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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 | ||
57 | #if HAVE_INLINE_ASM | |
58 | static float ff_dot_productf_mips(const float* a, const float* b, | |
59 | int length) | |
60 | { | |
61 | float sum; | |
62 | const float* a_end = a + length; | |
63 | ||
64 | __asm__ volatile ( | |
65 | "mtc1 $zero, %[sum] \n\t" | |
66 | "blez %[length], ff_dot_productf_end%= \n\t" | |
67 | "ff_dot_productf_madd%=: \n\t" | |
68 | "lwc1 $f2, 0(%[a]) \n\t" | |
69 | "lwc1 $f1, 0(%[b]) \n\t" | |
70 | "addiu %[a], %[a], 4 \n\t" | |
71 | "addiu %[b], %[b], 4 \n\t" | |
72 | "madd.s %[sum], %[sum], $f1, $f2 \n\t" | |
73 | "bne %[a], %[a_end], ff_dot_productf_madd%= \n\t" | |
74 | "ff_dot_productf_end%=: \n\t" | |
75 | ||
76 | : [sum] "=&f" (sum), [a] "+r" (a), [b] "+r" (b) | |
77 | : [a_end]"r"(a_end), [length] "r" (length) | |
78 | : "$f1", "$f2", "memory" | |
79 | ); | |
80 | return sum; | |
81 | } | |
82 | #endif /* HAVE_INLINE_ASM */ | |
83 | ||
84 | void ff_celp_math_init_mips(CELPMContext *c) | |
85 | { | |
86 | #if HAVE_INLINE_ASM | |
87 | c->dot_productf = ff_dot_productf_mips; | |
88 | #endif | |
89 | } |