Question

I am confused over “getting and clearing” when working in Microsoft C. Like when or how you get the current status of word settings, and what function to use?

Answer 1

Research the following; Match Functions, Floating-point-math-package. and exception handling. This will greatly help you understand the “get and clear functions.

Here is an example of the Getting and Clearing function:

To get the current status word setting, use the _status87() function as follows:

unsigned sw_setting;
sw_setting = _status87():

To clear (0x0000) the status word setting before a suspicious floating point operation is performed, use the _clear87() function as follows:

unsigned sw-setting;
old_sw_setting = _clear87();

The status word is also cleared (0x0000) whenever the function _fpreset() is called to initialize the floating point math package.