141 lines
4.8 KiB
C
141 lines
4.8 KiB
C
/***
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*float.h - constants for floating point values
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*
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* Copyright (c) 1985-1990, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* This file contains defines for a number of implementation dependent
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* values which are commonly used by sophisticated numerical (floating
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* point) programs.
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* [ANSI]
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*
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****/
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#if defined(_DLL) && !defined(_MT)
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#error Cannot define _DLL without _MT
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#endif
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#ifdef _MT
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#define _FAR_ _far
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#else
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#define _FAR_
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#endif
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#define DBL_DIG 15 /* # of decimal digits of precision */
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#define DBL_EPSILON 2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */
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#define DBL_MANT_DIG 53 /* # of bits in mantissa */
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#define DBL_MAX 1.7976931348623158e+308 /* max value */
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#define DBL_MAX_10_EXP 308 /* max decimal exponent */
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#define DBL_MAX_EXP 1024 /* max binary exponent */
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#define DBL_MIN 2.2250738585072014e-308 /* min positive value */
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#define DBL_MIN_10_EXP (-307) /* min decimal exponent */
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#define DBL_MIN_EXP (-1021) /* min binary exponent */
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#define DBL_RADIX 2 /* exponent radix */
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#define DBL_ROUNDS 1 /* addition rounding: near */
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#define FLT_DIG 7 /* # of decimal digits of precision */
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#define FLT_EPSILON 1.192092896e-07F /* smallest such that 1.0+FLT_EPSILON != 1.0 */
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#define FLT_GUARD 0
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#define FLT_MANT_DIG 24 /* # of bits in mantissa */
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#define FLT_MAX 3.402823466e+38F /* max value */
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#define FLT_MAX_10_EXP 38 /* max decimal exponent */
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#define FLT_MAX_EXP 128 /* max binary exponent */
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#define FLT_MIN 1.175494351e-38F /* min positive value */
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#define FLT_MIN_10_EXP (-37) /* min decimal exponent */
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#define FLT_MIN_EXP (-125) /* min binary exponent */
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#define FLT_NORMALIZE 0
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#define FLT_RADIX 2 /* exponent radix */
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#define FLT_ROUNDS 1 /* addition rounding: near */
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#define LDBL_DIG 19 /* # of decimal digits of precision */
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#define LDBL_EPSILON 5.4210108624275221706e-020 /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
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#define LDBL_MANT_DIG 64 /* # of bits in mantissa */
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#define LDBL_MAX 1.189731495357231765e+4932L /* max value */
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#define LDBL_MAX_10_EXP 4932 /* max decimal exponent */
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#define LDBL_MAX_EXP 16384 /* max binary exponent */
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#define LDBL_MIN 3.3621031431120935063e-4932L /* min positive value */
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#define LDBL_MIN_10_EXP (-4931) /* min decimal exponent */
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#define LDBL_MIN_EXP (-16381) /* min binary exponent */
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#define LDBL_RADIX 2 /* exponent radix */
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#define LDBL_ROUNDS 1 /* addition rounding: near */
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/*
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* 8087/80287 math control information
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*/
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/* User Control Word Mask and bit definitions.
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* These definitions match the 8087/80287
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*/
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#define MCW_EM 0x003f /* interrupt Exception Masks */
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#define EM_INVALID 0x0001 /* invalid */
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#define EM_DENORMAL 0x0002 /* denormal */
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#define EM_ZERODIVIDE 0x0004 /* zero divide */
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#define EM_OVERFLOW 0x0008 /* overflow */
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#define EM_UNDERFLOW 0x0010 /* underflow */
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#define EM_INEXACT 0x0020 /* inexact (precision) */
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#define MCW_IC 0x1000 /* Infinity Control */
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#define IC_AFFINE 0x1000 /* affine */
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#define IC_PROJECTIVE 0x0000 /* projective */
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#define MCW_RC 0x0c00 /* Rounding Control */
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#define RC_CHOP 0x0c00 /* chop */
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#define RC_UP 0x0800 /* up */
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#define RC_DOWN 0x0400 /* down */
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#define RC_NEAR 0x0000 /* near */
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#define MCW_PC 0x0300 /* Precision Control */
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#define PC_24 0x0000 /* 24 bits */
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#define PC_53 0x0200 /* 53 bits */
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#define PC_64 0x0300 /* 64 bits */
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/* initial Control Word value */
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#define CW_DEFAULT ( IC_AFFINE + RC_NEAR + PC_64 + EM_DENORMAL + EM_UNDERFLOW + EM_INEXACT )
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/* user Status Word bit definitions */
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#define SW_INVALID 0x0001 /* invalid */
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#define SW_DENORMAL 0x0002 /* denormal */
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#define SW_ZERODIVIDE 0x0004 /* zero divide */
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#define SW_OVERFLOW 0x0008 /* overflow */
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#define SW_UNDERFLOW 0x0010 /* underflow */
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#define SW_INEXACT 0x0020 /* inexact (precision) */
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/* invalid subconditions (SW_INVALID also set) */
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#define SW_UNEMULATED 0x0040 /* unemulated instruction */
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#define SW_SQRTNEG 0x0080 /* square root of a neg number */
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#define SW_STACKOVERFLOW 0x0200 /* FP stack overflow */
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#define SW_STACKUNDERFLOW 0x0400 /* FP stack underflow */
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/* Floating point error signals and return codes */
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#define FPE_INVALID 0x81
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#define FPE_DENORMAL 0x82
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#define FPE_ZERODIVIDE 0x83
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#define FPE_OVERFLOW 0x84
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#define FPE_UNDERFLOW 0x85
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#define FPE_INEXACT 0x86
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#define FPE_UNEMULATED 0x87
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#define FPE_SQRTNEG 0x88
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#define FPE_STACKOVERFLOW 0x8a
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#define FPE_STACKUNDERFLOW 0x8b
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#define FPE_EXPLICITGEN 0x8c /* raise( SIGFPE ); */
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/* function prototypes */
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unsigned int _FAR_ _cdecl _clear87(void);
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unsigned int _FAR_ _cdecl _control87(unsigned int, unsigned int);
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void _FAR_ _cdecl _fpreset(void);
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unsigned int _FAR_ _cdecl _status87(void);
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