Unmask the specified floating-point exceptions
Synopsis:
#include <fenv.h>
int feenableexcept( int excepts );
Arguments:
- excepts
- A bitwise OR of the flags corresponding the the exceptions that you want to unmask; zero or more of the following:
- FE_ALL_EXCEPT — all the bits
- FE_DENORMAL — the result of a floating-point expression is a denormalized number
- FE_DIVBYZERO — pole error
- FE_INEXACT — the result can't be exactly represented as a floating-point number
- FE_INVALID — domain error
- FE_OVERFLOW — result is too large to be representable
- FE_UNDERFLOW — result is subnormal with a loss of precision
Library:
libm
Use the -l m option to
qcc
to link against this library.
Description:
The feenableexcept() function unmasks the specified floating-point exceptions.
To unmask the exceptions, call
feenableexcept().
CAUTION:
This operation doesn't work on AArch64 targets.
There's a known hardware limitation that causes any unmasking of floating-point exceptions to be ignored.
Returns:
A bitmap of the exceptions that were masked before you called this function.
Classification:
BSD,
QNX Neutrino
| Safety: |
|
|---|
| Cancellation point |
No |
| Interrupt handler |
No |
| Signal handler |
No |
| Thread |
Yes |