Bausager
7fe6be9ba7
Sync public mirror / sync (push) Successful in 27s
Made the backwards for dense layers and ReLU, but I think I soon need to refactor some code to make it all steamlined.
41 lines
936 B
C++
41 lines
936 B
C++
#pragma once
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#include "./core/omp_config.h"
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#include "./utils/vector.h"
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#include "./utils/matrix.h"
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namespace neural_networks{
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template <typename T>
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struct Activation_ReLU{
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utils::Matrix<T> _inputs;
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utils::Matrix<T> outputs;
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utils::Matrix<T> dinputs;
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void forward(const utils::Matrix<T>& inputs){
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_inputs = inputs;
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outputs = numerics::matclip_low(inputs, T{0});
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}
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void backward(const utils::Matrix<T>& dvalues){
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// Since we need to modify the original variable,
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// let's make a copy of the values first
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dinputs = dvalues;
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// Zero gradients where input values were negative
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for (uint64_t i = 0; i < dinputs.rows(); ++i){
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for (uint64_t j = 0; j < dinputs.cols(); ++j){
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if (_inputs(i,j) <= T{0}){
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dinputs(i,j) = T{0};
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}
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}
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}
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}
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};
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} // end namespace neural_networks
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