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org.nd4j.linalg.api.ops.impl.transforms.custom.LayerNorm 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.transforms.custom;
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.imports.NoOpNameFoundException;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import org.nd4j.shade.guava.primitives.Ints;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@NoArgsConstructor
public class LayerNorm extends DynamicCustomOp {
private boolean noBias = false;
private boolean channelsFirst;
public LayerNorm(@NonNull SameDiff sameDiff, @NonNull SDVariable input, @NonNull SDVariable gain, SDVariable bias, boolean channelsFirst, int... dimensions) {
super(null, sameDiff, wrapFilterNull(input, gain, bias), false);
this.noBias = bias == null;
this.channelsFirst = channelsFirst;
setDimensions(dimensions);
}
public LayerNorm(SameDiff sameDiff, SDVariable input, SDVariable gain, boolean channelsFirst, int... dimensions) {
this(sameDiff, input, gain, null, channelsFirst, dimensions);
}
public LayerNorm(INDArray input, INDArray gain, INDArray bias, INDArray result, boolean channelsFirst, int... dimensions) {
super("layer_norm", wrapFilterNull(input, gain, bias), wrapOrNull(result));
this.noBias = bias == null;
this.channelsFirst = channelsFirst;
setDimensions(dimensions);
}
public LayerNorm(@NonNull INDArray input, @NonNull INDArray gain, boolean channelsFirst, int... dimensions) {
this(input, gain, null, channelsFirst, dimensions);
}
public LayerNorm(INDArray input, INDArray gain, INDArray result, boolean channelsFirst, int... dimensions) {
this(input, gain, null, result, channelsFirst, dimensions);
}
@Override
public void setDimensions(int[] dimensions) {
Preconditions.checkArgument(dimensions != null, "LayerNorm: You have to provide dimensions");
Preconditions.checkArgument(dimensions.length > 0, "LayerNorm: You have to provide dimensions");
this.dimensions = dimensions;
this.iArguments.clear();
addIArgument(dimensions);
this.bArguments.clear();
this.bArguments.add(channelsFirst);
}
@Override
public void addBArgument(boolean... arg) {
super.addBArgument(arg);
}
@Override
public Map propertiesForFunction() {
Map ret = new HashMap<>();
ret.put("noBias",noBias);
ret.put("channelsFirst",channelsFirst);
if(dimensions != null)
ret.put("dimensions",dimensions);
return ret;
}
@Override
public void configureFromArguments() {
if(!bArguments.isEmpty() && bArguments.size() > 1) {
this.noBias = bArguments.get(1);
}
if(!bArguments.isEmpty()) {
this.channelsFirst = bArguments.get(0);
}
if(!iArguments.isEmpty()) {
this.dimensions = Ints.toArray(iArguments);
}
}
@Override
public void setPropertiesForFunction(Map properties) {
Boolean noBias = getBooleanFromProperty("noBias",properties);
if(noBias != null) {
this.noBias = noBias;
}
Boolean channelsFirst = getBooleanFromProperty("channelsFirst",properties);
if(channelsFirst != null) {
this.channelsFirst = channelsFirst;
}
if(properties.containsKey("dimensions") && properties.get("dimensions") instanceof Long) {
Long dimension = (Long) properties.get("dimensions");
this.dimensions = new int[]{dimension.intValue()};
} else if(properties.containsKey("dimensions") && properties.get("dimensions") instanceof int[]) {
int[] dimensions = (int[]) properties.get("dimensions");
this.dimensions = dimensions;
}
}
@Override
public String opName() {
return "layer_norm";
}
@Override
public String tensorflowName() {
throw new NoOpNameFoundException("No tensorflow name found for shape " + opName());
}
@Override
public String onnxName() {
throw new NoOpNameFoundException("No onnx name found for shape " + opName());
}
@Override
public List doDiff(List gradient) {
if (noBias) {
return new LayerNormBp(sameDiff, arg(0), arg(1), gradient.get(0), channelsFirst, dimensions).outputs();
} else {
return new LayerNormBp(sameDiff, arg(0), arg(1), arg(2), gradient.get(0), channelsFirst, dimensions).outputs();
}
}
@Override
public List calculateOutputDataTypes(List dataTypes) {
Preconditions.checkState(dataTypes != null && dataTypes.size() >= 2 && dataTypes.size() <= 3, "Expected exactly 2 or 3 input datatypes, got %s", dataTypes);
DataType first = dataTypes.get(0);
for (DataType dataType : dataTypes) {
Preconditions.checkState(dataType.isFPType(), "Input %s datatype must be a floating point type, got datypes %s", dataTypes);
Preconditions.checkState(first == dataType, "All datatypes must be same type, got input datatypes %s", dataTypes);
}
return Collections.singletonList(first);
}
@Override
public int numOutputArguments() {
return noBias ? 2 : 3;
}
}