1 files changed, 62 insertions, 0 deletions
diff --git a/vespajlib/src/main/java/com/yahoo/tensor/impl/TensorAddressAny4.java b/vespajlib/src/main/java/com/yahoo/tensor/impl/TensorAddressAny4.java
new file mode 100644
index 00000000000..8a45483340e
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/tensor/impl/TensorAddressAny4.java
@@ -0,0 +1,62 @@
+// 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);
+    }
+}