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72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
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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 MATHOPS_H
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#define 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_PPC)
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#include "ppc/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 //MATHOPS_H
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