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 +1,60 @@
+//
+//  ShapeExpandDims.cpp
+//  MNN
+//
+//  Created by MNN on 2019/01/10.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#include "shape/SizeComputer.hpp"
+#include "core/Macro.h"
+
+namespace MNN {
+class ExpandDimsComputer : public SizeComputer {
+public:
+    virtual bool onComputeSize(const MNN::Op* op, const std::vector<Tensor*>& inputs,
+                               const std::vector<Tensor*>& outputs) const override {
+        const int inputSize = (int)inputs.size();
+        MNN_ASSERT(2 == inputSize || 1 == inputSize);
+        MNN_ASSERT(1 == outputs.size());
+
+        auto input  = inputs[0];
+        auto output = outputs[0];
+
+        // default -1
+        int dim = -1;
+        if (inputSize == 2) {
+            // read dim from the second input
+            auto dims = inputs[1];
+            dim       = dims->host<int32_t>()[0];
+        } else {
+            // get dim from expand_dims parameter(axis)
+            auto param = op->main_as_ExpandDims();
+            dim        = param->axis();
+        }
+
+        if (dim < 0) {
+            dim = input->dimensions() + 1 + dim;
+        }
+        output->buffer().type       = input->buffer().type;
+        int outputShapeDims = 0;
+
+        for (int i = 0; i < input->buffer().dimensions; i++) {
+            if (i == dim) {
+                output->buffer().dim[outputShapeDims++].extent = 1;
+            }
+            output->buffer().dim[outputShapeDims++].extent = input->buffer().dim[i].extent;
+        }
+        if (dim == input->buffer().dimensions) {
+            output->buffer().dim[outputShapeDims++].extent = 1;
+        }
+        output->buffer().dimensions = outputShapeDims;
+        TensorUtils::getDescribe(output)->dimensionFormat = TensorUtils::getDescribe(input)->dimensionFormat;
+
+        return true;
+    }
+};
+
+REGISTER_SHAPE_INPUTS(ExpandDimsComputer, OpType_ExpandDims, {1});
+
+} // namespace MNN