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/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.api.ops.impl.transforms.arithmetic;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.imports.NoOpNameFoundException;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseTransformOp;
import java.util.ArrayList;
import java.util.List;
/**
* Division operation
*
* @author Adam Gibson
*/
public class OldSubOp extends BaseTransformOp {
public OldSubOp(SameDiff sameDiff, SDVariable i_v1, SDVariable i_v2) {
super(sameDiff, i_v1, i_v2);
}
public OldSubOp(SameDiff sameDiff, SDVariable i_v1, SDVariable i_v2, boolean inPlace) {
super(sameDiff, i_v1, i_v2, inPlace);
}
public OldSubOp() {}
public OldSubOp(INDArray x, INDArray y, INDArray z, long n) {
super(x, y, z, n);
}
public OldSubOp(INDArray x) {
super(x);
}
public OldSubOp(INDArray x, INDArray z) {
super(x, z);
}
public OldSubOp(INDArray x, INDArray z, long n) {
super(x, z, n);
}
public OldSubOp(INDArray x, INDArray y, INDArray z) {
super(x, y, z, x.lengthLong());
}
@Override
public int opNum() {
return 9;
}
@Override
public String opName() {
return "old_sub";
}
@Override
public String onnxName() {
throw new NoOpNameFoundException("No onnx op opName found for " + opName());
}
@Override
public String tensorflowName() {
throw new NoOpNameFoundException("No tensorflow op opName found for " + opName());
}
@Override
public void init(INDArray x, INDArray y, INDArray z, long n) {
super.init(x, y, z, n);
if (y == null)
throw new IllegalArgumentException("No components to divide");
}
@Override
public List doDiff(List i_v) {
SDVariable gradWrtX = f().div(i_v.get(0),rarg());
SDVariable gradWrtY = f().mul(f().neg(gradWrtX),f().div(larg(),rarg()));
List ret = new ArrayList<>(2);
ret.add(gradWrtX);
ret.add(gradWrtY);
return ret;
}
}