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acelp_vectors_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  * adaptive and fixed codebook vector operations for ACELP-based codecs
32  * optimized for MIPS
33  *
34  * This file is part of FFmpeg.
35  *
36  * FFmpeg is free software; you can redistribute it and/or
37  * modify it under the terms of the GNU Lesser General Public
38  * License as published by the Free Software Foundation; either
39  * version 2.1 of the License, or (at your option) any later version.
40  *
41  * FFmpeg is distributed in the hope that it will be useful,
42  * but WITHOUT ANY WARRANTY; without even the implied warranty of
43  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
44  * Lesser General Public License for more details.
45  *
46  * You should have received a copy of the GNU Lesser General Public
47  * License along with FFmpeg; if not, write to the Free Software
48  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
49  */
50 
51 /**
52  * @file
53  * Reference: libavcodec/acelp_vectors.c
54  */
55 #include "config.h"
57 
58 #if HAVE_INLINE_ASM
59 static void ff_weighted_vector_sumf_mips(
60  float *out, const float *in_a, const float *in_b,
61  float weight_coeff_a, float weight_coeff_b, int length)
62 {
63  const float *a_end = in_a + length;
64 
65  /* loop unrolled two times */
66  __asm__ volatile (
67  "blez %[length], ff_weighted_vector_sumf_end%= \n\t"
68 
69  "ff_weighted_vector_sumf_madd%=: \n\t"
70  "lwc1 $f0, 0(%[in_a]) \n\t"
71  "lwc1 $f3, 4(%[in_a]) \n\t"
72  "lwc1 $f1, 0(%[in_b]) \n\t"
73  "lwc1 $f4, 4(%[in_b]) \n\t"
74  "mul.s $f2, %[weight_coeff_a], $f0 \n\t"
75  "mul.s $f5, %[weight_coeff_a], $f3 \n\t"
76  "madd.s $f2, $f2, %[weight_coeff_b], $f1 \n\t"
77  "madd.s $f5, $f5, %[weight_coeff_b], $f4 \n\t"
78  "addiu %[in_a], 8 \n\t"
79  "addiu %[in_b], 8 \n\t"
80  "swc1 $f2, 0(%[out]) \n\t"
81  "swc1 $f5, 4(%[out]) \n\t"
82  "addiu %[out], 8 \n\t"
83  "bne %[in_a], %[a_end], ff_weighted_vector_sumf_madd%= \n\t"
84 
85  "ff_weighted_vector_sumf_end%=: \n\t"
86 
87  : [out] "+r" (out), [in_a] "+r" (in_a), [in_b] "+r" (in_b)
88  : [weight_coeff_a] "f" (weight_coeff_a),
89  [weight_coeff_b] "f" (weight_coeff_b),
90  [length] "r" (length), [a_end]"r"(a_end)
91  : "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "memory"
92  );
93 }
94 #endif /* HAVE_INLINE_ASM */
95 
97 {
98 #if HAVE_INLINE_ASM
99  c->weighted_vector_sumf = ff_weighted_vector_sumf_mips;
100 #endif
101 }