org.apfloat.internal
Class LongMatrix

java.lang.Object
  org.apfloat.internal.LongMatrix

public class LongMatrix
extends Object

Optimized matrix transposition methods for the long type.

Version:

1.0

Author:

Mikko Tommila

Method Summary

static void	transpose(ArrayAccess arrayAccess, int n1, int n2) Transpose a n1 x n2 matrix.
static void	transposeSquare(ArrayAccess arrayAccess, int n1, int n2) Transpose a square n1 x n1 block of n1 x n2 matrix.

Methods inherited from class java.lang.Object

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

Method Detail

transpose

public static void transpose(ArrayAccess arrayAccess,
                             int n1,
                             int n2)
                      throws ApfloatRuntimeException

Transpose a n₁ x n₂ matrix.

Both n₁ and n₂ must be powers of two. Additionally, one of these must be true:

n₁ = n₂
n₁ = 2*n₂
n₂ = 2*n₁

Parameters:

arrayAccess - Accessor to the matrix data. This data will be transposed.

n1 - Number of rows in the matrix.

n2 - Number of columns in the matrix.

Throws:

ApfloatRuntimeException

transposeSquare

public static void transposeSquare(ArrayAccess arrayAccess,
                                   int n1,
                                   int n2)
                            throws ApfloatRuntimeException

Transpose a square n₁ x n₁ block of n₁ x n₂ matrix.

Both n₁ and n₂ must be powers of two, and n₁ <= n₂.

Parameters:

arrayAccess - Accessor to the matrix data. This data will be transposed.

n1 - Number of rows and columns in the block to be transposed.

n2 - Number of columns in the matrix.

Throws:

ApfloatRuntimeException