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FERAISEEXCEPT(3P) POSIX Programmer's Manual FERAISEEXCEPT(3P)
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior), or
the interface may not be implemented on Linux.
feraiseexcept — raise floating-point exception
#include <fenv.h>
int feraiseexcept(int excepts);
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.
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.
No errors are defined.
The following sections are informative.
None.
The effect is intended to be similar to that of floating-point
exceptions raised by arithmetic operations. Hence, enabled traps for
floating-point exceptions raised by this function are taken.
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.
None.
feclearexcept(3p), fegetexceptflag(3p), fetestexcept(3p)
The Base Definitions volume of POSIX.1‐2008, fenv.h(0p)
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- 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 Standard 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)
Pages that refer to this page: fenv.h(0p), feclearexcept(3p), fegetexceptflag(3p), fetestexcept(3p)