Move COPY3_IF_LT to lavc/mathops.h
[libav.git] / libavcodec / mathops.h
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1/*
2 * simple math operations
406792e7 3 * Copyright (c) 2001, 2002 Fabrice Bellard
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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 */
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22#ifndef AVCODEC_MATHOPS_H
23#define AVCODEC_MATHOPS_H
99aed7c8 24
245976da 25#include "libavutil/common.h"
99545457 26
e20a4f53 27#if ARCH_ARM
26f6a574 28# include "arm/mathops.h"
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29#elif ARCH_AVR32
30# include "avr32/mathops.h"
b250f9c6 31#elif ARCH_BFIN
26f6a574 32# include "bfin/mathops.h"
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33#elif ARCH_MIPS
34# include "mips/mathops.h"
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35#elif ARCH_PPC
36# include "ppc/mathops.h"
37#elif ARCH_X86
38# include "x86/mathops.h"
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39#endif
40
41/* generic implementation */
42
43#ifndef MULL
4deaa946 44# define MULL(a,b,s) (((int64_t)(a) * (int64_t)(b)) >> (s))
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45#endif
46
47#ifndef MULH
48//gcc 3.4 creates an incredibly bloated mess out of this
49//# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32)
50
849f1035 51static av_always_inline int MULH(int a, int b){
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52 return ((int64_t)(a) * (int64_t)(b))>>32;
53}
54#endif
55
56#ifndef MUL64
57# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
58#endif
59
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60#ifndef MAC64
61# define MAC64(d, a, b) ((d) += MUL64(a, b))
62#endif
63
64#ifndef MLS64
65# define MLS64(d, a, b) ((d) -= MUL64(a, b))
66#endif
67
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68/* signed 16x16 -> 32 multiply add accumulate */
69#ifndef MAC16
70# define MAC16(rt, ra, rb) rt += (ra) * (rb)
71#endif
72
73/* signed 16x16 -> 32 multiply */
74#ifndef MUL16
75# define MUL16(ra, rb) ((ra) * (rb))
76#endif
77
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78#ifndef MLS16
79# define MLS16(rt, ra, rb) ((rt) -= (ra) * (rb))
80#endif
81
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82/* median of 3 */
83#ifndef mid_pred
84#define mid_pred mid_pred
85static inline av_const int mid_pred(int a, int b, int c)
86{
87#if 0
88 int t= (a-b)&((a-b)>>31);
89 a-=t;
90 b+=t;
91 b-= (b-c)&((b-c)>>31);
92 b+= (a-b)&((a-b)>>31);
93
94 return b;
95#else
96 if(a>b){
97 if(c>b){
98 if(c>a) b=a;
99 else b=c;
100 }
101 }else{
102 if(b>c){
103 if(c>a) b=c;
104 else b=a;
105 }
106 }
107 return b;
108#endif
109}
110#endif
111
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112#ifndef sign_extend
113static inline av_const int sign_extend(int val, unsigned bits)
114{
115 return (val << (INT_BIT - bits)) >> (INT_BIT - bits);
116}
117#endif
118
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119#ifndef COPY3_IF_LT
120#define COPY3_IF_LT(x, y, a, b, c, d)\
121if ((y) < (x)) {\
122 (x) = (y);\
123 (a) = (b);\
124 (c) = (d);\
125}
126#endif
127
98790382 128#endif /* AVCODEC_MATHOPS_H */
99aed7c8 129