/mnt/hgfs/VMWare/cudpp/src/cudpp/cudpp_util.h File Reference

C++ utility functions and classes used internally to cuDPP. More...

#include <cuda.h>
#include <cudpp.h>
#include <limits.h>
#include <float.h>

Classes
struct	typeToVector< T, N >
	Utility template struct for generating small vector types from scalar types. More...
Functions
bool	isPowerOfTwo (int n)
	Determine if n is a power of two.
bool	isMultiple (int n, int f)
	Determine if an integer n is a multiple of an integer f.
unsigned int	ceilPow2 (unsigned int x)
	Compute the smallest power of two larger than x.
unsigned int	floorPow2 (unsigned int x)
	Compute the largest power of two smaller than or equal to x.
unsigned int	logBase2Pow2 (unsigned int x)
	Compute the base 2 logarithm of a power-of-2 integerx. Taken from: http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog.
template<class T >
__host__ __device__ T	getMax ()
	Returns the maximum value for type T.
template<class T >
__host__ __device__ T	getMin ()
	Returns the minimum value for type T.
template<class T >
int	max3 (T a, T b, T c)
	Returns the maximum of three values.

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Detailed Description

C++ utility functions and classes used internally to cuDPP.

cudpp_util.h

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Function Documentation

bool isPowerOfTwo

(

int

n

)

[inline]

Determine if n is a power of two.

Parameters:

n	Value to be checked to see if it is a power of two

Returns:

True if n is a power of two, false otherwise

bool isMultiple	(	int	n,
		int	f
	)		[inline]

Determine if an integer n is a multiple of an integer f.

Parameters:

n	Multiple
f	Factor

Returns:

True if n is a multiple of f, false otherwise

unsigned int ceilPow2

(

unsigned int

x

)

[inline]

Compute the smallest power of two larger than x.

Parameters:

x	Input value

Returns:

The smallest power f two larger than x

unsigned int floorPow2

(

unsigned int

x

)

[inline]

Compute the largest power of two smaller than or equal to x.

Parameters:

x	Input value

Returns:

The largest power of two smaller than or equal to x.

unsigned int logBase2Pow2

(

unsigned int

x

)

[inline]

Compute the base 2 logarithm of a power-of-2 integerx. Taken from: http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog.

Parameters:

x	Input value

Returns:

The log base 2 of x.

template<class T >

__host__ __device__ T getMax

(

)

[inline]

Returns the maximum value for type T.

Returns:

Maximum value for type T.

Implemented using template specialization on T.

template<class T >

__host__ __device__ T getMin

(

)

[inline]

Returns the minimum value for type T.

Returns:

Minimum value for type T.

Implemented using template specialization on T.

template<class T >

int max3	(	T	a,
		T	b,
		T	c
	)		[inline]

Returns the maximum of three values.

Parameters:

a	First value.
b	Second value.
c	Third value.

Returns:

The maximum of a, b and c.