feat: add scatter_add base (#399)

Author: voltjia

src/base/scatter_add.h

@@ -0,0 +1,63 @@
+#ifndef INFINI_OPS_BASE_SCATTER_ADD_H_
+#define INFINI_OPS_BASE_SCATTER_ADD_H_
+
+#include "operator.h"
+
+namespace infini::ops {
+
+class ScatterAdd : public Operator<ScatterAdd> {
+ public:
+  ScatterAdd(const Tensor input, const int64_t dim, const Tensor index,
+             const Tensor src, Tensor out)
+      : input_shape_{input.shape()},
+        input_strides_{input.strides()},
+        input_type_{input.dtype()},
+        index_shape_{index.shape()},
+        index_strides_{index.strides()},
+        index_type_{index.dtype()},
+        src_shape_{src.shape()},
+        src_strides_{src.strides()},
+        src_type_{src.dtype()},
+        out_shape_{out.shape()},
+        out_strides_{out.strides()},
+        out_type_{out.dtype()},
+        dim_{dim},
+        device_index_{out.device().index()} {}
+
+  virtual void operator()(const Tensor input, const int64_t dim,
+                          const Tensor index, const Tensor src,
+                          Tensor out) const = 0;
+
+ protected:
+  Tensor::Shape input_shape_;
+
+  Tensor::Strides input_strides_;
+
+  DataType input_type_;
+
+  Tensor::Shape index_shape_;
+
+  Tensor::Strides index_strides_;
+
+  DataType index_type_;
+
+  Tensor::Shape src_shape_;
+
+  Tensor::Strides src_strides_;
+
+  DataType src_type_;
+
+  Tensor::Shape out_shape_;
+
+  Tensor::Strides out_strides_;
+
+  DataType out_type_;
+
+  int64_t dim_{};
+
+  int device_index_{0};
+};
+
+}  // namespace infini::ops
+
+#endif