public class DoubleFactor3SixStepNTTStrategy extends DoubleParallelFNTStrategy
parallelRunner
Constructor and Description |
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DoubleFactor3SixStepNTTStrategy(DoubleSixStepFNTStrategy factor2Strategy)
Creates a new factor-3 transform strategy on top of a six-step transform.
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Modifier and Type | Method and Description |
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long |
getTransformLength(long size)
Return the supported transform length for the specified data size.
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void |
inverseTransform(DataStorage dataStorage,
int modulus,
long totalTransformLength)
Perform an inverse transform on the data.
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void |
setParallelRunner(ParallelRunner parallelRunner)
Set the parallel runner to be used when executing the transform.
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void |
transform(DataStorage dataStorage,
int modulus)
Perform a forward transform on the data.
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multiplyElements, transformRows
inverseTableFNT, tableFNT
createWTable, getForwardNthRoot, getInverseNthRoot, modDivide, modInverse, modPow, negate
getModulus, modAdd, modMultiply, modSubtract, setModulus
public DoubleFactor3SixStepNTTStrategy(DoubleSixStepFNTStrategy factor2Strategy)
factor2Strategy
- The underlying transformation strategy, that can be capable of only doing radix-2 transforms.public void setParallelRunner(ParallelRunner parallelRunner)
ParallelNTTStrategy
setParallelRunner
in interface ParallelNTTStrategy
setParallelRunner
in class DoubleParallelFNTStrategy
parallelRunner
- The parallel runner.public void transform(DataStorage dataStorage, int modulus) throws ApfloatRuntimeException
NTTStrategy
Multiple moduli can be used, if the convolution algorithm uses the Chinese Remainder Theorem to calculate the final result.
transform
in interface NTTStrategy
transform
in class DoubleTableFNTStrategy
dataStorage
- The data to be transformed.modulus
- Number of modulus to use (in case the transform supports multiple moduli).ApfloatRuntimeException
public void inverseTransform(DataStorage dataStorage, int modulus, long totalTransformLength) throws ApfloatRuntimeException
NTTStrategy
Multiple moduli can be used, if the convolution algorithm uses the Chinese Remainder Theorem to calculate the final result.
inverseTransform
in interface NTTStrategy
inverseTransform
in class DoubleTableFNTStrategy
dataStorage
- The data to be transformed.modulus
- Number of modulus to use (in case the transform supports multiple moduli).totalTransformLength
- Total transform length; the final result elements are divided by this value.ApfloatRuntimeException
public long getTransformLength(long size)
NTTStrategy
getTransformLength
in interface NTTStrategy
getTransformLength
in class DoubleTableFNTStrategy
size
- Length of the data to be transformed.Copyright © 2011. All Rights Reserved.