2 files changed, 50 insertions, 4 deletions
diff --git a/compute_kernel_writer/include/ckw/KernelWriter.h b/compute_kernel_writer/include/ckw/KernelWriter.h
index 93ae8aecd6..15c99fe652 100644
--- a/compute_kernel_writer/include/ckw/KernelWriter.h
+++ b/compute_kernel_writer/include/ckw/KernelWriter.h
@@ -34,6 +34,7 @@
 #include <functional>
 #include <memory>
 #include <string>
+#include <tuple>
 
 namespace ckw
 {
@@ -42,6 +43,7 @@ namespace ckw
 class Kernel;
 class TensorInfo;
 class TensorSampler;
+class TileArea;
 class TileInfo;
 
 enum class DataType;
@@ -313,7 +315,7 @@ public:
      * @param[in] batch     batch
      */
     virtual void op_load_indirect(const TileOperand &tile_op, const TensorOperand &tensor_op, TensorSampler &sampler,
-        const TileOperand &x, const TileOperand &y, const TileOperand &z, const TileOperand &batch_op) = 0;
+                                  const TileOperand &x, const TileOperand &y, const TileOperand &z, const TileOperand &batch_op) = 0;
 
 protected:
     // =============================================================================================
@@ -355,8 +357,8 @@ protected:
     /** Create a new tile operand referring to the specified tile object. */
     static TileOperand create_tile_operand(ITile &tile);
 
-    /** Get the reference to tile object from the tile operand. */
-    static ITile &get_tile(const TileOperand &operand);
+    /** Get the reference to the tile object and the active area from the tile operand. */
+    static std::tuple<ITile &, TileArea> get_tile(const TileOperand &operand);
 
     /** Create a new tensor operand from a tensor object. */
     static TensorOperand create_tensor_operand(ITensor &tensor);
diff --git a/compute_kernel_writer/include/ckw/TileOperand.h b/compute_kernel_writer/include/ckw/TileOperand.h
index 873a9825f3..56dc5e7b2b 100644
--- a/compute_kernel_writer/include/ckw/TileOperand.h
+++ b/compute_kernel_writer/include/ckw/TileOperand.h
@@ -25,6 +25,8 @@
 #ifndef CKW_INCLUDE_CKW_TILEOPERAND_H
 #define CKW_INCLUDE_CKW_TILEOPERAND_H
 
+#include <cstdint>
+
 namespace ckw
 {
 
@@ -41,13 +43,55 @@ public:
     friend class KernelWriter;
     friend class TensorOperand;
 
+    /** Get a row vector of the current tile operand.
+     *
+     * @param[in] row The index of the row to be accessed in the current tile operand.
+     *
+     * @return A new tile operand referring to a row of the current tile operand.
+     */
+    TileOperand row(int32_t row) const;
+
+    /** Get a scalar element of the current tile operand.
+     *
+     * @param[in] row The index of the row to be accessed in the current tile operand.
+     * @param[in] col The index of the column to be accessed in the current tile operand.
+     *
+     * @return A new tile operand referring to a scalar element of the current tile operand.
+     */
+    TileOperand scalar(int32_t row, int32_t col) const;
+
 private:
     // These are hidden from the public API to avoid any misuse.
 
     /** Initialize a new instance of @ref TileOperand class for the given tile. */
     TileOperand(ITile &tile);
 
-    ITile &_tile;
+    /** Initialize a new instance of @ref TileOperand class that is the sub-tile of the given tile. */
+    TileOperand(const TileOperand &operand, int32_t row_start, int32_t row_end, int32_t col_start, int32_t col_end);
+
+    /** Get a sub-tile of the current tile operand.
+     *
+     * The range of rows and columns is defined by pairs of start and end indices, inclusive lower and exclusive upper.
+     * In other words, any row and column indices satisfying the following conditions will be part of the sub-tile:
+     *
+     *   row_start <= row_index < row_end
+     *   col_start <= col_index < col_end
+     *
+     * @param[in] row_start The start index of the row range.
+     * @param[in] row_end   The end index of the row range.
+     * @param[in] col_start The start index of the column range.
+     * @param[in] col_end   The end index of the column range.
+     *
+     * @return A new tile operand refering to the same tile but with the new active area.
+     */
+    TileOperand tile(int32_t row_start, int32_t row_end, int32_t col_start, int32_t col_end) const;
+
+    ITile *_tile;
+
+    int32_t _row_start;
+    int32_t _row_end;
+    int32_t _col_start;
+    int32_t _col_end;
 };
 
 } // namespace ckw