feupdateenv(3M)feupdateenv(3M)NAMEfeupdateenv() - update floating-point environment
HP Integrity Server Only
The function saves the currently raised floating-point exceptions in
its automatic storage, installs the floating-point environment repre‐
sented by the object pointed to by envp, and then raises the saved
floating-point exceptions. Use with to hide spurious floating-point
The argument envp must point to an object set by a call to or or equal
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 actions were
successfully carried out.
No errors are defined.
Store the current floating-point environment in hide spurious underflow
exceptions, and continue on any floating-point exceptions that occur
until the call to is encountered.
SEE ALSOfegetenv(3M), feholdexcept(3M), fesetenv(3M), fenv(5).
: ISO/IEC C99 (including Annex F, "IEC 60559 floating-point arith‐