Source code of Windows XP (NT5)
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/***
*float.h - constants for floating point values** Copyright (c) 1985-1994, Microsoft Corporation. All rights reserved.**Purpose:* This file contains defines for a number of implementation dependent* values which are commonly used by sophisticated numerical (floating* point) programs.* [ANSI]*****/
#ifndef _INC_FLOAT
#define _INC_FLOAT
#ifdef __cplusplus
extern "C" {#endif
/* Define _CRTAPI1 (for compatibility with the NT SDK) */
#ifndef _CRTAPI1
#if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
#define _CRTAPI1 __cdecl
#else
#define _CRTAPI1
#endif
#endif
/* Define _CRTAPI2 (for compatibility with the NT SDK) */
#ifndef _CRTAPI2
#if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
#define _CRTAPI2 __cdecl
#else
#define _CRTAPI2
#endif
#endif
/* Define _CRTIMP */
#ifndef _CRTIMP
#ifdef _NTSDK
/* definition compatible with NT SDK */#define _CRTIMP
#else /* ndef _NTSDK */
/* current definition */#ifdef _DLL
#define _CRTIMP __declspec(dllimport)
#else /* ndef _DLL */
#define _CRTIMP
#endif /* _DLL */
#endif /* _NTSDK */
#endif /* _CRTIMP */
/* Define __cdecl for non-Microsoft compilers */
#if ( !defined(_MSC_VER) && !defined(__cdecl) )
#define __cdecl
#endif
#define DBL_DIG 15 /* # of decimal digits of precision */
#define DBL_EPSILON 2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */
#define DBL_MANT_DIG 53 /* # of bits in mantissa */
#define DBL_MAX 1.7976931348623158e+308 /* max value */
#define DBL_MAX_10_EXP 308 /* max decimal exponent */
#define DBL_MAX_EXP 1024 /* max binary exponent */
#define DBL_MIN 2.2250738585072014e-308 /* min positive value */
#define DBL_MIN_10_EXP (-307) /* min decimal exponent */
#define DBL_MIN_EXP (-1021) /* min binary exponent */
#define _DBL_RADIX 2 /* exponent radix */
#define _DBL_ROUNDS 1 /* addition rounding: near */
#define FLT_DIG 6 /* # of decimal digits of precision */
#define FLT_EPSILON 1.192092896e-07F /* smallest such that 1.0+FLT_EPSILON != 1.0 */
#define FLT_GUARD 0
#define FLT_MANT_DIG 24 /* # of bits in mantissa */
#define FLT_MAX 3.402823466e+38F /* max value */
#define FLT_MAX_10_EXP 38 /* max decimal exponent */
#define FLT_MAX_EXP 128 /* max binary exponent */
#define FLT_MIN 1.175494351e-38F /* min positive value */
#define FLT_MIN_10_EXP (-37) /* min decimal exponent */
#define FLT_MIN_EXP (-125) /* min binary exponent */
#define FLT_NORMALIZE 0
#define FLT_RADIX 2 /* exponent radix */
#define FLT_ROUNDS 1 /* addition rounding: near */
#define LDBL_DIG DBL_DIG /* # of decimal digits of precision */
#define LDBL_EPSILON DBL_EPSILON /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
#define LDBL_MANT_DIG DBL_MANT_DIG /* # of bits in mantissa */
#define LDBL_MAX DBL_MAX /* max value */
#define LDBL_MAX_10_EXP DBL_MAX_10_EXP /* max decimal exponent */
#define LDBL_MAX_EXP DBL_MAX_EXP /* max binary exponent */
#define LDBL_MIN DBL_MIN /* min positive value */
#define LDBL_MIN_10_EXP DBL_MIN_10_EXP /* min decimal exponent */
#define LDBL_MIN_EXP DBL_MIN_EXP /* min binary exponent */
#define _LDBL_RADIX DBL_RADIX /* exponent radix */
#define _LDBL_ROUNDS DBL_ROUNDS /* addition rounding: near */
/* Function prototypes */
_CRTIMP unsigned int __cdecl _clearfp(void);_CRTIMP unsigned int __cdecl _controlfp(unsigned int,unsigned int);_CRTIMP unsigned int __cdecl _statusfp(void);_CRTIMP void __cdecl _fpreset(void);
#define _clear87 _clearfp
#define _status87 _statusfp
/*
* Abstract User Control Word Mask and bit definitions */
#define _MCW_EM 0x0008001f /* interrupt Exception Masks */
#define _EM_INEXACT 0x00000001 /* inexact (precision) */
#define _EM_UNDERFLOW 0x00000002 /* underflow */
#define _EM_OVERFLOW 0x00000004 /* overflow */
#define _EM_ZERODIVIDE 0x00000008 /* zero divide */
#define _EM_INVALID 0x00000010 /* invalid */
#define _MCW_RC 0x00000300 /* Rounding Control */
#define _RC_NEAR 0x00000000 /* near */
#define _RC_DOWN 0x00000100 /* down */
#define _RC_UP 0x00000200 /* up */
#define _RC_CHOP 0x00000300 /* chop */
/*
* Abstract User Status Word bit definitions */
#define _SW_INEXACT 0x00000001 /* inexact (precision) */
#define _SW_UNDERFLOW 0x00000002 /* underflow */
#define _SW_OVERFLOW 0x00000004 /* overflow */
#define _SW_ZERODIVIDE 0x00000008 /* zero divide */
#define _SW_INVALID 0x00000010 /* invalid */
/*
* i386 specific definitions */
#define _MCW_PC 0x00030000 /* Precision Control */
#define _PC_64 0x00000000 /* 64 bits */
#define _PC_53 0x00010000 /* 53 bits */
#define _PC_24 0x00020000 /* 24 bits */
#define _MCW_IC 0x00040000 /* Infinity Control */
#define _IC_AFFINE 0x00040000 /* affine */
#define _IC_PROJECTIVE 0x00000000 /* projective */
#define _EM_DENORMAL 0x00080000 /* denormal exception mask (_control87 only) */
#define _SW_DENORMAL 0x00080000 /* denormal status bit */
_CRTIMP unsigned int __cdecl _control87(unsigned int,unsigned int);
/*
* MIPS R4000 specific definitions */
#define _MCW_DN 0x01000000 /* Denormal Control (R4000) */
#define _DN_FLUSH 0x01000000 /* flush to zero */
#define _DN_SAVE 0x00000000 /* save */
/* initial Control Word value */
#ifdef _M_IX86
#define _CW_DEFAULT ( _RC_NEAR + _PC_64 + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT )
#elif defined(_M_MRX000) || defined (_M_ALPHA)
#define _CW_DEFAULT ( _RC_NEAR + _DN_FLUSH + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT )
#endif
/* Global variable holding floating point error code */
#ifdef _MT
_CRTIMP extern int * __cdecl __fpecode(void);#define _fpecode (*__fpecode())
#else
extern int _fpecode;#endif
/* invalid subconditions (_SW_INVALID also set) */
#define _SW_UNEMULATED 0x0040 /* unemulated instruction */
#define _SW_SQRTNEG 0x0080 /* square root of a neg number */
#define _SW_STACKOVERFLOW 0x0200 /* FP stack overflow */
#define _SW_STACKUNDERFLOW 0x0400 /* FP stack underflow */
/* Floating point error signals and return codes */
#define _FPE_INVALID 0x81
#define _FPE_DENORMAL 0x82
#define _FPE_ZERODIVIDE 0x83
#define _FPE_OVERFLOW 0x84
#define _FPE_UNDERFLOW 0x85
#define _FPE_INEXACT 0x86
#define _FPE_UNEMULATED 0x87
#define _FPE_SQRTNEG 0x88
#define _FPE_STACKOVERFLOW 0x8a
#define _FPE_STACKUNDERFLOW 0x8b
#define _FPE_EXPLICITGEN 0x8c /* raise( SIGFPE ); */
/* IEEE recommended functions */
_CRTIMP double __cdecl _copysign (double, double);_CRTIMP double __cdecl _chgsign (double);_CRTIMP double __cdecl _scalb(double, long);_CRTIMP double __cdecl _logb(double);_CRTIMP double __cdecl _nextafter(double, double);_CRTIMP int __cdecl _finite(double);_CRTIMP int __cdecl _isnan(double);_CRTIMP int __cdecl _fpclass(double);
#define _FPCLASS_SNAN 0x0001 /* signaling NaN */
#define _FPCLASS_QNAN 0x0002 /* quiet NaN */
#define _FPCLASS_NINF 0x0004 /* negative infinity */
#define _FPCLASS_NN 0x0008 /* negative normal */
#define _FPCLASS_ND 0x0010 /* negative denormal */
#define _FPCLASS_NZ 0x0020 /* -0 */
#define _FPCLASS_PZ 0x0040 /* +0 */
#define _FPCLASS_PD 0x0080 /* positive denormal */
#define _FPCLASS_PN 0x0100 /* positive normal */
#define _FPCLASS_PINF 0x0200 /* positive infinity */
#if !__STDC__
/* Non-ANSI names for compatibility */
#ifdef _NTSDK
#define clear87 _clear87
#define status87 _status87
#define control87 _control87
#define fpreset _fpreset
#else /* ndef _NTSDK */
_CRTIMP unsigned int __cdecl clear87(void);_CRTIMP unsigned int __cdecl control87(unsigned int,unsigned int);_CRTIMP unsigned int __cdecl status87(void);_CRTIMP void __cdecl fpreset(void);
#endif /* _NTSDK */
#define DBL_RADIX _DBL_RADIX
#define DBL_ROUNDS _DBL_ROUNDS
#define LDBL_RADIX _LDBL_RADIX
#define LDBL_ROUNDS _LDBL_ROUNDS
#define MCW_EM _MCW_EM
#define EM_INVALID _EM_INVALID
#define EM_DENORMAL _EM_DENORMAL
#define EM_ZERODIVIDE _EM_ZERODIVIDE
#define EM_OVERFLOW _EM_OVERFLOW
#define EM_UNDERFLOW _EM_UNDERFLOW
#define EM_INEXACT _EM_INEXACT
#define MCW_IC _MCW_IC
#define IC_AFFINE _IC_AFFINE
#define IC_PROJECTIVE _IC_PROJECTIVE
#define MCW_RC _MCW_RC
#define RC_CHOP _RC_CHOP
#define RC_UP _RC_UP
#define RC_DOWN _RC_DOWN
#define RC_NEAR _RC_NEAR
#define MCW_PC _MCW_PC
#define PC_24 _PC_24
#define PC_53 _PC_53
#define PC_64 _PC_64
#define CW_DEFAULT _CW_DEFAULT
#define SW_INVALID _SW_INVALID
#define SW_DENORMAL _SW_DENORMAL
#define SW_ZERODIVIDE _SW_ZERODIVIDE
#define SW_OVERFLOW _SW_OVERFLOW
#define SW_UNDERFLOW _SW_UNDERFLOW
#define SW_INEXACT _SW_INEXACT
#define SW_UNEMULATED _SW_UNEMULATED
#define SW_SQRTNEG _SW_SQRTNEG
#define SW_STACKOVERFLOW _SW_STACKOVERFLOW
#define SW_STACKUNDERFLOW _SW_STACKUNDERFLOW
#define FPE_INVALID _FPE_INVALID
#define FPE_DENORMAL _FPE_DENORMAL
#define FPE_ZERODIVIDE _FPE_ZERODIVIDE
#define FPE_OVERFLOW _FPE_OVERFLOW
#define FPE_UNDERFLOW _FPE_UNDERFLOW
#define FPE_INEXACT _FPE_INEXACT
#define FPE_UNEMULATED _FPE_UNEMULATED
#define FPE_SQRTNEG _FPE_SQRTNEG
#define FPE_STACKOVERFLOW _FPE_STACKOVERFLOW
#define FPE_STACKUNDERFLOW _FPE_STACKUNDERFLOW
#define FPE_EXPLICITGEN _FPE_EXPLICITGEN
#endif /* __STDC__ */
#ifdef __cplusplus
}#endif
#endif /* _INC_FLOAT */
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