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 +1,34 @@
+//
+//  ZeroGrad.cpp
+//  MNN
+//
+//  Created by MNN on 2019/04/22.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#include "ReluGrad.hpp"
+#include "core/Macro.h"
+using namespace std;
+namespace MNN {
+
+class ZeroGrad : public OpGrad {
+public:
+    ZeroGrad() {
+        mType = LINEAR;
+    }
+    virtual std::vector<Express::VARP> onGrad(Express::EXPRP expr,
+                                              const std::vector<Express::VARP>& backwardOutput) override {
+        std::vector<Express::VARP> result(1, nullptr);
+        result[0] = backwardOutput[0];
+        return result;
+    }
+};
+static void _create() {
+    static ZeroGrad _c;
+    OpGrad::insert(OpType_ZeroGrad, &_c);
+
+}
+
+REGISTER_GRAD(ZeroGrad_cpp, _create);
+};
+