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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/feclearexcept.3,v 1.3 2005/01/14 09:12:05 ru Exp $
-.\"
-.Dd May 8, 2004
-.Dt FECLEAREXCEPT 3
-.Os
-.Sh NAME
-.Nm feclearexcept ,
-.Nm fegetexceptflag ,
-.Nm feraiseexcept ,
-.Nm fesetexceptflag ,
-.Nm fetestexcept
-.Nd floating-point exception flag manipulation
-.Sh LIBRARY
-.Lb libm
-.Sh SYNOPSIS
-.In fenv.h
-.Fd "#pragma STDC FENV_ACCESS ON"
-.Ft int
-.Fn feclearexcept "int excepts"
-.Ft int
-.Fn fegetexceptflag "fexcept_t *flagp" "int excepts"
-.Ft int
-.Fn feraiseexcept "int excepts"
-.Ft int
-.Fn fesetexceptflag "const fexcept_t *flagp" "int excepts"
-.Ft int
-.Fn fetestexcept "int excepts"
-.Sh DESCRIPTION
-The
-.Fn feclearexcept
-routine clears the floating-point exception flags specified by
-.Fa excepts ,
-whereas
-.Fn feraiseexcept
-raises the specified exceptions.
-Raising an exception causes the corresponding flag to be set,
-and a
-.Dv SIGFPE
-is delivered to the process if the exception is unmasked.
-.Pp
-The
-.Fn fetestexcept
-function determines which flags are currently set, of those specified by
-.Fa excepts .
-.Pp
-The
-.Fn fegetexceptflag
-function stores the state of the exception flags specified in
-.Fa excepts
-in the opaque object pointed to by
-.Fa flagp .
-Similarly,
-.Fn fesetexceptflag
-changes the specified exception flags to reflect the state stored in
-the object pointed to by
-.Fa flagp .
-Note that the flags restored with
-.Fn fesetexceptflag
-must be a (not necessarily proper) subset of the flags recorded by
-a prior call to
-.Fn fegetexceptflag .
-.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 IMPLEMENTATION NOTES
-On some architectures, raising an overflow or underflow exception
-also causes an inexact exception to be raised.
-In these cases, the overflow or underflow will be raised first.
-.Pp
-The
-.Fn fegetexceptflag
-and
-.Fn fesetexceptflag
-routines are preferred to
-.Fn fetestexcept
-and
-.Fn feraiseexcept ,
-respectively, for saving and restoring exception flags.
-The latter do not re-raise exceptions and may preserve
-architecture-specific information such as addresses where
-exceptions occurred.
-.Sh RETURN VALUES
-The
-.Fn feclearexcept ,
-.Fn fegetexceptflag ,
-.Fn feraiseexcept ,
-and
-.Fn fesetexceptflag
-functions return 0 upon success, and non-zero otherwise.
-The
-.Fn fetestexcept
-function returns the bitwise OR of the values of the current exception
-flags that were requested.
-.Sh SEE ALSO
-.Xr sigaction 2 ,
-.Xr feholdexcept 3 ,
-.Xr fenv 3 ,
-.Xr feupdateenv 3 ,
-.Xr fpgetsticky 3 ,
-.Xr fpresetsticky 3
-.Sh STANDARDS
-The
-.Fn feclearexcept ,
-.Fn fegetexceptflag ,
-.Fn feraiseexcept ,
-.Fn fesetexceptflag ,
-and
-.Fn fetestexcept
-routines conform to
-.St -isoC-99 .
-.Sh HISTORY
-These functions first appeared in
-.Fx 5.3 .