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75 lines
1.8 KiB
75 lines
1.8 KiB
/* |
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* simple math operations |
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* Copyright (c) 2001, 2002 Fabrice Bellard. |
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef FFMPEG_MATHOPS_H |
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#define FFMPEG_MATHOPS_H |
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#include "common.h" |
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#ifdef ARCH_X86_32 |
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#include "i386/mathops.h" |
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#elif defined(ARCH_ARMV4L) |
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#include "armv4l/mathops.h" |
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#elif defined(ARCH_POWERPC) |
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#include "ppc/mathops.h" |
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#elif defined(ARCH_BFIN) |
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#include "bfin/mathops.h" |
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#endif |
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/* generic implementation */ |
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#ifndef MULL |
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# define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS) |
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#endif |
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#ifndef MULH |
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//gcc 3.4 creates an incredibly bloated mess out of this |
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//# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32) |
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static av_always_inline int MULH(int a, int b){ |
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return ((int64_t)(a) * (int64_t)(b))>>32; |
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} |
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#endif |
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#ifndef MUL64 |
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# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b)) |
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#endif |
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/* signed 16x16 -> 32 multiply add accumulate */ |
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#ifndef MAC16 |
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# define MAC16(rt, ra, rb) rt += (ra) * (rb) |
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#endif |
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/* signed 16x16 -> 32 multiply */ |
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#ifndef MUL16 |
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# define MUL16(ra, rb) ((ra) * (rb)) |
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#endif |
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#endif /* FFMPEG_MATHOPS_H */ |
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