feat: add fractional_max_pool2d base

src/base/fractional_max_pool2d.h

@@ -0,0 +1,71 @@
+#ifndef INFINI_OPS_BASE_FRACTIONAL_MAX_POOL2D_H_
+#define INFINI_OPS_BASE_FRACTIONAL_MAX_POOL2D_H_
+
+#include "operator.h"
+
+namespace infini::ops {
+
+class FractionalMaxPool2d : public Operator<FractionalMaxPool2d> {
+ public:
+  FractionalMaxPool2d(const Tensor input,
+                      const std::vector<int64_t> kernel_size,
+                      const std::vector<int64_t> output_size,
+                      const Tensor random_samples, Tensor output,
+                      Tensor indices)
+      : input_shape_{input.shape()},
+        input_strides_{input.strides()},
+        input_type_{input.dtype()},
+        random_samples_shape_{random_samples.shape()},
+        random_samples_strides_{random_samples.strides()},
+        random_samples_type_{random_samples.dtype()},
+        output_shape_{output.shape()},
+        output_strides_{output.strides()},
+        output_type_{output.dtype()},
+        indices_shape_{indices.shape()},
+        indices_strides_{indices.strides()},
+        indices_type_{indices.dtype()},
+        kernel_size_{kernel_size},
+        output_size_{output_size},
+        device_index_{output.device().index()} {}
+
+  virtual void operator()(const Tensor input,
+                          const std::vector<int64_t> kernel_size,
+                          const std::vector<int64_t> output_size,
+                          const Tensor random_samples, Tensor output,
+                          Tensor indices) const = 0;
+
+ protected:
+  Tensor::Shape input_shape_;
+
+  Tensor::Strides input_strides_;
+
+  DataType input_type_;
+
+  Tensor::Shape random_samples_shape_;
+
+  Tensor::Strides random_samples_strides_;
+
+  DataType random_samples_type_;
+
+  Tensor::Shape output_shape_;
+
+  Tensor::Strides output_strides_;
+
+  DataType output_type_;
+
+  Tensor::Shape indices_shape_;
+
+  Tensor::Strides indices_strides_;
+
+  DataType indices_type_;
+
+  std::vector<int64_t> kernel_size_{};
+
+  std::vector<int64_t> output_size_{};
+
+  int device_index_{0};
+};
+
+}  // namespace infini::ops
+
+#endif