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Showing content from https://kokkos.github.io/kokkos-core-wiki/API/algorithms/std-algorithms/all/StdRotate.html below:

rotate - Kokkos documentation

Header: Kokkos_StdAlgorithms.hpp

Swaps the elements in the range or in view in such a way that the element n_first or view(n_location) becomes the first element of the new range and n_first - 1 becomes the last element.

Warning

This is currently inside the Kokkos::Experimental namespace.

template <class ExecutionSpace, class IteratorType>
IteratorType rotate(const ExecutionSpace& exespace,                            (1)
                    IteratorType first,
                    IteratorType n_first,
                    IteratorType last);

template <class ExecutionSpace, class IteratorType>
IteratorType rotate(const std::string& label, const ExecutionSpace& exespace,  (2)
                    IteratorType first,
                    IteratorType n_first,
                    IteratorType last);

template <class ExecutionSpace, class DataType, class... Properties>
auto rotate(const ExecutionSpace& exespace,                                    (3)
            const Kokkos::View<DataType, Properties...>& view,
            std::size_t n_location);

template <class ExecutionSpace, class DataType, class... Properties>
auto rotate(const std::string& label, const ExecutionSpace& exespace,          (4)
            const Kokkos::View<DataType, Properties...>& view,
            std::size_t n_location);

Added in version 4.2.

template <class TeamHandleType, class IteratorType>
KOKKOS_FUNCTION
IteratorType rotate(const TeamHandleType& teamHandle,                          (5)
                    IteratorType first,
                    IteratorType n_first,
                    IteratorType last);

template <class TeamHandleType, class DataType, class... Properties>
KOKKOS_FUNCTION
auto rotate(const TeamHandleType& teamHandle,                                  (6)
            const Kokkos::View<DataType, Properties...>& view,
            std::size_t n_location);

• exespace: execution space instance

• teamHandle: team handle instance given inside a parallel region when using a TeamPolicy

• label: string forwarded to internal parallel kernels for debugging purposes

  • 1: The default string is “Kokkos::rotate_iterator_api_default”.

  • 3: The default string is “Kokkos::rotate_view_api_default”.

  • NOTE: overloads accepting a team handle do not use a label internally

• first, last: range of elements to modify

  • must be random access iterators, e.g., returned from Kokkos::Experimental::(c)begin/(c)end

  • must represent a valid range, i.e., last >= first

  • must be accessible from exespace or from the execution space associated with the team handle

• n_first: iterator to element that should be the first of the rotated range

  • must be random access iterators, e.g., returned from Kokkos::Experimental::(c)begin/(c)end

  • must be such that [first, n_first) and [n_first, last) are valid ranges.

  • must be accessible from exespace or from the execution space associated with the team handle

• view:

  • must be rank-1, and have LayoutLeft, LayoutRight, or LayoutStride

  • must be accessible from exespace or from the execution space associated with the team handle

• n_location: integer value identifying the element to rotate about

• 1, 2, 5: Returns the iterator computed as first + (last - n_first)

• 3, 4, 6: Returns Kokkos::begin(view) + (Kokkos::end(view) - n_location)

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