workaround for buggy mingw include search order on linux (gvg)

svn path=/trunk/; revision=13631

reactos/lib/crt/include/float.h

@@ -0,0 +1,152 @@
+/* 
+ * 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 _controlfp (unsigned int unNew, unsigned int unMask);
+_CRTIMP unsigned int __cdecl _control87 (unsigned int unNew, unsigned int unMask);
+
+
+_CRTIMP unsigned int __cdecl _clearfp (void);	/* Clear the FPU status word */
+_CRTIMP unsigned int __cdecl _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 _fpreset (void);
+void __cdecl fpreset (void);
+
+/* Global 'variable' for the current floating point error code. */
+_CRTIMP int * __cdecl __fpecode(void);
+#define	_fpecode	(*(__fpecode()))
+
+/*
+ * IEEE recommended functions.  MS puts them in float.h
+ * but they really belong in math.h.
+ */
+
+_CRTIMP double __cdecl _chgsign	(double);
+_CRTIMP double __cdecl _copysign (double, double);
+_CRTIMP double __cdecl _logb (double);
+_CRTIMP double __cdecl _nextafter (double, double);
+_CRTIMP double __cdecl _scalb (double, long);
+
+_CRTIMP int __cdecl _finite (double);
+_CRTIMP int __cdecl _fpclass (double);
+_CRTIMP int __cdecl _isnan (double);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* Not RC_INVOKED */
+
+#endif	/* Not __STRICT_ANSI__ */
+
+#endif /* _FLOAT_H_ */
+