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linux-wdctools/include/float.h

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/* Copyright (C) 1993 by Zardoz Software, Inc. */
/*******************************************************************************
* FILE NAME: FLOAT.H
*
* TITLE: This File has data type definitions.
*
* DATA_RIGHTS: Western Design Center and R & C Services Proprietary
* Copyright(C) 1980-2004
* All rights reserved. Reproduction in any manner,
* in whole or in part, is strictly prohibited without
* the prior written approval of R & C Services or
* Western Design Center.
*
* DESCRIPTION: This file describes data type definitions used for MATH.H.
*
*
* SPECIAL CONSIDERATIONS:
* <None>
*
* AUTHOR: R. Greenthal
*
*
* CREATION DATE: Dec 25,2003
*
* REVISION HISTORY
* Name Date Description
* ------------ ---------- ----------------------------------------------
* R. Greenthal 12/16/2003 Initial
*
*******************************************************************************
*/
#ifndef __FLOAT_H
#define __FLOAT_H
/*
*=========================== CONSTANTS & MACROS ===============================
*/
/*--------------------------------------------------------------------------------
* / NAME
* / FLT_ROUNDS - rounding modes
* /
* / SYNOPSIS
* / #define FLT_ROUNT {-1,0,1,2,3}
* /
* / DESCRIPTION
* / FLT_ROUNDS indicates to the rounding mode for floats point values:
* / -1, undetermined
* / 0 toward zero
* / 1 to the nearest
* / 2 towards positive infinity
* / 3 towards negative infinity
* /
* / Notes
* / The floating-point representation in apeNEXT is inasmach as
* / fixed hardware-impemented, we might not need to redefind its
* / rounding modes. But at this prestage we cannot exclude the need
* / for rounding in certain claculation.
* /
* /----------------------------------------------------------------------------*/
#ifndef FLT_ROUNDS
#define FLT_ROUNDS -1
#endif
/*-------------------------------------------------------------------------------
* / NAME
* / FLT_EVAL_METHOD - evaluation formats
* /
* / SYNOPSIS
* / #define FLT_EVAL_METHOD {-1,0,1,2}
* /
* / DESCRIPTION
* / FLT_EVAL_METHOD defines the evaluation methos used to determine
* / the evaluation formats of all floating types. It defines the
* / precision/representation of operations proceeded with foating-point
* /
* / RETURN VALUE
* / None
* /
* / Notes
* / If-1, range and precision of evaluation are not determined.
* / If 0, all operations and constants will be
* / evaluated to the range and precisions of the current type.
* / If 1, all operations and constants of types
* / float and double will be evaluated to the range and precisions
* / of double (long double will be evaluated as long double also).
* / Also the product of two floating_complex
* / operands is represented in double _Complex format,
* / and its parts are evaluated to double.
* / If 2, all operations and constants will be
* / evaluated to the range and precision of long double.
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_EVAL_METHOD
#define FLT_EVAL_METHOD 0
#endif
/*----------------------------------------------------------------------------------
* / NAME
* / FLT_RADIX - (base) radix representation of the exponent
* /
* / SYNOPSIS
* / #define FLT_RADIX {2,8,10,16}
* /
* / DESCRIPTION
* / FLT_RADIX is the radix of exponent representing (or the base)
* / typically defined as 2 (binary),
* / but there are other definitions like 8, 10, 16
* / 8 is octal,
* / 10 is the normal decimal,
* / 16 is Hex, representations
* /
* / RETURN VALUE
* / None
* /
* / Notes
* /
* /----------------------------------------------------------------------------*/
#ifndef FLT_RADIX
#define FLT_RADIX 2
#endif
/*--------------------------------------------------------------------------------
* / NAME
* / FLT_MANT_DIG - number of base-FLT_RADIX digits
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / FLT_MANT_DIG defines the number of base-FLT_RADIX digits
* / in the floating-point significant p.
* /
* / RETURN VALUE
* / None
* /
* / Notes
* / It belongs to FLT_RADIX like DBL_MANT_DIG, LDBL_MANT_DIG.
* / According to EC 60559 FLT_MANT_DIG has 53 bit
* / (where mantissa is always less than 1)
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_MANT_DIG
#define FLT_MANT_DIG 24 // Number of Bits in the Mantissa
#endif
/*--------------------------------------------------------------------------------
* / NAME
* / DECIMAL_DIG - number of decimals
* /
* / SYNOPSIS
* / #define DECIMAL_DIG
* /
* / DESCRIPTION
* / Number of decimal digits, n, such that any floating-point
* / number in the widest supported floating type with pmax
* / radix b digits can be rounded to a floating-point number
* / with n decimal digits and back again without
* / change to the value.
* / [p * log_{10} b] if b is a power of 10
* / [1 + p * log_{10} b] otherwise
* /
* / RETURN VALUE
* / None
* /
* /-----------------------------------------------------------------------------*/
#undef DECIMAL_DIG
#if LDBL_MANT_DIG == 53
//#define DECIMAL_DIG 12
#define DECIMAL_DIG 17
#else
#define DECIMAL_DIG 36
#endif
/*--------------------------------------------------------------------------------
* / NAME
* / FLT_DIG - minimun negative interger for exponent in FLT_RADIX
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / FLT_DIG is the minimum negative integer value, q, such that
* / any floaring-point number with q decimal digits can be rounded
* / into a floating-point number with p radix b digits and back
* / again without change to the q decimal digits and the value
* / p*log_{10} b + 1 if b is a power of 10
* / [1 - p*log_{10} b] + 0 otherwise
* /
* / RETURN VALUE
* / None
* /
* / Notes
* / The value of this macro is supposed to be at least 6,
* / to satisfy ISO c
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_DIG
#define FLT_DIG 6 // The maximum number decimal digits (base-10) that can be represented without change after rounding
#endif
/*---------------------------------------------------------------------------------
* / NAME
* / FLT_MIN_EXP - minimun negative that FLT_RADIX to n-1
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / Minimum negative integer such that FLT_RADIX raised to that power
* / minus 1 is a normalized floating-point number e_{min},
* /
* / Notes
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_MIN_EXP
#define FLT_MIN_EXP -125 //The min integer value for an exponent in base 10
#endif
/*---------------------------------------------------------------------------------
* / NAME
* / FLT_MIN_10_EXP - ninimum negative integer for exponent in base 10
* /
* / SYNOPSIS
* / DESCRIPTION
* / FLT_MIN_10_EXP is the minimum negative integer value for an
* / exponent in base 10 (float)
* /
* / Note
* / Minimum int x such that 10**x is a normalised float
* / log_10 b^{e_min}
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_MIN_10_EXP
#define FLT_MIN_10_EXP -37 //The maximum integer value for an exponent in base 10
#endif
/*--------------------------------------------------------------------------------
* / NAME
* / FLT_MAX_10_EXP - maximum negative integer for exponent in base 10
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / FLT_MAX_10_EXP is the maximum negative integer value for an
* / exponent in base 10 (float)
* /
* / Note
* / Maximum int x such that 10**x is a normalised float
* / log_10 ([1-b^{-p}] b^{e_max})
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_MAX_10_EXP
#define FLT_MAX_10_EXP +38 //The maximum integer value for an exponent in base 10
#endif
/*--------------------------------------------------------------------------------
* / NAME
* / FLT_MAX_EXP - maximun negative that FLT_RADIX to n-1
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / FLT_MAX_EXP the maximum number n such that base to the power
* / of n-1 (float). The minimum negative integer value for an
* / exponent in base FLT_RADIX
* /
* / Notes
* / Maximum negative integer such that FLT_RADIX raised to that power
* / minus 1 is a normalized floating-point number e_{min},
* / In apeNEXT the exponent has 11 bit
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_MAX_EXP
#define FLT_MAX_EXP +128 //The maximum integer value for an exponent in base FLT_RADIX
#endif
/*---------------------------------------------------------------------------------
* / NAME
* / FLT_MAX - maximum normalized finite representable value
* / of type float
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / Maximum floating-point value
* /
* / Note
* / (1-b^{p}) b^{e_{max}}
* / (1.-pow(2.,-52.))*pow(2.,1023) =
* / 8.9884656743115775E+307
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_MAX
#define FLT_MAX 3.40282347E+38F //Maximum finite floating-point value
#endif
/*---------------------------------------------------------------------------------
* / NAME
* / FLT_MIN - minimum normalized finite representable value
* / of type float
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / Minimum floating-point value
* /
* / Note
* / b^{e_{min}-1} = pow(2., -1023)
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_MIN
#define FLT_MIN 1.17549435E-38F //Minimum floating-point value
#endif
/*--------------------------------------------------------------------------------
* / NAME
* / FLT_EPSELON - smallest number
* /
* / SYNOPSIS
* /
* / DESCRIPTION
* / FLT_EPSILON is smallest number x such that 1.0+x!=1.0 defined as
* / Least significant digit representable for floating-point.
* /
* / Note
* / Difference between 1.0 and the least value greater that
* / 1.0 that is reperesentable in the given floating-point type
* / (here double float)
* / b^{1-p} pow(2.,1-52) = pow(2.,-51)
* /
* /-----------------------------------------------------------------------------*/
#ifndef FLT_EPSILON
#define FLT_EPSILON 1.19209290E-07F //Least significant digit representable
#endif
/******************************************/
/* Double Precision Floating Point Limits */
/******************************************/
#define DBL_MANT_DIG 53 // Number of Bits in the Mantissa
#define DBL_EPSILON 2.2204460492503131E-16 //Least significant digit representable
#define DBL_DIG 15 // Number of Significant Digits
#define DBL_MIN_EXP -1021
#define DBL_MIN 2.225073858507201E-308
#define DBL_MIN_10_EXP -307
#define DBL_MAX_EXP +1024
#define DBL_MAX 1.797693134862316E+308
#define DBL_MAX_10_EXP +308
/***********************************************/
/* Long Double Precision Floating Point Limits */
/***********************************************/
#define LDBL_MANT_DIG 106 // Number of Bits in the Mantissa
#define LDBL_EPSILON 2.2204460492503131E-16L //Least significant digit representable
#define LDBL_DIG 15 // Number of Significant Digits
#define LDBL_MIN_EXP -1021
#define LDBL_MIN 2.225073858507201E-308L
#define LDBL_MIN_10_EXP -307
#define LDBL_MAX_EXP +1024
#define LDBL_MAX 1.797693134862316E+308L // 0x7FEFFFFFFFFFFFFF, 0x7C8FFFFFFFFFFFFF
#define LDBL_MAX_10_EXP +308
/* Follows IEEE standards for 128-bit floating point */
//#define LDBL_MANT_DIG 113
//#define LDBL_EPSILON 1.925929944387235853055977942584927319E-34L
//#define LDBL_DIG 33
//#define LDBL_MIN_EXP (-16381)
//#define LDBL_MIN 3.362103143112093506262677817321752603E-4932L
//#define LDBL_MIN_10_EXP (-4931)
//#define LDBL_MAX_EXP (+16384)
//#define LDBL_MAX 1.189731495357231765085759326628007016E+4932L
//#define LDBL_MAX_10_EXP (+4932)
#endif /* FLOAT_H */
#pragma Pop (List)
/**************************************************/
/* End of File FLOAT.H */
/**************************************************/
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