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
ff_dot_productf_mips(const float * a,const float * b,int length)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
ff_celp_math_init_mips(CELPMContext * c)87 void ff_celp_math_init_mips(CELPMContext *c)
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 }
95