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/* |
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* float.h |
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* This file has no copyright assigned and is placed in the Public Domain. |
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* This file is part of the mingw-runtime package. |
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* No warranty is given; refer to the file DISCLAIMER.PD within the package. |
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* |
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* Constants related to floating point arithmetic. |
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* |
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* Also included here are some non-ANSI bits for accessing the floating |
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* point controller. |
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* |
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*/ |
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|
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#if defined(__LIBMSVCRT__) |
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/* When building mingw-w64, this should be blank. */ |
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#define _SECIMP |
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#else |
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#ifndef _SECIMP |
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#define _SECIMP __declspec(dllimport) |
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#endif /* _SECIMP */ |
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#endif /* defined(_CRTBLD) || defined(__LIBMSVCRT__) */ |
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|
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#if (defined (__GNUC__) && defined (__GNUC_MINOR__)) \ |
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|| (defined(__clang__) && defined(__clang_major__)) |
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#if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)) \ |
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|| (__clang_major__ >=3) |
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#if !defined(_FLOAT_H___) && !defined(__FLOAT_H) && !defined(__CLANG_FLOAT_H) |
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#include_next <float.h> |
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#endif |
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#elif !defined (_FLOAT_H___) |
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#if (__GNUC__ < 4) |
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#error Corrupt install of gcc-s internal headers, or search order was changed. |
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#else |
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/* #include_next <float_ginclude.h> */ |
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|
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/* Number of decimal digits, q, such that any floating-point number with q |
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decimal digits can be rounded into a floating-point number with p radix b |
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digits and back again without change to the q decimal digits, |
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|
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p * log10(b) if b is a power of 10 |
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floor((p - 1) * log10(b)) otherwise |
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*/ |
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#undef FLT_DIG |
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#undef DBL_DIG |
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#undef LDBL_DIG |
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#define FLT_DIG __FLT_DIG__ |
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#define DBL_DIG __DBL_DIG__ |
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#define LDBL_DIG __LDBL_DIG__ |
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|
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|
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/* Maximum representable finite floating-point number, |
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|
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(1 - b**-p) * b**emax |
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*/ |
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#undef FLT_MAX |
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#undef DBL_MAX |
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#undef LDBL_MAX |
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#define FLT_MAX __FLT_MAX__ |
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#define DBL_MAX __DBL_MAX__ |
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#define LDBL_MAX __LDBL_MAX__ |
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|
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|
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/* Minimum normalized positive floating-point number, b**(emin - 1). */ |
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#undef FLT_MIN |
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#undef DBL_MIN |
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#undef LDBL_MIN |
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#define FLT_MIN __FLT_MIN__ |
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#define DBL_MIN __DBL_MIN__ |
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#define LDBL_MIN __LDBL_MIN__ |
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|
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/* Needed for libjava building - Victor K. */ |
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|
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/* Radix of exponent representation, b. */ |
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#undef FLT_RADIX |
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#define FLT_RADIX __FLT_RADIX__ |
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|
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/* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */ |
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#undef FLT_MIN_EXP |
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#undef DBL_MIN_EXP |
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#undef LDBL_MIN_EXP |
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#define FLT_MIN_EXP __FLT_MIN_EXP__ |
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#define DBL_MIN_EXP __DBL_MIN_EXP__ |
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#define LDBL_MIN_EXP __LDBL_MIN_EXP__ |
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|
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/* Minimum negative integer such that 10 raised to that power is in the |
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range of normalized floating-point numbers, |
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|
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ceil(log10(b) * (emin - 1)) |
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*/ |
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#undef FLT_MIN_10_EXP |
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#undef DBL_MIN_10_EXP |
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#undef LDBL_MIN_10_EXP |
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#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ |
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#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ |
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#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ |
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|
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/* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax. */ |
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#undef FLT_MAX_EXP |
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#undef DBL_MAX_EXP |
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#undef LDBL_MAX_EXP |
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#define FLT_MAX_EXP __FLT_MAX_EXP__ |
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#define DBL_MAX_EXP __DBL_MAX_EXP__ |
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#define LDBL_MAX_EXP __LDBL_MAX_EXP__ |
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|
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/* Maximum integer such that 10 raised to that power is in the range of |
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representable finite floating-point numbers, |
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|
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floor(log10((1 - b**-p) * b**emax)) |
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*/ |
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#undef FLT_MAX_10_EXP |
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#undef DBL_MAX_10_EXP |
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#undef LDBL_MAX_10_EXP |
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#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ |
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#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ |
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#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ |
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|
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/* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown. */ |
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/* ??? This is supposed to change with calls to fesetround in <fenv.h>. */ |
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#undef FLT_ROUNDS |
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#define FLT_ROUNDS 1 |
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|
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#undef FLT_EPSILON |
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#undef DBL_EPSILON |
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#undef LDBL_EPSILON |
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#define FLT_EPSILON __FLT_EPSILON__ |
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#define DBL_EPSILON __DBL_EPSILON__ |
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#define LDBL_EPSILON __LDBL_EPSILON__ |
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|
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#define _FLOAT_H___ |
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#endif |
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#endif |
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#endif |
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|
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#ifndef _MINGW_FLOAT_H_ |
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#define _MINGW_FLOAT_H_ |
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|
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/* All the headers include this file. */ |
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#include <crtdefs.h> |
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|
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/* |
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* Functions and definitions for controlling the FPU. |
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*/ |
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|
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/* TODO: These constants are only valid for x86 machines */ |
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|
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/* Control word masks for unMask */ |
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#define _MCW_DN 0x03000000 /* Denormal control */ |
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#define _MCW_EM 0x0008001F /* Error masks */ |
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#define _MCW_IC 0x00040000 /* Infinity */ |
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#define _MCW_RC 0x00000300 /* Rounding */ |
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#define _MCW_PC 0x00030000 /* Precision */ |
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|
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/* Number of base-FLT_RADIX digits in the significand, p. */ |
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#undef FLT_MANT_DIG |
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#undef DBL_MANT_DIG |
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#undef LDBL_MANT_DIG |
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#define FLT_MANT_DIG __FLT_MANT_DIG__ |
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#define DBL_MANT_DIG __DBL_MANT_DIG__ |
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#define LDBL_MANT_DIG __LDBL_MANT_DIG__ |
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|
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#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L |
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/* The floating-point expression evaluation method. |
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-1 indeterminate |
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0 evaluate all operations and constants just to the range and |
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precision of the type |
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1 evaluate operations and constants of type float and double |
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to the range and precision of the double type, evaluate |
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long double operations and constants to the range and |
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precision of the long double type |
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2 evaluate all operations and constants to the range and |
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precision of the long double type |
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|
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??? This ought to change with the setting of the fp control word; |
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the value provided by the compiler assumes the widest setting. */ |
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#undef FLT_EVAL_METHOD |
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#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ |
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|
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#endif /* C99 */ |
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|
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|
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/* Control word values for unNew (use with related unMask above) */ |
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#define _DN_SAVE 0x00000000 |
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#define _DN_FLUSH 0x01000000 |
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#define _EM_INVALID 0x00000010 |
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#define _EM_DENORMAL 0x00080000 |
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#define _EM_ZERODIVIDE 0x00000008 |
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#define _EM_OVERFLOW 0x00000004 |
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#define _EM_UNDERFLOW 0x00000002 |
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#define _EM_INEXACT 0x00000001 |
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#define _IC_AFFINE 0x00040000 |
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#define _IC_PROJECTIVE 0x00000000 |
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#define _RC_CHOP 0x00000300 |
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#define _RC_UP 0x00000200 |
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#define _RC_DOWN 0x00000100 |
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#define _RC_NEAR 0x00000000 |
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#define _PC_24 0x00020000 |
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#define _PC_53 0x00010000 |
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#define _PC_64 0x00000000 |
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|
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/* These are also defined in Mingw math.h, needed to work around |
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GCC build issues. */ |
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/* Return values for fpclass. */ |
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#ifndef __MINGW_FPCLASS_DEFINED |
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#define __MINGW_FPCLASS_DEFINED 1 |
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#define _FPCLASS_SNAN 0x0001 /* Signaling "Not a Number" */ |
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#define _FPCLASS_QNAN 0x0002 /* Quiet "Not a Number" */ |
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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 /* Negative Zero */ |
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#define _FPCLASS_PZ 0x0040 /* Positive Zero */ |
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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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#endif /* __MINGW_FPCLASS_DEFINED */ |
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|
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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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|
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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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|
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#ifndef __STRICT_ANSI__ |
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#define CW_DEFAULT _CW_DEFAULT |
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#define MCW_PC _MCW_PC |
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#define PC_24 _PC_24 |
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#define PC_53 _PC_53 |
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#define PC_64 _PC_64 |
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#endif /* Not __STRICT_ANSI__ */ |
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|
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#if defined(__i386__) |
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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(__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(__x86_64__) |
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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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|
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#ifndef RC_INVOKED |
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|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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/* Set the FPU control word as cw = (cw & ~unMask) | (unNew & unMask), |
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* i.e. change the bits in unMask to have the values they have in unNew, |
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* leaving other bits unchanged. */ |
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_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _controlfp (unsigned int _NewValue, unsigned int _Mask) __MINGW_ATTRIB_DEPRECATED_SEC_WARN; |
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_SECIMP errno_t __cdecl _controlfp_s(unsigned int *_CurrentState, unsigned int _NewValue, unsigned int _Mask); |
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_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _control87 (unsigned int _NewValue, unsigned int _Mask); |
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|
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|
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_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _clearfp (void); /* Clear the FPU status word */ |
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_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _statusfp (void); /* Report the FPU status word */ |
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#define _clear87 _clearfp |
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#define _status87 _statusfp |
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|
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|
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/* |
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MSVCRT.dll _fpreset initializes the control register to 0x27f, |
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the status register to zero and the tag word to 0FFFFh. |
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This differs from asm instruction finit/fninit which set control |
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word to 0x37f (64 bit mantissa precison rather than 53 bit). |
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By default, the mingw version of _fpreset sets fp control as |
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per fninit. To use the MSVCRT.dll _fpreset, include CRT_fp8.o when |
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building your application. |
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*/ |
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void __cdecl __MINGW_NOTHROW _fpreset (void); |
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#ifndef __STRICT_ANSI__ |
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void __cdecl __MINGW_NOTHROW fpreset (void); |
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#endif /* Not __STRICT_ANSI__ */ |
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|
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/* Global 'variable' for the current floating point error code. */ |
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_CRTIMP int * __cdecl __MINGW_NOTHROW __fpecode(void); |
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#define _fpecode (*(__fpecode())) |
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|
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/* |
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* IEEE recommended functions. MS puts them in float.h |
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* but they really belong in math.h. |
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*/ |
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|
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#ifndef _SIGN_DEFINED |
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#define _SIGN_DEFINED |
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_CRTIMP double __cdecl __MINGW_NOTHROW _chgsign (double _X); |
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_CRTIMP double __cdecl __MINGW_NOTHROW _copysign (double _Number,double _Sign); |
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_CRTIMP double __cdecl __MINGW_NOTHROW _logb (double); |
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_CRTIMP double __cdecl __MINGW_NOTHROW _nextafter (double, double); |
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_CRTIMP double __cdecl __MINGW_NOTHROW _scalb (double, long); |
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|
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_CRTIMP int __cdecl __MINGW_NOTHROW _finite (double); |
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_CRTIMP int __cdecl __MINGW_NOTHROW _fpclass (double); |
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_CRTIMP int __cdecl __MINGW_NOTHROW _isnan (double); |
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|
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#define _copysignl copysignl |
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extern long double __cdecl _chgsignl (long double); |
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#endif /* _SIGN_DEFINED */ |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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|
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#endif /* Not RC_INVOKED */ |
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|
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#endif /* _MINGW_FLOAT_H_ */ |
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|
