?lapy2

Syntax

float LAPACKE_slapy2 (floatx, floaty);

double LAPACKE_dlapy2 (doublex, doubley);

Include Files

• mkl.h

Description

The function ?lapy2 returns sqrt(x²+y²), avoiding unnecessary overflow or harmful underflow.

Input Parameters

A <datatype> placeholder, if present, is used for the C interface data types in the C interface section above. See C Interface Conventions for the C interface principal conventions and type definitions.

x, y

Specify the input values x and y.

Return Values

The function returns a value val.

If val=-1D0, the first argument was NaN.

If val=-2D0, the second argument was NaN.