/* * float.h Floating point functions * * Copyright by WATCOM International Corp. 1988-1996. All rights reserved. */ #ifndef _FLOAT_H_INCLUDED #define _FLOAT_H_INCLUDED #if !defined(_ENABLE_AUTODEPEND) #pragma read_only_file; #endif #ifdef __cplusplus extern "C" { #endif #ifndef _COMDEF_H_INCLUDED #include <_comdef.h> #endif #define FLT_RADIX 2 #define FLT_ROUNDS 1 /* round to nearest */ /* number of base-FLT_RADIX digits in the floating point mantissa */ #define FLT_MANT_DIG 24 #define DBL_MANT_DIG 53 #define LDBL_MANT_DIG 53 /* number of decimal digits of precision */ #define FLT_DIG 6 #define DBL_DIG 15 #define LDBL_DIG 15 /* minimum negative integer such that FLT_RADIX raised to that power minus 1 is a normalized floating point number */ #define FLT_MIN_EXP (-127) #define DBL_MIN_EXP (-1023) #define LDBL_MIN_EXP (-1023) /* minimum negative integer such that 10 raised to that power is in the range of normalized floating point numbers */ #define FLT_MIN_10_EXP (-38) #define DBL_MIN_10_EXP (-307) #define LDBL_MIN_10_EXP (-307) /* maximum integer such that FLT_RADIX raised to that power minus 1 is a representable floating point number */ #define FLT_MAX_EXP 127 #define DBL_MAX_EXP 1023 #define LDBL_MAX_EXP 1023 /* maximum integer such that 10 raised to that power is in the range of representable floating point numbers */ #define FLT_MAX_10_EXP 38 #define DBL_MAX_10_EXP 308 #define LDBL_MAX_10_EXP 308 /* maximum representable floating point number */ #define FLT_MAX 3.402823466e+38f #define DBL_MAX 1.79769313486231500e+308 #define LDBL_MAX DBL_MAX /* minimum positive floating point number x such that 1.0 + x != 1.0 */ #define FLT_EPSILON 1.192092896e-7f #define DBL_EPSILON 2.22044604925031300e-016 #define LDBL_EPSILON DBL_EPSILON /* minimum representable positive floating point number */ #define FLT_MIN 1.175494351e-38f #define DBL_MIN 2.22507385850720200e-308 #define LDBL_MIN DBL_MIN /* * 8087/80287/80387 math co-processor control information */ /* 80(x)87 Control Word Mask and bit definitions. */ #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 result - 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_NEAR 0x0000 /* near */ #define _RC_DOWN 0x0400 /* down */ #define _RC_UP 0x0800 /* up */ #define _RC_CHOP 0x0c00 /* chop */ #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_53 \ | _EM_INVALID | _EM_DENORMAL | _EM_ZERODIVIDE \ | _EM_OVERFLOW | _EM_UNDERFLOW | _EM_INEXACT) /* 80(x)87 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) */ /* the following are generated by software */ #define _SW_UNEMULATED 0x0040 /* unemulated instruction */ /* invalid subconditions (_SW_INVALID also set) */ #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 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 #define _FPE_IOVERFLOW 0x8d /* issued on fist(p) when value is too large to be represented as integer */ #define _FPE_LOGERR 0x8e #define _FPE_MODERR 0x8f #if !defined(NO_EXT_KEYS) /* extensions enabled */ /* * 8087/80287/80387 math co-processor control information */ /* 80(x)87 Control Word Mask and bit definitions. */ #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 EM_PRECISION _EM_INEXACT /* WATCOM's name */ #define MCW_IC _MCW_IC #define IC_AFFINE _IC_AFFINE #define IC_PROJECTIVE _IC_PROJECTIVE #define MCW_RC _MCW_RC #define RC_NEAR _RC_NEAR #define RC_DOWN _RC_DOWN #define RC_UP _RC_UP #define RC_CHOP _RC_CHOP #define MCW_PC _MCW_PC #define PC_24 _PC_24 #define PC_53 _PC_53 #define PC_64 _PC_64 /* 80(x)87 Status Word bit definitions */ #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 /* the following are generated by software */ #define SW_UNEMULATED _SW_UNEMULATED #define SW_SQRTNEG _SW_SQRTNEG #define SW_STACKOVERFLOW _SW_STACKOVERFLOW #define SW_STACKUNDERFLOW _SW_STACKUNDERFLOW /* Floating-point error codes */ #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 #define FPE_IOVERFLOW _FPE_IOVERFLOW #define FPE_LOGERR _FPE_LOGERR #define FPE_MODERR _FPE_MODERR _WMRTLINK extern unsigned _clear87(void); _WCRTLINK extern unsigned _control87(unsigned,unsigned); _WCRTLINK extern void _fpreset(void); _WMRTLINK extern unsigned _status87(void); #endif #ifdef __cplusplus }; #endif #endif