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src/win32/include/math.h  view on Meta::CPAN

#endif
#endif
#endif

#ifndef	NO_OLDNAMES
#define matherr _matherr

#define HUGE	_HUGE
  /*	double __cdecl cabs(struct _complex _X); */
  double __cdecl hypot(double _X,double _Y);
  _CRTIMP double __cdecl j0(double _X);
  _CRTIMP double __cdecl j1(double _X);
  _CRTIMP double __cdecl jn(int _X,double _Y);
  _CRTIMP double __cdecl y0(double _X);
  _CRTIMP double __cdecl y1(double _X);
  _CRTIMP double __cdecl yn(int _X,double _Y);
#endif

#ifndef __NO_ISOCEXT
#if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
  || !defined __STRICT_ANSI__ || defined __GLIBCPP__

#define NAN (0.0F/0.0F)
#define HUGE_VALF (1.0F/0.0F)
#define HUGE_VALL (1.0L/0.0L)
#define INFINITY (1.0F/0.0F)


#define FP_NAN		0x0100
#define FP_NORMAL	0x0400
#define FP_INFINITE	(FP_NAN | FP_NORMAL)
#define FP_ZERO		0x4000
#define FP_SUBNORMAL	(FP_NORMAL | FP_ZERO)
  /* 0x0200 is signbit mask */


  /*
  We can't __CRT_INLINE float or double, because we want to ensure truncation
  to semantic type before classification. 
  (A normal long double value might become subnormal when 
  converted to double, and zero when converted to float.)
  */

  extern int __cdecl __fpclassifyf (float);
  extern int __cdecl __fpclassify (double);
  extern int __cdecl __fpclassifyl (long double);

/* Implemented at tcc/tcc_libm.h */
#define fpclassify(x) (sizeof (x) == sizeof (float) ? __fpclassifyf (x)	  \
  : sizeof (x) == sizeof (double) ? __fpclassify (x) \
  : __fpclassifyl (x))

  /* 7.12.3.2 */
#define isfinite(x) ((fpclassify(x) & FP_NAN) == 0)

  /* 7.12.3.3 */
#define isinf(x) (fpclassify(x) == FP_INFINITE)

  /* 7.12.3.4 */
  /* We don't need to worry about trucation here:
  A NaN stays a NaN. */
#define isnan(x) (fpclassify(x) == FP_NAN)

  /* 7.12.3.5 */
#define isnormal(x) (fpclassify(x) == FP_NORMAL)

  /* 7.12.3.6 The signbit macro */

  extern int __cdecl __signbitf (float);
  extern int __cdecl __signbit (double);
  extern int __cdecl __signbitl (long double);

/* Implemented at tcc/tcc_libm.h */
#define signbit(x) (sizeof (x) == sizeof (float) ? __signbitf (x)	\
  : sizeof (x) == sizeof (double) ? __signbit (x)	\
  : __signbitl (x))

  extern double __cdecl exp2(double);
  extern float __cdecl exp2f(float);
  extern long double __cdecl exp2l(long double);

#define FP_ILOGB0 ((int)0x80000000)
#define FP_ILOGBNAN ((int)0x80000000)
  extern int __cdecl ilogb (double);
  extern int __cdecl ilogbf (float);
  extern int __cdecl ilogbl (long double);

  extern double __cdecl log1p(double);
  extern float __cdecl log1pf(float);
  extern long double __cdecl log1pl(long double);

  extern double __cdecl log2 (double);
  extern float __cdecl log2f (float);
  extern long double __cdecl log2l (long double);

  extern double __cdecl logb (double);
  extern float __cdecl logbf (float);
  extern long double __cdecl logbl (long double);

  __CRT_INLINE double __cdecl logb (double x)
  {
    double res;
    __asm__ ("fxtract\n\t"
      "fstp	%%st" : "=t" (res) : "0" (x));
    return res;
  }

  __CRT_INLINE float __cdecl logbf (float x)
  {
    float res;
    __asm__ ("fxtract\n\t"
      "fstp	%%st" : "=t" (res) : "0" (x));
    return res;
  }

  __CRT_INLINE long double __cdecl logbl (long double x)
  {
    long double res;
    __asm__ ("fxtract\n\t"
      "fstp	%%st" : "=t" (res) : "0" (x));
    return res;

src/win32/include/math.h  view on Meta::CPAN

  #define FE_TONEAREST	0x0000
  #define FE_DOWNWARD	0x0400
  #define FE_UPWARD	0x0800
  #define FE_TOWARDZERO	0x0c00

  __CRT_INLINE double trunc (double _x)
  {
    double retval;
    unsigned short saved_cw;
    unsigned short tmp_cw;
    __asm__ ("fnstcw %0;" : "=m" (saved_cw)); /* save FPU control word */
    tmp_cw = (saved_cw & ~(FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO))
	    | FE_TOWARDZERO;
    __asm__ ("fldcw %0;" : : "m" (tmp_cw));
    __asm__ ("fldl  %1;"
             "frndint;"
             "fstl  %0;" : "=m" (retval)  : "m" (_x)); /* round towards zero */
    __asm__ ("fldcw %0;" : : "m" (saved_cw) ); /* restore saved control word */
    return retval;
  }

  /* 7.12.9.6 */
  /* round away from zero, regardless of fpu control word settings */
  extern double __cdecl round (double);
  extern float __cdecl roundf (float);
  extern long double __cdecl roundl (long double);

  /* 7.12.9.7  */
  extern long __cdecl lround (double);
  extern long __cdecl lroundf (float);
  extern long __cdecl lroundl (long double);

  extern long long __cdecl llround (double);
  extern long long __cdecl llroundf (float);
  extern long long __cdecl llroundl (long double);

  /* 7.12.9.8 */
  /* round towards zero, regardless of fpu control word settings */
  extern double __cdecl trunc (double);
  extern float __cdecl truncf (float);
  extern long double __cdecl truncl (long double);

  extern long double __cdecl fmodl (long double, long double);

  /* 7.12.10.2 */ 
  extern double __cdecl remainder (double, double);
  extern float __cdecl remainderf (float, float);
  extern long double __cdecl remainderl (long double, long double);

  /* 7.12.10.3 */
  extern double __cdecl remquo(double, double, int *);
  extern float __cdecl remquof(float, float, int *);
  extern long double __cdecl remquol(long double, long double, int *);

  /* 7.12.11.1 */
  extern double __cdecl copysign (double, double); /* in libmoldname.a */
  extern float __cdecl copysignf (float, float);
  extern long double __cdecl copysignl (long double, long double);

  /* 7.12.11.2 Return a NaN */
  extern double __cdecl nan(const char *tagp);
  extern float __cdecl nanf(const char *tagp);
  extern long double __cdecl nanl(const char *tagp);

#ifndef __STRICT_ANSI__
#define _nan() nan("")
#define _nanf() nanf("")
#define _nanl() nanl("")
#endif

  /* 7.12.11.3 */
  extern double __cdecl nextafter (double, double); /* in libmoldname.a */
  extern float __cdecl nextafterf (float, float);
  extern long double __cdecl nextafterl (long double, long double);

  /* 7.12.11.4 The nexttoward functions: TODO */

  /* 7.12.12.1 */
  /*  x > y ? (x - y) : 0.0  */
  extern double __cdecl fdim (double x, double y);
  extern float __cdecl fdimf (float x, float y);
  extern long double __cdecl fdiml (long double x, long double y);

  /* fmax and fmin.
  NaN arguments are treated as missing data: if one argument is a NaN
  and the other numeric, then these functions choose the numeric
  value. */

  /* 7.12.12.2 */
  extern double __cdecl fmax  (double, double);
  extern float __cdecl fmaxf (float, float);
  extern long double __cdecl fmaxl (long double, long double);

  /* 7.12.12.3 */
  extern double __cdecl fmin (double, double);
  extern float __cdecl fminf (float, float);
  extern long double __cdecl fminl (long double, long double);

  /* 7.12.13.1 */
  /* return x * y + z as a ternary op */ 
  extern double __cdecl fma (double, double, double);
  extern float __cdecl fmaf (float, float, float);
  extern long double __cdecl fmal (long double, long double, long double);


#if 0 // gr: duplicate, see below
  /* 7.12.14 */
  /* 
  *  With these functions, comparisons involving quiet NaNs set the FP
  *  condition code to "unordered".  The IEEE floating-point spec
  *  dictates that the result of floating-point comparisons should be
  *  false whenever a NaN is involved, with the exception of the != op, 
  *  which always returns true: yes, (NaN != NaN) is true).
  */

#if __GNUC__ >= 3

#define isgreater(x, y) __builtin_isgreater(x, y)
#define isgreaterequal(x, y) __builtin_isgreaterequal(x, y)
#define isless(x, y) __builtin_isless(x, y)
#define islessequal(x, y) __builtin_islessequal(x, y)
#define islessgreater(x, y) __builtin_islessgreater(x, y)
#define isunordered(x, y) __builtin_isunordered(x, y)

#else
  /*  helper  */
  __CRT_INLINE int  __cdecl
    __fp_unordered_compare (long double x, long double y){
      unsigned short retval;
      __asm__ ("fucom %%st(1);"
	"fnstsw;": "=a" (retval) : "t" (x), "u" (y));
      return retval;
  }

#define isgreater(x, y) ((__fp_unordered_compare(x, y) \
  & 0x4500) == 0)
#define isless(x, y) ((__fp_unordered_compare (y, x) \
  & 0x4500) == 0)
#define isgreaterequal(x, y) ((__fp_unordered_compare (x, y) \
  & FP_INFINITE) == 0)
#define islessequal(x, y) ((__fp_unordered_compare(y, x) \
  & FP_INFINITE) == 0)
#define islessgreater(x, y) ((__fp_unordered_compare(x, y) \
  & FP_SUBNORMAL) == 0)
#define isunordered(x, y) ((__fp_unordered_compare(x, y) \
  & 0x4500) == 0x4500)

#endif
#endif //0


#endif /* __STDC_VERSION__ >= 199901L */
#endif /* __NO_ISOCEXT */

#ifdef __cplusplus
}
extern "C++" {
  template<class _Ty> inline _Ty _Pow_int(_Ty _X,int _Y) {
    unsigned int _N;
    if(_Y >= 0) _N = (unsigned int)_Y;
    else _N = (unsigned int)(-_Y);
    for(_Ty _Z = _Ty(1);;_X *= _X) {
      if((_N & 1)!=0) _Z *= _X;
      if((_N >>= 1)==0) return (_Y < 0 ? _Ty(1) / _Z : _Z); 
    }
  }
}
#endif

#pragma pack(pop)

/* 7.12.14 */
/* 
 *  With these functions, comparisons involving quiet NaNs set the FP
 *  condition code to "unordered".  The IEEE floating-point spec
 *  dictates that the result of floating-point comparisons should be
 *  false whenever a NaN is involved, with the exception of the != op, 
 *  which always returns true: yes, (NaN != NaN) is true).
 */

/* Mini libm (inline __fpclassify*, __signbit* and variants) */
#include "tcc/tcc_libm.h"

#endif /* End _MATH_H_ */