Package org.apfloat.aparapi
Class IntAparapiNTTStepStrategy
- java.lang.Object
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- org.apfloat.internal.IntElementaryModMath
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- org.apfloat.internal.IntModMath
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- org.apfloat.internal.IntTableFNT
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- org.apfloat.internal.IntNTTStepStrategy
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- org.apfloat.aparapi.IntAparapiNTTStepStrategy
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- All Implemented Interfaces:
Parallelizable
,NTTStepStrategy
public class IntAparapiNTTStepStrategy extends IntNTTStepStrategy
NTT steps for theint
element type aparapi transforms.- Since:
- 1.8.3
- Version:
- 1.8.3
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Constructor Summary
Constructors Constructor Description IntAparapiNTTStepStrategy()
Default constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
multiplyElements(ArrayAccess arrayAccess, int startRow, int startColumn, int rows, int columns, long length, long totalTransformLength, boolean isInverse, int modulus)
Multiply each matrix element(i, j)
bywi * j / totalTransformLength
.void
transformRows(ArrayAccess arrayAccess, int length, int count, boolean isInverse, boolean permute, int modulus)
Transform the columns of the data matrix.-
Methods inherited from class org.apfloat.internal.IntNTTStepStrategy
createMultiplyElementsParallelRunnable, createTransformRowsParallelRunnable, getMaxTransformLength
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Methods inherited from class org.apfloat.internal.IntTableFNT
inverseTableFNT, tableFNT
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Methods inherited from class org.apfloat.internal.IntModMath
createWTable, getForwardNthRoot, getInverseNthRoot, modDivide, modInverse, modPow, negate
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Methods inherited from class org.apfloat.internal.IntElementaryModMath
getModulus, modAdd, modMultiply, modSubtract, setModulus
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Method Detail
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multiplyElements
public void multiplyElements(ArrayAccess arrayAccess, int startRow, int startColumn, int rows, int columns, long length, long totalTransformLength, boolean isInverse, int modulus) throws ApfloatRuntimeException
Description copied from interface:NTTStepStrategy
Multiply each matrix element(i, j)
bywi * j / totalTransformLength
. The matrix size is n1 x n2.- Specified by:
multiplyElements
in interfaceNTTStepStrategy
- Overrides:
multiplyElements
in classIntNTTStepStrategy
- Parameters:
arrayAccess
- The memory array to multiply.startRow
- Which row in the whole matrix the starting row in thearrayAccess
is.startColumn
- Which column in the whole matrix the starting column in thearrayAccess
is.rows
- The number of rows in thearrayAccess
to multiply.columns
- The number of columns in the matrix (= n2).length
- The length of data in the matrix being transformed.totalTransformLength
- The total transform length, for the scaling factor. Used only for the inverse case.isInverse
- If the multiplication is done for the inverse transform or not.modulus
- Index of the modulus.- Throws:
ApfloatRuntimeException
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transformRows
public void transformRows(ArrayAccess arrayAccess, int length, int count, boolean isInverse, boolean permute, int modulus) throws ApfloatRuntimeException
Transform the columns of the data matrix. Note that this method expects the data to be organized in columns, not rows. The argumentslength
andcount
still mean the length of one transform and number of transforms to be done.- Specified by:
transformRows
in interfaceNTTStepStrategy
- Overrides:
transformRows
in classIntNTTStepStrategy
- Parameters:
arrayAccess
- The memory array to split to columns and to transform.length
- Length of one transform (one columns).count
- Number of columns.isInverse
-true
if an inverse transform is performed,false
if a forward transform is performed.permute
- If permutation should be done.modulus
- Index of the modulus.- Throws:
ApfloatRuntimeException
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