prec-sqrt, Qprec-sqrt

Improves precision of square root implementations.

Syntax

Linux and OS X:

-prec-sqrt

-no-prec-sqrt

Windows:

/Qprec-sqrt

/Qprec-sqrt-

Arguments

None

Default

-no-prec-sqrt
or /Qprec-sqrt-

The compiler uses a faster but less precise implementation of square root.

However, the default is -prec-sqrt or /Qprec-sqrt if any of the following options are specified: /Od, /fltconsistency, or /Qprec on Windows* systems; -O0 , -fltconsistency, or -mp1 on Linux* and OS X* systems.

Description

This option improves precision of square root implementations. It has a slight impact on speed.

This option inhibits any optimizations that can adversely affect the precision of a square root computation. The result is fully precise square root implementations, with some loss of performance.

IDE Equivalent

None

Alternate Options

None