wehub-resource-sync
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
//
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// LogTransform.cpp
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// MNNConverter
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//
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// Created by MNN on 2019/12/12.
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// Copyright © 2018, Alibaba Group Holding Limited
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//
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#include <cmath>
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#include "CaffeExtraManager.hpp"
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#include "MNN_generated.h"
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namespace MNN {
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namespace Express {
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class LogTransform : public CaffeExtraManager::Transform {
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public:
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virtual EXPRP onExecute(EXPRP expr) const override {
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auto op = expr->get();
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auto inputs = expr->inputs();
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auto base = op->main_as_Extra()->attr()->GetAs<Attribute>(0)->f();
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auto scale = op->main_as_Extra()->attr()->GetAs<Attribute>(1)->f();
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auto shift = op->main_as_Extra()->attr()->GetAs<Attribute>(2)->f();
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auto exponent = _Add(_Multiply(inputs[0], _Const(scale)), _Const(shift));
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if (fabs(base - (-1)) < 1e-6) { // base == -1, which means natural base
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return exponent->expr().first;
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}
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auto newVar = _Divide(_Log(exponent), _Log(_Const(base)));
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return newVar->expr().first;
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}
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};
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static auto gRegister = []() {
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CaffeExtraManager::get()->insert("Log", std::shared_ptr<CaffeExtraManager::Transform>(new LogTransform));
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return true;
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}();
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} // namespace Express
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} // namespace MNN
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