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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.tensor.functions;
import com.yahoo.tensor.TensorType;
import com.yahoo.tensor.evaluation.Name;
import java.util.List;
import java.util.Objects;
/**
* @author bratseth
*/
public class Matmul<NAMETYPE extends Name> extends CompositeTensorFunction<NAMETYPE> {
private final TensorFunction<NAMETYPE> argument1, argument2;
private final String dimension;
public Matmul(TensorFunction<NAMETYPE> argument1, TensorFunction<NAMETYPE> argument2, String dimension) {
this.argument1 = argument1;
this.argument2 = argument2;
this.dimension = dimension;
}
public static TensorType outputType(TensorType a, TensorType b, String dimension) {
return Join.outputType(a, b);
}
@Override
public List<TensorFunction<NAMETYPE>> arguments() { return List.of(argument1, argument2); }
@Override
public TensorFunction<NAMETYPE> withArguments(List<TensorFunction<NAMETYPE>> arguments) {
if ( arguments.size() != 2)
throw new IllegalArgumentException("Matmul must have 2 arguments, got " + arguments.size());
return new Matmul<>(arguments.get(0), arguments.get(1), dimension);
}
@Override
public PrimitiveTensorFunction<NAMETYPE> toPrimitive() {
TensorFunction<NAMETYPE> primitiveArgument1 = argument1.toPrimitive();
TensorFunction<NAMETYPE> primitiveArgument2 = argument2.toPrimitive();
return new Reduce<>(new Join<>(primitiveArgument1, primitiveArgument2, ScalarFunctions.multiply()),
Reduce.Aggregator.sum,
dimension);
}
@Override
public String toString(ToStringContext<NAMETYPE> context) {
return "matmul(" + argument1.toString(context) + ", " + argument2.toString(context) + ", " + dimension + ")";
}
@Override
public int hashCode() { return Objects.hash("matmul", argument1, argument2, dimension); }
}
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