/*** *float.h - constants for floating point values * * Copyright (c) 1985-1993, 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] * *Revision History: * 08-05-87 PHG added comments * 12-11-87 JCR Added "_loadds" functionality * 12-18-87 JCR Added _FAR_ to declarations * 02-10-88 JCR Cleaned up white space * 07-12-88 JCR Added some close comment delimeters (bug fix) * 08-22-88 GJF Modified to also work with the 386 (small model only) * 12-16-88 GJF Changed [FLT|DBL|LDBL]_ROUNDS to 1 * 04-28-89 SKS Put parentheses around negative constants * 05-03-89 JCR Added _INTERNAL_IFSTRIP for relinc usage * 08-03-89 GJF Cleanup, now specific to OS/2 2.0 (i.e., 386 flat model) * 10-20-89 KRS Add 'F' to FLT_MAX/MIN/EPSILON consts like in ANSI spec. * 10-30-89 GJF Fixed copyright * 11-02-89 JCR Changed "DLL" to "_DLL" * 02-28-90 GJF Added #ifndef _INC_FLOAT and #include * stuff. Also, removed some (now) useless preprocessor * directives. * 03-22-90 GJF Replaced _cdecl with _CALLTYPE2 (for now). * 08-17-90 WAJ Floating point routines now use _stdcall. * 09-25-90 GJF Added _fpecode stuff. * 08-20-91 JCR C++ and ANSI naming * 02-03-91 GDP Added definitions for MIPS * 04-03-92 GDP Use abstract control word definitions for all platforms * Removed Infinity Control, [EM|SW]_DENORMAL, SW_SQRTNEG * 04-14-92 GDP Added Inf. control, [EM|SW]_DENORMAL, SW_SQRTNEG again * 05-07-92 GDP Added IEEE recommended functions * 08-06-92 GJF Function calling type and variable type macros. Also * revised compiler/target processor macro usage. * 09-16-92 GJF Added _CRTAPI1 to _copysign - _fpclass prototypes. * 11-09-92 GJF Fixed preprocessing conditionals for MIPS. * 01-03-93 SRW Fold in ALPHA changes * 01-09-93 SRW Remove usage of MIPS and ALPHA to conform to ANSI * Use _MIPS_ and _ALPHA_ instead. * 01-21-93 GJF Removed support for C6-386's _cdecl. * ****/ #ifndef _INC_FLOAT #ifdef __cplusplus extern "C" { #endif #ifndef _INTERNAL_IFSTRIP_ #include #endif /* _INTERNAL_IFSTRIP_ */ /* * Conditional macro definition for function calling type and variable type * qualifiers. */ #if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) ) /* * Definitions for MS C8-32 (386/486) compiler */ #define _CRTAPI1 __cdecl #define _CRTAPI2 __cdecl #else /* * Other compilers (e.g., MIPS) */ #define _CRTAPI1 #define _CRTAPI2 #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 */ #ifdef _WIN32_ #ifndef _DOSX32_ /* function prototypes */ unsigned int _CRTAPI1 _clearfp(void); unsigned int _CRTAPI1 _controlfp(unsigned int,unsigned int); unsigned int _CRTAPI1 _statusfp(void); void _CRTAPI1 _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 */ unsigned int _CRTAPI1 _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) || 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 */ #ifdef MTHREAD extern int * _CRTAPI1 __fpecode(void); #define _fpecode (*__fpecode()) #else extern int _CRTVAR1 _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 */ double _CRTAPI1 _copysign (double, double); double _CRTAPI1 _chgsign (double); double _CRTAPI1 _scalb(double, long); double _CRTAPI1 _logb(double); double _CRTAPI1 _nextafter(double, double); int _CRTAPI1 _finite(double); int _CRTAPI1 _isnan(double); int _CRTAPI1 _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 */ #define clear87 _clear87 #define status87 _status87 #define control87 _control87 #define fpreset _fpreset #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__ */ #else /* _DOSX32_ */ /* * 8087/80287 math control information */ /* User Control Word Mask and bit definitions. * These definitions match the 8087/80287 */ #define _MCW_EM 0x003f /* interrupt Exception Masks */ #define _EM_INVALID 0x0001 /* invalid */ #define _EM_DENORMAL 0x0002 /* denormal */ #define _EM_ZERODIVIDE 0x0004 /* zero divide */ #define _EM_OVERFLOW 0x0008 /* overflow */ #define _EM_UNDERFLOW 0x0010 /* underflow */ #define _EM_INEXACT 0x0020 /* inexact (precision) */ #define _MCW_IC 0x1000 /* Infinity Control */ #define _IC_AFFINE 0x1000 /* affine */ #define _IC_PROJECTIVE 0x0000 /* projective */ #define _MCW_RC 0x0c00 /* Rounding Control */ #define _RC_CHOP 0x0c00 /* chop */ #define _RC_UP 0x0800 /* up */ #define _RC_DOWN 0x0400 /* down */ #define _RC_NEAR 0x0000 /* near */ #define _MCW_PC 0x0300 /* Precision Control */ #define _PC_24 0x0000 /* 24 bits */ #define _PC_53 0x0200 /* 53 bits */ #define _PC_64 0x0300 /* 64 bits */ /* initial Control Word value */ #define _CW_DEFAULT ( _IC_AFFINE + _RC_NEAR + _PC_64 + _EM_DENORMAL + _EM_UNDERFLOW + _EM_INEXACT ) /* user Status Word bit definitions */ #define _SW_INVALID 0x0001 /* invalid */ #define _SW_DENORMAL 0x0002 /* denormal */ #define _SW_ZERODIVIDE 0x0004 /* zero divide */ #define _SW_OVERFLOW 0x0008 /* overflow */ #define _SW_UNDERFLOW 0x0010 /* underflow */ #define _SW_INEXACT 0x0020 /* inexact (precision) */ /* 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 */ /* function prototypes */ unsigned int _CRTAPI1 _clear87(void); unsigned int _CRTAPI1 _control87(unsigned int,unsigned int); void _CRTAPI1 _fpreset(void); unsigned int _CRTAPI1 _status87(void); /* Global variable holding floating point error code */ #ifdef MTHREAD extern int * _CRTAPI1 __fpecode(void); #define _fpecode (*__fpecode()) #else extern int _CRTVAR1 _fpecode; #endif /* 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 ); */ #if !__STDC__ /* Non-ANSI names for compatibility */ #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__ */ #endif /* _DOSX32_ */ #else #error ERROR - ONLY WIN32 TARGET SUPPORTED! #endif /* _WIN32_ */ #ifdef __cplusplus } #endif #define _INC_FLOAT #endif /* _INC_FLOAT */