xine-lib  1.2.10
mathtools.h
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1 #ifndef MATHTOOLS_H
2 #define MATHTOOLS_H
3 
4 
5 #define _double2fixmagic (68719476736.0*1.5)
6 /* 2^36 * 1.5, (52-_shiftamt=36) uses limited precisicion to floor */
7 #define _shiftamt 16
8 /* 16.16 fixed point representation */
9 
10 #if BigEndian_
11 #define iexp_ 0
12 #define iman_ 1
13 #else
14 #define iexp_ 1
15 #define iman_ 0
16 #endif /* BigEndian_ */
17 
18 /* TODO: this optimization is very efficient: put it again when all works
19 #ifdef HAVE_MMX
20 #define F2I(dbl,i) {double d = dbl + _double2fixmagic; i = ((int*)&d)[iman_] >> _shiftamt;}
21 #else*/
22 #define F2I(dbl,i) i=(int)dbl;
23 /*#endif*/
24 
25 #if 0
26 #define SINCOS(f,s,c) \
27  __asm__ __volatile__ ("fsincos" : "=t" (c), "=u" (s) : "0" (f))
28 #else
29 #define SINCOS(f,s,c) {s=sin(f);c=cos(f);}
30 #endif
31 
32 #include "mathtools.c"
33 
34 #endif
35 
cos256
static const float cos256[256]
Definition: mathtools.c:47
mathtools.c
sin256
static const float sin256[256]
Definition: mathtools.c:11