path: root/public/sdk/inc/crt/float.h

/***
*float.h - constants for floating point values
*
*	Copyright (c) 1985-1995, 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]
*
*       [Public]
*
****/

#if _MSC_VER > 1000
#pragma once
#endif

#ifndef _INC_FLOAT
#define _INC_FLOAT

#if !defined(_WIN32) && !defined(_MAC)
#error ERROR: Only Mac or Win32 targets supported!
#endif


#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 */

#ifndef _M_M68K
#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 */
#else
#define LDBL_DIG	18					/* # of decimal digits of precision */
#define LDBL_EPSILON	1.08420217248550443412e-019L 		/* smallest such that 1.0+LDBL_EPSILON != 1.0 */
#define LDBL_MANT_DIG	64					/* # of bits in mantissa */
#define LDBL_MAX	1.189731495357231765e+4932L  		/* max value */
#define LDBL_MAX_10_EXP 4932					/* max decimal exponent */
#define LDBL_MAX_EXP	16384					/* max binary exponent */
#define LDBL_MIN	3.3621031431120935063e-4932L 		/* min positive value */
#define LDBL_MIN_10_EXP (-4931) 				/* min decimal exponent */
#define LDBL_MIN_EXP	(-16381)				/* min binary exponent */
#define _LDBL_RADIX	2					/* exponent radix */
#define _LDBL_ROUNDS	1					/* addition rounding: near */
#endif

/* 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);

#ifndef _MAC
#define _clear87	_clearfp
#define _status87	_statusfp
#endif /* _MAC */

/*
 * Abstract User Control Word Mask and bit definitions
 */
#if !defined(_M_MPPC) && !defined(_M_M68K)
#define _MCW_EM 	0x0008001f		/* interrupt Exception Masks */
#else
#define _MCW_EM 	0x0000001f		/* interrupt Exception Masks */
#endif
#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 */
#if defined(_M_MPPC)
/*
 * PowerMac specific definitions(no precision control)
 */
#define _PC_64		0x00000000		/*    64 bits */
#define _PC_53		0x00000000		/*    53 bits */
#define _PC_24		0x00000000		/*    24 bits */
#else
#define _PC_64		0x00000000		/*    64 bits */
#define _PC_53		0x00010000		/*    53 bits */
#define _PC_24		0x00020000		/*    24 bits */
#endif

#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 */

#if	defined(_M_IX86)

#define _CW_DEFAULT ( _RC_NEAR + _PC_53 + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT + _EM_DENORMAL)

#elif	defined(_M_M68K) || defined(_M_MPPC)

#define _CW_DEFAULT ( _RC_NEAR + _PC_64 + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT )

#elif	defined(_M_MRX000) || defined (_M_ALPHA) || defined(_M_PPC)

#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 */

#if defined(_MT) || defined(_DLL)
_CRTIMP extern int * __cdecl __fpecode(void);
#define _fpecode	(*__fpecode())
#else	/* ndef _MT && ndef _DLL */
extern int _fpecode;
#endif	/* _MT || _DLL */

/* 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 */

#ifndef _MAC
#define clear87         _clear87
#define status87        _status87
#define control87       _control87
#endif /* _MAC */

#ifdef  _NTSDK
#define fpreset         _fpreset
#else   /* ndef _NTSDK */
_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 */