145 lines
5.9 KiB
C
145 lines
5.9 KiB
C
/* float.h - 8087 control function prototypes
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* $Version: 1.14 $
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* Copyright (c) 1988-91 Intel Corporation, ALL RIGHTS RESERVED.
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*/
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#ifndef _floath
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#define _floath
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/*lint -library */
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#define DBL_DIG 15 /* maximum decimal digits of double precision */
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#define DBL_EPSILON 2.2204460492503131e-16
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#define DBL_MANT_DIG 53
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#define DBL_MAX 1.7976931348623157e+308
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#define DBL_MAX_10_EXP 308
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#define DBL_MAX_EXP 1024
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#define DBL_MIN 2.2250738585072014e-308
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#define DBL_MIN_10_EXP (-307)
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#define DBL_MIN_EXP (-1021)
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#define DBL_RADIX 2 /* Radix of the floating-point number */
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/* e.g., a binary machine */
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#define DBL_ROUNDS 1
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#define FLT_DIG 6 /* maximum decimal digits of float precision */
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#define FLT_EPSILON 1.19209290e-7F
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#define FLT_MANT_DIG 24
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#define FLT_MAX 3.40282347e+38F
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#define FLT_MAX_10_EXP 38
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#define FLT_MAX_EXP 128
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#define FLT_MIN 1.17549435e-38F
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#define FLT_MIN_10_EXP (-37)
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#define FLT_MIN_EXP (-125)
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#define FLT_RADIX 2 /* radix of the floating point number /*
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/* e.g. a binary machine */
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#define FLT_ROUNDS 1 /* 1 == round to nearest */
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/*****************************************************************************
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** These values are full IEEE/ANSI defined, but are not supported under iC386.
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** Since Long Double is not supported under iC386, these values will be
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** defined as the same as DBL, above.
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******************************************************************************/
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#if 0
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#define LDBL_DIG 18 /* max decimal digits of long double precisn */
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#define LDBL_EPSILON 1.08420217248550443401e-19L
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#define LDBL_MANT_DIG 64
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#define LDBL_MAX 1.18973149535723176502e+4932L
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#define LDBL_MAX_10_EXP 4932
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#define LDBL_MAX_EXP 16384
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#define LDBL_MIN 3.36210314311209350626e-4932L /* relatively close */
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#define LDBL_MIN_10_EXP (-4931)
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#define LDBL_MIN_EXP (-16381)
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#define LDBL_RADIX 2 /* Radix of the floating-point number */
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/* e.g., a binary machine */
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#define LDBL_ROUNDS 1
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#else
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#define LDBL_DIG DBL_DIG
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#define LDBL_EPSILON DBL_EPSILON
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#define LDBL_MANT_DIG DBL_MANT_DIG
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#define LDBL_MAX DBL_MAX
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#define LDBL_MAX_10_EXP DBL_MAX_10_EXP
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#define LDBL_MAX_EXP DBL_MAX_EXP
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#define LDBL_MIN DBL_MIN
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#define LDBL_MIN_10_EXP DBL_MIN_10_EXP
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#define LDBL_MIN_EXP DBL_MIN_EXP
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#define LDBL_RADIX 2 /* Radix of the floating-point number */
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/* e.g., a binary machine */
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#define LDBL_ROUNDS 1
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#endif
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/*
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* Numeric coprocessor configuration constants:
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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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#define CW_DEFAULT (IC_AFFINE + RC_NEAR + PC_64 + EM_INVALID + EM_DENORMAL + \
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EM_ZERODIVIDE + EM_OVERFLOW + EM_UNDERFLOW + EM_INEXACT)
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/*
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* User status word:
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*/
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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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#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 /* Floating-point stack overflow */
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#define SW_STACKUNDERFLOW 0x0400 /* Floating-point stack underflow */
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/*
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* Floating-point error signals and return codes:
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*/
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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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/*
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* Function prototypes:
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*/
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#ifndef _87_functions
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#define _87_functions
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unsigned int _control87(unsigned int, unsigned int);
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void _fpreset(void);
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#endif
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#endif /* _floath */
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