13684f66bbe52910d6130219959a8d9b5c7f30d1
[ffmpeg.git] / libavcodec / mips / compute_antialias_fixed.h
1 /*
2  * Copyright (c) 2012
3  *      MIPS Technologies, Inc., California.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
14  *    contributors may be used to endorse or promote products derived from
15  *    this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * Author:  Bojan Zivkovic (bojan@mips.com)
30  *
31  * Compute antialias function optimised for MIPS fixed-point architecture
32  *
33  * This file is part of FFmpeg.
34  *
35  * FFmpeg is free software; you can redistribute it and/or
36  * modify it under the terms of the GNU Lesser General Public
37  * License as published by the Free Software Foundation; either
38  * version 2.1 of the License, or (at your option) any later version.
39  *
40  * FFmpeg is distributed in the hope that it will be useful,
41  * but WITHOUT ANY WARRANTY; without even the implied warranty of
42  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
43  * Lesser General Public License for more details.
44  *
45  * You should have received a copy of the GNU Lesser General Public
46  * License along with FFmpeg; if not, write to the Free Software
47  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
48  */
49
50 /**
51  * @file
52  * Reference: libavcodec/mpegaudiodec.c
53  */
54
55 #ifndef AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H
56 #define AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H
57
58 #if HAVE_INLINE_ASM
59 static void compute_antialias_mips_fixed(MPADecodeContext *s,
60                                         GranuleDef *g)
61 {
62     int32_t *ptr, *csa;
63     int n, i;
64     int MAX_lo = 0xffffffff;
65
66     /* we antialias only "long" bands */
67     if (g->block_type == 2) {
68         if (!g->switch_point)
69             return;
70         /* XXX: check this for 8000Hz case */
71         n = 1;
72     } else {
73         n = SBLIMIT - 1;
74     }
75
76
77     ptr = g->sb_hybrid + 18;
78
79     for(i = n;i > 0;i--) {
80         int tmp0, tmp1, tmp2, tmp00, tmp11;
81         int temp_reg1, temp_reg2, temp_reg3, temp_reg4, temp_reg5, temp_reg6;
82         csa = &csa_table[0][0];
83
84         /**
85          * instructions are scheduled to minimize pipeline stall.
86          */
87         __asm__ volatile (
88             "lw   %[tmp0],      -1*4(%[ptr])                            \n\t"
89             "lw   %[tmp1],      0*4(%[ptr])                             \n\t"
90             "lw   %[temp_reg1], 0*4(%[csa])                             \n\t"
91             "lw   %[temp_reg2], 2*4(%[csa])                             \n\t"
92             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"
93             "lw   %[temp_reg3], 3*4(%[csa])                             \n\t"
94             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"
95             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"
96             "lw   %[tmp00],     -2*4(%[ptr])                            \n\t"
97             "lw   %[tmp11],     1*4(%[ptr])                             \n\t"
98             "lw   %[temp_reg4], 4*4(%[csa])                             \n\t"
99             "mtlo %[MAX_lo],    $ac0                                    \n\t"
100             "mtlo $zero,        $ac1                                    \n\t"
101             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"
102             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"
103             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"
104             "lw   %[temp_reg5], 6*4(%[csa])                             \n\t"
105             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"
106             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"
107             "mfhi %[temp_reg1], $ac0                                    \n\t"
108             "mfhi %[temp_reg2], $ac1                                    \n\t"
109             "lw   %[temp_reg6], 7*4(%[csa])                             \n\t"
110             "mtlo %[MAX_lo],    $ac2                                    \n\t"
111             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"
112             "mtlo $zero,        $ac3                                    \n\t"
113             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"
114             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"
115             "sw   %[temp_reg1], -1*4(%[ptr])                            \n\t"
116             "mfhi %[temp_reg4], $ac2                                    \n\t"
117             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"
118             "mfhi %[temp_reg5], $ac3                                    \n\t"
119             "sw   %[temp_reg2], 0*4(%[ptr])                             \n\t"
120             "lw   %[tmp0],      -3*4(%[ptr])                            \n\t"
121             "lw   %[tmp1],      2*4(%[ptr])                             \n\t"
122             "lw   %[temp_reg1], 8*4(%[csa])                             \n\t"
123             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"
124             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"
125             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"
126             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"
127             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"
128             "sw   %[temp_reg4], -2*4(%[ptr])                            \n\t"
129             "sw   %[temp_reg5], 1*4(%[ptr])                             \n\t"
130             "lw   %[temp_reg2], 10*4(%[csa])                            \n\t"
131             "mtlo %[MAX_lo],    $ac0                                    \n\t"
132             "lw   %[temp_reg3], 11*4(%[csa])                            \n\t"
133             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"
134             "mtlo $zero,        $ac1                                    \n\t"
135             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"
136             "lw   %[tmp00],     -4*4(%[ptr])                            \n\t"
137             "lw   %[tmp11],     3*4(%[ptr])                             \n\t"
138             "mfhi %[temp_reg1], $ac0                                    \n\t"
139             "lw   %[temp_reg4], 12*4(%[csa])                            \n\t"
140             "mfhi %[temp_reg2], $ac1                                    \n\t"
141             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"
142             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"
143             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"
144             "lw   %[temp_reg5], 14*4(%[csa])                            \n\t"
145             "lw   %[temp_reg6], 15*4(%[csa])                            \n\t"
146             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"
147             "mtlo %[MAX_lo],    $ac2                                    \n\t"
148             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"
149             "mtlo $zero,        $ac3                                    \n\t"
150             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"
151             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"
152             "sw   %[temp_reg1], -3*4(%[ptr])                            \n\t"
153             "mfhi %[temp_reg4], $ac2                                    \n\t"
154             "sw   %[temp_reg2], 2*4(%[ptr])                             \n\t"
155             "mfhi %[temp_reg5], $ac3                                    \n\t"
156             "lw   %[tmp0],      -5*4(%[ptr])                            \n\t"
157             "lw   %[tmp1],      4*4(%[ptr])                             \n\t"
158             "lw   %[temp_reg1], 16*4(%[csa])                            \n\t"
159             "lw   %[temp_reg2], 18*4(%[csa])                            \n\t"
160             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"
161             "lw   %[temp_reg3], 19*4(%[csa])                            \n\t"
162             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"
163             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"
164             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"
165             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"
166             "sw   %[temp_reg4], -4*4(%[ptr])                            \n\t"
167             "mtlo %[MAX_lo],    $ac0                                    \n\t"
168             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"
169             "mtlo $zero,        $ac1                                    \n\t"
170             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"
171             "sw   %[temp_reg5], 3*4(%[ptr])                             \n\t"
172             "lw   %[tmp00],     -6*4(%[ptr])                            \n\t"
173             "mfhi %[temp_reg1], $ac0                                    \n\t"
174             "lw   %[tmp11],     5*4(%[ptr])                             \n\t"
175             "mfhi %[temp_reg2], $ac1                                    \n\t"
176             "lw   %[temp_reg4], 20*4(%[csa])                            \n\t"
177             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"
178             "lw   %[temp_reg5], 22*4(%[csa])                            \n\t"
179             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"
180             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"
181             "lw   %[temp_reg6], 23*4(%[csa])                            \n\t"
182             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"
183             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"
184             "mtlo %[MAX_lo],    $ac2                                    \n\t"
185             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"
186             "mtlo $zero,        $ac3                                    \n\t"
187             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"
188             "sw   %[temp_reg1], -5*4(%[ptr])                            \n\t"
189             "sw   %[temp_reg2], 4*4(%[ptr])                             \n\t"
190             "mfhi %[temp_reg4], $ac2                                    \n\t"
191             "lw   %[tmp0],      -7*4(%[ptr])                            \n\t"
192             "mfhi %[temp_reg5], $ac3                                    \n\t"
193             "lw   %[tmp1],      6*4(%[ptr])                             \n\t"
194             "lw   %[temp_reg1], 24*4(%[csa])                            \n\t"
195             "lw   %[temp_reg2], 26*4(%[csa])                            \n\t"
196             "add  %[tmp2],      %[tmp0],      %[tmp1]                   \n\t"
197             "lw   %[temp_reg3], 27*4(%[csa])                            \n\t"
198             "mult $ac0,         %[tmp2],      %[temp_reg1]              \n\t"
199             "mult $ac1,         %[tmp2],      %[temp_reg1]              \n\t"
200             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"
201             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"
202             "sw   %[temp_reg4], -6*4(%[ptr])                            \n\t"
203             "mtlo %[MAX_lo],    $ac0                                    \n\t"
204             "msub $ac0,         %[tmp1],      %[temp_reg2]              \n\t"
205             "mtlo $zero,        $ac1                                    \n\t"
206             "madd $ac1,         %[tmp0],      %[temp_reg3]              \n\t"
207             "sw   %[temp_reg5], 5*4(%[ptr])                             \n\t"
208             "lw   %[tmp00],     -8*4(%[ptr])                            \n\t"
209             "mfhi %[temp_reg1], $ac0                                    \n\t"
210             "lw   %[tmp11],     7*4(%[ptr])                             \n\t"
211             "mfhi %[temp_reg2], $ac1                                    \n\t"
212             "lw   %[temp_reg4], 28*4(%[csa])                            \n\t"
213             "add  %[tmp2],      %[tmp00],     %[tmp11]                  \n\t"
214             "lw   %[temp_reg5], 30*4(%[csa])                            \n\t"
215             "mult $ac2,         %[tmp2],      %[temp_reg4]              \n\t"
216             "mult $ac3,         %[tmp2],      %[temp_reg4]              \n\t"
217             "lw   %[temp_reg6], 31*4(%[csa])                            \n\t"
218             "sll  %[temp_reg1], %[temp_reg1], 2                         \n\t"
219             "sll  %[temp_reg2], %[temp_reg2], 2                         \n\t"
220             "mtlo %[MAX_lo],    $ac2                                    \n\t"
221             "msub $ac2,         %[tmp11],     %[temp_reg5]              \n\t"
222             "mtlo $zero,        $ac3                                    \n\t"
223             "madd $ac3,         %[tmp00],     %[temp_reg6]              \n\t"
224             "sw   %[temp_reg1], -7*4(%[ptr])                            \n\t"
225             "sw   %[temp_reg2], 6*4(%[ptr])                             \n\t"
226             "mfhi %[temp_reg4], $ac2                                    \n\t"
227             "mfhi %[temp_reg5], $ac3                                    \n\t"
228             "sll  %[temp_reg4], %[temp_reg4], 2                         \n\t"
229             "sll  %[temp_reg5], %[temp_reg5], 2                         \n\t"
230             "sw   %[temp_reg4], -8*4(%[ptr])                            \n\t"
231             "sw   %[temp_reg5], 7*4(%[ptr])                             \n\t"
232
233             : [tmp0] "=&r" (tmp0), [tmp1] "=&r" (tmp1), [tmp2] "=&r" (tmp2),
234               [tmp00] "=&r" (tmp00), [tmp11] "=&r" (tmp11),
235               [temp_reg1] "=&r" (temp_reg1), [temp_reg2] "=&r" (temp_reg2),
236               [temp_reg3] "=&r" (temp_reg3), [temp_reg4] "=&r" (temp_reg4),
237               [temp_reg5] "=&r" (temp_reg5), [temp_reg6] "=&r" (temp_reg6)
238             : [csa] "r" (csa), [ptr] "r" (ptr),
239               [MAX_lo] "r" (MAX_lo)
240          );
241
242         ptr += 18;
243     }
244 }
245 #define compute_antialias compute_antialias_mips_fixed
246 #endif /* HAVE_INLINE_ASM */
247
248 #endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H */