*
* 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
+ * DISCLAIMED. This includes but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* $Revision$
#ifndef _FLOAT_H_
#define _FLOAT_H_
-#ifdef __cplusplus
-extern "C" {
-#endif
-#define FLT_ROUNDS 1
-#define FLT_GUARD 1
-#define FLT_NORMALIZE 1
+#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
+#define FLT_RADIX 2
/* Decimal digits of precision. */
-#define FLT_DIG 6
+#define FLT_DIG 6
/* Smallest number such that 1+x != 1 */
-#define FLT_EPSILON 1.19209290e-07F
+#define FLT_EPSILON 1.19209290e-07F
/* The number of base FLT_RADIX digits in the mantissa. */
-#define FLT_MANT_DIG 24
+#define FLT_MANT_DIG 24
/* The maximum floating point number. */
-#define FLT_MAX 3.40282347e+38F
+#define FLT_MAX 3.40282347e+38F
/* Maximum n such that FLT_RADIX^n - 1 is representable. */
-#define FLT_MAX_EXP 128
+#define FLT_MAX_EXP 128
/* Maximum n such that 10^n is representable. */
-#define FLT_MAX_10_EXP 38
+#define FLT_MAX_10_EXP 38
/* Minimum normalized floating-point number. */
-#define FLT_MIN 1.17549435e-38F
+#define FLT_MIN 1.17549435e-38F
/* Minimum n such that FLT_RADIX^n is a normalized number. */
-#define FLT_MIN_EXP (-125)
+#define FLT_MIN_EXP (-125)
/* Minimum n such that 10^n is a normalized number. */
-#define FLT_MIN_10_EXP (-37)
+#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)
+#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)
+#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__
+#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 */
+#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
+#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 */
+
+
+#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 _controlfp(unsigned int unNew, unsigned int unMask);
+unsigned int _control87(unsigned int unNew, unsigned int unMask);
-unsigned int _clearfp (void); /* Clear the FPU status word */
-unsigned int _statusfp (void); /* Report the FPU status word */
-#define _clear87 _clearfp
-#define _status87 _statusfp
+unsigned int _clearfp(void); /* Clear the FPU status word */
+unsigned int _statusfp(void); /* Report the FPU status word */
+#define _clear87 _clearfp
+#define _status87 _statusfp
-void _fpreset (void); /* Reset the FPU */
+
+/*
+ MSVCRT.dll _fpreset initializes the control register to 0x27f,
+ the status register to zero and the tag word to 0FFFFh.
+ This differs from asm instruction finit/fninit which set control
+ word to 0x37f (64 bit mantissa precison rather than 53 bit).
+ By default, the mingw version of _fpreset sets fp control as
+ per fninit. To use the MSVCRT.dll _fpreset, include CRT_fp8.o when
+ building your application.
+*/
+void _fpreset(void); /* Reset the FPU */
/* Global 'variable' for the current floating point error code. */
-extern int * __fpecode(void);
-#define _fpecode (*(__fpecode()))
+int* __fpecode(void);
+#define _fpecode (*(__fpecode()))
/*
- * IEEE recommended functions
+ * IEEE recommended functions. MS puts them in float.h
+ * but they really belong in math.h.
*/
-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);
+double _chgsign (double);
+double _copysign (double, double);
+double _logb (double);
+double _nextafter (double, double);
+double _scalb (double, long);
-/* 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 */
-
-int _finite (double x);
-int _fpclass (double x);
-int _isnan (double x);
-int _isinf (double x); // not exported
-
-int _isnanl (long double x); // not exported
-int _isinfl (long double x); // not exported
-
-#define isnan(x) _isnan(x)
-#define isinf(x) _isinf(x)
-
-#endif /* Not __STRICT_ANSI__ */
-
-#ifdef __cplusplus
+int _finite (double);
+int _fpclass (double);
+int _isnan (double);
+
+int _isinf (double); // not exported
+int _isnanl (long double); // not exported
+int _isinfl (long double); // not exported
+
+#define isnan(x) _isnan(x)
+#define isinf(x) _isinf(x)
+
+
+#ifdef __cplusplus
}
#endif
+#endif /* Not __STRICT_ANSI__ */
+
#endif /* _FLOAT_H_ */
+
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