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mathops.h
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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
34 static 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
47 static 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 */
#define av_const
Definition: attributes.h:76
const char * b
Definition: vf_curves.c:116
#define mid_pred
Definition: mathops.h:97
common internal and external API header
static double c[64]
#define MULH
Definition: mathops.h:42