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+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* This file should never be included directly.  */
+
+#ifndef _FENVBITS_H
+#define _FENVBITS_H	1
+
+/* Define bits representing the exception.  We use the bit positions of
+   the appropriate bits in the FPSCR...  */
+enum
+  {
+    FE_INEXACT = 1 << 31-6,
+#define FE_INEXACT	FE_INEXACT
+    FE_DIVBYZERO = 1 << 31-5,
+#define FE_DIVBYZERO	FE_DIVBYZERO
+    FE_UNDERFLOW = 1 << 31-4,
+#define FE_UNDERFLOW	FE_UNDERFLOW
+    FE_OVERFLOW = 1 << 31-3,
+#define FE_OVERFLOW	FE_OVERFLOW
+
+    /* ... except for FE_INVALID, for which we use bit 31. FE_INVALID
+       actually corresponds to bits 7 through 12 and 21 through 23
+       in the FPSCR, but we can't use that because the current draft
+       says that it must be a power of 2.  Instead we use bit 24 which
+       is the enable bit for all the FE_INVALID exceptions.  */
+    FE_INVALID = 1 << 31-24,
+#define FE_INVALID	FE_INVALID
+
+#ifdef __USE_GNU
+    /* Breakdown of the FE_INVALID bits. Setting FE_INVALID on an
+       input to a routine is equivalent to setting all of these bits;
+       FE_INVALID will be set on output from a routine iff one of
+       these bits is set.  Note, though, that you can't disable or
+       enable these exceptions individually.  */
+
+    /* Operation with SNaN. */
+    FE_INVALID_SNAN = 1 << 31-7,
+#define FE_INVALID_SNAN	FE_INVALID_SNAN
+
+    /* Inf - Inf */
+    FE_INVALID_ISI = 1 << 31-8,
+#define FE_INVALID_ISI	FE_INVALID_ISI
+
+    /* Inf / Inf */
+    FE_INVALID_IDI = 1 << 31-9,
+#define FE_INVALID_IDI	FE_INVALID_IDI
+
+    /* 0 / 0 */
+    FE_INVALID_ZDZ = 1 << 31-10,
+#define FE_INVALID_ZDZ	FE_INVALID_ZDZ
+
+    /* Inf * 0 */
+    FE_INVALID_IMZ = 1 << 31-11,
+#define FE_INVALID_IMZ	FE_INVALID_IMZ
+
+    /* Comparison with NaN or SNaN. */
+    FE_INVALID_COMPARE = 1 << 31-12,
+#define FE_INVALID_COMPARE	FE_INVALID_COMPARE
+
+    /* Invalid operation flag for software (not set by hardware). */
+    FE_INVALID_SOFTWARE = 1 << 31-21,
+#define FE_INVALID_SOFTWARE	FE_INVALID_SOFTWARE
+
+    /* Square root of negative number (including -Inf). */
+    FE_INVALID_SQRT = 1 << 31-22,
+#define FE_INVALID_SQRT	FE_INVALID_SQRT
+
+    /* Conversion-to-integer of a NaN or a number too large or too small. */
+    FE_INVALID_INTEGER_CONVERSION = 1 << 31-23,
+#define FE_INVALID_INTEGER_CONVERSION	FE_INVALID_INTEGER_CONVERSION
+
+#define __FE_ALL_INVALID \
+        (FE_INVALID_SNAN | FE_INVALID_ISI | FE_INVALID_IDI | FE_INVALID_ZDZ \
+	 | FE_INVALID_IMZ | FE_INVALID_COMPARE | FE_INVALID_SOFTWARE \
+	 | FE_INVALID_SQRT | FE_INVALID_INTEGER_CONVERSION)
+#endif
+  };
+
+#define FE_ALL_EXCEPT \
+	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+/* PowerPC chips support all of the four defined rounding modes.  We
+   use the bit pattern in the FPSCR as the values for the
+   appropriate macros.  */
+enum
+  {
+    FE_TONEAREST = 0,
+#define FE_TONEAREST	FE_TONEAREST
+    FE_TOWARDSZERO = 1,
+#define FE_TOWARDSZERO	FE_TOWARDSZERO
+    FE_UPWARD = 2,
+#define FE_UPWARD	FE_UPWARD
+    FE_DOWNWARD = 3,
+#define FE_DOWNWARD	FE_DOWNWARD
+  };
+
+/* Type representing exception flags.  */
+typedef unsigned int fexcept_t;
+
+/* Type representing floating-point environment.  We leave it as 'double'
+   for efficiency reasons (rather than writing it to a 32-bit integer). */
+typedef double fenv_t;
+
+/* If the default argument is used we use this value.  */
+extern const fenv_t __fe_dfl_env;
+#define FE_DFL_ENV	(&__fe_dfl_env);
+
+#ifdef __USE_GNU
+/* Floating-point environment where none of the exceptions are masked.  */
+extern const fenv_t __fe_nomask_env;
+# define FE_NOMASK_ENV	(&__fe_nomask_env);
+#endif
+
+#endif /* fenvbits.h */