chore: import upstream snapshot with attribution

2026-07-13 13:33:03 +08:00
commit 5b57521aa1
8226 changed files with 3425766 additions and 0 deletions
@@ -0,0 +1,43 @@
+//
+//  RoiPoolGrad.cpp
+//  MNN
+//
+//  Created by MNN on 2022/11/23.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#include "OpGrad.hpp"
+#include "core/Macro.h"
+using namespace std;
+namespace MNN {
+using namespace MNN::Express;
+
+class RoiPoolGrad : public OpGrad {
+public:
+    virtual std::vector<Express::VARP> onGrad(Express::EXPRP expr, const std::vector<Express::VARP>& backwardOutput) override {
+        std::vector<Express::VARP> res(1, nullptr);
+        auto input = expr->inputs()[0];
+        auto roi = expr->inputs()[1];
+
+        std::unique_ptr<OpT> forwardOp(expr->get()->UnPack());
+        auto param = forwardOp->main.AsRoiParameters();
+        int pooledHeight = param->pooledHeight;
+        int pooledWidth = param->pooledWidth;
+        auto spatialScale = param->spatialScale;
+
+        res[0] = _ROIPooling(input, roi, pooledHeight, pooledWidth, spatialScale, true, _Convert(backwardOutput[0], NC4HW4));
+        res[0] = _Convert(res[0], input->getInfo()->order);
+
+        return res;
+    }
+};
+
+static void _create() {
+    static RoiPoolGrad _c;
+    OpGrad::insert(OpType_ROIPooling, &_c);
+
+}
+
+REGISTER_GRAD(RoiPoolGrad_cpp, _create);
+};
+