fastfunctions.h File Reference

This is a fast function library originally intended to speed up QMcBeaver a Quantum Monte Carlo program. More...

#include <math.h>

Go to the source code of this file.

Functions
double	fastPower (double x, int n)
	Fast power function for use when the exponent is a small integer.
double	pythag (double a, double b)
	A safe implementation of pythagoran's theorem.

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Detailed Description

This is a fast function library originally intended to speed up QMcBeaver a Quantum Monte Carlo program.

Definition in file fastfunctions.h.

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Function Documentation

double fastPower	(	double	x,
		int	n
	)

Fast power function for use when the exponent is a small integer.

Parameters:

	x	base
	n	exponent

Returns:

Definition at line 15 of file fastfunctions.cpp.

Referenced by QMCNuclearForces::calcCoefficients().

double pythag	(	double	a,
		double	b
	)

A safe implementation of pythagoran's theorem.

It shouldn't under or over flow.

Definition at line 42 of file fastfunctions.cpp.

Referenced by Array2D< QMCProperty >::eigenvaluesRS().