Package org.apfloat.internal

Class FloatWTables

java.lang.Object

org.apfloat.internal.FloatElementaryModMath

org.apfloat.internal.FloatModMath

org.apfloat.internal.FloatWTables

public class FloatWTables
extends FloatModMath

Helper class for generating and caching tables of powers of the n:th root of unity.

Since:

1.7.0

Version:

1.9.0

Author:

Mikko Tommila

Method Summary

Modifier and Type	Method	Description
static float[]	getInverseWTable(int modulus, int length)	Get a table of inverses of powers of n:th root of unity.
static float[]	getWTable(int modulus, int length)	Get a table of powers of n:th root of unity.

Methods inherited from class org.apfloat.internal.FloatModMath

createWTable, getForwardNthRoot, getInverseNthRoot, modDivide, modInverse, modPow, negate

Methods inherited from class org.apfloat.internal.FloatElementaryModMath

getModulus, modAdd, modMultiply, modSubtract, setModulus

Methods inherited from class java.lang.Object

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

Method Detail

getWTable

public static float[] getWTable(int modulus,
                                int length)

Get a table of powers of n:th root of unity.

Parameters:

modulus - The index of the modulus to be used.

length - The length of the table to be returned, i.e. n.

Returns:

The table of powers of the n:th root of unity.

getInverseWTable

public static float[] getInverseWTable(int modulus,
                                       int length)

Get a table of inverses of powers of n:th root of unity.

Parameters:

modulus - The index of the modulus to be used.

length - The length of the table to be returned, i.e. n.

Returns:

The table of inverses of powers of the n:th root of unity.