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org.nd4j.linalg.api.ops.impl.layers.recurrent.LSTMLayerBp Maven / Gradle / Ivy
/*
* ******************************************************************************
* *
* *
* * 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.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * 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.layers.recurrent;
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.ops.DynamicCustomOp;
import org.nd4j.linalg.api.ops.impl.layers.recurrent.config.LSTMLayerConfig;
import org.nd4j.linalg.api.ops.impl.layers.recurrent.weights.LSTMLayerWeights;
import org.nd4j.shade.guava.primitives.Booleans;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
@NoArgsConstructor
public class LSTMLayerBp extends DynamicCustomOp {
@Getter
private LSTMLayerConfig configuration;
@Getter
private LSTMLayerWeights weights;
private SDVariable cLast;
private SDVariable yLast;
private SDVariable maxTSLength;
public LSTMLayerBp(@NonNull SameDiff sameDiff, @NonNull SDVariable x, SDVariable cLast, SDVariable yLast, SDVariable maxTSLength, @NonNull LSTMLayerWeights weights, @NonNull LSTMLayerConfig configuration,
SDVariable dLdh, SDVariable dLdhL, SDVariable dLdcL) {
super("lstmLayer_bp", sameDiff, wrapFilterNull(x, weights.getWeights(), weights.getRWeights(), weights.getBias(),
maxTSLength, yLast, cLast, weights.getPeepholeWeights(), dLdh, dLdhL, dLdcL));
this.configuration = configuration;
this.weights = weights;
this.cLast = cLast;
this.yLast = yLast;
this.maxTSLength = maxTSLength;
addIArgument(iArgs());
addTArgument(tArgs());
addBArgument(bArgs(weights, maxTSLength, yLast, cLast));
Preconditions.checkState(this.configuration.isRetLastH() || this.configuration.isRetLastC() || this.configuration.isRetFullSequence(),
"You have to specify at least one output you want to return. Use isRetLastC, isRetLast and isRetFullSequence methods in LSTMLayerConfig builder to specify them");
}
@Override
public List calculateOutputDataTypes(List inputDataTypes) {
DataType dt = inputDataTypes.get(1);
Preconditions.checkState(dt.isFPType(), "Input type 1 must be a floating point type, got %s", dt);
ArrayList list = new ArrayList<>();
list.add(dt); // dLdx
list.add(dt); // dLdWx
list.add(dt); // dLdWr
if (this.weights.hasBias()) {
list.add(dt);
} // dLdb
if (this.maxTSLength != null) {
list.add(dt);
} // dLdSl
if (this.yLast != null) {
list.add(dt);
} //dLdhI
if (this.cLast != null) {
list.add(dt);
} // dLdcI
if (this.weights.hasPH()) {
list.add(dt);
} // dLdWp
return list;
}
@Override
public String opName() {
return "lstmLayer_bp";
}
@Override
public Map propertiesForFunction() {
return configuration.toProperties(true, true);
}
public long[] iArgs() {
return new long[]{
configuration.getLstmdataformat().ordinal(),// INT_ARG(0)
configuration.getDirectionMode().ordinal(), // INT_ARG(1)
configuration.getGateAct().ordinal(), // INT_ARG(2)
configuration.getOutAct().ordinal(), // INT_ARG(3)
configuration.getCellAct().ordinal() // INT_ARG(4)
};
}
public double[] tArgs() {
return new double[]{this.configuration.getCellClip()}; // T_ARG(0)
}
protected boolean[] bArgs(LSTMLayerWeights weights, T maxTSLength, T yLast, T cLast) {
return new boolean[]{
weights.hasBias(), // hasBiases: B_ARG(0)
maxTSLength != null, // hasSeqLen: B_ARG(1)
yLast != null, // hasInitH: B_ARG(2)
cLast != null, // hasInitC: B_ARG(3)
weights.hasPH(), // hasPH: B_ARG(4)
configuration.isRetFullSequence(), //retFullSequence: B_ARG(5)
configuration.isRetLastH(), // retLastH: B_ARG(6)
configuration.isRetLastC() // retLastC: B_ARG(7)
};
}
@Override
public boolean isConfigProperties() {
return true;
}
@Override
public String configFieldName() {
return "configuration";
}
@Override
public int getNumOutputs() {
return Booleans.countTrue(
true,
true,
true,
weights.hasBias(),
this.maxTSLength != null,
this.yLast != null,
this.cLast != null,
weights.hasPH()
);
}
}