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- /*
- * math.h
- *
- * Mathematical functions.
- *
- * This file is part of the Mingw32 package.
- *
- * Contributors:
- * Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
- *
- * THIS SOFTWARE IS NOT COPYRIGHTED
- *
- * This source code is offered for use in the public domain. You may
- * use, modify or distribute it freely.
- *
- * This code is distributed in the hope that it will be useful but
- * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
- * DISCLAIMED. This includes but is not limited to warranties of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * $Revision: 1.13 $
- * $Author: earnie $
- * $Date: 2003/02/05 23:04:51 $
- *
- */
-
- #ifndef _MATH_H_
- #define _MATH_H_
-
- /* All the headers include this file. */
- #include <_mingw.h>
-
- /*
- * Types for the _exception structure.
- */
-
- #define _DOMAIN 1 /* domain error in argument */
- #define _SING 2 /* singularity */
- #define _OVERFLOW 3 /* range overflow */
- #define _UNDERFLOW 4 /* range underflow */
- #define _TLOSS 5 /* total loss of precision */
- #define _PLOSS 6 /* partial loss of precision */
-
- /*
- * Exception types with non-ANSI names for compatibility.
- */
-
- #ifndef __STRICT_ANSI__
- #ifndef _NO_OLDNAMES
-
- #define DOMAIN _DOMAIN
- #define SING _SING
- #define OVERFLOW _OVERFLOW
- #define UNDERFLOW _UNDERFLOW
- #define TLOSS _TLOSS
- #define PLOSS _PLOSS
-
- #endif /* Not _NO_OLDNAMES */
- #endif /* Not __STRICT_ANSI__ */
-
-
- /* Traditional/XOPEN math constants (double precison) */
- #ifndef __STRICT_ANSI__
- #define M_E 2.7182818284590452354
- #define M_LOG2E 1.4426950408889634074
- #define M_LOG10E 0.43429448190325182765
- #define M_LN2 0.69314718055994530942
- #define M_LN10 2.30258509299404568402
- #define M_PI 3.14159265358979323846
- #define M_PI_2 1.57079632679489661923
- #define M_PI_4 0.78539816339744830962
- #define M_1_PI 0.31830988618379067154
- #define M_2_PI 0.63661977236758134308
- #define M_2_SQRTPI 1.12837916709551257390
- #define M_SQRT2 1.41421356237309504880
- #define M_SQRT1_2 0.70710678118654752440
- #endif
-
- /* These are also defined in Mingw float.h; needed here as well to work
- around GCC build issues. */
- #ifndef __STRICT_ANSI__
- #ifndef __MINGW_FPCLASS_DEFINED
- #define __MINGW_FPCLASS_DEFINED 1
- /* IEEE 754 classication */
- #define _FPCLASS_SNAN 0x0001 /* Signaling "Not a Number" */
- #define _FPCLASS_QNAN 0x0002 /* Quiet "Not a Number" */
- #define _FPCLASS_NINF 0x0004 /* Negative Infinity */
- #define _FPCLASS_NN 0x0008 /* Negative Normal */
- #define _FPCLASS_ND 0x0010 /* Negative Denormal */
- #define _FPCLASS_NZ 0x0020 /* Negative Zero */
- #define _FPCLASS_PZ 0x0040 /* Positive Zero */
- #define _FPCLASS_PD 0x0080 /* Positive Denormal */
- #define _FPCLASS_PN 0x0100 /* Positive Normal */
- #define _FPCLASS_PINF 0x0200 /* Positive Infinity */
- #endif /* __MINGW_FPCLASS_DEFINED */
- #endif /* Not __STRICT_ANSI__ */
-
- #ifndef RC_INVOKED
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /*
- * HUGE_VAL is returned by strtod when the value would overflow the
- * representation of 'double'. There are other uses as well.
- *
- * __imp__HUGE is a pointer to the actual variable _HUGE in
- * MSVCRT.DLL. If we used _HUGE directly we would get a pointer
- * to a thunk function.
- *
- * NOTE: The CRTDLL version uses _HUGE_dll instead.
- */
-
- #ifndef __DECLSPEC_SUPPORTED
-
- #ifdef __MSVCRT__
- extern double* _imp___HUGE;
- #define HUGE_VAL (*_imp___HUGE)
- #else
- /* CRTDLL */
- extern double* _imp___HUGE_dll;
- #define HUGE_VAL (*_imp___HUGE_dll)
- #endif
-
- #else /* __DECLSPEC_SUPPORTED */
-
- #ifdef __MSVCRT__
- __MINGW_IMPORT double _HUGE;
- #define HUGE_VAL _HUGE
- #else
- /* CRTDLL */
- __MINGW_IMPORT double _HUGE_dll;
- #define HUGE_VAL _HUGE_dll
- #endif
-
- #endif /* __DECLSPEC_SUPPORTED */
-
- struct _exception
- {
- int type;
- char *name;
- double arg1;
- double arg2;
- double retval;
- };
-
-
- double sin (double);
- double cos (double);
- double tan (double);
- double sinh (double);
- double cosh (double);
- double tanh (double);
- double asin (double);
- double acos (double);
- double atan (double);
- double atan2 (double, double);
- double exp (double);
- double log (double);
- double log10 (double);
- double pow (double, double);
- double sqrt (double);
- double ceil (double);
- double floor (double);
- double fabs (double);
- extern __inline__ double fabs (double x)
- {
- double res;
- __asm__ ("fabs;" : "=t" (res) : "0" (x));
- return res;
- }
- double ldexp (double, int);
- double frexp (double, int*);
- double modf (double, double*);
- double fmod (double, double);
-
-
- #ifndef __STRICT_ANSI__
-
- /* Complex number (for cabs). This really belongs in complex.h */
- struct _complex
- {
- double x; /* Real part */
- double y; /* Imaginary part */
- };
-
- double _cabs (struct _complex);
-
- double _hypot (double, double);
- double _j0 (double);
- double _j1 (double);
- double _jn (int, double);
- double _y0 (double);
- double _y1 (double);
- double _yn (int, double);
- int _matherr (struct _exception *);
-
- /* These are also declared in Mingw float.h; needed here as well to work
- around GCC build issues. */
- /* BEGIN FLOAT.H COPY */
- /*
- * IEEE recommended functions
- */
-
- double _chgsign (double);
- double _copysign (double, double);
- double _logb (double);
- double _nextafter (double, double);
- double _scalb (double, long);
-
- int _finite (double);
- int _fpclass (double);
- int _isnan (double);
-
- /* END FLOAT.H COPY */
-
-
- /*
- * Non-underscored versions of non-ANSI functions.
- * These reside in liboldnames.a.
- */
-
- #if !defined (_NO_OLDNAMES)
-
- double cabs (struct _complex);
- double j0 (double);
- double j1 (double);
- double jn (int, double);
- double y0 (double);
- double y1 (double);
- double yn (int, double);
-
- double chgsign (double);
- double scalb (double, long);
- int finite (double);
- int fpclass (double);
-
- #endif /* Not _NO_OLDNAMES */
-
- #endif /* __STRICT_ANSI__ */
-
-
- #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)
-
-
- /* 7.12.3.1 */
- /*
- Return values for fpclassify.
- These are based on Intel x87 fpu condition codes
- in the high byte of status word and differ from
- the return values for MS IEEE 754 extension _fpclass()
- */
- #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 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 __fpclassifyf (float);
- extern int __fpclassify (double);
-
- extern __inline__ int __fpclassifyl (long double x){
- unsigned short sw;
- __asm__ ("fxam; fstsw %%ax;" : "=a" (sw): "t" (x));
- return sw & (FP_NAN | FP_NORMAL | FP_ZERO );
- }
-
- #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. */
-
- extern __inline__ int __isnan (double _x)
- {
- unsigned short sw;
- __asm__ ("fxam;"
- "fstsw %%ax": "=a" (sw) : "t" (_x));
- return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
- == FP_NAN;
- }
-
- extern __inline__ int __isnanf (float _x)
- {
- unsigned short sw;
- __asm__ ("fxam;"
- "fstsw %%ax": "=a" (sw) : "t" (_x));
- return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
- == FP_NAN;
- }
-
- extern __inline__ int __isnanl (long double _x)
- {
- unsigned short sw;
- __asm__ ("fxam;"
- "fstsw %%ax": "=a" (sw) : "t" (_x));
- return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
- == FP_NAN;
- }
-
-
- #define isnan(x) (sizeof (x) == sizeof (float) ? __isnanf (x) \
- : sizeof (x) == sizeof (double) ? __isnan (x) \
- : __isnanl (x))
-
- /* 7.12.3.5 */
- #define isnormal(x) (fpclassify(x) == FP_NORMAL)
-
- /* 7.12.3.6 The signbit macro */
- extern __inline__ int __signbit (double x) {
- unsigned short stw;
- __asm__ ( "fxam; fstsw %%ax;": "=a" (stw) : "t" (x));
- return stw & 0x0200;
- }
-
- extern __inline__ int __signbitf (float x) {
- unsigned short stw;
- __asm__ ("fxam; fstsw %%ax;": "=a" (stw) : "t" (x));
- return stw & 0x0200;
- }
- extern __inline__ int __signbitl (long double x) {
- unsigned short stw;
- __asm__ ("fxam; fstsw %%ax;": "=a" (stw) : "t" (x));
- return stw & 0x0200;
- }
-
-
- #define signbit(x) (sizeof (x) == sizeof (float) ? __signbitf (x) \
- : sizeof (x) == sizeof (double) ? __signbit (x) \
- : __signbitl (x))
-
- /* 7.12.4 Trigonometric functions: Double in C89 */
- extern float sinf (float);
- extern long double sinl (long double);
-
- extern float cosf (float);
- extern long double cosl (long double);
-
- extern float tanf (float);
- extern long double tanl (long double);
-
- extern float asinf (float);
- extern long double asinl (long double);
-
- extern float acosf (float);
- extern long double acosl (long double);
-
- extern float atanf (float);
- extern long double atanl (long double);
-
- extern float atan2f (float, float);
- extern long double atan2l (long double, long double);
-
- /* 7.12.5 Hyperbolic functions: Double in C89 */
- extern __inline__ float sinhf (float x)
- {return (float) sinh (x);}
- extern long double sinhl (long double);
-
- extern __inline__ float coshf (float x)
- {return (float) cosh (x);}
- extern long double coshl (long double);
-
- extern __inline__ float tanhf (float x)
- {return (float) tanh (x);}
- extern long double tanhl (long double);
-
- /*
- * TODO: asinh, acosh, atanh
- */
-
- /* 7.12.6.1 Double in C89 */
- extern __inline__ float expf (float x)
- {return (float) exp (x);}
- extern long double expl (long double);
-
- /* 7.12.6.2 */
- extern double exp2(double);
- extern float exp2f(float);
- extern long double exp2l(long double);
-
- /* 7.12.6.3 The expm1 functions: TODO */
-
- /* 7.12.6.4 Double in C89 */
- extern __inline__ float frexpf (float x, int* expn)
- {return (float) frexp (x, expn);}
- extern long double frexpl (long double, int*);
-
- /* 7.12.6.5 */
- #define FP_ILOGB0 ((int)0x80000000)
- #define FP_ILOGBNAN ((int)0x80000000)
- extern int ilogb (double);
- extern int ilogbf (float);
- extern int ilogbl (long double);
-
- /* 7.12.6.6 Double in C89 */
- extern __inline__ float ldexpf (float x, int expn)
- {return (float) ldexp (x, expn);}
- extern long double ldexpl (long double, int);
-
- /* 7.12.6.7 Double in C89 */
- extern float logf (float);
- extern long double logl (long double);
-
- /* 7.12.6.8 Double in C89 */
- extern float log10f (float);
- extern long double log10l (long double);
-
- /* 7.12.6.9 */
- extern double log1p(double);
- extern float log1pf(float);
- extern long double log1pl(long double);
-
- /* 7.12.6.10 */
- extern double log2 (double);
- extern float log2f (float);
- extern long double log2l (long double);
-
- /* 7.12.6.11 */
- extern double logb (double);
- extern float logbf (float);
- extern long double logbl (long double);
-
- extern __inline__ double logb (double x)
- {
- double res;
- __asm__ ("fxtract\n\t"
- "fstp %%st" : "=t" (res) : "0" (x));
- return res;
- }
-
- extern __inline__ float logbf (float x)
- {
- float res;
- __asm__ ("fxtract\n\t"
- "fstp %%st" : "=t" (res) : "0" (x));
- return res;
- }
-
- extern __inline__ long double logbl (long double x)
- {
- long double res;
- __asm__ ("fxtract\n\t"
- "fstp %%st" : "=t" (res) : "0" (x));
- return res;
- }
-
- /* 7.12.6.12 Double in C89 */
- extern float modff (float, float*);
- extern long double modfl (long double, long double*);
-
- /* 7.12.6.13 */
- extern double scalbn (double, int);
- extern float scalbnf (float, int);
- extern long double scalbnl (long double, int);
-
- extern double scalbln (double, long);
- extern float scalblnf (float, long);
- extern long double scalblnl (long double, long);
-
- /* 7.12.7.1 */
- /* Implementations adapted from Cephes versions */
- extern double cbrt (double);
- extern float cbrtf (float);
- extern long double cbrtl (long double);
-
- /* 7.12.7.2 The fabs functions: Double in C89 */
- extern __inline__ float fabsf (float x)
- {
- float res;
- __asm__ ("fabs;" : "=t" (res) : "0" (x));
- return res;
- }
-
- extern __inline__ long double fabsl (long double x)
- {
- long double res;
- __asm__ ("fabs;" : "=t" (res) : "0" (x));
- return res;
- }
-
- /* 7.12.7.3 */
- extern double hypot (double, double); /* in libmoldname.a */
- extern __inline__ float hypotf (float x, float y)
- { return (float) hypot (x, y);}
- extern long double hypotl (long double, long double);
-
- /* 7.12.7.4 The pow functions. Double in C89 */
- extern __inline__ float powf (float x, float y)
- {return (float) pow (x, y);}
- extern long double powl (long double, long double);
-
- /* 7.12.7.5 The sqrt functions. Double in C89. */
- extern float sqrtf (float);
- extern long double sqrtl (long double);
-
- /* 7.12.8.1 The erf functions */
- extern double erf (double);
- extern float erff (float);
- /* TODO
- extern long double erfl (long double);
- */
-
- /* 7.12.8.2 The erfc functions */
- extern double erfc (double);
- extern float erfcf (float);
- /* TODO
- extern long double erfcl (long double);
- */
-
- /* 7.12.8.3 The lgamma functions */
- extern double lgamma (double);
- extern float lgammaf (float);
- extern long double lgammal (long double);
-
- /* 7.12.8.4 The tgamma functions */
- extern double tgamma (double);
- extern float tgammaf (float);
- extern long double tgammal (long double);
-
- /* 7.12.9.1 Double in C89 */
- extern float ceilf (float);
- extern long double ceill (long double);
-
- /* 7.12.9.2 Double in C89 */
- extern float floorf (float);
- extern long double floorl (long double);
-
- /* 7.12.9.3 */
- extern double nearbyint ( double);
- extern float nearbyintf (float);
- extern long double nearbyintl (long double);
-
- /* 7.12.9.4 */
- /* round, using fpu control word settings */
- extern __inline__ double rint (double x)
- {
- double retval;
- __asm__ ("frndint;": "=t" (retval) : "0" (x));
- return retval;
- }
-
- extern __inline__ float rintf (float x)
- {
- float retval;
- __asm__ ("frndint;" : "=t" (retval) : "0" (x) );
- return retval;
- }
-
- extern __inline__ long double rintl (long double x)
- {
- long double retval;
- __asm__ ("frndint;" : "=t" (retval) : "0" (x) );
- return retval;
- }
-
- /* 7.12.9.5 */
- extern __inline__ long lrint (double x)
- {
- long retval;
- __asm__ __volatile__ \
- ("fistpl %0" : "=m" (retval) : "t" (x) : "st"); \
- return retval;
- }
-
- extern __inline__ long lrintf (float x)
- {
- long retval;
- __asm__ __volatile__ \
- ("fistpl %0" : "=m" (retval) : "t" (x) : "st"); \
- return retval;
- }
-
- extern __inline__ long lrintl (long double x)
- {
- long retval;
- __asm__ __volatile__ \
- ("fistpl %0" : "=m" (retval) : "t" (x) : "st"); \
- return retval;
- }
-
- extern __inline__ long long llrint (double x)
- {
- long long retval;
- __asm__ __volatile__ \
- ("fistpll %0" : "=m" (retval) : "t" (x) : "st"); \
- return retval;
- }
-
- extern __inline__ long long llrintf (float x)
- {
- long long retval;
- __asm__ __volatile__ \
- ("fistpll %0" : "=m" (retval) : "t" (x) : "st"); \
- return retval;
- }
-
- extern __inline__ long long llrintl (long double x)
- {
- long long retval;
- __asm__ __volatile__ \
- ("fistpll %0" : "=m" (retval) : "t" (x) : "st"); \
- return retval;
- }
-
- /* 7.12.9.6 */
- /* round away from zero, regardless of fpu control word settings */
- extern double round (double);
- extern float roundf (float);
- extern long double roundl (long double);
-
- /* 7.12.9.7 */
- extern long lround (double);
- extern long lroundf (float);
- extern long lroundl (long double);
-
- extern long long llround (double);
- extern long long llroundf (float);
- extern long long llroundl (long double);
-
- /* 7.12.9.8 */
- /* round towards zero, regardless of fpu control word settings */
- extern double trunc (double);
- extern float truncf (float);
- extern long double truncl (long double);
-
- /* 7.12.10.1 Double in C89 */
- extern float fmodf (float, float);
- extern long double fmodl (long double, long double);
-
- /* 7.12.10.2 */
- extern double remainder (double, double);
- extern float remainderf (float, float);
- extern long double remainderl (long double, long double);
-
- /* 7.12.10.3 */
- extern double remquo(double, double, int *);
- extern float remquof(float, float, int *);
- extern long double remquol(long double, long double, int *);
-
- /* 7.12.11.1 */
- extern double copysign (double, double); /* in libmoldname.a */
- extern float copysignf (float, float);
- extern long double copysignl (long double, long double);
-
- /* 7.12.11.2 Return a NaN */
- extern double nan(const char *tagp);
- extern float nanf(const char *tagp);
- extern long double nanl(const char *tagp);
-
- #ifndef __STRICT_ANSI__
- #define _nan() nan("")
- #define _nanf() nanf("")
- #define _nanl() nanl("")
- #endif
-
- /* 7.12.11.3 */
- extern double nextafter (double, double); /* in libmoldname.a */
- extern float nextafterf (float, float);
- /* TODO: Not yet implemented */
- /* extern long double 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 fdim (double x, double y);
- extern float fdimf (float x, float y);
- extern long double 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 fmax (double, double);
- extern float fmaxf (float, float);
- extern long double fmaxl (long double, long double);
-
- /* 7.12.12.3 */
- extern double fmin (double, double);
- extern float fminf (float, float);
- extern long double fminl (long double, long double);
-
- /* 7.12.13.1 */
- /* return x * y + z as a ternary op */
- extern double fma (double, double, double);
- extern float fmaf (float, float, float);
- extern long double fmal (long double, long double, long double);
-
-
- /* 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 */
- extern __inline__ int
- __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 /* __STDC_VERSION__ >= 199901L */
- #endif /* __NO_ISOCEXT */
-
-
- #ifdef __cplusplus
- }
- #endif
- #endif /* Not RC_INVOKED */
-
-
- #endif /* Not _MATH_H_ */
-