7a47a9188cfe33efcfff34c90319eb1751e1e989
[libav.git] / libavcodec / mathops.h
1 /*
2 * simple math operations
3 * Copyright (c) 2001, 2002 Fabrice Bellard.
4 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22 #ifndef MATHOPS_H
23 #define MATHOPS_H
24
25 #include "common.h"
26
27 #ifdef ARCH_X86_32
28
29 #include "i386/mathops.h"
30
31 #elif defined(ARCH_ARMV4L)
32
33 #include "armv4l/mathops.h"
34
35 #elif defined(ARCH_PPC)
36
37 #include "ppc/mathops.h"
38
39 #elif defined(ARCH_BFIN)
40
41 #include "bfin/mathops.h"
42
43 #endif
44
45 /* generic implementation */
46
47 #ifndef MULL
48 # define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
49 #endif
50
51 #ifndef MULH
52 //gcc 3.4 creates an incredibly bloated mess out of this
53 //# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32)
54
55 static av_always_inline int MULH(int a, int b){
56 return ((int64_t)(a) * (int64_t)(b))>>32;
57 }
58 #endif
59
60 #ifndef MUL64
61 # define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
62 #endif
63
64 /* signed 16x16 -> 32 multiply add accumulate */
65 #ifndef MAC16
66 # define MAC16(rt, ra, rb) rt += (ra) * (rb)
67 #endif
68
69 /* signed 16x16 -> 32 multiply */
70 #ifndef MUL16
71 # define MUL16(ra, rb) ((ra) * (rb))
72 #endif
73
74 #endif //MATHOPS_H
75