2 * Copyright (C) <2003> Jean-Christophe Hoelt <jeko@free.fr>
4 * goom_core.c:Contains the core of goom's work.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
26 #define _double2fixmagic (68719476736.0*1.5)
27 /* 2^36 * 1.5, (52-_shiftamt=36) uses limited precisicion to floor */
29 /* 16.16 fixed point representation */
37 #endif /* BigEndian_ */
39 /* TODO: this optimization is very efficient: put it again when all works
41 #define F2I(dbl,i) {double d = dbl + _double2fixmagic; i = ((int*)&d)[iman_] >> _shiftamt;}
43 #define F2I(dbl,i) i=(int)dbl;
47 #define SINCOS(f,s,c) \
48 __asm__ __volatile__ ("fsincos" : "=t" (c), "=u" (s) : "0" (f))
50 #define SINCOS(f,s,c) {s=sin(f);c=cos(f);}
53 extern float sin256[256];
54 extern float cos256[256];