wehub-resource-sync
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
//
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// StridedSliceGrad.cpp
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// MNN
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//
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// Created by MNN on 2022/07/27.
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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 StridedSliceGrad : 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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std::unique_ptr<OpT> forwardOp(expr->get()->UnPack());
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int beginMask = forwardOp->main.AsStridedSliceParam()->beginMask;
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int endMask = forwardOp->main.AsStridedSliceParam()->endMask;
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int ellipsisMask = forwardOp->main.AsStridedSliceParam()->ellipsisMask;
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int newAxisMask = forwardOp->main.AsStridedSliceParam()->newAxisMask;
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int shrinkAxisMask = forwardOp->main.AsStridedSliceParam()->shrinkAxisMask;
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auto input = inputs[0];
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auto begin = inputs[1];
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auto end = inputs[2];
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auto stride = inputs[3];
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auto zeros = _ZerosLike(input);
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res[0] = _StridedSliceWrite(zeros, begin, end, stride, outputDiff, beginMask, endMask, ellipsisMask, newAxisMask, shrinkAxisMask);
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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 StridedSliceGrad _c;
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OpGrad::insert(OpType_StridedSlice, &_c);
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}
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REGISTER_GRAD(StridedSliceGrad_cpp, _create);
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};
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