--- trunk/reactos/lib/crt/include/float.h 2005-02-18 13:07:27 UTC (rev 13630)
+++ trunk/reactos/lib/crt/include/float.h 2005-02-18 13:53:21 UTC (rev 13631)
@@ -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_ */
+