feraiseexcept(3M)feraiseexcept(3M)NAMEferaiseexcept() - raise floating-point exceptions
HP Integrity Server Only
The function raises the floating-point exceptions represented by its
argument. The argument can be constructed as a bitwise OR of the
exception macros: and represents all the exceptions.
Any traps enabled for the specified exceptions will be taken.
To use this function, compile either with the default option or with
the and options. Make sure your program includes
For Integrity servers, specify on the compiler command line or place
the call to this function under the effect of an affirmative pragma:
If the pragma is placed outside of any top-level declarations in a
file, the pragma will apply to all declarations in the compilation fol‐
lowing the pragma until another pragma is encountered or until the end
of the file is reached.
If the pragma is placed at the beginning of a block (compound state‐
ment), the pragma will apply until another pragma is encountered or
until the end of the block is reached.
For PA-RISC, you might need to use the compiler option in order to pre‐
vent optimizations that can undermine the specified behavior of this
Link in the math library by specifying on the compiler or linker com‐
For more information, see the at the following site:
Integrity Server Only
This function always returns 0, indicating that all the specified
exceptions were successfully raised.
No errors are defined.
Raise the underflow and inexact exceptions:
Raise all exceptions:
SEE ALSOfeclearexcept(3M), fegetexceptflag(3M), fegettrapenable(3M), fesetex‐
ceptflag(3M), fesettrapenable(3M), fetestexcept(3M), fenv(5).
: ISO/IEC C99 (including Annex F, "IEC 60559 floating-point arith‐