fedisableexcept()

Mask the specified floating-point exceptions

Synopsis:

#include <fenv.h>

int fedisableexcept( int excepts );

Arguments:

excepts
A bitwise OR of the flags corresponding the the exceptions that you want to mask; zero or more of the following:
  • FE_ALL_EXCEPT — all the bits
  • FE_DIVBYZERO — pole error
  • FE_INEXACT — inexact result; rounding was necessary
  • 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 fedisableexcept() function masks 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 masking 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