powersOfTwo.h File Reference

inline functions for fast math involving powers of two More...

#include <climits>

Go to the source code of this file.

Namespaces
	mpblocks
	mpblocks::cuda

Functions
template<typename T >
T	mpblocks::cuda::divideBy2 (const T &x)
	returns x/2 (using bit shift), if x is odd then the result is floor(x/2) More...
template<typename T >
T	mpblocks::cuda::dividePow2 (T x, T y)
	returns x/y if x and y are both powers of two, otherwise the result is undefined More...
template<unsigned int I, typename T >
T	mpblocks::cuda::getBit (T x)
	returns the value of the specified bit More...
template<typename T >
T	mpblocks::cuda::intDivideRoundUp (T x, T y)
	integer divide with round up More...
template<typename T >
T	mpblocks::cuda::intPow (T x, T p)
	returns x to the power of p More...
template<typename T >
T	mpblocks::cuda::isEven (T x)
	returns true if the number is even More...
template<typename T >
T	mpblocks::cuda::isOdd (T x)
	returns true if the number is odd More...
template<typename T >
bool	mpblocks::cuda::isPow2 (T x)
	returns true if the parameter is an exact power of two More...
template<typename T >
T	mpblocks::cuda::log2 (T x)
	if x is a power of two then it returns the log of x with base 2 More...
template<typename T >
T	mpblocks::cuda::nextPow2 (T x)
	returns the smallest power of two that is not less than x More...
template<typename T >
T	mpblocks::cuda::prevPow2 (T x)
	returns the largest power of two that is not greater than x More...
template<typename T >
T	mpblocks::cuda::times2 (const T &x)
	returns x*2 (using bit shift) More...
template<typename T >
T	mpblocks::cuda::twoPow (T x)
	returns 2 to the power of x (2^x) More...

Detailed Description

inline functions for fast math involving powers of two

Date

Feb 28, 2011

Author

Josh Bialkowski (jbial.nosp@m.k@mi.nosp@m.t.edu) These functions aren't antything special, it just makes the code a lot easier to read instead of trying to decode all these bit operations

Definition in file powersOfTwo.h.