1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* simple math operations
* Copyright (c) 2001, 2002 Fabrice Bellard.
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef MATHOPS_H
#define MATHOPS_H
#ifdef ARCH_X86_32
#include "i386/mathops.h"
#elif defined(ARCH_ARMV4L)
#include "armv4l/mathops.h"
#elif defined(ARCH_PPC)
#include "ppc/mathops.h"
#endif
/* generic implementation */
#ifndef MULL
# define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
#endif
#ifndef MULH
//gcc 3.4 creates an incredibly bloated mess out of this
//# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32)
static av_always_inline int MULH(int a, int b){
return ((int64_t)(a) * (int64_t)(b))>>32;
}
#endif
#ifndef MUL64
# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
#endif
/* signed 16x16 -> 32 multiply add accumulate */
#ifndef MAC16
# define MAC16(rt, ra, rb) rt += (ra) * (rb)
#endif
/* signed 16x16 -> 32 multiply */
#ifndef MUL16
# define MUL16(ra, rb) ((ra) * (rb))
#endif
#endif //MATHOPS_H
|
