/*
 * Floating point arithmetic.
 *
 * Derived from the mingw header written by Colin Peters.
 * Modified for Wine use by Hans Leidekker.
 * This file is in the public domain.
 */

#ifndef __WINE_FLOAT_H
#define __WINE_FLOAT_H
#ifndef __WINE_USE_MSVCRT
#define __WINE_USE_MSVCRT
#endif

#ifndef MSVCRT
# ifdef USE_MSVCRT_PREFIX
#  define MSVCRT(x)    MSVCRT_##x
# else
#  define MSVCRT(x)    x
# endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

/* _controlfp masks and bitflags - x86 only so far */
#ifdef __i386__

/* 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
#endif

/* _statusfp bit flags */
#define _SW_INEXACT    0x00000001 /* inexact (precision) */
#define _SW_UNDERFLOW  0x00000002 /* underflow */
#define _SW_OVERFLOW   0x00000004 /* overflow */
#define _SW_ZERODIVIDE 0x00000008 /* zero divide */
#define _SW_INVALID    0x00000010 /* invalid */

#define _SW_UNEMULATED     0x00000040  /* unemulated instruction */
#define _SW_SQRTNEG        0x00000080  /* square root of a neg number */
#define _SW_STACKOVERFLOW  0x00000200  /* FP stack overflow */
#define _SW_STACKUNDERFLOW 0x00000400  /* FP stack underflow */

#define _SW_DENORMAL 0x00080000 /* denormal status bit */

/* fpclass constants */
#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 */

double _copysign (double, double);
double _chgsign (double);
double _scalb(double, long);
double _logb(double);
double _nextafter(double, double);
int    _finite(double);
int    _isnan(double);
int    _fpclass(double);

#ifdef __cplusplus
}
#endif

#endif /* __WINE_FLOAT_H */