Atlas - FLOAT.H
Home / ext / JunkDrawer / DOS / BuildTools / v4.0 / BLD / INC Lines: 1 | Size: 5874 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1/*** 2*float.h - constants for floating point values 3* 4* Copyright (c) 1985-1988, Microsoft Corporation. All rights reserved. 5* 6*Purpose: 7* This file contains defines for a number of implementation dependent 8* values which are commonly used by sophisticated numerical (floating 9* point) programs. 10* [ANSI] 11* 12*******************************************************************************/ 13 14 15#ifndef NO_EXT_KEYS /* extensions enabled */ 16 #define _CDECL cdecl 17#else /* extensions not enabled */ 18 #define _CDECL 19#endif /* NO_EXT_KEYS */ 20 21#define DBL_DIG 15 /* # of decimal digits of precision */ 22#define DBL_EPSILON 2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */ 23#define DBL_MANT_DIG 53 /* # of bits in mantissa */ 24#define DBL_MAX 1.7976931348623158e+308 /* max value */ 25#define DBL_MAX_10_EXP 308 /* max decimal exponent */ 26#define DBL_MAX_EXP 1024 /* max binary exponent */ 27#define DBL_MIN 2.2250738585072014e-308 /* min positive value */ 28#define DBL_MIN_10_EXP -307 /* min decimal exponent 29#define DBL_MIN_EXP -1021 /* min binary exponent */ 30#define DBL_RADIX 2 /* exponent radix */ 31#define DBL_ROUNDS 0 /* addition rounding: chops */ 32 33#define FLT_DIG 6 /* # of decimal digits of precision */ 34#define FLT_EPSILON 1.192092896e-07 /* smallest such that 1.0+FLT_EPSILON != 1.0 */ 35#define FLT_GUARD 0 36#define FLT_MANT_DIG 24 /* # of bits in mantissa */ 37#define FLT_MAX 3.402823466e+38 /* max value */ 38#define FLT_MAX_10_EXP 38 /* max decimal exponent */ 39#define FLT_MAX_EXP 128 /* max binary exponent */ 40#define FLT_MIN 1.175494351e-38 /* min positive value */ 41#define FLT_MIN_10_EXP -37 /* min decimal exponent */ 42#define FLT_MIN_EXP -125 /* min binary exponent */ 43#define FLT_NORMALIZE 0 44#define FLT_RADIX 2 /* exponent radix */ 45#define FLT_ROUNDS 0 /* addition rounding: chops */ 46 47#define LDBL_DIG DBL_DIG /* # of decimal digits of precision */ 48#define LDBL_EPSILON DBL_EPSILON /* smallest such that 1.0+LDBL_EPSILON != 1.0 */ 49#define LDBL_MANT_DIG DBL_MANT_DIG /* # of bits in mantissa */ 50#define LDBL_MAX DBL_MAX /* max value */ 51#define LDBL_MAX_10_EXP DBL_MAX_10_EXP /* max decimal exponent */ 52#define LDBL_MAX_EXP DBL_MAX_EXP /* max binary exponent */ 53#define LDBL_MIN DBL_MIN /* min positive value */ 54#define LDBL_MIN_10_EXP DBL_MIN_10_EXP /* min deimal exponent 55#define LDBL_MIN_EXP DBL_MIN_EXP /* min binary exponent */ 56#define LDBL_RADIX DBL_RADIX /* exponent radix */ 57#define LDBL_ROUNDS DBL_ROUNDS /* addition rounding: chops */ 58 59 60/* 61 * 8087/80287 math control information 62 */ 63 64 65/* User Control Word Mask and bit definitions. 66 * These definitions match the 8087/80287 67 */ 68 69#define MCW_EM 0x003f /* interrupt Exception Masks */ 70#define EM_INVALID 0x0001 /* invalid */ 71#define EM_DENORMAL 0x0002 /* denormal */ 72#define EM_ZERODIVIDE 0x0004 /* zero divide */ 73#define EM_OVERFLOW 0x0008 /* overflow */ 74#define EM_UNDERFLOW 0x0010 /* underflow */ 75#define EM_INEXACT 0x0020 /* inexact (precision) */ 76 77#define MCW_IC 0x1000 /* Infinity Control */ 78#define IC_AFFINE 0x1000 /* affine */ 79#define IC_PROJECTIVE 0x0000 /* projective */ 80 81#define MCW_RC 0x0c00 /* Rounding Control */ 82#define RC_CHOP 0x0c00 /* chop */ 83#define RC_UP 0x0800 /* up */ 84#define RC_DOWN 0x0400 /* down */ 85#define RC_NEAR 0x0000 /* near */ 86 87#define MCW_PC 0x0300 /* Precision Control */ 88#define PC_24 0x0000 /* 24 bits */ 89#define PC_53 0x0200 /* 53 bits */ 90#define PC_64 0x0300 /* 64 bits */ 91 92 93/* initial Control Word value */ 94 95#define CW_DEFAULT ( IC_AFFINE + RC_NEAR + PC_64 + EM_DENORMAL + EM_UNDERFLOW + EM_INEXACT ) 96 97 98/* user Status Word bit definitions */ 99 100#define SW_INVALID 0x0001 /* invalid */ 101#define SW_DENORMAL 0x0002 /* denormal */ 102#define SW_ZERODIVIDE 0x0004 /* zero divide */ 103#define SW_OVERFLOW 0x0008 /* overflow */ 104#define SW_UNDERFLOW 0x0010 /* underflow */ 105#define SW_INEXACT 0x0020 /* inexact (precision) */ 106 107 108/* invalid subconditions (SW_INVALID also set) */ 109 110#define SW_UNEMULATED 0x0040 /* unemulated instruction */ 111#define SW_SQRTNEG 0x0080 /* square root of a neg number */ 112#define SW_STACKOVERFLOW 0x0200 /* FP stack overflow */ 113#define SW_STACKUNDERFLOW 0x0400 /* FP stack underflow */ 114 115 116/* Floating point error signals and return codes */ 117 118#define FPE_INVALID 0x81 119#define FPE_DENORMAL 0x82 120#define FPE_ZERODIVIDE 0x83 121#define FPE_OVERFLOW 0x84 122#define FPE_UNDERFLOW 0x85 123#define FPE_INEXACT 0x86 124 125#define FPE_UNEMULATED 0x87 126#define FPE_SQRTNEG 0x88 127#define FPE_STACKOVERFLOW 0x8a 128#define FPE_STACKUNDERFLOW 0x8b 129 130#define FPE_EXPLICITGEN 0x8c /* raise( SIGFPE ); */ 131 132/* function prototypes */ 133 134unsigned int _CDECL _clear87(void); 135unsigned int _CDECL _control87(unsigned int,unsigned int); 136void _CDECL _fpreset(void); 137unsigned int _CDECL _status87(void); 138[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. 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