packing.hpp File Reference

#include <cstddef>
#include <cstring>

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Functions
template<typename FloatType >
void	fft_pack_block (FloatType const *const in, FloatType *const out, int const *start, int const *size, int const *dim, int element)
	Pack a 3D-block of size size starting at start of an input 3D-grid in with dimension dim into an output 3D-block out.
template<typename FloatType >
void	fft_unpack_block (FloatType const *const in, FloatType *const out, int const *start, int const *size, int const *dim, int element)
	Unpack a 3D-block in of size size into an output 3D-grid out of size dim starting at position start.

Function Documentation

fft_pack_block()

template<typename FloatType >

void fft_pack_block	(	FloatType const *const	in,
		FloatType *const	out,
		int const *	start,
		int const *	size,
		int const *	dim,
		int	element
	)

Pack a 3D-block of size size starting at start of an input 3D-grid in with dimension dim into an output 3D-block out.

The block is stored in 'row-major-order' or 'C-order', that means the first index is changing slowest when running through the linear array. The element (i0 (slow), i1 (mid), i2 (fast)) has the linear index li = i2 + size[2] * (i1 + (size[1] * i0)).

Parameters

[in]	in	pointer to input 3D-grid.
[out]	out	pointer to output 3D-block.
[in]	start	start index of the block in the input 3D-grid.
[in]	size	size of the output 3D-block.
[in]	dim	size of the input 3D-grid.
[in]	element	size of a grid element (e.g. 1 for Real, 2 for Complex).

Definition at line 44 of file packing.hpp.

Referenced by p3m_send_mesh< FloatType >::gather_grid(), fft::fft_data_struct< FloatType >::initialize_fft(), and p3m_send_mesh< FloatType >::spread_grid().

fft_unpack_block()

template<typename FloatType >

void fft_unpack_block	(	FloatType const *const	in,
		FloatType *const	out,
		int const *	start,
		int const *	size,
		int const *	dim,
		int	element
	)

Unpack a 3D-block in of size size into an output 3D-grid out of size dim starting at position start.

See also fft_pack_block.

Parameters

[in]	in	pointer to input 3D-block.
[out]	out	pointer to output 3D-grid.
[in]	start	start index of the block in the input 3D-grid.
[in]	size	size of the input 3D-block.
[in]	dim	size of the output 3D-grid.
[in]	element	size of a grid element (e.g. 1 for Real, 2 for Complex).

Definition at line 83 of file packing.hpp.

Referenced by p3m_send_mesh< FloatType >::spread_grid().