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#pragma once
#include "caffe2/core/operator.h"
namespace caffe2 {
template <typename T>
struct GFtrlParams {
explicit GFtrlParams(OperatorBase* op)
: alphaInv(1.0 / op->GetSingleArgument<float>("alpha", 0.005f)),
beta(op->GetSingleArgument<float>("beta", 1.0f)),
lambda1(op->GetSingleArgument<float>("lambda1", 0.001f)),
lambda2(op->GetSingleArgument<float>("lambda2", 0.001f)) {}
T alphaInv;
T beta;
T lambda1;
T lambda2;
};
template <typename T, class Context>
class GFtrlOp final : public Operator<Context> {
public:
USE_OPERATOR_CONTEXT_FUNCTIONS;
GFtrlOp(const OperatorDef& operator_def, Workspace* ws)
: Operator<Context>(operator_def, ws), params_(this) {
CAFFE_ENFORCE(
!HasArgument("alpha") || ALPHA >= InputSize(),
"Cannot specify alpha by both input and argument");
}
bool RunOnDevice() override;
protected:
GFtrlParams<T> params_;
INPUT_TAGS(VAR, N_Z, GRAD, ALPHA);
OUTPUT_TAGS(OUTPUT_VAR, OUTPUT_N_Z);
};
} // namespace caffe2
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