C++ User's Guide

-fstore

x86: Forces precision of floating-point expressions.

This option causes the compiler to convert the value of a floating-point expression or function to the type on the left side of an assignment rather than leave the value in a register when the following is true:

To turn off this option, use the -nofstore option.

Warnings

Due to roundoffs and truncation, the results can be different from those that are generated from the register values.

See also

-nofstore