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amrwbdec_mips.c
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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: Nedeljko Babic (nbabic@mips.com)
30  *
31  * This file is part of FFmpeg.
32  *
33  * FFmpeg is free software; you can redistribute it and/or
34  * modify it under the terms of the GNU Lesser General Public
35  * License as published by the Free Software Foundation; either
36  * version 2.1 of the License, or (at your option) any later version.
37  *
38  * FFmpeg is distributed in the hope that it will be useful,
39  * but WITHOUT ANY WARRANTY; without even the implied warranty of
40  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41  * Lesser General Public License for more details.
42  *
43  * You should have received a copy of the GNU Lesser General Public
44  * License along with FFmpeg; if not, write to the Free Software
45  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
46  */
47 
48 /**
49  * @file
50  * Reference: libavcodec/amrwbdec.c
51  */
52 #include "libavutil/avutil.h"
53 #include "libavcodec/amrwbdata.h"
54 #include "amrwbdec_mips.h"
55 
56 #if HAVE_INLINE_ASM
57 void hb_fir_filter_mips(float *out, const float fir_coef[HB_FIR_SIZE + 1],
58  float mem[HB_FIR_SIZE], const float *in)
59 {
60  int i;
61  float data[AMRWB_SFR_SIZE_16k + HB_FIR_SIZE]; // past and current samples
62 
63  memcpy(data, mem, HB_FIR_SIZE * sizeof(float));
64  memcpy(data + HB_FIR_SIZE, in, AMRWB_SFR_SIZE_16k * sizeof(float));
65 
66  for (i = 0; i < AMRWB_SFR_SIZE_16k; i++) {
67  float output;
68  float * p_data = (data+i);
69 
70  /**
71  * inner loop is entirely unrolled and instructions are scheduled
72  * to minimize pipeline stall
73  */
74  __asm__ volatile(
75  "mtc1 $zero, %[output] \n\t"
76  "lwc1 $f0, 0(%[p_data]) \n\t"
77  "lwc1 $f1, 0(%[fir_coef]) \n\t"
78  "lwc1 $f2, 4(%[p_data]) \n\t"
79  "madd.s %[output], %[output], $f0, $f1 \n\t"
80  "lwc1 $f3, 4(%[fir_coef]) \n\t"
81  "lwc1 $f4, 8(%[p_data]) \n\t"
82  "madd.s %[output], %[output], $f2, $f3 \n\t"
83  "lwc1 $f5, 8(%[fir_coef]) \n\t"
84 
85  "lwc1 $f0, 12(%[p_data]) \n\t"
86  "lwc1 $f1, 12(%[fir_coef]) \n\t"
87  "madd.s %[output], %[output], $f4, $f5 \n\t"
88  "lwc1 $f2, 16(%[p_data]) \n\t"
89  "madd.s %[output], %[output], $f0, $f1 \n\t"
90  "lwc1 $f3, 16(%[fir_coef]) \n\t"
91  "lwc1 $f4, 20(%[p_data]) \n\t"
92  "lwc1 $f5, 20(%[fir_coef]) \n\t"
93  "madd.s %[output], %[output], $f2, $f3 \n\t"
94 
95  "lwc1 $f0, 24(%[p_data]) \n\t"
96  "lwc1 $f1, 24(%[fir_coef]) \n\t"
97  "lwc1 $f2, 28(%[p_data]) \n\t"
98  "madd.s %[output], %[output], $f4, $f5 \n\t"
99  "lwc1 $f3, 28(%[fir_coef]) \n\t"
100  "madd.s %[output], %[output], $f0, $f1 \n\t"
101  "lwc1 $f4, 32(%[p_data]) \n\t"
102  "madd.s %[output], %[output], $f2, $f3 \n\t"
103  "lwc1 $f5, 32(%[fir_coef]) \n\t"
104  "madd.s %[output], %[output], $f4, $f5 \n\t"
105 
106  "lwc1 $f0, 36(%[p_data]) \n\t"
107  "lwc1 $f1, 36(%[fir_coef]) \n\t"
108  "lwc1 $f2, 40(%[p_data]) \n\t"
109  "lwc1 $f3, 40(%[fir_coef]) \n\t"
110  "madd.s %[output], %[output], $f0, $f1 \n\t"
111  "lwc1 $f4, 44(%[p_data]) \n\t"
112  "lwc1 $f5, 44(%[fir_coef]) \n\t"
113  "madd.s %[output], %[output], $f2, $f3 \n\t"
114 
115  "lwc1 $f0, 48(%[p_data]) \n\t"
116  "lwc1 $f1, 48(%[fir_coef]) \n\t"
117  "lwc1 $f2, 52(%[p_data]) \n\t"
118  "madd.s %[output], %[output], $f4, $f5 \n\t"
119  "lwc1 $f3, 52(%[fir_coef]) \n\t"
120  "lwc1 $f4, 56(%[p_data]) \n\t"
121  "madd.s %[output], %[output], $f0, $f1 \n\t"
122  "lwc1 $f5, 56(%[fir_coef]) \n\t"
123  "madd.s %[output], %[output], $f2, $f3 \n\t"
124 
125  "lwc1 $f0, 60(%[p_data]) \n\t"
126  "lwc1 $f1, 60(%[fir_coef]) \n\t"
127  "lwc1 $f2, 64(%[p_data]) \n\t"
128  "madd.s %[output], %[output], $f4, $f5 \n\t"
129  "lwc1 $f3, 64(%[fir_coef]) \n\t"
130  "madd.s %[output], %[output], $f0, $f1 \n\t"
131  "lwc1 $f4, 68(%[p_data]) \n\t"
132  "madd.s %[output], %[output], $f2, $f3 \n\t"
133  "lwc1 $f5, 68(%[fir_coef]) \n\t"
134  "madd.s %[output], %[output], $f4, $f5 \n\t"
135 
136  "lwc1 $f0, 72(%[p_data]) \n\t"
137  "lwc1 $f1, 72(%[fir_coef]) \n\t"
138  "lwc1 $f2, 76(%[p_data]) \n\t"
139  "lwc1 $f3, 76(%[fir_coef]) \n\t"
140  "madd.s %[output], %[output], $f0, $f1 \n\t"
141  "lwc1 $f4, 80(%[p_data]) \n\t"
142  "lwc1 $f5, 80(%[fir_coef]) \n\t"
143  "madd.s %[output], %[output], $f2, $f3 \n\t"
144 
145  "lwc1 $f0, 84(%[p_data]) \n\t"
146  "lwc1 $f1, 84(%[fir_coef]) \n\t"
147  "lwc1 $f2, 88(%[p_data]) \n\t"
148  "madd.s %[output], %[output], $f4, $f5 \n\t"
149  "lwc1 $f3, 88(%[fir_coef]) \n\t"
150  "lwc1 $f4, 92(%[p_data]) \n\t"
151  "madd.s %[output], %[output], $f0, $f1 \n\t"
152  "lwc1 $f5, 92(%[fir_coef]) \n\t"
153  "madd.s %[output], %[output], $f2, $f3 \n\t"
154 
155  "lwc1 $f0, 96(%[p_data]) \n\t"
156  "lwc1 $f1, 96(%[fir_coef]) \n\t"
157  "lwc1 $f2, 100(%[p_data]) \n\t"
158  "madd.s %[output], %[output], $f4, $f5 \n\t"
159  "lwc1 $f3, 100(%[fir_coef]) \n\t"
160  "lwc1 $f4, 104(%[p_data]) \n\t"
161  "madd.s %[output], %[output], $f0, $f1 \n\t"
162  "lwc1 $f5, 104(%[fir_coef]) \n\t"
163  "madd.s %[output], %[output], $f2, $f3 \n\t"
164 
165  "lwc1 $f0, 108(%[p_data]) \n\t"
166  "lwc1 $f1, 108(%[fir_coef]) \n\t"
167  "madd.s %[output], %[output], $f4, $f5 \n\t"
168  "lwc1 $f2, 112(%[p_data]) \n\t"
169  "lwc1 $f3, 112(%[fir_coef]) \n\t"
170  "madd.s %[output], %[output], $f0, $f1 \n\t"
171  "lwc1 $f4, 116(%[p_data]) \n\t"
172  "lwc1 $f5, 116(%[fir_coef]) \n\t"
173  "lwc1 $f0, 120(%[p_data]) \n\t"
174  "madd.s %[output], %[output], $f2, $f3 \n\t"
175  "lwc1 $f1, 120(%[fir_coef]) \n\t"
176  "madd.s %[output], %[output], $f4, $f5 \n\t"
177  "madd.s %[output], %[output], $f0, $f1 \n\t"
178 
179  : [output]"=&f"(output)
180  : [fir_coef]"r"(fir_coef), [p_data]"r"(p_data)
181  : "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "memory"
182  );
183  out[i] = output;
184  }
185  memcpy(mem, data + AMRWB_SFR_SIZE_16k, HB_FIR_SIZE * sizeof(float));
186 }
187 #endif /* HAVE_INLINE_ASM */
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