Examples with DivideAndConquer org.ojalgo.concurrent.DivideAndConquer used on opensource projects

Example 46 with DivideAndConquer

use of org.ojalgo.concurrent.DivideAndConquer in project ojAlgo by optimatika.

the class HouseholderHermitian method invoke.

public static void invoke(final ComplexNumber[] data, final Householder.Complex householder, final ComplexNumber[] worker) {
    final ComplexNumber[] tmpVector = householder.vector;
    final int tmpFirst = householder.first;
    final int tmpLength = tmpVector.length;
    final ComplexNumber tmpBeta = householder.beta;
    final int tmpCount = tmpLength - tmpFirst;
    if (tmpCount > MultiplyHermitianAndVector.THRESHOLD) {
        final DivideAndConquer tmpConqurer = new DivideAndConquer() {

            @Override
            protected void conquer(final int first, final int limit) {
                MultiplyHermitianAndVector.invoke(worker, first, limit, data, tmpVector, tmpFirst, ComplexNumber.FACTORY);
            }
        };
        tmpConqurer.invoke(tmpFirst, tmpLength, MultiplyHermitianAndVector.THRESHOLD);
    } else {
        MultiplyHermitianAndVector.invoke(worker, tmpFirst, tmpLength, data, tmpVector, tmpFirst, ComplexNumber.FACTORY);
    }
    ComplexNumber tmpVal = ComplexNumber.ZERO;
    for (int c = tmpFirst; c < tmpLength; c++) {
        // tmpVal += tmpVector[c] * worker[c];
        tmpVal = tmpVal.add(tmpVector[c].conjugate().multiply(worker[c]));
    }
    // tmpVal *= (tmpBeta / TWO);
    tmpVal = ComplexFunction.DIVIDE.invoke(tmpVal.multiply(tmpBeta), ComplexNumber.TWO);
    for (int c = tmpFirst; c < tmpLength; c++) {
        // worker[c] = tmpBeta * (worker[c] - (tmpVal * tmpVector[c]));
        worker[c] = tmpBeta.multiply(worker[c].subtract(tmpVal.multiply(tmpVector[c])));
    }
    if (tmpCount > HermitianRank2Update.THRESHOLD) {
        final DivideAndConquer tmpConqurer = new DivideAndConquer() {

            @Override
            protected void conquer(final int first, final int limit) {
                HermitianRank2Update.invoke(data, first, limit, tmpVector, worker);
            }
        };
        tmpConqurer.invoke(tmpFirst, tmpLength, HermitianRank2Update.THRESHOLD);
    } else {
        HermitianRank2Update.invoke(data, tmpFirst, tmpLength, tmpVector, worker);
    }
}