ippl::FFT< Cos1Transform, Field > Class Template Reference

#include <FFT.h>

Inheritance diagram for ippl::FFT< Cos1Transform, Field >:

Collaboration diagram for ippl::FFT< Cos1Transform, Field >:

Public Member Functions
void	warmup (Field &f)
void	transform (TransformDirection direction, Field &f)

Private Types
using	Base = IN_PLACE_FFT_BASE_CLASS(Field, backendCos1)

Static Private Attributes
static constexpr unsigned	Dim = Field::dim

Detailed Description

template<typename Field>
class ippl::FFT< Cos1Transform, Field >

Cosine type 1 transform class

Definition at line 313 of file FFT.h.

Member Typedef Documentation

Base

template<typename Field>

using ippl::FFT< Cos1Transform, Field >::Base = IN_PLACE_FFT_BASE_CLASS(Field, backendCos1)

private

Definition at line 315 of file FFT.h.

Member Function Documentation

transform()

template<typename Field>

void ippl::FFT< Cos1Transform, Field >::transform	(	TransformDirection	direction,
		Field &	f )

Perform in-place FFT

Parameters

direction	Forward or backward transformation
f	Field whose transformation to compute (and overwrite)

This rescaling is needed to match the normalization constant between fftw and the other gpu interfaces. fftw rescales with an extra factor of 8.

This copy to a temporary Kokkos view is needed because of following reasons: 1) heffte wants the input and output fields without ghost layers 2) heffte accepts data in layout left (by default) eventhough this can be changed during heffte box creation

This rescaling is needed to match the normalization constant between fftw and the other gpu interfaces. fftw rescales with an extra factor of 8.

Definition at line 390 of file FFT.hpp.

References ippl::apply(), ippl::BACKWARD, Dim, ippl::FORWARD, ippl::BareField< T, Dim, ViewArgs >::getNghost(), ippl::BareField< T, Dim, ViewArgs >::getOwned(), ippl::getRangePolicy(), ippl::BareField< T, Dim, ViewArgs >::getView(), ippl::parallel_for(), ippl::detail::shrinkView(), and ippl::NDIndex< Dim >::size().

Referenced by warmup().

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warmup()

template<typename Field>

void ippl::FFT< Cos1Transform, Field >::warmup

(

Field &

f

)

Warmup the FFT object by forward & backward FFT on an empty field

Parameters

f	Field whose transformation to compute (and overwrite)

Definition at line 384 of file FFT.hpp.

References ippl::BACKWARD, ippl::FORWARD, and transform().

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Member Data Documentation

Dim

template<typename Field>

unsigned ippl::FFT< Cos1Transform, Field >::Dim = Field::dim

staticconstexprprivate

Definition at line 314 of file FFT.h.

Referenced by transform().

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

• FFT.h
• FFT.hpp