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/*** |
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*float.h - constants for floating point values |
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* |
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* Copyright (c) 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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* [Public] |
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* |
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****/ |
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#if _MSC_VER > 1000 |
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#pragma once |
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#endif |
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#ifndef _INC_FLOAT |
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#define _INC_FLOAT |
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#include <crtdefs.h> |
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#include <crtwrn.h> |
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/* Define _CRT_MANAGED_FP_DEPRECATE */ |
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#ifndef _CRT_MANAGED_FP_DEPRECATE |
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#ifdef _CRT_MANAGED_FP_NO_DEPRECATE |
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#define _CRT_MANAGED_FP_DEPRECATE |
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#else |
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#if defined(_M_CEE) |
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#define _CRT_MANAGED_FP_DEPRECATE _CRT_DEPRECATE_TEXT("Direct floating point control is not supported or reliable from within managed code. ") |
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#else |
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#define _CRT_MANAGED_FP_DEPRECATE |
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#endif |
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#endif |
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#endif |
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#ifdef __cplusplus |
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extern "C" { |
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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 6 /* # 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 DBL_DIG /* # of decimal digits of precision */ |
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#define LDBL_EPSILON DBL_EPSILON /* smallest such that 1.0+LDBL_EPSILON != 1.0 */ |
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#define LDBL_MANT_DIG DBL_MANT_DIG /* # of bits in mantissa */ |
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#define LDBL_MAX DBL_MAX /* max value */ |
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#define LDBL_MAX_10_EXP DBL_MAX_10_EXP /* max decimal exponent */ |
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#define LDBL_MAX_EXP DBL_MAX_EXP /* max binary exponent */ |
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#define LDBL_MIN DBL_MIN /* min positive value */ |
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#define LDBL_MIN_10_EXP DBL_MIN_10_EXP /* min decimal exponent */ |
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#define LDBL_MIN_EXP DBL_MIN_EXP /* min binary exponent */ |
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#define _LDBL_RADIX DBL_RADIX /* exponent radix */ |
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#define _LDBL_ROUNDS DBL_ROUNDS /* addition rounding: near */ |
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/* Function prototypes */ |
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/* Reading or writing the floating point control/status words is not supported in managed code */ |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP unsigned int __cdecl _clearfp(void); |
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#pragma warning(push) |
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#pragma warning(disable: 4141) |
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_CRT_MANAGED_FP_DEPRECATE _CRT_INSECURE_DEPRECATE(_controlfp_s) _CRTIMP unsigned int __cdecl _controlfp(_In_ unsigned int _NewValue,_In_ unsigned int _Mask); |
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#pragma warning(pop) |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP void __cdecl _set_controlfp(_In_ unsigned int _NewValue, _In_ unsigned int _Mask); |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP errno_t __cdecl _controlfp_s(_Out_opt_ unsigned int *_CurrentState, _In_ unsigned int _NewValue, _In_ unsigned int _Mask); |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP unsigned int __cdecl _statusfp(void); |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP void __cdecl _fpreset(void); |
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#if defined(_M_IX86) |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP void __cdecl _statusfp2(_Out_opt_ unsigned int *_X86_status, _Out_opt_ unsigned int *_SSE2_status); |
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#endif |
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#define _clear87 _clearfp |
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#define _status87 _statusfp |
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/* |
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* Abstract User Status Word bit definitions |
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*/ |
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#define _SW_INEXACT 0x00000001 /* inexact (precision) */ |
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#define _SW_UNDERFLOW 0x00000002 /* underflow */ |
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#define _SW_OVERFLOW 0x00000004 /* overflow */ |
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#define _SW_ZERODIVIDE 0x00000008 /* zero divide */ |
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#define _SW_INVALID 0x00000010 /* invalid */ |
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#define _SW_DENORMAL 0x00080000 /* denormal status bit */ |
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/* |
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* New Control Bit that specifies the ambiguity in control word. |
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*/ |
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#define _EM_AMBIGUIOUS 0x80000000 /* for backwards compatibility old spelling */ |
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#define _EM_AMBIGUOUS 0x80000000 |
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/* |
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* Abstract User Control Word Mask and bit definitions |
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*/ |
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#define _MCW_EM 0x0008001f /* interrupt Exception Masks */ |
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#define _EM_INEXACT 0x00000001 /* inexact (precision) */ |
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#define _EM_UNDERFLOW 0x00000002 /* underflow */ |
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#define _EM_OVERFLOW 0x00000004 /* overflow */ |
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#define _EM_ZERODIVIDE 0x00000008 /* zero divide */ |
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#define _EM_INVALID 0x00000010 /* invalid */ |
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#define _EM_DENORMAL 0x00080000 /* denormal exception mask (_control87 only) */ |
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#define _MCW_RC 0x00000300 /* Rounding Control */ |
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#define _RC_NEAR 0x00000000 /* near */ |
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#define _RC_DOWN 0x00000100 /* down */ |
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#define _RC_UP 0x00000200 /* up */ |
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#define _RC_CHOP 0x00000300 /* chop */ |
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/* |
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* i386 specific definitions |
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*/ |
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#define _MCW_PC 0x00030000 /* Precision Control */ |
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#define _PC_64 0x00000000 /* 64 bits */ |
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#define _PC_53 0x00010000 /* 53 bits */ |
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#define _PC_24 0x00020000 /* 24 bits */ |
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#define _MCW_IC 0x00040000 /* Infinity Control */ |
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#define _IC_AFFINE 0x00040000 /* affine */ |
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#define _IC_PROJECTIVE 0x00000000 /* projective */ |
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/* |
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* RISC specific definitions |
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*/ |
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#define _MCW_DN 0x03000000 /* Denormal Control */ |
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#define _DN_SAVE 0x00000000 /* save denormal results and operands */ |
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#define _DN_FLUSH 0x01000000 /* flush denormal results and operands to zero */ |
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#define _DN_FLUSH_OPERANDS_SAVE_RESULTS 0x02000000 /* flush operands to zero and save results */ |
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#define _DN_SAVE_OPERANDS_FLUSH_RESULTS 0x03000000 /* save operands and flush results to zero */ |
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/* initial Control Word value */ |
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#if defined(_M_IX86) |
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#define _CW_DEFAULT ( _RC_NEAR + _PC_53 + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT + _EM_DENORMAL) |
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#elif defined(_M_IA64) |
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#define _CW_DEFAULT ( _RC_NEAR + _PC_64 + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT + _EM_DENORMAL) |
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#elif defined(_M_AMD64) |
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#define _CW_DEFAULT ( _RC_NEAR + _EM_INVALID + _EM_ZERODIVIDE + _EM_OVERFLOW + _EM_UNDERFLOW + _EM_INEXACT + _EM_DENORMAL) |
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#endif |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP unsigned int __cdecl _control87(_In_ unsigned int _NewValue,_In_ unsigned int _Mask); |
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#if defined(_M_IX86) |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP int __cdecl __control87_2(_In_ unsigned int _NewValue, _In_ unsigned int _Mask, |
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_Out_opt_ unsigned int* _X86_cw, _Out_opt_ unsigned int* _Sse2_cw); |
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#endif |
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/* Global variable holding floating point error code */ |
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#if defined(_MT) || defined(_DLL) |
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_Check_return_ _CRTIMP extern int * __cdecl __fpecode(void); |
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#define _fpecode (*__fpecode()) |
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#else /* ndef _MT && ndef _DLL */ |
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extern int _fpecode; |
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#endif /* _MT || _DLL */ |
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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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/* IEEE recommended functions */ |
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#ifndef _SIGN_DEFINED |
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_Check_return_ _CRTIMP double __cdecl _copysign (_In_ double _Number, _In_ double _Sign); |
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_Check_return_ _CRTIMP double __cdecl _chgsign (_In_ double _X); |
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#define _SIGN_DEFINED |
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#endif |
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_Check_return_ _CRTIMP double __cdecl _scalb(_In_ double _X, _In_ long _Y); |
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_Check_return_ _CRTIMP double __cdecl _logb(_In_ double _X); |
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_Check_return_ _CRTIMP double __cdecl _nextafter(_In_ double _X, _In_ double _Y); |
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_Check_return_ _CRTIMP int __cdecl _finite(_In_ double _X); |
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_Check_return_ _CRTIMP int __cdecl _isnan(_In_ double _X); |
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_Check_return_ _CRTIMP int __cdecl _fpclass(_In_ double _X); |
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#ifdef _M_AMD64 |
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_Check_return_ _CRTIMP float __cdecl _scalbf(_In_ float _X, _In_ long _Y); |
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#endif |
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#define _FPCLASS_SNAN 0x0001 /* signaling NaN */ |
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#define _FPCLASS_QNAN 0x0002 /* quiet NaN */ |
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#define _FPCLASS_NINF 0x0004 /* negative infinity */ |
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#define _FPCLASS_NN 0x0008 /* negative normal */ |
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#define _FPCLASS_ND 0x0010 /* negative denormal */ |
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#define _FPCLASS_NZ 0x0020 /* -0 */ |
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#define _FPCLASS_PZ 0x0040 /* +0 */ |
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#define _FPCLASS_PD 0x0080 /* positive denormal */ |
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#define _FPCLASS_PN 0x0100 /* positive normal */ |
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#define _FPCLASS_PINF 0x0200 /* positive infinity */ |
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#if !__STDC__ |
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/* Non-ANSI names for compatibility */ |
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#define clear87 _clear87 |
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#define status87 _status87 |
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#define control87 _control87 |
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_CRT_MANAGED_FP_DEPRECATE _CRTIMP void __cdecl fpreset(void); |
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#define DBL_RADIX _DBL_RADIX |
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#define DBL_ROUNDS _DBL_ROUNDS |
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#define LDBL_RADIX _LDBL_RADIX |
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#define LDBL_ROUNDS _LDBL_ROUNDS |
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#define EM_AMBIGUIOUS _EM_AMBIGUOUS /* for backwards compatibility old spelling */ |
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#define EM_AMBIGUOUS _EM_AMBIGUOUS |
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#define MCW_EM _MCW_EM |
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#define EM_INVALID _EM_INVALID |
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#define EM_DENORMAL _EM_DENORMAL |
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#define EM_ZERODIVIDE _EM_ZERODIVIDE |
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#define EM_OVERFLOW _EM_OVERFLOW |
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#define EM_UNDERFLOW _EM_UNDERFLOW |
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#define EM_INEXACT _EM_INEXACT |
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#define MCW_IC _MCW_IC |
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#define IC_AFFINE _IC_AFFINE |
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#define IC_PROJECTIVE _IC_PROJECTIVE |
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