org.nd4j.linalg.api.ops.impl.transforms.gradient.PReluBp Maven / Gradle / Ivy
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* * terms of the Apache License, Version 2.0 which is available at
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* * information regarding copyright ownership.
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* * SPDX-License-Identifier: Apache-2.0
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package org.nd4j.linalg.api.ops.impl.transforms.gradient;
import java.util.Arrays;
import java.util.List;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.NonNull;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.common.base.Preconditions;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
@NoArgsConstructor
public class PReluBp extends DynamicCustomOp {
@Getter
protected int[] sharedAxes;
public PReluBp(SameDiff sd, SDVariable input, SDVariable alpha, SDVariable gradient, int... sharedAxes){
super(sd, new SDVariable[]{input, alpha, gradient});
this.sharedAxes = sharedAxes;
addIArgument(sharedAxes);
}
public PReluBp(@NonNull INDArray input, @NonNull INDArray alpha, @NonNull INDArray gradient, INDArray dLdI, INDArray dLdA, int... sharedAxes){
super(new INDArray[]{input, alpha, gradient}, wrapFilterNull(dLdI, dLdA));
this.sharedAxes = sharedAxes;
addIArgument(sharedAxes);
}
@Override
public String opName(){
return "prelu_bp";
}
@Override
public List calculateOutputDataTypes(List dataTypes) {
Preconditions
.checkArgument(dataTypes != null && dataTypes.size() == 3, "Expected exactly 3 input datatypes, got %s", dataTypes);
Preconditions.checkArgument(dataTypes.get(0).isFPType() && dataTypes.get(1).isFPType() && dataTypes.get(2).isFPType(), "Input datatypes must be floating point, got %s", dataTypes);
return Arrays.asList(dataTypes.get(0), dataTypes.get(1));
}
@Override
public List doDiff(List f1) {
throw new UnsupportedOperationException("Not supported");
}
}