math.h

关于DSP C54x的卷积积分算法的源码

/********************************************************************/
/* MATH.H   v3.70                                                  */
/* Copyright (c) 1993-2001 Texas Instruments Incorporated           */
/********************************************************************/
#ifndef _MATH
#define _MATH

#include <linkage.h>

#ifdef __cplusplus
extern "C" namespace std {
#endif

#if _INLINE
#define __INLINE static __inline
#else
#define __INLINE
#endif

#define HUGE_VAL  3.40232347E+38F

/***************************************************************/
/* FUNCTION DECLARATIONS.                                      */
/***************************************************************/
         double asin(double _x);
         double acos(double _x);
         double atan(double _x);
         double atan2(double _y, double _x);
__INLINE double ceil(double _x);
         double cos(double _x);
         double cosh(double _x);
         double exp(double _x);
#if !defined(__TMS470__) && !defined(__TMS320C27XX__)
         double fabs(double _x);
#endif
__INLINE double floor(double _x);
__INLINE double fmod(double _x, double _y);
         double frexp(double _x, int *_exp);
         double ldexp(double _x, int _exp);
         double log(double _x);
         double log10(double _x);
         double modf(double _x, double *_iptr);
         double pow(double _x, double _y);
         double sin(double _x);
         double sinh(double _x);
         double sqrt(double _x);
         double tan(double _x);
         double tanh(double _x);

#if defined(_INLINE) || defined(_CEIL)
_IDEFN double ceil(double x)
{
     double y; 
     return (modf(x, &y) > 0 ? y + 1.0 : y);
}
#endif /* _INLINE || _CEIL */

#if defined(_INLINE) || defined(_FLOOR)
_IDEFN double floor(double x)
{
     double y; 
     return (modf(x, &y) < 0 ? y - 1.0 : y);
}
#endif /* _INLINE || _CEIL */

#if _INLINE
/****************************************************************************/
/*  fmod()       				                            */
/****************************************************************************/
static __inline double fmod(double x, double y)
{
   double d = fabs(x); 

   if (d - fabs(y) == d) return (0.0);
   modf(x/y, &d);
   return (x - d * y);
}
#endif /* _INLINE */
#undef __INLINE

#ifdef __cplusplus
} /* extern "C" namespace std */

using std::asin;
using std::acos;
using std::atan;
using std::atan2;
using std::ceil;
using std::cos;
using std::cosh;
using std::exp;
using std::fabs;
using std::floor;
using std::fmod;
using std::frexp;
using std::ldexp;
using std::log;
using std::log10;
using std::modf;
using std::pow;
using std::sin;
using std::sinh;
using std::sqrt;
using std::tan;
using std::tanh;

#endif /* __cplusplus */

#endif /* _MATH   */