Add ARCH_X86_32 as a new define for 32 bit x86 architectures and change
[libav.git] / libavcodec / mathops.h
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1/*
2 * simple math operations
3 * Copyright (c) 2001, 2002 Fabrice Bellard.
4 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
5 *
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6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
b78e7197 11 * version 2.1 of the License, or (at your option) any later version.
99aed7c8 12 *
b78e7197 13 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 19 * License along with FFmpeg; if not, write to the Free Software
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20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22#ifndef MATHOPS_H
23#define MATHOPS_H
24
419b8784 25#ifdef ARCH_X86_32
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26
27#include "i386/mathops.h"
28
29#elif defined(ARCH_ARMV4L)
30
31#include "armv4l/mathops.h"
32
33#elif defined(ARCH_PPC)
34
35#include "ppc/mathops.h"
36
37#endif
38
39/* generic implementation */
40
41#ifndef MULL
42# define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
43#endif
44
45#ifndef MULH
46//gcc 3.4 creates an incredibly bloated mess out of this
47//# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32)
48
49static always_inline int MULH(int a, int b){
50 return ((int64_t)(a) * (int64_t)(b))>>32;
51}
52#endif
53
54#ifndef MUL64
55# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
56#endif
57
58/* signed 16x16 -> 32 multiply add accumulate */
59#ifndef MAC16
60# define MAC16(rt, ra, rb) rt += (ra) * (rb)
61#endif
62
63/* signed 16x16 -> 32 multiply */
64#ifndef MUL16
65# define MUL16(ra, rb) ((ra) * (rb))
66#endif
67
68#endif //MATHOPS_H
69