hila_fft< cmplx_t > Class Template Reference

#include <fft.h>

Public Member Functions
template<typename T >
void	collect_data (const Field< T > &f)
template<typename T >
void	full_transform (const Field< T > &input, Field< T > &result, const CoordinateVector &directions)
	Do the transform itself (fft or reflect only)
void	gather_data ()
	send column data to nodes
void	reflect ()
void	reshuffle_data (Direction prev_dir)
template<typename T >
void	save_result (Field< T > &f)
	Inverse of the fft_collect_data: write fft'd data from receive_buf to field.
void	scatter_data ()
	inverse of gather_data
void	setup_direction (Direction _dir)
	Initialize fft to Direction dir.
void	transform ()
	transform does the actual fft.

Detailed Description

template<typename cmplx_t>
class hila_fft< cmplx_t >

Class to hold fft relevant variables - note: fft.cpp holds static info, which is not here

Definition at line 88 of file fft.h.

Member Function Documentation

collect_data()

template<typename cmplx_t >

template<typename T >

void hila_fft< cmplx_t >::collect_data ( const Field< T > &  f )

inline

Collect the data from field to send_buf for sending or fft'ing. Order: Direction dir goes fastest, then the index to complex data in T, and other directions are slowest.

Definition at line 189 of file fft.h.

reflect()

template<typename cmplx_t >

void hila_fft< cmplx_t >::reflect

inline

Separate reflect operation Reflect flips the coordinates so that negative direction becomes positive, and x=0 plane remains, r(x) <- f(L - x) - note that x == 0 layer is as before r(0) = f(0), r(1) = f(L-1), r(2) = f(L-2) ...

Definition at line 516 of file fft_gpu_transform.h.

reshuffle_data()

template<typename cmplx_t >

void hila_fft< cmplx_t >::reshuffle_data ( Direction  prev_dir )

inline

Reshuffle data, given that previous fft dir was to prev_dir and now to dir Assuming here that the data is in receive_buf after fft and copy to send_buf This requires swapping send_buf and receive_buf ptrs after 1 fft

Definition at line 258 of file fft.h.

transform()

template<typename cmplx_t >

void hila_fft< cmplx_t >::transform

transform does the actual fft.

Define hila_fft<>::transform() -functions and scatter() / gather() -functions for fftw

This is not a standalone header, it is meant to be #include'd from fft.h .

Definition at line 194 of file fft_gpu_transform.h.

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The documentation for this class was generated from the following files:

• fft.h
• fft_gpu_transform.h
• fft_fftw_transform.h