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-.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" $FreeBSD: src/lib/msun/man/feenableexcept.3,v 1.1 2005/03/16 19:04:28 das Exp $
-.\"
-.Dd March 16, 2005
-.Dt FEENABLEEXCEPT 3
-.Os
-.Sh NAME
-.Nm feenableexcept ,
-.Nm fedisableexcept ,
-.Nm fegetexcept
-.Nd floating-point exception masking
-.Sh LIBRARY
-.Lb libm
-.Sh SYNOPSIS
-.In fenv.h
-.Fd "#pragma STDC FENV_ACCESS ON"
-.Ft int
-.Fn feenableexcept "int excepts"
-.Ft int
-.Fn fedisableexcept "int excepts"
-.Ft int
-.Fn fegetexcept "void"
-.Sh DESCRIPTION
-The
-.Fn feenableexcept
-and
-.Fn fedisableexcept
-functions
-unmask and mask (respectively) exceptions specified in
-.Fa excepts .
-The
-.Fn fegetexcept
-function
-returns the current exception mask.
-All exceptions are masked by default.
-.Pp
-Floating-point operations that produce unmasked exceptions will trap, and a
-.Dv SIGFPE
-will be delivered to the process.
-By installing a signal handler for
-.Dv SIGFPE ,
-applications can take appropriate action immediately without
-testing the exception flags after every operation.
-Note that the trap may not be immediate, but it should occur
-before the next floating-point instruction is executed.
-.Pp
-For all of these functions, the possible types of exceptions
-include those described in
-.Xr fenv 3 .
-Some architectures may define other types of floating-point exceptions.
-.Sh RETURN VALUES
-The
-.Fn feenableexcept ,
-.Fn fedisableexcept ,
-and
-.Fn fegetexcept
-functions return a bitmap of the exceptions that were unmasked
-prior to the call.
-.Sh SEE ALSO
-.Xr sigaction 2 ,
-.Xr feclearexcept 3 ,
-.Xr feholdexcept 3 ,
-.Xr fenv 3 ,
-.Xr feupdateenv 3
-.Sh BUGS
-Functions in the standard library may trigger exceptions multiple
-times as a result of intermediate computations;
-however, they generally do not trigger spurious exceptions.
-.Pp
-No interface is provided to permit exceptions to be handled in
-nontrivial ways.
-There is no uniform way for an exception handler to access
-information about the exception-causing instruction, or
-to determine whether that instruction should be reexecuted
-after returning from the handler.