PeerStreamer

/*

 * simple math operations

 * Copyright (c) 2001, 2002 Fabrice Bellard.

 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifndef FFMPEG_MATHOPS_H

#define FFMPEG_MATHOPS_H

#include "common.h"

#ifdef ARCH_X86_32

#include "i386/mathops.h"

#elif defined(ARCH_ARMV4L)

#include "armv4l/mathops.h"

#elif defined(ARCH_PPC)

#include "ppc/mathops.h"

#elif defined(ARCH_BFIN)

#include "bfin/mathops.h"

#endif

/* generic implementation */

#ifndef MULL

#   define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)

#endif

#ifndef MULH

//gcc 3.4 creates an incredibly bloated mess out of this

//#    define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32)

static av_always_inline int MULH(int a, int b){

    return ((int64_t)(a) * (int64_t)(b))>>32;

}

#endif

#ifndef MUL64

#   define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))

#endif

/* signed 16x16 -> 32 multiply add accumulate */

#ifndef MAC16

#   define MAC16(rt, ra, rb) rt += (ra) * (rb)

#endif

/* signed 16x16 -> 32 multiply */

#ifndef MUL16

#   define MUL16(ra, rb) ((ra) * (rb))

#endif

#endif /* FFMPEG_MATHOPS_H */