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+/* Copyright (C) 2004-2014 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 Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+/* Define bits representing exceptions in the FPSR status word. */
+enum
+ {
+ FE_INVALID =
+#define FE_INVALID 1
+ FE_INVALID,
+ FE_DIVBYZERO =
+#define FE_DIVBYZERO 2
+ FE_DIVBYZERO,
+ FE_OVERFLOW =
+#define FE_OVERFLOW 4
+ FE_OVERFLOW,
+ FE_UNDERFLOW =
+#define FE_UNDERFLOW 8
+ FE_UNDERFLOW,
+ FE_INEXACT =
+#define FE_INEXACT 16
+ FE_INEXACT,
+ };
+
+/* Amount to shift by to convert an exception bit in FPSR to a an
+ exception bit mask in FPCR. */
+#define FE_EXCEPT_SHIFT 8
+
+/* All supported exceptions. */
+#define FE_ALL_EXCEPT \
+ (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
+
+/* Define bits representing rounding modes in the FPCR Rmode field. */
+#define FE_TONEAREST 0x000000
+#define FE_UPWARD 0x400000
+#define FE_DOWNWARD 0x800000
+#define FE_TOWARDZERO 0xc00000
+
+/* Type representing exception flags. */
+typedef unsigned int fexcept_t;
+
+/* Type representing floating-point environment. */
+typedef struct
+ {
+ unsigned int __fpcr;
+ unsigned int __fpsr;
+ }
+fenv_t;
+
+/* If the default argument is used we use this value. */
+#define FE_DFL_ENV ((const fenv_t *) -1l)
+
+#ifdef __USE_GNU
+/* Floating-point environment where none of the exceptions are masked. */
+# define FE_NOMASK_ENV ((const fenv_t *) -2)
+#endif