jcuda.jcufft

Class cufftCompatibility

java.lang.Object

jcuda.jcufft.cufftCompatibility

public class cufftCompatibility
extends Object

Compatibility flags for CUFFT. Original documentation:

Certain R2C and C2R transforms go much more slowly when FFTW memory layout and behaviour is required. The default is "best performance", which means not-compatible-with-fftw. Use the cufftSetCompatibilityMode API to enable exact FFTW-like behaviour.

These flags can be ORed together to select precise FFTW compatibility behaviour.

Field Summary

Fields

Modifier and Type	Field and Description
static int	CUFFT_COMPATIBILITY_FFTW_ALL Deprecated. as of CUDA 8.0.27
static int	CUFFT_COMPATIBILITY_FFTW_ASYMMETRIC Deprecated. as of CUDA 6.5: Asymmetric input is always treated as in FFTW.
static int	CUFFT_COMPATIBILITY_FFTW_PADDING Inserts extra padding between packed in-place transforms for batched transforms with power-of-2 size.
static int	CUFFT_COMPATIBILITY_NATIVE Deprecated. as of CUDA 6.0RC

Method Summary

Modifier and Type	Method and Description
static String	stringFor(int m) Returns the String identifying the given cufftCompatibility

Methods inherited from class java.lang.Object

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

Field Detail

CUFFT_COMPATIBILITY_NATIVE

public static final int CUFFT_COMPATIBILITY_NATIVE

Deprecated. as of CUDA 6.0RC

Disable any FFTW compatibility mode.

See Also:

Constant Field Values

CUFFT_COMPATIBILITY_FFTW_PADDING

public static final int CUFFT_COMPATIBILITY_FFTW_PADDING

Inserts extra padding between packed in-place transforms for batched transforms with power-of-2 size. This is the default.

See Also:

Constant Field Values

CUFFT_COMPATIBILITY_FFTW_ASYMMETRIC

public static final int CUFFT_COMPATIBILITY_FFTW_ASYMMETRIC

Deprecated. as of CUDA 6.5: Asymmetric input is always treated as in FFTW.

Guarantees FFTW-compatible output for non-symmetric complex inputs for transforms with power-of-2 size. This is only useful for artificial (i.e. random) datasets as actual data will always be symmetric if it has come from the real plane. If you don't understand what this means, you probably don't have to use it.

See Also:

Constant Field Values

CUFFT_COMPATIBILITY_FFTW_ALL

public static final int CUFFT_COMPATIBILITY_FFTW_ALL

Deprecated. as of CUDA 8.0.27

For convenience, enables all FFTW compatibility modes at once.

See Also:

Constant Field Values

Method Detail

stringFor

public static String stringFor(int m)

Returns the String identifying the given cufftCompatibility

Parameters:

m - The cufftType

Returns:

The String identifying the given cufftCompatibility