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Diffstat (limited to 'runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/ConstView.h')
-rw-r--r-- | runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/ConstView.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/ConstView.h b/runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/ConstView.h new file mode 100644 index 000000000..6a3fff646 --- /dev/null +++ b/runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/ConstView.h @@ -0,0 +1,111 @@ +/* + * 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 ConstView.h + * @brief This file contains ConstView class + * @ingroup COM_AI_RUNTIME + */ + +#ifndef __INTERNAL_NNAPI_TENSOR_CONST_VIEW_H__ +#define __INTERNAL_NNAPI_TENSOR_CONST_VIEW_H__ + +#include "util/tensor/Shape.h" +#include "util/tensor/Index.h" + +namespace internal +{ +namespace nnapi +{ +namespace tensor +{ + +/** + * @brief Wrapper class to read tensor values + * @tparam T The tensor element type + */ +template <typename T> class ConstView +{ +public: + /** + * @brief Construct a ConstView class + * @param[in] shape Tensor shape + * @param[in] ptr The base pointer of actual data + * @param[in] len The number of bytes + */ + ConstView(const ::nnfw::misc::tensor::Shape &shape, const uint8_t *ptr, size_t len) + : _shape{shape}, _ptr{ptr}, _len{len} + { + // DO NOTHING + } + +public: + const nnfw::misc::tensor::Shape &shape(void) const { return _shape; } + +private: + // TODO Make this as a helper function, and share it for both View<T> and ConstView<T> + /** + * @brief Calculate offset for the given tensor index + * @param[in] index Tensor index + * @return The calculated offset + */ + uint32_t offset_of(const nnfw::misc::tensor::Index &index) const + { + if (_shape.rank() == 0) + { + return 0; + } + + uint32_t offset = index.at(0); + + // Stride decreases as axis increases in NNAPI + for (uint32_t axis = 1; axis < _shape.rank(); ++axis) + { + offset *= _shape.dim(axis); + offset += index.at(axis); + } + + return offset; + } + +public: + /** + * @brief Get the value on the given index + * @param[in] index Flattened tensor index + * @return The value on the given index + */ + T at(const nnfw::misc::tensor::Index &index) const + { + const auto offset = offset_of(index); + + const T *arr = reinterpret_cast<const T *>(_ptr); + + return arr[offset]; + } + +private: + const nnfw::misc::tensor::Shape _shape; + +private: + const uint8_t *const _ptr; + const size_t _len; +}; + +} // namespace tensor +} // namespace nnapi +} // namespace internal + +#endif // __INTERNAL_NNAPI_TENSOR_CONST_VIEW_H__ |