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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.tensor.impl;
import com.yahoo.tensor.TensorAddress;
import static java.lang.Math.abs;
/**
* 4 dimensional address
* @author baldersheim
*/
final class TensorAddressAny4 extends TensorAddressAny {
private final int label0, label1, label2, label3;
TensorAddressAny4(int label0, int label1, int label2, int label3) {
this.label0 = label0;
this.label1 = label1;
this.label2 = label2;
this.label3 = label3;
}
@Override public int size() { return 4; }
@Override
public long numericLabel(int i) {
return switch (i) {
case 0 -> label0;
case 1 -> label1;
case 2 -> label2;
case 3 -> label3;
default -> throw new IndexOutOfBoundsException("Index is not in [0,3]: " + i);
};
}
@Override
public TensorAddress withLabel(int labelIndex, long label) {
return switch (labelIndex) {
case 0 -> new TensorAddressAny4(Convert.safe2Int(label), label1, label2, label3);
case 1 -> new TensorAddressAny4(label0, Convert.safe2Int(label), label2, label3);
case 2 -> new TensorAddressAny4(label0, label1, Convert.safe2Int(label), label3);
case 3 -> new TensorAddressAny4(label0, label1, label2, Convert.safe2Int(label));
default -> throw new IllegalArgumentException("No label " + labelIndex);
};
}
@Override
public int hashCode() {
return abs(label0) |
(abs(label1) << (1*32 - Integer.numberOfLeadingZeros(abs(label0)))) |
(abs(label2) << (2*32 - (Integer.numberOfLeadingZeros(abs(label0)) + Integer.numberOfLeadingZeros(abs(label1))))) |
(abs(label3) << (3*32 - (Integer.numberOfLeadingZeros(abs(label0)) + Integer.numberOfLeadingZeros(abs(label1)) + Integer.numberOfLeadingZeros(abs(label1)))));
}
@Override
public boolean equals(Object o) {
return (o instanceof TensorAddressAny4 any) &&
(label0 == any.label0) &&
(label1 == any.label1) &&
(label2 == any.label2) &&
(label3 == any.label3);
}
}
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