wehub-resource-sync
42 lines
1013 B
C++
42 lines
1013 B
C++
//
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// TopKV2Grad.cpp
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// MNN
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//
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// Created by MNN on 2022/08/18.
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// Copyright © 2018, Alibaba Group Holding Limited
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//
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#include "OpGrad.hpp"
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#include "core/Macro.h"
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using namespace std;
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namespace MNN {
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using namespace MNN::Express;
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class TopKV2Grad : public OpGrad {
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public:
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virtual std::vector<Express::VARP> onGrad(Express::EXPRP expr,
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const std::vector<Express::VARP>& backwardOutput) override {
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auto inputs = expr->inputs();
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std::vector<VARP> res(inputs.size(), nullptr);
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auto outputDiff = backwardOutput[0];
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auto values = Variable::create(expr, 0);
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auto indices = Variable::create(expr, 1);
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auto zeros = _ZerosLike(inputs[0]);
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auto axis = _Scalar<int>(-1);
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res[0] = _ScatterElements(zeros, indices, outputDiff, axis);
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return res;
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}
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};
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static void _create() {
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static TopKV2Grad _c;
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OpGrad::insert(OpType_TopKV2, &_c);
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}
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REGISTER_GRAD(TopKV2Grad_cpp, _create);
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};
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