Does C++ have instructions to allow extended precision in floating point operations?

I understand that computers use 'floating point representation' to represent fractions and very large numbers. This form of storage is vulnerable to all kinds of round off and significant figure errors.

One solution is 'extended precision' where the size of the word storing the floating point representation is doubled. I've read math programs like MATLAB give the user the options to use extended precision.

Does C++ have a keyword or function that instructs the computer to use extended precisions?