org.nd4j.linalg.api.ops.impl.transforms.segment.bp.SegmentProdBp Maven / Gradle / Ivy
/*******************************************************************************
* 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.segment.bp;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.base.Preconditions;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* Segment product backprop operation
*
* @author Alex Black
*/
public class SegmentProdBp extends DynamicCustomOp {
public SegmentProdBp(SameDiff sameDiff, SDVariable data, SDVariable segmentIds, SDVariable gradient) {
super(null, sameDiff, new SDVariable[] {data, segmentIds, gradient}, false);
}
public SegmentProdBp(){ }
@Override
public String opName(){
return "segment_prod_bp";
}
@Override
public List calculateOutputDataTypes(List inputDataTypes){
Preconditions.checkState(inputDataTypes != null && inputDataTypes.size() == 3, "Expected exactly 3 input data types for %s, got %s", getClass(), inputDataTypes);
return Arrays.asList(inputDataTypes.get(0), inputDataTypes.get(1));
}
}