Contains functions to aid in multidimensional indexing. More...

Classes
struct	ConditionalMultiply
	A helper struct to multiply two numbers. More...

struct	ConditionalMultiply< true >
	A specialization of ConditionalMultiply that skips the multiplication. More...

Functions
template<int SIZE, typename T >
LVARRAY_HOST_DEVICE constexpr std::enable_if_t<(SIZE==1), T >	multiplyAll (T const *const LVARRAY_RESTRICT values)

template<int SIZE, typename T >
LVARRAY_HOST_DEVICE constexpr std::enable_if_t<(SIZE > 1), T >	multiplyAll (T const *const LVARRAY_RESTRICT values)

template<int USD, typename INDEX_TYPE , typename INDEX >
LVARRAY_HOST_DEVICE constexpr INDEX_TYPE	getLinearIndex (INDEX_TYPE const *const LVARRAY_RESTRICT strides, INDEX const index)
	Get the index into a one dimensional space. More...

template<int USD, typename INDEX_TYPE , typename INDEX , typename ... REMAINING_INDICES>
LVARRAY_HOST_DEVICE constexpr INDEX_TYPE	getLinearIndex (INDEX_TYPE const *const LVARRAY_RESTRICT strides, INDEX const index, REMAINING_INDICES const ... indices)
	Get the index into a a multidimensional space. More...

std::string	getIndexString ()

template<typename INDEX , typename ... REMAINING_INDICES>
std::string	getIndexString (INDEX const index, REMAINING_INDICES const ... indices)

template<typename INDEX_TYPE , typename ... INDICES>
std::string	printDimsAndIndices (INDEX_TYPE const *const LVARRAY_RESTRICT dims, INDICES const ... indices)

template<typename INDEX_TYPE , typename ... INDICES>
LVARRAY_HOST_DEVICE constexpr bool	invalidIndices (INDEX_TYPE const *const LVARRAY_RESTRICT dims, INDICES const ... indices)

template<typename INDEX_TYPE , typename ... INDICES>
LVARRAY_HOST_DEVICE void	checkIndices (INDEX_TYPE const *const LVARRAY_RESTRICT dims, INDICES const ... indices)
	Check that the `indices` are with `dims` , if not the program is aborted. More...

template<typename PERMUTATION , typename INDEX_TYPE , camp::idx_t NDIM>
LVARRAY_HOST_DEVICE typeManipulation::CArray< INDEX_TYPE, NDIM >	calculateStrides (typeManipulation::CArray< INDEX_TYPE, NDIM > const &dims)
	Calculate the strides given the dimensions and permutation. More...

Detailed Description

Contains functions to aid in multidimensional indexing.

Function Documentation

◆ calculateStrides()

template<typename PERMUTATION , typename INDEX_TYPE , camp::idx_t NDIM>

LVARRAY_HOST_DEVICE typeManipulation::CArray< INDEX_TYPE, NDIM > LvArray::indexing::calculateStrides ( typeManipulation::CArray< INDEX_TYPE, NDIM > const & dims )

inline

Calculate the strides given the dimensions and permutation.

Template Parameters

PERMUTATION	The permutation to apply to the dimensions to calculate the strides.
INDEX_TYPE	The integral type used for the dimensions of the space.
NDIM	The number of dimensions.

Parameters

dims	The size of each dimension.

Returns: The strides of each dimension.

Note: Adapted from RAJA::make_permuted_layout.

◆ checkIndices()

template<typename INDEX_TYPE , typename ... INDICES>

LVARRAY_HOST_DEVICE void LvArray::indexing::checkIndices	(	INDEX_TYPE const *const LVARRAY_RESTRICT	dims,
		INDICES const ...	indices
	)

inline

Check that the indices are with dims , if not the program is aborted.

Template Parameters

INDEX_TYPE	The integral type used for the dimensions of the space.
INDICES	A variadic pack of the integral types of the indices.

Parameters

dims	A pointer to the dimensions of the space.
indices	A variadic pack of the indices.

◆ getIndexString() [1/2]

std::string LvArray::indexing::getIndexString ( )

inline

Returns: A string representing an empty set of indices.

◆ getIndexString() [2/2]

template<typename INDEX , typename ... REMAINING_INDICES>

std::string LvArray::indexing::getIndexString	(	INDEX const	index,
		REMAINING_INDICES const ...	indices
	)

Template Parameters

INDEX	The integral type of the first index.
REMAINING_INDICES	A variadic pack of the integral types of the remaining indices.

Returns: A string representing the indices.

Parameters

index	The first index.
indices	A variadic pack of indices to the remaining dimensions.

◆ getLinearIndex() [1/2]

template<int USD, typename INDEX_TYPE , typename INDEX >

LVARRAY_HOST_DEVICE constexpr INDEX_TYPE LvArray::indexing::getLinearIndex	(	INDEX_TYPE const *const LVARRAY_RESTRICT	strides,
		INDEX const	index
	)

inline

Get the index into a one dimensional space.

Template Parameters

USD	The unit stride dimension of strides.
INDEX_TYPE	The integral type of the strides and the type to return.
INDEX	The integral type of the index.

Parameters

strides	A pointer to the stride of the dimension.
index	The index into the dimension.

Note: If USD == 0 then strides[ 0 ] is assumed to equal 1.

Returns: The product of index with strides[ 0 ].

◆ getLinearIndex() [2/2]

template<int USD, typename INDEX_TYPE , typename INDEX , typename ... REMAINING_INDICES>

LVARRAY_HOST_DEVICE constexpr INDEX_TYPE LvArray::indexing::getLinearIndex	(	INDEX_TYPE const *const LVARRAY_RESTRICT	strides,
		INDEX const	index,
		REMAINING_INDICES const ...	indices
	)

inline

Get the index into a a multidimensional space.

Template Parameters

USD	The unit stride dimension of strides.
INDEX_TYPE	The integral type of the strides and the type to return.
INDEX	The integral type of the first index.
REMAINING_INDICES	A variadic pack of the integral types of the remaining indices.

Parameters

strides	A pointer to the strides of the dimension.
index	The index into the first dimension.
indices	A variadic pack of the indices to the remaining dimensions.

Note: If 0 <= USD < the number of dimensions then strides[ USD ] is assumed to equal 1.

Returns: The dot product of strides with ( index, indices ... ).

◆ invalidIndices()

template<typename INDEX_TYPE , typename ... INDICES>

LVARRAY_HOST_DEVICE constexpr bool LvArray::indexing::invalidIndices	(	INDEX_TYPE const *const LVARRAY_RESTRICT	dims,
		INDICES const ...	indices
	)

inline

Template Parameters

INDEX_TYPE	The integral type used for the dimensions of the space.
INDICES	A variadic pack of the integral types of the indices.

Returns: If the indices into the multidimensional space are invalid.

Parameters

dims	A pointer to the dimensions of the space.
indices	A variadic pack of the indices.

◆ multiplyAll() [1/2]

template<int SIZE, typename T >

LVARRAY_HOST_DEVICE constexpr std::enable_if_t< (SIZE == 1), T > LvArray::indexing::multiplyAll ( T const *const LVARRAY_RESTRICT values )

inline

Template Parameters

SIZE	The number of values to multiply together.
T	The type of the values.

Returns: The product of the values in [ values, values + SIZE )

Parameters

values A pointer to the values to multiply together.

◆ multiplyAll() [2/2]

template<int SIZE, typename T >

LVARRAY_HOST_DEVICE constexpr std::enable_if_t< (SIZE > 1), T > LvArray::indexing::multiplyAll ( T const *const LVARRAY_RESTRICT values )

inline

Template Parameters

SIZE	The number of values to multiply together.
T	The type of the values.

Returns: The product of the values in [ values, values + SIZE )

Parameters

values A pointer to the values to multiply together.

◆ printDimsAndIndices()

template<typename INDEX_TYPE , typename ... INDICES>

std::string LvArray::indexing::printDimsAndIndices	(	INDEX_TYPE const *const LVARRAY_RESTRICT	dims,
		INDICES const ...	indices
	)

Template Parameters

INDEX_TYPE	The integral type of the dimensions.
INDICES	A variadic pack of the integral types of the indices.

Returns: A string representing the dimensions of the multidimensional space and the indices into it.

Parameters

dims	A pointer to the dimensions of the space.
indices	A variadic pack of indices.

Classes

Functions

Detailed Description

Function Documentation

◆ calculateStrides()

◆ checkIndices()

◆ getIndexString() [1/2]

◆ getIndexString() [2/2]

◆ getLinearIndex() [1/2]

◆ getLinearIndex() [2/2]

◆ invalidIndices()

◆ multiplyAll() [1/2]

◆ multiplyAll() [2/2]

◆ printDimsAndIndices()