FFmpeg
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 #include "libavutil/mips/asmdefs.h"
58 
59 #if HAVE_INLINE_ASM
60 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
61 static void ff_weighted_vector_sumf_mips(
62  float *out, const float *in_a, const float *in_b,
63  float weight_coeff_a, float weight_coeff_b, int length)
64 {
65  const float *a_end = in_a + length;
66 
67  /* loop unrolled two times */
68  __asm__ volatile (
69  "blez %[length], ff_weighted_vector_sumf_end%= \n\t"
70 
71  "ff_weighted_vector_sumf_madd%=: \n\t"
72  "lwc1 $f0, 0(%[in_a]) \n\t"
73  "lwc1 $f3, 4(%[in_a]) \n\t"
74  "lwc1 $f1, 0(%[in_b]) \n\t"
75  "lwc1 $f4, 4(%[in_b]) \n\t"
76  "mul.s $f2, %[weight_coeff_a], $f0 \n\t"
77  "mul.s $f5, %[weight_coeff_a], $f3 \n\t"
78  "madd.s $f2, $f2, %[weight_coeff_b], $f1 \n\t"
79  "madd.s $f5, $f5, %[weight_coeff_b], $f4 \n\t"
80  PTR_ADDIU "%[in_a],8 \n\t"
81  PTR_ADDIU "%[in_b],8 \n\t"
82  "swc1 $f2, 0(%[out]) \n\t"
83  "swc1 $f5, 4(%[out]) \n\t"
84  PTR_ADDIU "%[out], 8 \n\t"
85  "bne %[in_a], %[a_end], ff_weighted_vector_sumf_madd%= \n\t"
86 
87  "ff_weighted_vector_sumf_end%=: \n\t"
88 
89  : [out] "+r" (out), [in_a] "+r" (in_a), [in_b] "+r" (in_b)
90  : [weight_coeff_a] "f" (weight_coeff_a),
91  [weight_coeff_b] "f" (weight_coeff_b),
92  [length] "r" (length), [a_end]"r"(a_end)
93  : "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "memory"
94  );
95 }
96 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
97 #endif /* HAVE_INLINE_ASM */
98 
100 {
101 #if HAVE_INLINE_ASM
102 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
103  c->weighted_vector_sumf = ff_weighted_vector_sumf_mips;
104 #endif
105 #endif
106 }
MIPS assembly defines from sys/asm.h but rewritten for use with C inline assembly (rather than from w...
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
void(* weighted_vector_sumf)(float *out, const float *in_a, const float *in_b, float weight_coeff_a, float weight_coeff_b, int length)
float implementation of weighted sum of two vectors.
Definition: acelp_vectors.h:40
GLsizei GLsizei * length
Definition: opengl_enc.c:114
void ff_acelp_vectors_init_mips(ACELPVContext *c)
#define PTR_ADDIU
Definition: asmdefs.h:48
FILE * out
Definition: movenc.c:54