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/libavcodec/mips/mathops.h

http://github.com/FFmpeg/FFmpeg
C Header | 67 lines | 38 code | 9 blank | 20 comment | 0 complexity | a1abed91d24dd69968922e0fb7f72988 MD5 | raw file
 1/*
 2 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
 3 * Copyright (c) 2015 Zhou Xiaoyong <zhouxiaoyong@loongson.cn>
 4 *
 5 * This file is part of FFmpeg.
 6 *
 7 * FFmpeg is free software; you can redistribute it and/or
 8 * modify it under the terms of the GNU Lesser General Public
 9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_MIPS_MATHOPS_H
23#define AVCODEC_MIPS_MATHOPS_H
24
25#include <stdint.h>
26#include "config.h"
27#include "libavutil/common.h"
28
29#if HAVE_INLINE_ASM
30
31#if HAVE_LOONGSON3
32
33#define MULH MULH
34static inline av_const int MULH(int a, int b)
35{
36    int c;
37    __asm__ ("dmult %1, %2      \n\t"
38             "mflo %0           \n\t"
39             "dsrl %0, %0, 32   \n\t"
40             : "=r"(c)
41             : "r"(a),"r"(b)
42             : "hi", "lo");
43    return c;
44}
45
46#define mid_pred mid_pred
47static inline av_const int mid_pred(int a, int b, int c)
48{
49    int t = b;
50    __asm__ ("sgt $8, %1, %2    \n\t"
51             "movn %0, %1, $8   \n\t"
52             "movn %1, %2, $8   \n\t"
53             "sgt $8, %1, %3    \n\t"
54             "movz %1, %3, $8   \n\t"
55             "sgt $8, %0, %1    \n\t"
56             "movn %0, %1, $8   \n\t"
57             : "+&r"(t),"+&r"(a)
58             : "r"(b),"r"(c)
59             : "$8");
60    return t;
61}
62
63#endif /* HAVE_LOONGSON3 */
64
65#endif /* HAVE_INLINE_ASM */
66
67#endif /* AVCODEC_MIPS_MATHOPS_H */