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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 exceptions represented  by  the  argument	 excepts.  The
       order  in  which these floating-point exceptions are raised is unspeci‐
       fied. Whether the  feraiseexcept()  function  additionally  raises  the
       inexact	floating-point	exception  whenever  it raises the overflow or
       underflow floating-point exception is implementation-defined.

RETURN VALUE
       If the argument is zero or if all the specified	exceptions  were  suc‐
       cessfully  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	excep‐
       tions  raised by arithmetic operations. Hence, enabled traps for float‐
       ing-point exceptions raised by this function are taken.

RATIONALE
       Raising overflow or underflow is allowed to also raise inexact  because
       on  some	 architectures 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 coincident 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() , fetestex‐
       cept() , the Base Definitions 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 original Standard can be obtained online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group		     2003		      FERAISEEXCEPT(P)
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