diff options
Diffstat (limited to 'gst/goom/mathtools.h')
| -rw-r--r-- | gst/goom/mathtools.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/gst/goom/mathtools.h b/gst/goom/mathtools.h new file mode 100644 index 00000000..0e2293c3 --- /dev/null +++ b/gst/goom/mathtools.h @@ -0,0 +1,36 @@ +#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 + |