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FERAISEEXCEPT(P)		    POSIX Programmer's Manual			 FERAISEEXCEPT(P)

NAME
       feraiseexcept - raise floating-point exception

SYNOPSIS
       #include <fenv.h>

       int feraiseexcept(int excepts);

DESCRIPTION
       The  feraiseexcept()  function  shall attempt to raise the supported floating-point excep-
       tions represented by the argument excepts. The order in which these floating-point  excep-
       tions  are raised is unspecified. Whether the feraiseexcept() function additionally raises
       the inexact floating-point exception whenever it raises the overflow or	underflow  float-
       ing-point exception is implementation-defined.

RETURN VALUE
       If  the	argument  is  zero  or	if all the specified exceptions were successfully raised,
       feraiseexcept() shall return zero.  Otherwise, it shall return a non-zero value.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The effect is intended to be similar to that of floating-point exceptions raised by arith-
       metic  operations. Hence, enabled traps for floating-point exceptions raised by this func-
       tion are taken.

RATIONALE
       Raising overflow or underflow is allowed to also raise inexact because on  some	architec-
       tures  the  only practical way to raise an exception is to execute an instruction that has
       the exception as a side effect. The function is not restricted to accept only valid  coin-
       cident  expressions for atomic operations, so the function can be used to raise exceptions
       accrued over several operations.

FUTURE DIRECTIONS
       None.

SEE ALSO
       feclearexcept() , fegetexceptflag() , fesetexceptflag() , fetestexcept() , the Base  Defi-
       nitions volume of IEEE Std 1003.1-2001, <fenv.h>

COPYRIGHT
       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable	Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				 FERAISEEXCEPT(P)
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