3.10 fetestexcept—test floating-point exception flags

Synopsis

#include <fenv.h>
int fetestexcept(int except);

Link with -lm.

Description
This method test the current floating-point exceptions to determine which of those specified in except are currently set.

Returns
This method returns the bitwise-inclusive OR of the floating point exception macros which correspond to the currently set floating point exceptions.

Portability
ANSI C requires fetestexcept.

Not all Newlib targets have a working implementation. Refer to the file sys/fenv.h to see the status for your target.