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 +1,37 @@
+//
+//  RenderGrad.cpp
+//  MNN
+//
+//  Created by MNN on 2023/07/12.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#include "OpGrad.hpp"
+#include "core/Macro.h"
+using namespace std;
+namespace MNN {
+using namespace MNN::Express;
+
+class RasterDiffGrad : public OpGrad {
+public:
+    virtual std::vector<Express::VARP> onGrad(Express::EXPRP expr,
+                                              const std::vector<Express::VARP>& backwardOutput) override {
+        std::vector<Express::VARP> res{nullptr};
+        std::unique_ptr<OpT> forwardOp(expr->get()->UnPack());
+        forwardOp->main.value = new ExtraT;
+        forwardOp->main.type = OpParameter_Extra;
+        auto diffExpr = Expr::create(forwardOp.get(), backwardOutput, 1);
+        res[0] = Variable::create(diffExpr, 0);
+        return res;
+    }
+};
+
+static void _create() {
+    static RasterDiffGrad _c;
+    OpGrad::insert(OpType_RasterDiff, &_c);
+
+}
+
+REGISTER_GRAD(RenderGrad_cpp, _create);
+};
+