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/* Goom Project
* Copyright (C) <2003> Jean-Christophe Hoelt <jeko@free.fr>
*
* goom_core.c:Contains the core of goom's work.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef MATHTOOLS_H
#define MATHTOOLS_H
#include <glib.h>
#define _double2fixmagic (68719476736.0*1.5)
/* 2^36 * 1.5, (52-_shiftamt=36) uses limited precisicion to floor */
#define _shiftamt 16
/* 16.16 fixed point representation */
#if G_BYTE_ORDER == G_BIG_ENDIAN
#define iexp_ 0
#define iman_ 1
#else
#define iexp_ 1
#define iman_ 0
#endif /* BigEndian_ */
/* TODO: this optimization is very efficient: put it again when all works
#ifdef HAVE_MMX
#define F2I(dbl,i) {double d = dbl + _double2fixmagic; i = ((int*)&d)[iman_] >> _shiftamt;}
#else*/
#define F2I(dbl,i) i=(int)dbl;
/*#endif*/
#if 0
#define SINCOS(f,s,c) \
__asm__ __volatile__ ("fsincos" : "=t" (c), "=u" (s) : "0" (f))
#else
#define SINCOS(f,s,c) {s=sin(f);c=cos(f);}
#endif
extern float sin256[256];
extern float cos256[256];
#endif
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