mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 08:08:38 +00:00
153 lines
5 KiB
C
153 lines
5 KiB
C
/*
|
|
* float.h
|
|
* This file has no copyright assigned and is placed in the Public Domain.
|
|
* This file is a part of the mingw-runtime package.
|
|
* No warranty is given; refer to the file DISCLAIMER within the package.
|
|
*
|
|
* 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, but it doesn't include the non-standard
|
|
* stuff for accessing the fp controller. We include_next the
|
|
* GCC-supplied header and just define the MS-specific extensions
|
|
* here.
|
|
*
|
|
*/
|
|
|
|
#include_next<float.h>
|
|
|
|
#ifndef _MINGW_FLOAT_H_
|
|
#define _MINGW_FLOAT_H_
|
|
|
|
/* All the headers include this file. */
|
|
#include <_mingw.h>
|
|
|
|
/*
|
|
* 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
|
|
|
|
/* These are also defined in Mingw math.h, needed to work around
|
|
GCC build issues. */
|
|
/* Return values for fpclass. */
|
|
#ifndef __MINGW_FPCLASS_DEFINED
|
|
#define __MINGW_FPCLASS_DEFINED 1
|
|
#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 */
|
|
#endif /* __MINGW_FPCLASS_DEFINED */
|
|
|
|
/* invalid subconditions (_SW_INVALID also set) */
|
|
#define _SW_UNEMULATED 0x0040 /* unemulated instruction */
|
|
#define _SW_SQRTNEG 0x0080 /* square root of a neg number */
|
|
#define _SW_STACKOVERFLOW 0x0200 /* FP stack overflow */
|
|
#define _SW_STACKUNDERFLOW 0x0400 /* FP stack underflow */
|
|
|
|
/* Floating point error signals and return codes */
|
|
#define _FPE_INVALID 0x81
|
|
#define _FPE_DENORMAL 0x82
|
|
#define _FPE_ZERODIVIDE 0x83
|
|
#define _FPE_OVERFLOW 0x84
|
|
#define _FPE_UNDERFLOW 0x85
|
|
#define _FPE_INEXACT 0x86
|
|
#define _FPE_UNEMULATED 0x87
|
|
#define _FPE_SQRTNEG 0x88
|
|
#define _FPE_STACKOVERFLOW 0x8a
|
|
#define _FPE_STACKUNDERFLOW 0x8b
|
|
#define _FPE_EXPLICITGEN 0x8c /* raise( SIGFPE ); */
|
|
|
|
#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. */
|
|
_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _controlfp (unsigned int unNew, unsigned int unMask);
|
|
_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _control87 (unsigned int unNew, unsigned int unMask);
|
|
|
|
|
|
_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _clearfp (void); /* Clear the FPU status word */
|
|
_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _statusfp (void); /* Report the FPU status word */
|
|
#define _clear87 _clearfp
|
|
#define _status87 _statusfp
|
|
|
|
|
|
/*
|
|
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 __cdecl __MINGW_NOTHROW _fpreset (void);
|
|
void __cdecl __MINGW_NOTHROW fpreset (void);
|
|
|
|
/* Global 'variable' for the current floating point error code. */
|
|
_CRTIMP int * __cdecl __MINGW_NOTHROW __fpecode(void);
|
|
#define _fpecode (*(__fpecode()))
|
|
|
|
/*
|
|
* IEEE recommended functions. MS puts them in float.h
|
|
* but they really belong in math.h.
|
|
*/
|
|
|
|
_CRTIMP double __cdecl __MINGW_NOTHROW _chgsign (double);
|
|
_CRTIMP double __cdecl __MINGW_NOTHROW _copysign (double, double);
|
|
_CRTIMP double __cdecl __MINGW_NOTHROW _logb (double);
|
|
_CRTIMP double __cdecl __MINGW_NOTHROW _nextafter (double, double);
|
|
_CRTIMP double __cdecl __MINGW_NOTHROW _scalb (double, long);
|
|
|
|
_CRTIMP int __cdecl __MINGW_NOTHROW _finite (double);
|
|
_CRTIMP int __cdecl __MINGW_NOTHROW _fpclass (double);
|
|
_CRTIMP int __cdecl __MINGW_NOTHROW _isnan (double);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* Not RC_INVOKED */
|
|
|
|
#endif /* Not __STRICT_ANSI__ */
|
|
|
|
#endif /* _FLOAT_H_ */
|
|
|
|
|