0*/\
243 "movq " #A3 ",%%mm3 \n\t"/* 3 ; w06 w04 w02 w00*/\
244 "punpcklwd %%mm1,%%mm0 \n\t"/* x5 x1 x4 x0*/\
245 "movq %%mm0,%%mm5 \n\t"/* 5 ; x5 x1 x4 x0*/\
246 "punpckldq %%mm0,%%mm0 \n\t"/* x4 x0 x4 x0*/\
247 "movq 8+" #A3 ",%%mm4 \n\t"/* 4 ; w07 w05 w03 w01*/\
248 "punpckhwd %%mm1,%%mm2 \n\t"/* 1 ; x7 x3 x6 x2*/\
249 "pmaddwd %%mm0,%%mm3 \n\t"/* x4*w06+x0*w04 x4*w02+x0*w00*/\
250 "movq %%mm2,%%mm6 \n\t"/* 6 ; x7 x3 x6 x2*/\
251 "movq 32+" #A3 ",%%mm1 \n\t"/* 1 ; w22 w20 w18 w16*/\
252 "punpckldq %%mm2,%%mm2 \n\t"/* x6 x2 x6 x2*/\
253 "pmaddwd %%mm2,%%mm4 \n\t"/* x6*w07+x2*w05 x6*w03+x2*w01*/\
254 "punpckhdq %%mm5,%%mm5 \n\t"/* x5 x1 x5 x1*/\
255 "pmaddwd 16+" #A3 ",%%mm0 \n\t"/* x4*w14+x0*w12 x4*w10+x0*w08*/\
256 "punpckhdq %%mm6,%%mm6 \n\t"/* x7 x3 x7 x3*/\
257 "movq 40+" #A3 ",%%mm7 \n\t"/* 7 ; w23 w21 w19 w17*/\
258 "pmaddwd %%mm5,%%mm1 \n\t"/* x5*w22+x1*w20 x5*w18+x1*w16*/\
259 "paddd " #A4 ",%%mm3 \n\t"/* +%4*/\
260 "pmaddwd %%mm6,%%mm7 \n\t"/* x7*w23+x3*w21 x7*w19+x3*w17*/\
261 "pmaddwd 24+" #A3 ",%%mm2 \n\t"/* x6*w15+x2*w13 x6*w11+x2*w09*/\
262 "paddd %%mm4,%%mm3 \n\t"/* 4 ; a1=sum(even1) a0=sum(even0)*/\
263 "pmaddwd 48+" #A3 ",%%mm5 \n\t"/* x5*w30+x1*w28 x5*w26+x1*w24*/\
264 "movq %%mm3,%%mm4 \n\t"/* 4 ; a1 a0*/\
265 "pmaddwd 56+" #A3 ",%%mm6 \n\t"/* x7*w31+x3*w29 x7*w27+x3*w25*/\
266 "paddd %%mm7,%%mm1 \n\t"/* 7 ; b1=sum(odd1) b0=sum(odd0)*/\
267 "paddd " #A4 ",%%mm0 \n\t"/* +%4*/\
268 "psubd %%mm1,%%mm3 \n\t"/* a1-b1 a0-b0*/\
269 "psrad $11,%%mm3 \n\t"/* y6=a1-b1 y7=a0-b0*/\
270 "paddd %%mm4,%%mm1 \n\t"/* 4 ; a1+b1 a0+b0*/\
271 "paddd %%mm2,%%mm0 \n\t"/* 2 ; a3=sum(even3) a2=sum(even2)*/\
272 "psrad $11,%%mm1 \n\t"/* y1=a1+b1 y0=a0+b0*/\
273 "paddd %%mm6,%%mm5 \n\t"/* 6 ; b3=sum(odd3) b2=sum(odd2)*/\
274 "movq %%mm0,%%mm4 \n\t"/* 4 ; a3 a2*/\
275 "paddd %%mm5,%%mm0 \n\t"/* a3+b3 a2+b2*/\
276 "psubd %%mm5,%%mm4 \n\t"/* 5 ; a3-b3 a2-b2*/\
277 "psrad $11,%%mm0 \n\t"/* y3=a3+b3 y2=a2+b2*/\
278 "psrad $11,%%mm4 \n\t"/* y4=a3-b3 y5=a2-b2*/\
279 "packssdw %%mm0,%%mm1 \n\t"/* 0 ; y3 y2 y1 y0*/\
280 "packssdw %%mm3,%%mm4 \n\t"/* 3 ; y6 y7 y4 y5*/\
281 "movq %%mm4,%%mm7 \n\t"/* 7 ; y6 y7 y4 y5*/\
282 "psrld $16,%%mm4 \n\t"/* 0 y6 0 y4*/\
283 "pslld $16,%%mm7 \n\t"/* y7 0 y5 0*/\
284 "movq %%mm1," #A2 " \n\t"/* 1 ; save y3 y2 y1 y0*/\
285 "por %%mm4,%%mm7 \n\t"/* 4 ; y7 y6 y5 y4*/\
286 "movq %%mm7,8 +" #A2 "\n\t"/* 7 ; save y7 y6 y5 y4*/\
289 //-----------------------------------------------------------------------------
290 // DCT_8_INV_ROW_XMM( INP, OUT, TABLE, ROUNDER
291 //-----------------------------------------------------------------------------
293 #define DCT_8_INV_ROW_XMM(A1,A2,A3,A4)\
294 "movq " #A1 ",%%mm0 \n\t"/* 0 ; x3 x2 x1 x0*/\
295 "movq 8+" #A1 ",%%mm1 \n\t"/* 1 ; x7 x6 x5 x4*/\
296 "movq %%mm0,%%mm2 \n\t"/* 2 ; x3 x2 x1 x0*/\
297 "movq " #A3 ",%%mm3 \n\t"/* 3 ; w05 w04 w01 w00*/\
298 "pshufw $0x88,%%mm0,%%mm0 \n\t"/* x2 x0 x2 x0*/\
299 "movq 8+" #A3 ",%%mm4 \n\t"/* 4 ; w07 w06 w03 w02*/\
300 "movq %%mm1,%%mm5 \n\t"/* 5 ; x7 x6 x5 x4*/\
301 "pmaddwd %%mm0,%%mm3 \n\t"/* x2*w05+x0*w04 x2*w01+x0*w00*/\
302 "movq 32+" #A3 ",%%mm6 \n\t"/* 6 ; w21 w20 w17 w16*/\
303 "pshufw $0x88,%%mm1,%%mm1 \n\t"/* x6 x4 x6 x4*/\
304 "pmaddwd %%mm1,%%mm4 \n\t"/* x6*w07+x4*w06 x6*w03+x4*w02*/\
305 "movq 40+" #A3 ",%%mm7 \n\t"/* 7 ; w23 w22 w19 w18*/\
306 "pshufw $0xdd,%%mm2,%%mm2 \n\t"/* x3 x1 x3 x1*/\
307 "pmaddwd %%mm2,%%mm6 \n\t"/* x3*w21+x1*w20 x3*w17+x1*w16*/\
308 "pshufw $0xdd,%%mm5,%%mm5 \n\t"/* x7 x5 x7 x5*/\
309 "pmaddwd %%mm5,%%mm7 \n\t"/* x7*w23+x5*w22 x7*w19+x5*w18*/\
310 "paddd " #A4 ",%%mm3 \n\t"/* +%4*/\
311 "pmaddwd 16+" #A3 ",%%mm0 \n\t"/* x2*w13+x0*w12 x2*w09+x0*w08*/\
312 "paddd %%mm4,%%mm3 \n\t"/* 4 ; a1=sum(even1) a0=sum(even0)*/\
313 "pmaddwd 24+" #A3 ",%%mm1 \n\t"/* x6*w15+x4*w14 x6*w11+x4*w10*/\
314 "movq %%mm3,%%mm4 \n\t"/* 4 ; a1 a0*/\
315 "pmaddwd 48+" #A3 ",%%mm2 \n\t"/* x3*w29+x1*w28 x3*w25+x1*w24*/\
316 "paddd %%mm7,%%mm6 \n\t"/* 7 ; b1=sum(odd1) b0=sum(odd0)*/\
317 "pmaddwd 56+" #A3 ",%%mm5 \n\t"/* x7*w31+x5*w30 x7*w27+x5*w26*/\
318 "paddd %%mm6,%%mm3 \n\t"/* a1+b1 a0+b0*/\
319 "paddd " #A4 ",%%mm0 \n\t"/* +%4*/\
320 "psrad $11,%%mm3 \n\t"/* y1=a1+b1 y0=a0+b0*/\
321 "paddd %%mm1,%%mm0 \n\t"/* 1 ; a3=sum(even3) a2=sum(even2)*/\
322 "psubd %%mm6,%%mm4 \n\t"/* 6 ; a1-b1 a0-b0*/\
323 "movq %%mm0,%%mm7 \n\t"/* 7 ; a3 a2*/\
324 "paddd %%mm5,%%mm2 \n\t"/* 5 ; b3=sum(odd3) b2=sum(odd2)*/\
325 "paddd %%mm2,%%mm0 \n\t"/* a3+b3 a2+b2*/\
326 "psrad $11,%%mm4 \n\t"/* y6=a1-b1 y7=a0-b0*/\
327 "psubd %%mm2,%%mm7 \n\t"/* 2 ; a3-b3 a2-b2*/\
328 "psrad $11,%%mm0 \n\t"/* y3=a3+b3 y2=a2+b2*/\
329 "psrad $11,%%mm7 \n\t"/* y4=a3-b3 y5=a2-b2*/\
330 "packssdw %%mm0,%%mm3 \n\t"/* 0 ; y3 y2 y1 y0*/\
331 "packssdw %%mm4,%%mm7 \n\t"/* 4 ; y6 y7 y4 y5*/\
332 "movq %%mm3, " #A2 " \n\t"/* 3 ; save y3 y2 y1 y0*/\
333 "pshufw $0xb1,%%mm7,%%mm7 \n\t"/* y7 y6 y5 y4*/\
334 "movq %%mm7,8 +" #A2 "\n\t"/* 7 ; save y7 y6 y5 y4*/\
337 //-----------------------------------------------------------------------------
339 // The first stage DCT 8x8 - forward DCTs of columns
341 // The %2puts are multiplied
342 // for rows 0,4 - on cos_4_16,
343 // for rows 1,7 - on cos_1_16,
344 // for rows 2,6 - on cos_2_16,
345 // for rows 3,5 - on cos_3_16
346 // and are shifted to the left for rise of accuracy
348 //-----------------------------------------------------------------------------
350 // The 8-point scaled forward DCT algorithm (26a8m)
352 //-----------------------------------------------------------------------------
354 // #define DCT_8_FRW_COL(x, y)
356 // short t0, t1, t2, t3, t4, t5, t6, t7;
357 // short tp03, tm03, tp12, tm12, tp65, tm65;
358 // short tp465, tm465, tp765, tm765;
360 // t0 = LEFT_SHIFT ( x[0] + x[7] );
361 // t1 = LEFT_SHIFT ( x[1] + x[6] );
362 // t2 = LEFT_SHIFT ( x[2] + x[5] );
363 // t3 = LEFT_SHIFT ( x[3] + x[4] );
364 // t4 = LEFT_SHIFT ( x[3] - x[4] );
365 // t5 = LEFT_SHIFT ( x[2] - x[5] );
366 // t6 = LEFT_SHIFT ( x[1] - x[6] );
367 // t7 = LEFT_SHIFT ( x[0] - x[7] );
374 // y[0] = tp03 + tp12;
375 // y[4] = tp03 - tp12;
377 // y[2] = tm03 + tm12 * tg_2_16;
378 // y[6] = tm03 * tg_2_16 - tm12;
380 // tp65 =(t6 +t5 )*cos_4_16;
381 // tm65 =(t6 -t5 )*cos_4_16;
383 // tp765 = t7 + tp65;
384 // tm765 = t7 - tp65;
385 // tp465 = t4 + tm65;
386 // tm465 = t4 - tm65;
388 // y[1] = tp765 + tp465 * tg_1_16;
389 // y[7] = tp765 * tg_1_16 - tp465;
390 // y[5] = tm765 * tg_3_16 + tm465;
391 // y[3] = tm765 - tm465 * tg_3_16;
394 //-----------------------------------------------------------------------------
396 //-----------------------------------------------------------------------------
397 // DCT_8_INV_COL_4 INP,OUT
398 //-----------------------------------------------------------------------------
400 #define DCT_8_INV_COL(A1,A2)\
401 "movq 2*8(%3),%%mm0\n\t"\
402 "movq 16*3+" #A1 ",%%mm3\n\t"\
403 "movq %%mm0,%%mm1 \n\t"/* tg_3_16*/\
404 "movq 16*5+" #A1 ",%%mm5\n\t"\
405 "pmulhw %%mm3,%%mm0 \n\t"/* x3*(tg_3_16-1)*/\
406 "movq (%3),%%mm4\n\t"\
407 "pmulhw %%mm5,%%mm1 \n\t"/* x5*(tg_3_16-1)*/\
408 "movq 16*7+" #A1 ",%%mm7\n\t"\
409 "movq %%mm4,%%mm2 \n\t"/* tg_1_16*/\
410 "movq 16*1+" #A1 ",%%mm6\n\t"\
411 "pmulhw %%mm7,%%mm4 \n\t"/* x7*tg_1_16*/\
412 "paddsw %%mm3,%%mm0 \n\t"/* x3*tg_3_16*/\
413 "pmulhw %%mm6,%%mm2 \n\t"/* x1*tg_1_16*/\
414 "paddsw %%mm3,%%mm1 \n\t"/* x3+x5*(tg_3_16-1)*/\
415 "psubsw %%mm5,%%mm0 \n\t"/* x3*tg_3_16-x5 = tm35*/\
416 "movq 3*8(%3),%%mm3\n\t"\
417 "paddsw %%mm5,%%mm1 \n\t"/* x3+x5*tg_3_16 = tp35*/\
418 "paddsw %%mm6,%%mm4 \n\t"/* x1+tg_1_16*x7 = tp17*/\
419 "psubsw %%mm7,%%mm2 \n\t"/* x1*tg_1_16-x7 = tm17*/\
420 "movq %%mm4,%%mm5 \n\t"/* tp17*/\
421 "movq %%mm2,%%mm6 \n\t"/* tm17*/\
422 "paddsw %%mm1,%%mm5 \n\t"/* tp17+tp35 = b0*/\
423 "psubsw %%mm0,%%mm6 \n\t"/* tm17-tm35 = b3*/\
424 "psubsw %%mm1,%%mm4 \n\t"/* tp17-tp35 = t1*/\
425 "paddsw %%mm0,%%mm2 \n\t"/* tm17+tm35 = t2*/\
426 "movq 1*8(%3),%%mm7\n\t"\
427 "movq %%mm4,%%mm1 \n\t"/* t1*/\
428 "movq %%mm5,3*16 +" #A2 "\n\t"/* save b0*/\
429 "paddsw %%mm2,%%mm1 \n\t"/* t1+t2*/\
430 "movq %%mm6,5*16 +" #A2 "\n\t"/* save b3*/\
431 "psubsw %%mm2,%%mm4 \n\t"/* t1-t2*/\
432 "movq 2*16+" #A1 ",%%mm5\n\t"\
433 "movq %%mm7,%%mm0 \n\t"/* tg_2_16*/\
434 "movq 6*16+" #A1 ",%%mm6\n\t"\
435 "pmulhw %%mm5,%%mm0 \n\t"/* x2*tg_2_16*/\
436 "pmulhw %%mm6,%%mm7 \n\t"/* x6*tg_2_16*/\
437 "pmulhw %%mm3,%%mm1 \n\t"/* ocos_4_16*(t1+t2) = b1/2*/\
438 "movq 0*16+" #A1 ",%%mm2\n\t"\
439 "pmulhw %%mm3,%%mm4 \n\t"/* ocos_4_16*(t1-t2) = b2/2*/\
440 "psubsw %%mm6,%%mm0 \n\t"/* t2*tg_2_16-x6 = tm26*/\
441 "movq %%mm2,%%mm3 \n\t"/* x0*/\
442 "movq 4*16+" #A1 ",%%mm6\n\t"\
443 "paddsw %%mm5,%%mm7 \n\t"/* x2+x6*tg_2_16 = tp26*/\
444 "paddsw %%mm6,%%mm2 \n\t"/* x0+x4 = tp04*/\
445 "psubsw %%mm6,%%mm3 \n\t"/* x0-x4 = tm04*/\
446 "movq %%mm2,%%mm5 \n\t"/* tp04*/\
447 "movq %%mm3,%%mm6 \n\t"/* tm04*/\
448 "psubsw %%mm7,%%mm2 \n\t"/* tp04-tp26 = a3*/\
449 "paddsw %%mm0,%%mm3 \n\t"/* tm04+tm26 = a1*/\
450 "paddsw %%mm1,%%mm1 \n\t"/* b1*/\
451 "paddsw %%mm4,%%mm4 \n\t"/* b2*/\
452 "paddsw %%mm7,%%mm5 \n\t"/* tp04+tp26 = a0*/\
453 "psubsw %%mm0,%%mm6 \n\t"/* tm04-tm26 = a2*/\
454 "movq %%mm3,%%mm7 \n\t"/* a1*/\
455 "movq %%mm6,%%mm0 \n\t"/* a2*/\
456 "paddsw %%mm1,%%mm3 \n\t"/* a1+b1*/\
457 "paddsw %%mm4,%%mm6 \n\t"/* a2+b2*/\
458 "psraw $6,%%mm3 \n\t"/* dst1*/\
459 "psubsw %%mm1,%%mm7 \n\t"/* a1-b1*/\
460 "psraw $6,%%mm6 \n\t"/* dst2*/\
461 "psubsw %%mm4,%%mm0 \n\t"/* a2-b2*/\
462 "movq 3*16+" #A2 ",%%mm1 \n\t"/* load b0*/\
463 "psraw $6,%%mm7 \n\t"/* dst6*/\
464 "movq %%mm5,%%mm4 \n\t"/* a0*/\
465 "psraw $6,%%mm0 \n\t"/* dst5*/\
466 "movq %%mm3,1*16+" #A2 "\n\t"\
467 "paddsw %%mm1,%%mm5 \n\t"/* a0+b0*/\
468 "movq %%mm6,2*16+" #A2 "\n\t"\
469 "psubsw %%mm1,%%mm4 \n\t"/* a0-b0*/\
470 "movq 5*16+" #A2 ",%%mm3 \n\t"/* load b3*/\
471 "psraw $6,%%mm5 \n\t"/* dst0*/\
472 "movq %%mm2,%%mm6 \n\t"/* a3*/\
473 "psraw $6,%%mm4 \n\t"/* dst7*/\
474 "movq %%mm0,5*16+" #A2 "\n\t"\
475 "paddsw %%mm3,%%mm2 \n\t"/* a3+b3*/\
476 "movq %%mm7,6*16+" #A2 "\n\t"\
477 "psubsw %%mm3,%%mm6 \n\t"/* a3-b3*/\
478 "movq %%mm5,0*16+" #A2 "\n\t"\
479 "psraw $6,%%mm2 \n\t"/* dst3*/\
480 "movq %%mm4,7*16+" #A2 "\n\t"\
481 "psraw $6,%%mm6 \n\t"/* dst4*/\
482 "movq %%mm2,3*16+" #A2 "\n\t"\
483 "movq %%mm6,4*16+" #A2 "\n\t"
485 //=============================================================================
487 //=============================================================================
489 //-----------------------------------------------------------------------------
490 // void idct_mmx(uint16_t block[64]);
491 //-----------------------------------------------------------------------------
494 void ff_idct_xvid_mmx(short *block){
497 DCT_8_INV_ROW_MMX(0*16(%0), 0*16(%0), 64*0(%2), 8*0(%1))
498 DCT_8_INV_ROW_MMX(1*16(%0), 1*16(%0), 64*1(%2), 8*1(%1))
499 DCT_8_INV_ROW_MMX(2*16(%0), 2*16(%0), 64*2(%2), 8*2(%1))
500 DCT_8_INV_ROW_MMX(3*16(%0), 3*16(%0), 64*3(%2), 8*3(%1))
501 DCT_8_INV_ROW_MMX(4*16(%0), 4*16(%0), 64*0(%2), 8*4(%1))
502 DCT_8_INV_ROW_MMX(5*16(%0), 5*16(%0), 64*3(%2), 8*5(%1))
503 DCT_8_INV_ROW_MMX(6*16(%0), 6*16(%0), 64*2(%2), 8*6(%1))
504 DCT_8_INV_ROW_MMX(7*16(%0), 7*16(%0), 64*1(%2), 8*7(%1))
506 //# Process the columns (4 at a time)
507 DCT_8_INV_COL(0(%0), 0(%0))
508 DCT_8_INV_COL(8(%0), 8(%0))
509 :: "r"(block), "r"(rounder_0), "r"(tab_i_04_mmx), "r"(tg_1_16));
512 //-----------------------------------------------------------------------------
513 // void idct_xmm(uint16_t block[64]);
514 //-----------------------------------------------------------------------------
517 void ff_idct_xvid_mmx2(short *block){
520 DCT_8_INV_ROW_XMM(0*16(%0), 0*16(%0), 64*0(%2), 8*0(%1))
521 DCT_8_INV_ROW_XMM(1*16(%0), 1*16(%0), 64*1(%2), 8*1(%1))
522 DCT_8_INV_ROW_XMM(2*16(%0), 2*16(%0), 64*2(%2), 8*2(%1))
523 DCT_8_INV_ROW_XMM(3*16(%0), 3*16(%0), 64*3(%2), 8*3(%1))
524 DCT_8_INV_ROW_XMM(4*16(%0), 4*16(%0), 64*0(%2), 8*4(%1))
525 DCT_8_INV_ROW_XMM(5*16(%0), 5*16(%0), 64*3(%2), 8*5(%1))
526 DCT_8_INV_ROW_XMM(6*16(%0), 6*16(%0), 64*2(%2), 8*6(%1))
527 DCT_8_INV_ROW_XMM(7*16(%0), 7*16(%0), 64*1(%2), 8*7(%1))
529 //# Process the columns (4 at a time)
530 DCT_8_INV_COL(0(%0), 0(%0))
531 DCT_8_INV_COL(8(%0), 8(%0))
532 :: "r"(block), "r"(rounder_0), "r"(tab_i_04_xmm), "r"(tg_1_16));