posix man page for feraiseexcept

FERAISEEXCEPT(3P)					     POSIX Programmer's Manual						 FERAISEEXCEPT(3P)

PROLOG
       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
       feraiseexcept -- raise floating-point exception

SYNOPSIS
       #include <fenv.h>

       int feraiseexcept(int excepts);

DESCRIPTION
       The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here
       and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard.

       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 unspecified. 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 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 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(), fetestexcept()

       The Base Definitions volume of POSIX.1-2008, <fenv.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C)  2013  by	the  Institute	of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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 Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE
/The Open Group						       2013							 FERAISEEXCEPT(3P)