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@ -17,6 +17,8 @@ struct Chainable {
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virtual void set_zero_adjoint() { }
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virtual void allocate(size_t) = 0;
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virtual std::string graphviz() = 0;
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virtual const Shape& shape() = 0;
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virtual DataType &val() = 0;
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@ -50,6 +50,18 @@ class ExpressionGraph {
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v->forward();
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}
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std::string graphviz() {
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std::stringstream ss;
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ss << "digraph ExpressionGraph {" << std::endl;
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ss << "rankdir=BT" << std::endl;
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typedef typename ChainableStack::reverse_iterator It;
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for(It it = stack_->rbegin(); it != stack_->rend(); ++it)
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ss << (*it)->graphviz();
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ss << "}" << std::endl;
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return ss.str();
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}
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void backward() {
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for(auto&& v : *stack_)
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v->set_zero_adjoint();
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@ -22,6 +22,13 @@ struct InputNode : public Node {
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void forward() {}
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void backward() {}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"parallelogram\", label=\"input\", style=\"filled\", fillcolor=\"lawngreen\"]" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct ConstantNode : public Node {
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@ -35,6 +42,13 @@ struct ConstantNode : public Node {
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void forward() {}
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void backward() {}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"diamond\", label=\"const\"]" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct ParamNode : public Node {
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@ -60,6 +74,13 @@ struct ParamNode : public Node {
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}
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"hexagon\", label=\"param\", style=\"filled\", fillcolor=\"orangered\"]" << std::endl << std::endl;
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return ss.str();
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};
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private:
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std::function<void(Tensor)> init_;
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bool initialized_;
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@ -89,6 +110,14 @@ struct LogitNodeOp : public UnaryNodeOp {
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Element(_1 += _2 * _3 * (1 - _3),
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a_->grad(), adj_, val_);
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"logit\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct TanhNodeOp : public UnaryNodeOp {
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@ -105,6 +134,14 @@ struct TanhNodeOp : public UnaryNodeOp {
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Element(_1 += _2 * (1 - _3 * _3),
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a_->grad(), adj_, val_);
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"tanh\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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// @TODO, make this numerically safe(r):
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@ -131,6 +168,14 @@ struct SoftmaxNodeOp : public UnaryNodeOp {
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SubtractMean(&result, val_);
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Element(_1 += _2 * _3, a_->grad(), val_, result);
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"softmax\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct LogNodeOp : public UnaryNodeOp {
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@ -146,6 +191,14 @@ struct LogNodeOp : public UnaryNodeOp {
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Element(_1 += _2 * 1.f / _3,
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a_->grad(), adj_, a_->val());
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"log\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct ExpNodeOp : public UnaryNodeOp {
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@ -161,6 +214,14 @@ struct ExpNodeOp : public UnaryNodeOp {
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Element(_1 += _2 * Exp(_3),
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a_->grad(), adj_, a_->val());
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"exp\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct NegNodeOp : public UnaryNodeOp {
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@ -175,6 +236,14 @@ struct NegNodeOp : public UnaryNodeOp {
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void backward() {
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Element(_1 += -_2, a_->grad(), adj_);
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"-\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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/******************************************************/
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@ -220,6 +289,15 @@ struct DotNodeOp : public BinaryNodeOp {
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Prod(a_->grad(), adj_, b_->val(), false, true, 1.0);
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Prod(b_->grad(), a_->val(), adj_, true, false, 1.0);
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"×\", style=\"filled\", fillcolor=\"orange\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl;
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ss << "\"" << &*b_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct PlusNodeOp : public BinaryNodeOp {
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@ -238,6 +316,15 @@ struct PlusNodeOp : public BinaryNodeOp {
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Element(_1 += _2,
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b_->grad(), adj_);
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"+\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl;
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ss << "\"" << &*b_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct MinusNodeOp : public BinaryNodeOp {
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@ -256,6 +343,15 @@ struct MinusNodeOp : public BinaryNodeOp {
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Element(_1 -= _2,
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b_->grad(), adj_);
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"-\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl;
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ss << "\"" << &*b_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct MultNodeOp : public BinaryNodeOp {
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@ -274,6 +370,15 @@ struct MultNodeOp : public BinaryNodeOp {
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Element(_1 += _2 * _3,
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b_->grad(), adj_, a_->val());
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"•\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << &*a_ << "\" -> \"" << this << "\"" << std::endl;
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ss << "\"" << &*b_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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struct DivNodeOp : public BinaryNodeOp {
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@ -291,7 +396,16 @@ struct DivNodeOp : public BinaryNodeOp {
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a_->grad(), adj_, b_->val());
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Element(_1 -= _2 * _3 / (_4 * _4),
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b_->grad(), adj_, a_->val(), b_->val());
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}
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}
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virtual std::string graphviz() {
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std::stringstream ss;
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ss << "\"" << this << "\" [shape=\"box\", label=\"÷\", style=\"filled\", fillcolor=\"yellow\"]" << std::endl;
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ss << "\"" << a_ << "\" -> \"" << this << "\"" << std::endl;
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ss << "\"" << b_ << "\" -> \"" << this << "\"" << std::endl << std::endl;
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return ss.str();
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};
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};
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}
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@ -75,6 +75,8 @@ int main(int argc, char** argv) {
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Y[t] = Yt;
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}
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std::cout << g.graphviz() << std::endl;
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g.forward(batch_size);
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g.backward();
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@ -47,7 +47,7 @@ ExpressionGraph build_graph() {
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int main(int argc, char** argv) {
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cudaSetDevice(1);
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cudaSetDevice(0);
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std::cerr << "Loading test set...";
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std::vector<float> testImages = datasets::mnist::ReadImages("../examples/mnist/t10k-images-idx3-ubyte", BATCH_SIZE, IMAGE_SIZE);
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@ -62,6 +62,8 @@ int main(int argc, char** argv) {
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g["x"] = (xt << testImages);
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g["y"] = (yt << testLabels);
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std::cout << g.graphviz() << std::endl;
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g.forward(BATCH_SIZE);
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std::vector<float> results;
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