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diff --git a/runtime/contrib/pure_arm_compute/src/internal/nnapi/matrix/Reader.h b/runtime/contrib/pure_arm_compute/src/internal/nnapi/matrix/Reader.h
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+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file    Reader.h
+ * @ingroup COM_AI_RUNTIME
+ * @brief   This file defines internal::nnapi::matrix::Reader class
+ */
+#ifndef __INTERNAL_NNAPI_MATRIX_READER_H__
+#define __INTERNAL_NNAPI_MATRIX_READER_H__
+
+#include "misc/matrix/Shape.h"
+#include "misc/matrix/Reader.h"
+
+namespace internal
+{
+namespace nnapi
+{
+namespace matrix
+{
+
+/**
+ * @brief   Class to support reading element in matrix
+ */
+template <typename T> class Reader final : public nnfw::misc::matrix::Reader<T>
+{
+public:
+  /**
+   * @brief     Construct a new Reader object
+   * @param[in] shape Shape of matrix
+   * @param[in] ptr   Pointer to matrix data
+   * @param[in] len   Size of matrix (byte)
+   */
+  // NOTE The parameter len denotes the number of bytes.
+  Reader(const ::nnfw::misc::matrix::Shape &shape, const T *ptr, size_t len)
+      : _shape{shape}, _ptr{ptr}
+  {
+    assert(shape.H * shape.W * sizeof(T) == len);
+  }
+
+public:
+  /**
+   * @brief   Get shape of matrix
+   * @return  Shape of matrix
+   */
+  const nnfw::misc::matrix::Shape &shape(void) const { return _shape; }
+
+public:
+  /**
+   * @brief     Get value of element for matrix
+   * @param[in] row Row index
+   * @param[in] col Column index
+   * @return    Value of element
+   */
+  T at(uint32_t row, uint32_t col) const override
+  {
+    // NNAPI uses NHWC ordering
+    uint32_t index = 0;
+
+    index += row * _shape.W;
+    index += col;
+
+    return _ptr[index];
+  }
+
+private:
+  nnfw::misc::matrix::Shape _shape;
+
+private:
+  const T *_ptr;
+};
+
+} // namespace matrix
+} // namespace nnapi
+} // namespace internal
+
+#endif // __INTERNAL_NNAPI_MATRIX_READER_H__