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celp_math_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  * Math operations optimized for MIPS
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/celp_math.c
53  */
54 #include "config.h"
55 #include "libavcodec/celp_math.h"
56 #include "libavutil/mips/asmdefs.h"
57 
58 #if HAVE_INLINE_ASM
59 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
60 static float ff_dot_productf_mips(const float* a, const float* b,
61  int length)
62 {
63  float sum;
64  const float* a_end = a + length;
65 
66  __asm__ volatile (
67  "mtc1 $zero, %[sum] \n\t"
68  "blez %[length], ff_dot_productf_end%= \n\t"
69  "ff_dot_productf_madd%=: \n\t"
70  "lwc1 $f2, 0(%[a]) \n\t"
71  "lwc1 $f1, 0(%[b]) \n\t"
72  PTR_ADDIU "%[a], %[a], 4 \n\t"
73  PTR_ADDIU "%[b], %[b], 4 \n\t"
74  "madd.s %[sum], %[sum], $f1, $f2 \n\t"
75  "bne %[a], %[a_end], ff_dot_productf_madd%= \n\t"
76  "ff_dot_productf_end%=: \n\t"
77 
78  : [sum] "=&f" (sum), [a] "+r" (a), [b] "+r" (b)
79  : [a_end]"r"(a_end), [length] "r" (length)
80  : "$f1", "$f2", "memory"
81  );
82  return sum;
83 }
84 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
85 #endif /* HAVE_INLINE_ASM */
86 
88 {
89 #if HAVE_INLINE_ASM
90 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
91  c->dot_productf = ff_dot_productf_mips;
92 #endif
93 #endif
94 }
MIPS assembly defines from sys/asm.h but rewritten for use with C inline assembly (rather than from w...
const char * b
Definition: vf_curves.c:109
float(* dot_productf)(const float *a, const float *b, int length)
Return the dot product.
Definition: celp_math.h:37
GLsizei GLsizei * length
Definition: opengl_enc.c:115
#define PTR_ADDIU
Definition: asmdefs.h:48
static double c[64]
void ff_celp_math_init_mips(CELPMContext *c)