blob: 0e2293c3fa48f8854a019da417dc789c2fe4221b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
#ifndef MATHTOOLS_H
#define MATHTOOLS_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 BigEndian_
#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
|
