Template:ddcl list begin <tr class="t-dsc-header"><td>
<td></td> <td></td> </tr> <tr class="t-dcl "><td >
<td class="t-dcl-nopad"> </td> <td > (since C++11) </td> </tr> Template:ddcl list end
First, saves the current floating-point environment to the object pointed to by
envp (similar to std::fegetenv), then clears all floating-point status flags, and then installs the non-stop mode: future floating-point exceptions will not interrupt execution (will not trap), until the floating-point environment is restored by std::feupdateenv or std::fesetenv.
This function may be used in the beginning of a subroutine that must hide the floating-point exceptions it may raise from the caller. If only some exceptions must be suppressed, while others must be reported, the non-stop mode is usually ended with a call to std::feupdateenv after clearing the unwanted exceptions.
|envp||-||pointer to the object of type std::fenv_t where the floating-point environment will be stored|
0 on success, non-zero otherwise.