FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
xvididct_mmx.c
Go to the documentation of this file.
1 /*
2  * XVID MPEG-4 VIDEO CODEC
3  * - MMX and XMM forward discrete cosine transform -
4  *
5  * Copyright(C) 2001 Peter Ross <pross@xvid.org>
6  *
7  * Originally provided by Intel at AP-922
8  * http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
9  * (See more app notes at http://developer.intel.com/vtune/cbts/strmsimd/appnotes.htm)
10  * but in a limited edition.
11  * New macro implements a column part for precise iDCT
12  * The routine precision now satisfies IEEE standard 1180-1990.
13  *
14  * Copyright(C) 2000-2001 Peter Gubanov <peter@elecard.net.ru>
15  * Rounding trick Copyright(C) 2000 Michel Lespinasse <walken@zoy.org>
16  *
17  * http://www.elecard.com/peter/idct.html
18  * http://www.linuxvideo.org/mpeg2dec/
19  *
20  * These examples contain code fragments for first stage iDCT 8x8
21  * (for rows) and first stage DCT 8x8 (for columns)
22  *
23  * conversion to gcc syntax by Michael Niedermayer
24  *
25  * This file is part of FFmpeg.
26  *
27  * FFmpeg is free software; you can redistribute it and/or
28  * modify it under the terms of the GNU Lesser General Public
29  * License as published by the Free Software Foundation; either
30  * version 2.1 of the License, or (at your option) any later version.
31  *
32  * FFmpeg is distributed in the hope that it will be useful,
33  * but WITHOUT ANY WARRANTY; without even the implied warranty of
34  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
35  * Lesser General Public License for more details.
36  *
37  * You should have received a copy of the GNU Lesser General Public License
38  * along with FFmpeg; if not, write to the Free Software Foundation,
39  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
40  */
41 
42 #include <inttypes.h>
43 
44 #include "config.h"
45 
46 #include "libavutil/mem.h"
47 
48 #include "libavcodec/avcodec.h"
49 #include "libavcodec/idctdsp.h"
50 
51 #include "idctdsp.h"
52 #include "xvididct.h"
53 
54 #if HAVE_MMX_INLINE
55 
56 // -----------------------------------------------------------------------------
57 // Various memory constants (trigonometric values or rounding values)
58 // -----------------------------------------------------------------------------
59 
60 DECLARE_ALIGNED(8, static const int16_t, tg_1_16)[4 * 4] = {
61  13036, 13036, 13036, 13036, // tg * (2 << 16) + 0.5
62  27146, 27146, 27146, 27146, // tg * (2 << 16) + 0.5
63  -21746, -21746, -21746, -21746, // tg * (2 << 16) + 0.5
64  23170, 23170, 23170, 23170
65 }; // cos * (2 << 15) + 0.5
66 
67 DECLARE_ALIGNED(8, static const int32_t, rounder_0)[2 * 8] = {
68  65536, 65536,
69  3597, 3597,
70  2260, 2260,
71  1203, 1203,
72  0, 0,
73  120, 120,
74  512, 512,
75  512, 512
76 };
77 
78 // -----------------------------------------------------------------------------
79 //
80 // The first stage iDCT 8x8 - inverse DCTs of rows
81 //
82 // -----------------------------------------------------------------------------
83 // The 8-point inverse DCT direct algorithm
84 // -----------------------------------------------------------------------------
85 //
86 // static const short w[32] = {
87 // FIX(cos_4_16), FIX(cos_2_16), FIX(cos_4_16), FIX(cos_6_16),
88 // FIX(cos_4_16), FIX(cos_6_16), -FIX(cos_4_16), -FIX(cos_2_16),
89 // FIX(cos_4_16), -FIX(cos_6_16), -FIX(cos_4_16), FIX(cos_2_16),
90 // FIX(cos_4_16), -FIX(cos_2_16), FIX(cos_4_16), -FIX(cos_6_16),
91 // FIX(cos_1_16), FIX(cos_3_16), FIX(cos_5_16), FIX(cos_7_16),
92 // FIX(cos_3_16), -FIX(cos_7_16), -FIX(cos_1_16), -FIX(cos_5_16),
93 // FIX(cos_5_16), -FIX(cos_1_16), FIX(cos_7_16), FIX(cos_3_16),
94 // FIX(cos_7_16), -FIX(cos_5_16), FIX(cos_3_16), -FIX(cos_1_16) };
95 //
96 // #define DCT_8_INV_ROW(x, y)
97 // {
98 // int a0, a1, a2, a3, b0, b1, b2, b3;
99 //
100 // a0 = x[0] * w[0] + x[2] * w[1] + x[4] * w[2] + x[6] * w[3];
101 // a1 = x[0] * w[4] + x[2] * w[5] + x[4] * w[6] + x[6] * w[7];
102 // a2 = x[0] * w[8] + x[2] * w[9] + x[4] * w[10] + x[6] * w[11];
103 // a3 = x[0] * w[12] + x[2] * w[13] + x[4] * w[14] + x[6] * w[15];
104 // b0 = x[1] * w[16] + x[3] * w[17] + x[5] * w[18] + x[7] * w[19];
105 // b1 = x[1] * w[20] + x[3] * w[21] + x[5] * w[22] + x[7] * w[23];
106 // b2 = x[1] * w[24] + x[3] * w[25] + x[5] * w[26] + x[7] * w[27];
107 // b3 = x[1] * w[28] + x[3] * w[29] + x[5] * w[30] + x[7] * w[31];
108 //
109 // y[0] = SHIFT_ROUND(a0 + b0);
110 // y[1] = SHIFT_ROUND(a1 + b1);
111 // y[2] = SHIFT_ROUND(a2 + b2);
112 // y[3] = SHIFT_ROUND(a3 + b3);
113 // y[4] = SHIFT_ROUND(a3 - b3);
114 // y[5] = SHIFT_ROUND(a2 - b2);
115 // y[6] = SHIFT_ROUND(a1 - b1);
116 // y[7] = SHIFT_ROUND(a0 - b0);
117 // }
118 //
119 // -----------------------------------------------------------------------------
120 //
121 // In this implementation the outputs of the iDCT-1D are multiplied
122 // for rows 0,4 - by cos_4_16,
123 // for rows 1,7 - by cos_1_16,
124 // for rows 2,6 - by cos_2_16,
125 // for rows 3,5 - by cos_3_16
126 // and are shifted to the left for better accuracy.
127 //
128 // For the constants used,
129 // FIX(float_const) = (short) (float_const * (1 << 15) + 0.5)
130 //
131 // -----------------------------------------------------------------------------
132 
133 // -----------------------------------------------------------------------------
134 // Tables for mmx processors
135 // -----------------------------------------------------------------------------
136 
137 // Table for rows 0,4 - constants are multiplied by cos_4_16
138 DECLARE_ALIGNED(8, static const int16_t, tab_i_04_mmx)[32 * 4] = {
139  16384, 16384, 16384, -16384, // movq-> w06 w04 w02 w00
140  21407, 8867, 8867, -21407, // w07 w05 w03 w01
141  16384, -16384, 16384, 16384, // w14 w12 w10 w08
142  -8867, 21407, -21407, -8867, // w15 w13 w11 w09
143  22725, 12873, 19266, -22725, // w22 w20 w18 w16
144  19266, 4520, -4520, -12873, // w23 w21 w19 w17
145  12873, 4520, 4520, 19266, // w30 w28 w26 w24
146  -22725, 19266, -12873, -22725, // w31 w29 w27 w25
147 // Table for rows 1,7 - constants are multiplied by cos_1_16
148  22725, 22725, 22725, -22725, // movq-> w06 w04 w02 w00
149  29692, 12299, 12299, -29692, // w07 w05 w03 w01
150  22725, -22725, 22725, 22725, // w14 w12 w10 w08
151  -12299, 29692, -29692, -12299, // w15 w13 w11 w09
152  31521, 17855, 26722, -31521, // w22 w20 w18 w16
153  26722, 6270, -6270, -17855, // w23 w21 w19 w17
154  17855, 6270, 6270, 26722, // w30 w28 w26 w24
155  -31521, 26722, -17855, -31521, // w31 w29 w27 w25
156 // Table for rows 2,6 - constants are multiplied by cos_2_16
157  21407, 21407, 21407, -21407, // movq-> w06 w04 w02 w00
158  27969, 11585, 11585, -27969, // w07 w05 w03 w01
159  21407, -21407, 21407, 21407, // w14 w12 w10 w08
160  -11585, 27969, -27969, -11585, // w15 w13 w11 w09
161  29692, 16819, 25172, -29692, // w22 w20 w18 w16
162  25172, 5906, -5906, -16819, // w23 w21 w19 w17
163  16819, 5906, 5906, 25172, // w30 w28 w26 w24
164  -29692, 25172, -16819, -29692, // w31 w29 w27 w25
165 // Table for rows 3,5 - constants are multiplied by cos_3_16
166  19266, 19266, 19266, -19266, // movq-> w06 w04 w02 w00
167  25172, 10426, 10426, -25172, // w07 w05 w03 w01
168  19266, -19266, 19266, 19266, // w14 w12 w10 w08
169  -10426, 25172, -25172, -10426, // w15 w13 w11 w09
170  26722, 15137, 22654, -26722, // w22 w20 w18 w16
171  22654, 5315, -5315, -15137, // w23 w21 w19 w17
172  15137, 5315, 5315, 22654, // w30 w28 w26 w24
173  -26722, 22654, -15137, -26722, // w31 w29 w27 w25
174 };
175 // -----------------------------------------------------------------------------
176 // Tables for xmm processors
177 // -----------------------------------------------------------------------------
178 
179 // %3 for rows 0,4 - constants are multiplied by cos_4_16
180 DECLARE_ALIGNED(8, static const int16_t, tab_i_04_xmm)[32 * 4] = {
181  16384, 21407, 16384, 8867, // movq-> w05 w04 w01 w00
182  16384, 8867, -16384, -21407, // w07 w06 w03 w02
183  16384, -8867, 16384, -21407, // w13 w12 w09 w08
184  -16384, 21407, 16384, -8867, // w15 w14 w11 w10
185  22725, 19266, 19266, -4520, // w21 w20 w17 w16
186  12873, 4520, -22725, -12873, // w23 w22 w19 w18
187  12873, -22725, 4520, -12873, // w29 w28 w25 w24
188  4520, 19266, 19266, -22725, // w31 w30 w27 w26
189 // %3 for rows 1,7 - constants are multiplied by cos_1_16
190  22725, 29692, 22725, 12299, // movq-> w05 w04 w01 w00
191  22725, 12299, -22725, -29692, // w07 w06 w03 w02
192  22725, -12299, 22725, -29692, // w13 w12 w09 w08
193  -22725, 29692, 22725, -12299, // w15 w14 w11 w10
194  31521, 26722, 26722, -6270, // w21 w20 w17 w16
195  17855, 6270, -31521, -17855, // w23 w22 w19 w18
196  17855, -31521, 6270, -17855, // w29 w28 w25 w24
197  6270, 26722, 26722, -31521, // w31 w30 w27 w26
198 // %3 for rows 2,6 - constants are multiplied by cos_2_16
199  21407, 27969, 21407, 11585, // movq-> w05 w04 w01 w00
200  21407, 11585, -21407, -27969, // w07 w06 w03 w02
201  21407, -11585, 21407, -27969, // w13 w12 w09 w08
202  -21407, 27969, 21407, -11585, // w15 w14 w11 w10
203  29692, 25172, 25172, -5906, // w21 w20 w17 w16
204  16819, 5906, -29692, -16819, // w23 w22 w19 w18
205  16819, -29692, 5906, -16819, // w29 w28 w25 w24
206  5906, 25172, 25172, -29692, // w31 w30 w27 w26
207 // %3 for rows 3,5 - constants are multiplied by cos_3_16
208  19266, 25172, 19266, 10426, // movq-> w05 w04 w01 w00
209  19266, 10426, -19266, -25172, // w07 w06 w03 w02
210  19266, -10426, 19266, -25172, // w13 w12 w09 w08
211  -19266, 25172, 19266, -10426, // w15 w14 w11 w10
212  26722, 22654, 22654, -5315, // w21 w20 w17 w16
213  15137, 5315, -26722, -15137, // w23 w22 w19 w18
214  15137, -26722, 5315, -15137, // w29 w28 w25 w24
215  5315, 22654, 22654, -26722, // w31 w30 w27 w26
216 };
217 // =============================================================================
218 // Helper macros for the code
219 // =============================================================================
220 
221 // -----------------------------------------------------------------------------
222 // DCT_8_INV_ROW_MMX( INP, OUT, TABLE, ROUNDER
223 // -----------------------------------------------------------------------------
224 
225 #define DCT_8_INV_ROW_MMX(A1, A2, A3, A4) \
226  "movq "#A1", %%mm0 \n\t" /* 0 ; x3 x2 x1 x0 */ \
227  "movq 8+"#A1", %%mm1 \n\t" /* 1 ; x7 x6 x5 x4 */ \
228  "movq %%mm0, %%mm2 \n\t" /* 2 ; x3 x2 x1 x0 */ \
229  "movq "#A3", %%mm3 \n\t" /* 3 ; w06 w04 w02 w00 */ \
230  "punpcklwd %%mm1, %%mm0 \n\t" /* x5 x1 x4 x0 */ \
231  "movq %%mm0, %%mm5 \n\t" /* 5 ; x5 x1 x4 x0 */ \
232  "punpckldq %%mm0, %%mm0 \n\t" /* x4 x0 x4 x0 */ \
233  "movq 8+"#A3", %%mm4 \n\t" /* 4 ; w07 w05 w03 w01 */ \
234  "punpckhwd %%mm1, %%mm2 \n\t" /* 1 ; x7 x3 x6 x2 */ \
235  "pmaddwd %%mm0, %%mm3 \n\t" /* x4*w06+x0*w04 x4*w02+x0*w00 */ \
236  "movq %%mm2, %%mm6 \n\t" /* 6 ; x7 x3 x6 x2 */ \
237  "movq 32+"#A3", %%mm1 \n\t" /* 1 ; w22 w20 w18 w16 */ \
238  "punpckldq %%mm2, %%mm2 \n\t" /* x6 x2 x6 x2 */ \
239  "pmaddwd %%mm2, %%mm4 \n\t" /* x6*w07+x2*w05 x6*w03+x2*w01 */ \
240  "punpckhdq %%mm5, %%mm5 \n\t" /* x5 x1 x5 x1 */ \
241  "pmaddwd 16+"#A3", %%mm0 \n\t" /* x4*w14+x0*w12 x4*w10+x0*w08 */ \
242  "punpckhdq %%mm6, %%mm6 \n\t" /* x7 x3 x7 x3 */ \
243  "movq 40+ "#A3", %%mm7 \n\t" /* 7 ; w23 w21 w19 w17 */ \
244  "pmaddwd %%mm5, %%mm1 \n\t" /* x5*w22+x1*w20 x5*w18+x1*w16 */ \
245  "paddd "#A4", %%mm3 \n\t" /* +%4 */ \
246  "pmaddwd %%mm6, %%mm7 \n\t" /* x7*w23+x3*w21 x7*w19+x3*w17 */ \
247  "pmaddwd 24+"#A3", %%mm2 \n\t" /* x6*w15+x2*w13 x6*w11+x2*w09 */ \
248  "paddd %%mm4, %%mm3 \n\t" /* 4 ; a1=sum(even1) a0=sum(even0) */ \
249  "pmaddwd 48+"#A3", %%mm5 \n\t" /* x5*w30+x1*w28 x5*w26+x1*w24 */ \
250  "movq %%mm3, %%mm4 \n\t" /* 4 ; a1 a0 */ \
251  "pmaddwd 56+"#A3", %%mm6 \n\t" /* x7*w31+x3*w29 x7*w27+x3*w25 */ \
252  "paddd %%mm7, %%mm1 \n\t" /* 7 ; b1=sum(odd1) b0=sum(odd0) */ \
253  "paddd "#A4", %%mm0 \n\t" /* +%4 */ \
254  "psubd %%mm1, %%mm3 \n\t" /* a1-b1 a0-b0 */ \
255  "psrad $11, %%mm3 \n\t" /* y6=a1-b1 y7=a0-b0 */ \
256  "paddd %%mm4, %%mm1 \n\t" /* 4 ; a1+b1 a0+b0 */ \
257  "paddd %%mm2, %%mm0 \n\t" /* 2 ; a3=sum(even3) a2=sum(even2) */ \
258  "psrad $11, %%mm1 \n\t" /* y1=a1+b1 y0=a0+b0 */ \
259  "paddd %%mm6, %%mm5 \n\t" /* 6 ; b3=sum(odd3) b2=sum(odd2) */ \
260  "movq %%mm0, %%mm4 \n\t" /* 4 ; a3 a2 */ \
261  "paddd %%mm5, %%mm0 \n\t" /* a3+b3 a2+b2 */ \
262  "psubd %%mm5, %%mm4 \n\t" /* 5 ; a3-b3 a2-b2 */ \
263  "psrad $11, %%mm0 \n\t" /* y3=a3+b3 y2=a2+b2 */ \
264  "psrad $11, %%mm4 \n\t" /* y4=a3-b3 y5=a2-b2 */ \
265  "packssdw %%mm0, %%mm1 \n\t" /* 0 ; y3 y2 y1 y0 */ \
266  "packssdw %%mm3, %%mm4 \n\t" /* 3 ; y6 y7 y4 y5 */ \
267  "movq %%mm4, %%mm7 \n\t" /* 7 ; y6 y7 y4 y5 */ \
268  "psrld $16, %%mm4 \n\t" /* 0 y6 0 y4 */ \
269  "pslld $16, %%mm7 \n\t" /* y7 0 y5 0 */ \
270  "movq %%mm1, "#A2" \n\t" /* 1 ; save y3 y2 y1 y0 */ \
271  "por %%mm4, %%mm7 \n\t" /* 4 ; y7 y6 y5 y4 */ \
272  "movq %%mm7, 8+"#A2" \n\t" /* 7 ; save y7 y6 y5 y4 */ \
273 
274 
275 // -----------------------------------------------------------------------------
276 // DCT_8_INV_ROW_XMM( INP, OUT, TABLE, ROUNDER
277 // -----------------------------------------------------------------------------
278 
279 #define DCT_8_INV_ROW_XMM(A1, A2, A3, A4) \
280  "movq "#A1", %%mm0 \n\t" /* 0 ; x3 x2 x1 x0 */ \
281  "movq 8+"#A1", %%mm1 \n\t" /* 1 ; x7 x6 x5 x4 */ \
282  "movq %%mm0, %%mm2 \n\t" /* 2 ; x3 x2 x1 x0 */ \
283  "movq "#A3", %%mm3 \n\t" /* 3 ; w05 w04 w01 w00 */ \
284  "pshufw $0x88, %%mm0, %%mm0 \n\t" /* x2 x0 x2 x0 */ \
285  "movq 8+"#A3", %%mm4 \n\t" /* 4 ; w07 w06 w03 w02 */ \
286  "movq %%mm1, %%mm5 \n\t" /* 5 ; x7 x6 x5 x4 */ \
287  "pmaddwd %%mm0, %%mm3 \n\t" /* x2*w05+x0*w04 x2*w01+x0*w00 */ \
288  "movq 32+"#A3", %%mm6 \n\t" /* 6 ; w21 w20 w17 w16 */ \
289  "pshufw $0x88, %%mm1, %%mm1 \n\t" /* x6 x4 x6 x4 */ \
290  "pmaddwd %%mm1, %%mm4 \n\t" /* x6*w07+x4*w06 x6*w03+x4*w02 */ \
291  "movq 40+"#A3", %%mm7 \n\t" /* 7; w23 w22 w19 w18 */ \
292  "pshufw $0xdd, %%mm2, %%mm2 \n\t" /* x3 x1 x3 x1 */ \
293  "pmaddwd %%mm2, %%mm6 \n\t" /* x3*w21+x1*w20 x3*w17+x1*w16 */ \
294  "pshufw $0xdd, %%mm5, %%mm5 \n\t" /* x7 x5 x7 x5 */ \
295  "pmaddwd %%mm5, %%mm7 \n\t" /* x7*w23+x5*w22 x7*w19+x5*w18 */ \
296  "paddd "#A4", %%mm3 \n\t" /* +%4 */ \
297  "pmaddwd 16+"#A3", %%mm0 \n\t" /* x2*w13+x0*w12 x2*w09+x0*w08 */ \
298  "paddd %%mm4, %%mm3 \n\t" /* 4 ; a1=sum(even1) a0=sum(even0) */ \
299  "pmaddwd 24+"#A3", %%mm1 \n\t" /* x6*w15+x4*w14 x6*w11+x4*w10 */ \
300  "movq %%mm3, %%mm4 \n\t" /* 4 ; a1 a0 */ \
301  "pmaddwd 48+"#A3", %%mm2 \n\t" /* x3*w29+x1*w28 x3*w25+x1*w24 */ \
302  "paddd %%mm7, %%mm6 \n\t" /* 7 ; b1=sum(odd1) b0=sum(odd0) */ \
303  "pmaddwd 56+"#A3", %%mm5 \n\t" /* x7*w31+x5*w30 x7*w27+x5*w26 */ \
304  "paddd %%mm6, %%mm3 \n\t" /* a1+b1 a0+b0 */ \
305  "paddd "#A4", %%mm0 \n\t" /* +%4 */ \
306  "psrad $11, %%mm3 \n\t" /* y1=a1+b1 y0=a0+b0 */ \
307  "paddd %%mm1, %%mm0 \n\t" /* 1 ; a3=sum(even3) a2=sum(even2) */ \
308  "psubd %%mm6, %%mm4 \n\t" /* 6 ; a1-b1 a0-b0 */ \
309  "movq %%mm0, %%mm7 \n\t" /* 7 ; a3 a2 */ \
310  "paddd %%mm5, %%mm2 \n\t" /* 5 ; b3=sum(odd3) b2=sum(odd2) */ \
311  "paddd %%mm2, %%mm0 \n\t" /* a3+b3 a2+b2 */ \
312  "psrad $11, %%mm4 \n\t" /* y6=a1-b1 y7=a0-b0 */ \
313  "psubd %%mm2, %%mm7 \n\t" /* 2 ; a3-b3 a2-b2 */ \
314  "psrad $11, %%mm0 \n\t" /* y3=a3+b3 y2=a2+b2 */ \
315  "psrad $11, %%mm7 \n\t" /* y4=a3-b3 y5=a2-b2 */ \
316  "packssdw %%mm0, %%mm3 \n\t" /* 0 ; y3 y2 y1 y0 */ \
317  "packssdw %%mm4, %%mm7 \n\t" /* 4 ; y6 y7 y4 y5 */ \
318  "movq %%mm3, "#A2" \n\t" /* 3 ; save y3 y2 y1 y0 */ \
319  "pshufw $0xb1, %%mm7, %%mm7 \n\t" /* y7 y6 y5 y4 */ \
320  "movq %%mm7, 8+"#A2" \n\t" /* 7 ; save y7 y6 y5 y4 */ \
321 
322 
323 // -----------------------------------------------------------------------------
324 //
325 // The first stage DCT 8x8 - forward DCTs of columns
326 //
327 // The %2puts are multiplied
328 // for rows 0,4 - on cos_4_16,
329 // for rows 1,7 - on cos_1_16,
330 // for rows 2,6 - on cos_2_16,
331 // for rows 3,5 - on cos_3_16
332 // and are shifted to the left for rise of accuracy
333 //
334 // -----------------------------------------------------------------------------
335 //
336 // The 8-point scaled forward DCT algorithm (26a8m)
337 //
338 // -----------------------------------------------------------------------------
339 //
340 //#define DCT_8_FRW_COL(x, y)
341 // {
342 // short t0, t1, t2, t3, t4, t5, t6, t7;
343 // short tp03, tm03, tp12, tm12, tp65, tm65;
344 // short tp465, tm465, tp765, tm765;
345 //
346 // t0 = LEFT_SHIFT(x[0] + x[7]);
347 // t1 = LEFT_SHIFT(x[1] + x[6]);
348 // t2 = LEFT_SHIFT(x[2] + x[5]);
349 // t3 = LEFT_SHIFT(x[3] + x[4]);
350 // t4 = LEFT_SHIFT(x[3] - x[4]);
351 // t5 = LEFT_SHIFT(x[2] - x[5]);
352 // t6 = LEFT_SHIFT(x[1] - x[6]);
353 // t7 = LEFT_SHIFT(x[0] - x[7]);
354 //
355 // tp03 = t0 + t3;
356 // tm03 = t0 - t3;
357 // tp12 = t1 + t2;
358 // tm12 = t1 - t2;
359 //
360 // y[0] = tp03 + tp12;
361 // y[4] = tp03 - tp12;
362 //
363 // y[2] = tm03 + tm12 * tg_2_16;
364 // y[6] = tm03 * tg_2_16 - tm12;
365 //
366 // tp65 = (t6 + t5) * cos_4_16;
367 // tm65 = (t6 - t5) * cos_4_16;
368 //
369 // tp765 = t7 + tp65;
370 // tm765 = t7 - tp65;
371 // tp465 = t4 + tm65;
372 // tm465 = t4 - tm65;
373 //
374 // y[1] = tp765 + tp465 * tg_1_16;
375 // y[7] = tp765 * tg_1_16 - tp465;
376 // y[5] = tm765 * tg_3_16 + tm465;
377 // y[3] = tm765 - tm465 * tg_3_16;
378 // }
379 //
380 // -----------------------------------------------------------------------------
381 
382 // -----------------------------------------------------------------------------
383 // DCT_8_INV_COL_4 INP,OUT
384 // -----------------------------------------------------------------------------
385 
386 #define DCT_8_INV_COL(A1, A2) \
387  "movq 2*8(%3), %%mm0 \n\t" \
388  "movq 16*3+"#A1", %%mm3 \n\t" \
389  "movq %%mm0, %%mm1 \n\t" /* tg_3_16 */ \
390  "movq 16*5+"#A1", %%mm5 \n\t" \
391  "pmulhw %%mm3, %%mm0 \n\t" /* x3*(tg_3_16-1) */ \
392  "movq (%3), %%mm4 \n\t" \
393  "pmulhw %%mm5, %%mm1 \n\t" /* x5*(tg_3_16-1) */ \
394  "movq 16*7+"#A1", %%mm7 \n\t" \
395  "movq %%mm4, %%mm2 \n\t" /* tg_1_16 */ \
396  "movq 16*1+"#A1", %%mm6 \n\t" \
397  "pmulhw %%mm7, %%mm4 \n\t" /* x7*tg_1_16 */ \
398  "paddsw %%mm3, %%mm0 \n\t" /* x3*tg_3_16 */ \
399  "pmulhw %%mm6, %%mm2 \n\t" /* x1*tg_1_16 */ \
400  "paddsw %%mm3, %%mm1 \n\t" /* x3+x5*(tg_3_16-1) */ \
401  "psubsw %%mm5, %%mm0 \n\t" /* x3*tg_3_16-x5 = tm35 */ \
402  "movq 3*8(%3), %%mm3 \n\t" \
403  "paddsw %%mm5, %%mm1 \n\t" /* x3+x5*tg_3_16 = tp35 */ \
404  "paddsw %%mm6, %%mm4 \n\t" /* x1+tg_1_16*x7 = tp17 */ \
405  "psubsw %%mm7, %%mm2 \n\t" /* x1*tg_1_16-x7 = tm17 */ \
406  "movq %%mm4, %%mm5 \n\t" /* tp17 */ \
407  "movq %%mm2, %%mm6 \n\t" /* tm17 */ \
408  "paddsw %%mm1, %%mm5 \n\t" /* tp17+tp35 = b0 */ \
409  "psubsw %%mm0, %%mm6 \n\t" /* tm17-tm35 = b3 */ \
410  "psubsw %%mm1, %%mm4 \n\t" /* tp17-tp35 = t1 */ \
411  "paddsw %%mm0, %%mm2 \n\t" /* tm17+tm35 = t2 */ \
412  "movq 1*8(%3), %%mm7 \n\t" \
413  "movq %%mm4, %%mm1 \n\t" /* t1 */ \
414  "movq %%mm5, 3*16+"#A2" \n\t" /* save b0 */ \
415  "paddsw %%mm2, %%mm1 \n\t" /* t1+t2 */ \
416  "movq %%mm6, 5*16+"#A2" \n\t" /* save b3 */ \
417  "psubsw %%mm2, %%mm4 \n\t" /* t1-t2 */ \
418  "movq 2*16+"#A1", %%mm5 \n\t" \
419  "movq %%mm7, %%mm0 \n\t" /* tg_2_16 */ \
420  "movq 6*16+"#A1", %%mm6 \n\t" \
421  "pmulhw %%mm5, %%mm0 \n\t" /* x2*tg_2_16 */ \
422  "pmulhw %%mm6, %%mm7 \n\t" /* x6*tg_2_16 */ \
423  "pmulhw %%mm3, %%mm1 \n\t" /* ocos_4_16*(t1+t2) = b1/2 */ \
424  "movq 0*16+"#A1", %%mm2 \n\t" \
425  "pmulhw %%mm3, %%mm4 \n\t" /* ocos_4_16*(t1-t2) = b2/2 */ \
426  "psubsw %%mm6, %%mm0 \n\t" /* t2*tg_2_16-x6 = tm26 */ \
427  "movq %%mm2, %%mm3 \n\t" /* x0 */ \
428  "movq 4*16+"#A1", %%mm6 \n\t" \
429  "paddsw %%mm5, %%mm7 \n\t" /* x2+x6*tg_2_16 = tp26 */ \
430  "paddsw %%mm6, %%mm2 \n\t" /* x0+x4 = tp04 */ \
431  "psubsw %%mm6, %%mm3 \n\t" /* x0-x4 = tm04 */ \
432  "movq %%mm2, %%mm5 \n\t" /* tp04 */ \
433  "movq %%mm3, %%mm6 \n\t" /* tm04 */ \
434  "psubsw %%mm7, %%mm2 \n\t" /* tp04-tp26 = a3 */ \
435  "paddsw %%mm0, %%mm3 \n\t" /* tm04+tm26 = a1 */ \
436  "paddsw %%mm1, %%mm1 \n\t" /* b1 */ \
437  "paddsw %%mm4, %%mm4 \n\t" /* b2 */ \
438  "paddsw %%mm7, %%mm5 \n\t" /* tp04+tp26 = a0 */ \
439  "psubsw %%mm0, %%mm6 \n\t" /* tm04-tm26 = a2 */ \
440  "movq %%mm3, %%mm7 \n\t" /* a1 */ \
441  "movq %%mm6, %%mm0 \n\t" /* a2 */ \
442  "paddsw %%mm1, %%mm3 \n\t" /* a1+b1 */ \
443  "paddsw %%mm4, %%mm6 \n\t" /* a2+b2 */ \
444  "psraw $6, %%mm3 \n\t" /* dst1 */ \
445  "psubsw %%mm1, %%mm7 \n\t" /* a1-b1 */ \
446  "psraw $6, %%mm6 \n\t" /* dst2 */ \
447  "psubsw %%mm4, %%mm0 \n\t" /* a2-b2 */ \
448  "movq 3*16+"#A2", %%mm1 \n\t" /* load b0 */ \
449  "psraw $6, %%mm7 \n\t" /* dst6 */ \
450  "movq %%mm5, %%mm4 \n\t" /* a0 */ \
451  "psraw $6, %%mm0 \n\t" /* dst5 */ \
452  "movq %%mm3, 1*16+"#A2" \n\t" \
453  "paddsw %%mm1, %%mm5 \n\t" /* a0+b0 */ \
454  "movq %%mm6, 2*16+"#A2" \n\t" \
455  "psubsw %%mm1, %%mm4 \n\t" /* a0-b0 */ \
456  "movq 5*16+"#A2", %%mm3 \n\t" /* load b3 */ \
457  "psraw $6, %%mm5 \n\t" /* dst0 */ \
458  "movq %%mm2, %%mm6 \n\t" /* a3 */ \
459  "psraw $6, %%mm4 \n\t" /* dst7 */ \
460  "movq %%mm0, 5*16+"#A2" \n\t" \
461  "paddsw %%mm3, %%mm2 \n\t" /* a3+b3 */ \
462  "movq %%mm7, 6*16+"#A2" \n\t" \
463  "psubsw %%mm3, %%mm6 \n\t" /* a3-b3 */ \
464  "movq %%mm5, 0*16+"#A2" \n\t" \
465  "psraw $6, %%mm2 \n\t" /* dst3 */ \
466  "movq %%mm4, 7*16+"#A2" \n\t" \
467  "psraw $6, %%mm6 \n\t" /* dst4 */ \
468  "movq %%mm2, 3*16+"#A2" \n\t" \
469  "movq %%mm6, 4*16+"#A2" \n\t" \
470 
471 // =============================================================================
472 // Code
473 // =============================================================================
474 
475 // -----------------------------------------------------------------------------
476 // void idct_mmx(uint16_t block[64]);
477 // -----------------------------------------------------------------------------
478 
479 void ff_xvid_idct_mmx(short *block)
480 {
481  __asm__ volatile (
482  // # Process each row
483  DCT_8_INV_ROW_MMX(0 * 16(%0), 0 * 16(%0), 64 * 0(%2), 8 * 0(%1))
484  DCT_8_INV_ROW_MMX(1 * 16(%0), 1 * 16(%0), 64 * 1(%2), 8 * 1(%1))
485  DCT_8_INV_ROW_MMX(2 * 16(%0), 2 * 16(%0), 64 * 2(%2), 8 * 2(%1))
486  DCT_8_INV_ROW_MMX(3 * 16(%0), 3 * 16(%0), 64 * 3(%2), 8 * 3(%1))
487  DCT_8_INV_ROW_MMX(4 * 16(%0), 4 * 16(%0), 64 * 0(%2), 8 * 4(%1))
488  DCT_8_INV_ROW_MMX(5 * 16(%0), 5 * 16(%0), 64 * 3(%2), 8 * 5(%1))
489  DCT_8_INV_ROW_MMX(6 * 16(%0), 6 * 16(%0), 64 * 2(%2), 8 * 6(%1))
490  DCT_8_INV_ROW_MMX(7 * 16(%0), 7 * 16(%0), 64 * 1(%2), 8 * 7(%1))
491 
492  // # Process the columns (4 at a time)
493  DCT_8_INV_COL(0(%0), 0(%0))
494  DCT_8_INV_COL(8(%0), 8(%0))
495  :: "r" (block), "r" (rounder_0), "r" (tab_i_04_mmx), "r" (tg_1_16));
496 }
497 
498 void ff_xvid_idct_mmx_put(uint8_t *dest, int line_size, int16_t *block)
499 {
500  ff_xvid_idct_mmx(block);
501  ff_put_pixels_clamped(block, dest, line_size);
502 }
503 
504 void ff_xvid_idct_mmx_add(uint8_t *dest, int line_size, int16_t *block)
505 {
506  ff_xvid_idct_mmx(block);
507  ff_add_pixels_clamped(block, dest, line_size);
508 }
509 
510 #endif /* HAVE_MMX_INLINE */
511 
512 #if HAVE_MMXEXT_INLINE
513 
514 // -----------------------------------------------------------------------------
515 // void idct_xmm(uint16_t block[64]);
516 // -----------------------------------------------------------------------------
517 
518 void ff_xvid_idct_mmxext(short *block)
519 {
520  __asm__ volatile (
521  // # Process each row
522  DCT_8_INV_ROW_XMM(0 * 16(%0), 0 * 16(%0), 64 * 0(%2), 8 * 0(%1))
523  DCT_8_INV_ROW_XMM(1 * 16(%0), 1 * 16(%0), 64 * 1(%2), 8 * 1(%1))
524  DCT_8_INV_ROW_XMM(2 * 16(%0), 2 * 16(%0), 64 * 2(%2), 8 * 2(%1))
525  DCT_8_INV_ROW_XMM(3 * 16(%0), 3 * 16(%0), 64 * 3(%2), 8 * 3(%1))
526  DCT_8_INV_ROW_XMM(4 * 16(%0), 4 * 16(%0), 64 * 0(%2), 8 * 4(%1))
527  DCT_8_INV_ROW_XMM(5 * 16(%0), 5 * 16(%0), 64 * 3(%2), 8 * 5(%1))
528  DCT_8_INV_ROW_XMM(6 * 16(%0), 6 * 16(%0), 64 * 2(%2), 8 * 6(%1))
529  DCT_8_INV_ROW_XMM(7 * 16(%0), 7 * 16(%0), 64 * 1(%2), 8 * 7(%1))
530 
531  // # Process the columns (4 at a time)
532  DCT_8_INV_COL(0(%0), 0(%0))
533  DCT_8_INV_COL(8(%0), 8(%0))
534  :: "r" (block), "r" (rounder_0), "r" (tab_i_04_xmm), "r" (tg_1_16));
535 }
536 
537 void ff_xvid_idct_mmxext_put(uint8_t *dest, int line_size, int16_t *block)
538 {
539  ff_xvid_idct_mmxext(block);
540  ff_put_pixels_clamped(block, dest, line_size);
541 }
542 
543 void ff_xvid_idct_mmxext_add(uint8_t *dest, int line_size, int16_t *block)
544 {
545  ff_xvid_idct_mmxext(block);
546  ff_add_pixels_clamped(block, dest, line_size);
547 }
548 
549 #endif /* HAVE_MMXEXT_INLINE */
Generated on Sun Mar 8 2015 02:35:04 for FFmpeg by   doxygen 1.8.2