Examples with Operator gov.sandia.n2a.language.Operator used on opensource projects

Example 86 with Operator

use of gov.sandia.n2a.language.Operator in project n2a by frothga.

the class Signum method determineExponent.

public void determineExponent(ExponentContext context) {
    Operator op = operands[0];
    op.determineExponent(context);
    int centerNew = MSB / 2;
    int exponentNew = MSB - centerNew;
    updateExponent(context, exponentNew, centerNew);
}

Example 87 with Operator

use of gov.sandia.n2a.language.Operator in project n2a by frothga.

the class Signum method determineExponentNext.

public void determineExponentNext() {
    Operator op = operands[0];
    op.exponentNext = op.exponent;
    op.determineExponentNext();
}

Example 88 with Operator

use of gov.sandia.n2a.language.Operator in project n2a by frothga.

the class Sphere method determineExponent.

public void determineExponent(ExponentContext context) {
    if (operands.length > 0) {
        Operator op = operands[0];
        op.determineExponent(context);
        if (op.exponent != UNKNOWN) {
            updateExponent(context, op.exponent, op.center);
        }
    } else {
        // Current implementation never quite reaches 1, only [0,1).
        updateExponent(context, -1, MSB);
    }
}

Example 89 with Operator

use of gov.sandia.n2a.language.Operator in project n2a by frothga.

the class Sphere method simplify.

public Operator simplify(Variable from, boolean evalOnly) {
    if (operands.length == 0) {
        // No need to set from.changed
        operands = new Operator[1];
        Operator sigma = new Constant(new MatrixDense(3, 1, 1));
        sigma.parent = this;
        operands[0] = sigma;
        return this;
    }
    // Any number of operands >= 1. We only pay attention to first operand.
    operands[0] = operands[0].simplify(from, evalOnly);
    Operator sigma = operands[0];
    if (sigma.isScalar()) {
        if (sigma.getDouble() == 0) {
            // Needed because we are replacing ourself with a simpler constant.
            from.changed = true;
            sigma.parent = parent;
            return sigma;
        }
        // No need to set from.changed
        operands = new Operator[1];
        sigma = new Constant(new MatrixDense(3, 1, sigma.getDouble()));
        sigma.parent = this;
        operands[0] = sigma;
        return this;
    } else if (sigma instanceof Constant) {
        Constant cs = (Constant) sigma;
        if (cs.value instanceof Matrix) {
            // No need to set from.changed for any of the transforms below ...
            Matrix A = (Matrix) cs.value;
            int rows = A.rows();
            int cols = A.columns();
            if (rows == 1 && cols > 1) {
                cs.value = A = A.transpose();
                rows = cols;
                cols = 1;
            }
            if (// Check for zeroes in single column.
            cols == 1) {
                int rank = (int) A.norm(0);
                if (rank < rows) {
                    from.changed = true;
                    MatrixDense B = new MatrixDense(rows, rank);
                    cs.value = B;
                    int c = 0;
                    for (int r = 0; r < rows; r++) {
                        double value = A.get(r);
                        if (value != 0)
                            B.set(r, c++, value);
                    }
                }
            }
        // Don't bother checking for columns that are all zeroes.
        // Since sigma is a constant, this should be obvious to the user.
        }
    }
    return this;
}

Example 90 with Operator

use of gov.sandia.n2a.language.Operator in project n2a by frothga.

the class SquareRoot method determineExponentNext.

public void determineExponentNext() {
    Operator op = operands[0];
    op.exponentNext = op.exponent;
    op.determineExponentNext();
}