jcuda.jcufft

Class JCufft

java.lang.Object

jcuda.jcufft.JCufft

public class JCufft
extends Object

Java bindings for CUFFT, the NVIDIA CUDA FFT library.

Most comments are taken from the CUFFT library documentation

Field Summary

Fields

Modifier and Type	Field and Description
static int	CUFFT_FORWARD CUFFT transform direction
static int	CUFFT_INVERSE CUFFT transform direction

Method Summary

Modifier and Type	Method and Description
static int	cufftCreate(cufftHandle cufftHandle)
static int	cufftDestroy(cufftHandle plan) Frees all GPU resources associated with a CUFFT plan and destroys the internal plan data structure.
static int	cufftEstimate1d(int nx, int type, int batch, long[] workSize)
static int	cufftEstimate2d(int nx, int ny, int type, long[] workSize)
static int	cufftEstimate3d(int nx, int ny, int nz, int type, long[] workSize)
static int	cufftEstimateMany(int rank, int[] n, int[] inembed, int istride, int idist, int[] onembed, int ostride, int odist, int type, int batch, long[] workSize)
static int	cufftExecC2C(cufftHandle plan, float[] cIdata, float[] cOdata, int direction) Convenience method for cufftExecC2C(cufftHandle, Pointer, Pointer, int).
static int	cufftExecC2C(cufftHandle plan, Pointer cIdata, Pointer cOdata, int direction) Executes a CUFFT complex-to-complex transform plan.
static int	cufftExecC2R(cufftHandle plan, float[] cIdata, float[] rOdata) Convenience method for cufftExecC2R(cufftHandle, Pointer, Pointer).
static int	cufftExecC2R(cufftHandle plan, Pointer cIdata, Pointer rOdata) Executes a CUFFT complex-to-real (implicitly inverse) transform plan.
static int	cufftExecD2Z(cufftHandle plan, double[] rIdata, double[] cOdata) Convenience method for cufftExecD2Z(cufftHandle, Pointer, Pointer).
static int	cufftExecD2Z(cufftHandle plan, Pointer rIdata, Pointer cOdata) Executes a CUFFT real-to-complex (implicitly forward) transform plan for double precision values.
static int	cufftExecR2C(cufftHandle plan, float[] rIdata, float[] cOdata) Convenience method for cufftExecR2C(cufftHandle, Pointer, Pointer).
static int	cufftExecR2C(cufftHandle plan, Pointer rIdata, Pointer cOdata) Executes a CUFFT real-to-complex (implicitly forward) transform plan.
static int	cufftExecZ2D(cufftHandle plan, double[] cIdata, double[] rOdata) Convenience method for cufftExecZ2D(cufftHandle, Pointer, Pointer).
static int	cufftExecZ2D(cufftHandle plan, Pointer cIdata, Pointer rOdata) Executes a CUFFT complex-to-real (implicitly inverse) transform plan for double precision values.
static int	cufftExecZ2Z(cufftHandle plan, double[] cIdata, double[] cOdata, int direction) Convenience method for cufftExecZ2Z(cufftHandle, Pointer, Pointer, int).
static int	cufftExecZ2Z(cufftHandle plan, Pointer cIdata, Pointer cOdata, int direction) Executes a CUFFT complex-to-complex transform plan for double precision values.
static int	cufftGetProperty(int type, int[] value) Obtains the value of the specified property.
static int	cufftGetSize(cufftHandle handle, long[] workSize)
static int	cufftGetSize1d(cufftHandle handle, int nx, int type, int batch, long[] workSize)
static int	cufftGetSize2d(cufftHandle handle, int nx, int ny, int type, long[] workSize)
static int	cufftGetSize3d(cufftHandle handle, int nx, int ny, int nz, int type, long[] workSize)
static int	cufftGetSizeMany(cufftHandle handle, int rank, int[] n, int[] inembed, int istride, int idist, int[] onembed, int ostride, int odist, int type, int batch, long[] workArea)
static int	cufftGetSizeMany64(cufftHandle plan, int rank, long[] n, long[] inembed, long istride, long idist, long[] onembed, long ostride, long odist, int type, long batch, long[] workSize)
static int	cufftGetVersion(int[] version) Writes the CUFFT version into the given argument.
static int	cufftMakePlan1d(cufftHandle plan, int nx, int type, int batch, long[] workSize)
static int	cufftMakePlan2d(cufftHandle plan, int nx, int ny, int type, long[] workSize)
static int	cufftMakePlan3d(cufftHandle plan, int nx, int ny, int nz, int type, long[] workSize)
static int	cufftMakePlanMany(cufftHandle plan, int rank, int[] n, int[] inembed, int istride, int idist, int[] onembed, int ostride, int odist, int type, int batch, long[] workSize)
static int	cufftMakePlanMany64(cufftHandle plan, int rank, long[] n, long[] inembed, long istride, long idist, long[] onembed, long ostride, long odist, int type, long batch, long[] workSize)
static int	cufftPlan1d(cufftHandle plan, int nx, int type, int batch) Creates a 1D FFT plan configuration for a specified signal size and data type.
static int	cufftPlan2d(cufftHandle plan, int nx, int ny, int type) Creates a 2D FFT plan configuration according to specified signal sizes and data type.
static int	cufftPlan3d(cufftHandle plan, int nx, int ny, int nz, int type) Creates a 3D FFT plan configuration according to specified signal sizes and data type.
static int	cufftPlanMany(cufftHandle plan, int rank, int[] n, int[] inembed, int istride, int idist, int[] onembed, int ostride, int odist, int type, int batch) Creates a FFT plan configuration of dimension rank, with sizes specified in the array n.
static int	cufftSetAutoAllocation(cufftHandle plan, int autoAllocate)
static int	cufftSetCompatibilityMode(cufftHandle plan, int mode) Deprecated. This function was removed in CUDA 9.1, and will throw an UnsupportedOperationException
static int	cufftSetStream(cufftHandle plan, cudaStream_t stream) Associates a CUDA stream with a CUFFT plan.
static int	cufftSetWorkArea(cufftHandle plan, Pointer workArea)
static void	initialize() Initializes the native library.
static void	setExceptionsEnabled(boolean enabled) Enables or disables exceptions.
static void	setLogLevel(LogLevel logLevel) Set the specified log level for the JCufft library.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CUFFT_FORWARD

public static final int CUFFT_FORWARD

CUFFT transform direction

See Also:

Constant Field Values

CUFFT_INVERSE

public static final int CUFFT_INVERSE

CUFFT transform direction

See Also:

Constant Field Values

Method Detail

initialize

public static void initialize()

Initializes the native library. Note that this method does not have to be called explicitly by the user of the library: The library will automatically be loaded when this class is loaded.

setLogLevel

public static void setLogLevel(LogLevel logLevel)

Set the specified log level for the JCufft library.

Currently supported log levels:
LOG_QUIET: Never print anything
LOG_ERROR: Print error messages
LOG_TRACE: Print a trace of all native function calls

Parameters:

logLevel - The log level to use.

setExceptionsEnabled

public static void setExceptionsEnabled(boolean enabled)

Enables or disables exceptions. By default, the methods of this class only return the cufftResult error code from the underlying CUDA function. If exceptions are enabled, a CudaException with a detailed error message will be thrown if a method is about to return a result code that is not cufftResult.CUFFT_SUCCESS

Parameters:

enabled - Whether exceptions are enabled

cufftGetVersion

public static int cufftGetVersion(int[] version)

Writes the CUFFT version into the given argument.

Parameters:

version - The version

Returns:

The cufftResult code.

cufftGetProperty

public static int cufftGetProperty(int type,
                                   int[] value)

Obtains the value of the specified property.

Parameters:

type - The libraryPropertyType

value - The value

Returns:

CUFFT_SUCCESS, CUFFT_INVALID_TYPE, CUFFT_INVALID_VALUE

cufftPlan1d

public static int cufftPlan1d(cufftHandle plan,
                              int nx,
                              int type,
                              int batch)

 Creates a 1D FFT plan configuration for a specified signal size and data
 type.

 cufftResult cufftPlan1d( cufftHandle *plan, int nx, cufftType type, int batch );

 The batch input parameter tells CUFFT how many 1D transforms to configure.

 Input
 ----
 plan  Pointer to a cufftHandle object
 nx    The transform size (e.g., 256 for a 256-point FFT)
 type  The transform data type (e.g., CUFFT_C2C for complex to complex)
 batch Number of transforms of size nx

 Output
 ----
 plan     Contains a CUFFT 1D plan handle value

 Return Values
 ----
 CUFFT_SETUP_FAILED CUFFT library failed to initialize.
 CUFFT_INVALID_SIZE The nx parameter is not a supported size.
 CUFFT_INVALID_TYPE The type parameter is not supported.
 CUFFT_ALLOC_FAILED Allocation of GPU resources for the plan failed.
 CUFFT_SUCCESS      CUFFT successfully created the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 
 NOTE: Batch sizes other than 1 for cufftPlan1d() have been
 deprecated as of CUDA 6.0RC. Use cufftPlanMany() for
 multiple batch execution.

cufftPlan2d

public static int cufftPlan2d(cufftHandle plan,
                              int nx,
                              int ny,
                              int type)

 Creates a 2D FFT plan configuration according to specified signal sizes
 and data type.

 cufftResult cufftPlan2d( cufftHandle *plan, int nx, int ny, cufftType type );

 This function is the same as cufftPlan1d() except that
 it takes a second size parameter, ny, and does not support batching.

 Input
 ----
 plan Pointer to a cufftHandle object
 nx   The transform size in the X dimension (number of rows)
 ny   The transform size in the Y dimension (number of columns)
 type The transform data type (e.g., CUFFT_C2R for complex to real)

 Output
 ----
 plan Contains a CUFFT 2D plan handle value

 Return Values
 ----
 CUFFT_SETUP_FAILED CUFFT library failed to initialize.
 CUFFT_INVALID_SIZE The nx or ny parameter is not a supported size.
 CUFFT_INVALID_TYPE The type parameter is not supported.
 CUFFT_ALLOC_FAILED Allocation of GPU resources for the plan failed.
 CUFFT_SUCCESS      CUFFT successfully created the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftPlan3d

public static int cufftPlan3d(cufftHandle plan,
                              int nx,
                              int ny,
                              int nz,
                              int type)

 Creates a 3D FFT plan configuration according to specified signal sizes
 and data type.

 cufftResult cufftPlan3d( cufftHandle *plan, int nx, int ny, int nz, cufftType type );

 This function is the same as cufftPlan2d() except that
 it takes a third size parameter nz.

 Input
 ----
 plan Pointer to a cufftHandle object
 nx The transform size in the X dimension
 ny The transform size in the Y dimension
 nz The transform size in the Z dimension
 type The transform data type (e.g., CUFFT_R2C for real to complex)

 Output
 ----
 plan Contains a CUFFT 3D plan handle value

 Return Values
 ----
 CUFFT_SETUP_FAILED CUFFT library failed to initialize.
 CUFFT_INVALID_SIZE Parameter nx, ny, or nz is not a supported size.
 CUFFT_INVALID_TYPE The type parameter is not supported.
 CUFFT_ALLOC_FAILED Allocation of GPU resources for the plan failed.
 CUFFT_SUCCESS      CUFFT successfully created the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftPlanMany

public static int cufftPlanMany(cufftHandle plan,
                                int rank,
                                int[] n,
                                int[] inembed,
                                int istride,
                                int idist,
                                int[] onembed,
                                int ostride,
                                int odist,
                                int type,
                                int batch)

 Creates a FFT plan configuration of dimension rank, with sizes
 specified in the array n.

 cufftResult cufftPlanMany(cufftHandle *plan, int rank, int *n,
     int *inembed, int istride, int idist,
     int *onembed, int ostride, int odist,
     cufftType type, int batch );

 The batch input parameter tells CUFFT how many transforms to
 configure in parallel. With this function, batched plans of
 any dimension may be created. Input parameters inembed, istride,
 and idist and output parameters onembed, ostride, and odist
 will allow setup of noncontiguous input data in a future version.
 Note that for CUFFT 3.0, these parameters are ignored and the
 layout of batched data must be side-by-side and not interleaved.

 Input
 ----
 plan Pointer to a cufftHandle object
 rank Dimensionality of the transform (1, 2, or 3)
 n An array of size rank, describing the size of each dimension
 inembed Unused: pass NULL
 istride Unused: pass 1
 idist Unused: pass 0
 onembed Unused: pass NULL
 ostride Unused: pass 1
 odist Unused: pass 0
 type Transform data type (e.g., CUFFT_C2C, as per other CUFFT calls)
 batch Batch size for this transform

 Output
 ----
 plan Contains a CUFFT plan handle

 Return Values
 ----
 CUFFT_SETUP_FAILED CUFFT library failed to initialize.
 CUFFT_INVALID_SIZE Parameter is not a supported size.
 CUFFT_INVALID_TYPE The type parameter is not supported
 

cufftMakePlan1d

public static int cufftMakePlan1d(cufftHandle plan,
                                  int nx,
                                  int type,
                                  int batch,
                                  long[] workSize)

cufftMakePlan2d

public static int cufftMakePlan2d(cufftHandle plan,
                                  int nx,
                                  int ny,
                                  int type,
                                  long[] workSize)

cufftMakePlan3d

public static int cufftMakePlan3d(cufftHandle plan,
                                  int nx,
                                  int ny,
                                  int nz,
                                  int type,
                                  long[] workSize)

cufftMakePlanMany

public static int cufftMakePlanMany(cufftHandle plan,
                                    int rank,
                                    int[] n,
                                    int[] inembed,
                                    int istride,
                                    int idist,
                                    int[] onembed,
                                    int ostride,
                                    int odist,
                                    int type,
                                    int batch,
                                    long[] workSize)

cufftMakePlanMany64

public static int cufftMakePlanMany64(cufftHandle plan,
                                      int rank,
                                      long[] n,
                                      long[] inembed,
                                      long istride,
                                      long idist,
                                      long[] onembed,
                                      long ostride,
                                      long odist,
                                      int type,
                                      long batch,
                                      long[] workSize)

cufftGetSizeMany64

public static int cufftGetSizeMany64(cufftHandle plan,
                                     int rank,
                                     long[] n,
                                     long[] inembed,
                                     long istride,
                                     long idist,
                                     long[] onembed,
                                     long ostride,
                                     long odist,
                                     int type,
                                     long batch,
                                     long[] workSize)

cufftEstimate1d

public static int cufftEstimate1d(int nx,
                                  int type,
                                  int batch,
                                  long[] workSize)

cufftEstimate2d

public static int cufftEstimate2d(int nx,
                                  int ny,
                                  int type,
                                  long[] workSize)

cufftEstimate3d

public static int cufftEstimate3d(int nx,
                                  int ny,
                                  int nz,
                                  int type,
                                  long[] workSize)

cufftEstimateMany

public static int cufftEstimateMany(int rank,
                                    int[] n,
                                    int[] inembed,
                                    int istride,
                                    int idist,
                                    int[] onembed,
                                    int ostride,
                                    int odist,
                                    int type,
                                    int batch,
                                    long[] workSize)

cufftCreate

public static int cufftCreate(cufftHandle cufftHandle)

cufftGetSize1d

public static int cufftGetSize1d(cufftHandle handle,
                                 int nx,
                                 int type,
                                 int batch,
                                 long[] workSize)

cufftGetSize2d

public static int cufftGetSize2d(cufftHandle handle,
                                 int nx,
                                 int ny,
                                 int type,
                                 long[] workSize)

cufftGetSize3d

public static int cufftGetSize3d(cufftHandle handle,
                                 int nx,
                                 int ny,
                                 int nz,
                                 int type,
                                 long[] workSize)

cufftGetSizeMany

public static int cufftGetSizeMany(cufftHandle handle,
                                   int rank,
                                   int[] n,
                                   int[] inembed,
                                   int istride,
                                   int idist,
                                   int[] onembed,
                                   int ostride,
                                   int odist,
                                   int type,
                                   int batch,
                                   long[] workArea)

cufftGetSize

public static int cufftGetSize(cufftHandle handle,
                               long[] workSize)

cufftSetWorkArea

public static int cufftSetWorkArea(cufftHandle plan,
                                   Pointer workArea)

cufftSetAutoAllocation

public static int cufftSetAutoAllocation(cufftHandle plan,
                                         int autoAllocate)

cufftDestroy

public static int cufftDestroy(cufftHandle plan)

 Frees all GPU resources associated with a CUFFT plan and destroys the
 internal plan data structure.

 cufftResult cufftDestroy( cufftHandle plan );

 This function should be called once a plan
 is no longer needed to avoid wasting GPU memory.

 Input
 ----
 plan The cufftHandle object of the plan to be destroyed.

 Return Values
 ----
 CUFFT_SETUP_FAILED    CUFFT library failed to initialize.
 CUFFT_SHUTDOWN_FAILED CUFFT library failed to shut down.
 CUFFT_INVALID_PLAN    The plan parameter is not a valid handle.
 CUFFT_SUCCESS         CUFFT successfully destroyed the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftSetStream

public static int cufftSetStream(cufftHandle plan,
                                 cudaStream_t stream)

 Associates a CUDA stream with a CUFFT plan.

 cufftResult cufftSetStream( cufftHandle plan, cudaStream_t stream );

 All kernel launches made during plan execution are now done through
 the associated stream, enabling overlap with activity in other
 streams (for example, data copying). The association remains until
 the plan is destroyed or the stream is changed with another call
 to cufftSetStream().

 Input
 plan The cufftHandle object to associate with the stream
 stream A valid CUDA stream created with cudaStreamCreate() (or 0
 for the default stream)

 Return Values
 CUFFT_INVALID_PLAN The plan parameter is not a valid handle.
 CUFFT_SUCCESS The stream was successfully associated with the plan.
 

cufftSetCompatibilityMode

public static int cufftSetCompatibilityMode(cufftHandle plan,
                                            int mode)

Deprecated. This function was removed in CUDA 9.1, and will throw an UnsupportedOperationException

 Configures the layout of CUFFT output in FFTW-compatible modes.

 When FFTW compatibility is desired, it can be configured for padding
 only, for asymmetric complex inputs only, or to be fully compatible.

 Input
 plan The cufftHandle object to associate with the stream
 mode The cufftCompatibility option to be used:
     CUFFT_COMPATIBILITY_NATIVE:
     Disable any FFTW compatibility mode.
     CUFFT_COMPATIBILITY_FFTW_PADDING:
     Support FFTW data padding. (Default)
     CUFFT_COMPATIBILITY_FFTW_ASYMMETRIC:
     Waive the C2R symmetry requirement.
     Should be used with asymmetric input.
     CUFFT_COMPATIBILITY_FFTW_ALL:
     Enable full FFTW compatibility.

 Return Values
 CUFFT_SETUP_FAILED CUFFT library failed to initialize.
 CUFFT_INVALID_PLAN The plan parameter is not a valid handle.
 CUFFT_SUCCESS CUFFT successfully executed the FFT plan.
 

cufftExecC2C

public static int cufftExecC2C(cufftHandle plan,
                               Pointer cIdata,
                               Pointer cOdata,
                               int direction)

 Executes a CUFFT complex-to-complex transform plan.

 cufftResult cufftExecC2C( cufftHandle plan, cufftComplex *idata, cufftComplex *odata, int direction );

 CUFFT uses as input data the GPU memory pointed to by the idata parameter. This
 function stores the Fourier coefficients in the odata array. If idata and
 odata are the same, this method does an in-place transform.

 Input
 ----
 plan      The cufftHandle object for the plan to update
 idata     Pointer to the input data (in GPU memory) to transform
 odata     Pointer to the output data (in GPU memory)
 direction The transform direction: CUFFT_FORWARD or CUFFT_INVERSE

 Output
 ----
 odata Contains the complex Fourier coefficients

 Return Values
 ----
 CUFFT_SETUP_FAILED  CUFFT library failed to initialize.
 CUFFT_INVALID_PLAN  The plan parameter is not a valid handle.
 CUFFT_INVALID_VALUE The idata, odata, and/or direction parameter is not valid.
 CUFFT_EXEC_FAILED   CUFFT failed to execute the transform on GPU.
 CUFFT_SUCCESS       CUFFT successfully executed the FFT plan

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftExecC2C

public static int cufftExecC2C(cufftHandle plan,
                               float[] cIdata,
                               float[] cOdata,
                               int direction)

Convenience method for cufftExecC2C(cufftHandle, Pointer, Pointer, int). Accepts arrays for input and output data and automatically performs the host-device and device-host copies.

See Also:

cufftExecC2C(cufftHandle, Pointer, Pointer, int)

cufftExecR2C

public static int cufftExecR2C(cufftHandle plan,
                               Pointer rIdata,
                               Pointer cOdata)

 Executes a CUFFT real-to-complex (implicitly forward) transform plan.

 cufftResult cufftExecR2C( cufftHandle plan, cufftReal *idata, cufftComplex *odata );

 CUFFT uses as input data the GPU memory pointed to by the idata
 parameter. This function stores the non-redundant Fourier coefficients
 in the odata array. If idata and odata are the same, this method does
 an in-place transform (See CUFFT documentation for details on real
 data FFTs.)

 Input
 ----
 plan      The cufftHandle object for the plan to update
 idata     Pointer to the input data (in GPU memory) to transform
 odata     Pointer to the output data (in GPU memory)
 direction The transform direction: CUFFT_FORWARD or CUFFT_INVERSE

 Output
 ----
 odata Contains the complex Fourier coefficients

 Return Values
 ----
 CUFFT_SETUP_FAILED CUFFT library failed to initialize.
 CUFFT_INVALID_PLAN The plan parameter is not a valid handle.
 CUFFT_INVALID_VALUE The idata, odata, and/or direction parameter is not valid.
 CUFFT_EXEC_FAILED CUFFT failed to execute the transform on GPU.
 CUFFT_SUCCESS CUFFT successfully executed the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftExecR2C

public static int cufftExecR2C(cufftHandle plan,
                               float[] rIdata,
                               float[] cOdata)

Convenience method for cufftExecR2C(cufftHandle, Pointer, Pointer). Accepts arrays for input and output data and automatically performs the host-device and device-host copies.

See Also:

cufftExecR2C(cufftHandle, Pointer, Pointer)

cufftExecC2R

public static int cufftExecC2R(cufftHandle plan,
                               Pointer cIdata,
                               Pointer rOdata)

 Executes a CUFFT complex-to-real (implicitly inverse) transform plan.

 cufftResult cufftExecC2R( cufftHandle plan, cufftComplex *idata, cufftReal *odata );

 CUFFT uses as input data the GPU memory pointed to by the idata
 parameter. The input array holds only the non-redundant complex
 Fourier coefficients. This function stores the real output values in the
 odata array. If idata and odata are the same, this method does an inplace
 transform. (See CUFFT documentation for details on real data FFTs.)

 Input
 ----
 plan The cufftHandle object for the plan to update
 idata Pointer to the complex input data (in GPU memory) to transform
 odata Pointer to the real output data (in GPU memory)

 Output
 ----
 odata Contains the real-valued output data

 Return Values
 ----
 CUFFT_SETUP_FAILED  CUFFT library failed to initialize.
 CUFFT_INVALID_PLAN  The plan parameter is not a valid handle.
 CUFFT_INVALID_VALUE The idata and/or odata parameter is not valid.
 CUFFT_EXEC_FAILED   CUFFT failed to execute the transform on GPU.
 CUFFT_SUCCESS       CUFFT successfully executed the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftExecC2R

public static int cufftExecC2R(cufftHandle plan,
                               float[] cIdata,
                               float[] rOdata)

Convenience method for cufftExecC2R(cufftHandle, Pointer, Pointer). Accepts arrays for input and output data and automatically performs the host-device and device-host copies.

See Also:

cufftExecC2R(cufftHandle, Pointer, Pointer)

cufftExecZ2Z

public static int cufftExecZ2Z(cufftHandle plan,
                               Pointer cIdata,
                               Pointer cOdata,
                               int direction)

 Executes a CUFFT complex-to-complex transform plan for double precision
 values.

 cufftResult cufftExecZ2Z( cufftHandle plan, cufftDoubleComplex *idata, cufftDoubleComplex *odata, int direction );

 CUFFT uses as input data the GPU memory pointed to by the idata parameter. This
 function stores the Fourier coefficients in the odata array. If idata and
 odata are the same, this method does an in-place transform.

 Input
 ----
 plan      The cufftHandle object for the plan to update
 idata     Pointer to the input data (in GPU memory) to transform
 odata     Pointer to the output data (in GPU memory)
 direction The transform direction: CUFFT_FORWARD or CUFFT_INVERSE

 Output
 ----
 odata Contains the complex Fourier coefficients

 Return Values
 ----
 CUFFT_SETUP_FAILED  CUFFT library failed to initialize.
 CUFFT_INVALID_PLAN  The plan parameter is not a valid handle.
 CUFFT_INVALID_VALUE The idata, odata, and/or direction parameter is not valid.
 CUFFT_EXEC_FAILED   CUFFT failed to execute the transform on GPU.
 CUFFT_SUCCESS       CUFFT successfully executed the FFT plan

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftExecZ2Z

public static int cufftExecZ2Z(cufftHandle plan,
                               double[] cIdata,
                               double[] cOdata,
                               int direction)

Convenience method for cufftExecZ2Z(cufftHandle, Pointer, Pointer, int). Accepts arrays for input and output data and automatically performs the host-device and device-host copies.

See Also:

cufftExecZ2Z(cufftHandle, Pointer, Pointer, int)

cufftExecD2Z

public static int cufftExecD2Z(cufftHandle plan,
                               Pointer rIdata,
                               Pointer cOdata)

 Executes a CUFFT real-to-complex (implicitly forward) transform plan
 for double precision values.

 cufftResult cufftExecD2Z( cufftHandle plan, cufftDoubleReal *idata, cufftDoubleComplex *odata );

 CUFFT uses as input data the GPU memory pointed to by the idata
 parameter. This function stores the non-redundant Fourier coefficients
 in the odata array. If idata and odata are the same, this method does
 an in-place transform (See CUFFT documentation for details on real
 data FFTs.)

 Input
 ----
 plan      The cufftHandle object for the plan to update
 idata     Pointer to the input data (in GPU memory) to transform
 odata     Pointer to the output data (in GPU memory)
 direction The transform direction: CUFFT_FORWARD or CUFFT_INVERSE

 Output
 ----
 odata Contains the complex Fourier coefficients

 Return Values
 ----
 CUFFT_SETUP_FAILED CUFFT library failed to initialize.
 CUFFT_INVALID_PLAN The plan parameter is not a valid handle.
 CUFFT_INVALID_VALUE The idata, odata, and/or direction parameter is not valid.
 CUFFT_EXEC_FAILED CUFFT failed to execute the transform on GPU.
 CUFFT_SUCCESS CUFFT successfully executed the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftExecD2Z

public static int cufftExecD2Z(cufftHandle plan,
                               double[] rIdata,
                               double[] cOdata)

Convenience method for cufftExecD2Z(cufftHandle, Pointer, Pointer). Accepts arrays for input and output data and automatically performs the host-device and device-host copies.

See Also:

cufftExecD2Z(cufftHandle, Pointer, Pointer)

cufftExecZ2D

public static int cufftExecZ2D(cufftHandle plan,
                               Pointer cIdata,
                               Pointer rOdata)

 Executes a CUFFT complex-to-real (implicitly inverse) transform plan
 for double precision values.

 cufftResult cufftExecZ2D( cufftHandle plan, cufftDoubleComplex *idata, cufftDoubleReal *odata );

 CUFFT uses as input data the GPU memory pointed to by the idata
 parameter. The input array holds only the non-redundant complex
 Fourier coefficients. This function stores the real output values in the
 odata array. If idata and odata are the same, this method does an inplace
 transform. (See CUFFT documentation for details on real data FFTs.)

 Input
 ----
 plan The cufftHandle object for the plan to update
 idata Pointer to the complex input data (in GPU memory) to transform
 odata Pointer to the real output data (in GPU memory)

 Output
 ----
 odata Contains the real-valued output data

 Return Values
 ----
 CUFFT_SETUP_FAILED  CUFFT library failed to initialize.
 CUFFT_INVALID_PLAN  The plan parameter is not a valid handle.
 CUFFT_INVALID_VALUE The idata and/or odata parameter is not valid.
 CUFFT_EXEC_FAILED   CUFFT failed to execute the transform on GPU.
 CUFFT_SUCCESS       CUFFT successfully executed the FFT plan.

 JCUFFT_INTERNAL_ERROR If an internal JCufft error occurred
 

cufftExecZ2D

public static int cufftExecZ2D(cufftHandle plan,
                               double[] cIdata,
                               double[] rOdata)

Convenience method for cufftExecZ2D(cufftHandle, Pointer, Pointer). Accepts arrays for input and output data and automatically performs the host-device and device-host copies.

See Also:

cufftExecZ2D(cufftHandle, Pointer, Pointer)