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- /*
- * float.h
- *
- * Constants related to floating point arithmetic.
- *
- * Also included here are some non-ANSI bits for accessing the floating
- * point controller.
- *
- * NOTE: GCC provides float.h, and it is probably more accurate than this,
- * but it doesn't include the non-standard stuff for accessing the
- * fp controller. (TODO: Move those bits elsewhere?) Thus it is
- * probably not a good idea to use the GCC supplied version instead
- * of this header.
- *
- * This file is part of the Mingw32 package.
- *
- * Contributors:
- * Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
- *
- * THIS SOFTWARE IS NOT COPYRIGHTED
- *
- * This source code is offered for use in the public domain. You may
- * use, modify or distribute it freely.
- *
- * This code is distributed in the hope that it will be useful but
- * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
- * DISCLAMED. This includes but is not limited to warranties of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * $Revision: 1.1.1.3 $
- * $Author: khan $
- * $Date: 1998/02/04 20:03:06 $
- *
- */
-
- #ifndef _FLOAT_H_
- #define _FLOAT_H_
-
- /* All the headers include this file. */
- #include <_mingw.h>
-
- #define FLT_ROUNDS 1
- #define FLT_GUARD 1
- #define FLT_NORMALIZE 1
-
- /*
- * The characteristics of float.
- */
-
- /* The radix for floating point representation. */
- #define FLT_RADIX 2
-
- /* Decimal digits of precision. */
- #define FLT_DIG 6
-
- /* Smallest number such that 1+x != 1 */
- #define FLT_EPSILON 1.19209290e-07F
-
- /* The number of base FLT_RADIX digits in the mantissa. */
- #define FLT_MANT_DIG 24
-
- /* The maximum floating point number. */
- #define FLT_MAX 3.40282347e+38F
-
- /* Maximum n such that FLT_RADIX^n - 1 is representable. */
- #define FLT_MAX_EXP 128
-
- /* Maximum n such that 10^n is representable. */
- #define FLT_MAX_10_EXP 38
-
- /* Minimum normalized floating-point number. */
- #define FLT_MIN 1.17549435e-38F
-
- /* Minimum n such that FLT_RADIX^n is a normalized number. */
- #define FLT_MIN_EXP (-125)
-
- /* Minimum n such that 10^n is a normalized number. */
- #define FLT_MIN_10_EXP (-37)
-
-
- /*
- * The characteristics of double.
- */
- #define DBL_DIG 15
- #define DBL_EPSILON 1.1102230246251568e-16
- #define DBL_MANT_DIG 53
- #define DBL_MAX 1.7976931348623157e+308
- #define DBL_MAX_EXP 1024
- #define DBL_MAX_10_EXP 308
- #define DBL_MIN 2.2250738585072014e-308
- #define DBL_MIN_EXP (-1021)
- #define DBL_MIN_10_EXP (-307)
-
-
- /*
- * The characteristics of long double.
- * NOTE: long double is the same as double.
- */
- #define LDBL_DIG 15
- #define LDBL_EPSILON 1.1102230246251568e-16L
- #define LDBL_MANT_DIG 53
- #define LDBL_MAX 1.7976931348623157e+308L
- #define LDBL_MAX_EXP 1024
- #define LDBL_MAX_10_EXP 308
- #define LDBL_MIN 2.2250738585072014e-308L
- #define LDBL_MIN_EXP (-1021)
- #define LDBL_MIN_10_EXP (-307)
-
-
- /*
- * Functions and definitions for controlling the FPU.
- */
- #ifndef __STRICT_ANSI__
-
- /* TODO: These constants are only valid for x86 machines */
-
- /* Control word masks for unMask */
- #define _MCW_EM 0x0008001F /* Error masks */
- #define _MCW_IC 0x00040000 /* Infinity */
- #define _MCW_RC 0x00000300 /* Rounding */
- #define _MCW_PC 0x00030000 /* Precision */
-
- /* Control word values for unNew (use with related unMask above) */
- #define _EM_INVALID 0x00000010
- #define _EM_DENORMAL 0x00080000
- #define _EM_ZERODIVIDE 0x00000008
- #define _EM_OVERFLOW 0x00000004
- #define _EM_UNDERFLOW 0x00000002
- #define _EM_INEXACT 0x00000001
- #define _IC_AFFINE 0x00040000
- #define _IC_PROJECTIVE 0x00000000
- #define _RC_CHOP 0x00000300
- #define _RC_UP 0x00000200
- #define _RC_DOWN 0x00000100
- #define _RC_NEAR 0x00000000
- #define _PC_24 0x00020000
- #define _PC_53 0x00010000
- #define _PC_64 0x00000000
-
- /* Return values for fpclass. */
- #define _FPCLASS_SNAN 0x0001 /* Signaling "Not a Number" */
- #define _FPCLASS_QNAN 0x0002 /* Quiet "Not a Number" */
- #define _FPCLASS_NINF 0x0004 /* Negative Infinity */
- #define _FPCLASS_NN 0x0008 /* Negative Normal */
- #define _FPCLASS_ND 0x0010 /* Negative Denormal */
- #define _FPCLASS_NZ 0x0020 /* Negative Zero */
- #define _FPCLASS_PZ 0x0040 /* Positive Zero */
- #define _FPCLASS_PD 0x0080 /* Positive Denormal */
- #define _FPCLASS_PN 0x0100 /* Positive Normal */
- #define _FPCLASS_PINF 0x0200 /* Positive Infinity */
-
- #ifndef RC_INVOKED
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /* Set the FPU control word as cw = (cw & ~unMask) | (unNew & unMask),
- * i.e. change the bits in unMask to have the values they have in unNew,
- * leaving other bits unchanged. */
- unsigned int _controlfp (unsigned int unNew, unsigned int unMask);
- unsigned int _control87 (unsigned int unNew, unsigned int unMask);
-
-
- unsigned int _clearfp (); /* Clear the FPU status word */
- unsigned int _statusfp (); /* Report the FPU status word */
- #define _clear87 _clearfp
- #define _status87 _statusfp
-
- void _fpreset (); /* Reset the FPU */
-
- /* Global 'variable' for the current floating point error code. */
- int * __fpecode();
- #define _fpecode (*(__fpecode()))
-
- /*
- * IEEE recommended functions
- */
-
- double _chgsign (double x);
- double _copysign (double dTo, double dFrom);
- double _logb (double x);
- double _nextafter (double x, double y);
- double _scalb (double x, long n);
-
- int _finite (double x);
- int _fpclass (double x);
- int _isnan (double x);
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* Not RC_INVOKED */
-
- #endif /* Not __STRICT_ANSI__ */
-
- #endif /* _FLOAT_H_ */
-
-