org.nd4j.linalg.activations.impl.ActivationGELU Maven / Gradle / Ivy
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* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
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* * SPDX-License-Identifier: Apache-2.0
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package org.nd4j.linalg.activations.impl;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import org.nd4j.linalg.activations.BaseActivationFunction;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.impl.transforms.strict.GELU;
import org.nd4j.linalg.api.ops.impl.transforms.strict.GELUDerivative;
import org.nd4j.linalg.api.ops.impl.transforms.strict.PreciseGELU;
import org.nd4j.linalg.api.ops.impl.transforms.strict.PreciseGELUDerivative;
import org.nd4j.linalg.factory.Nd4j;
import org.nd4j.common.primitives.Pair;
@EqualsAndHashCode(callSuper = false)
@Getter
public class ActivationGELU extends BaseActivationFunction {
private boolean precise;
public ActivationGELU(boolean precise){
this.precise = precise;
}
public ActivationGELU(){
this(false);
}
@Override
public INDArray getActivation(INDArray in, boolean training) {
if (precise)
Nd4j.getExecutioner().execAndReturn(new PreciseGELU(in, in));
else
Nd4j.getExecutioner().execAndReturn(new GELU(in, in));
return in;
}
@Override
public Pair backprop(INDArray in, INDArray epsilon) {
assertShape(in, epsilon);
INDArray dLdz;
if (precise)
dLdz = Nd4j.getExecutioner().exec(new PreciseGELUDerivative(in, in));
else
dLdz = Nd4j.getExecutioner().exec(new GELUDerivative(in, in));
dLdz.muli(epsilon);
return new Pair<>(dLdz, null);
}
@Override
public String toString() {
return "gelu(precise="+precise+")";
}
}