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Diffstat (limited to 'runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/View.h')
-rw-r--r-- | runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/View.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/View.h b/runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/View.h new file mode 100644 index 000000000..4766851b9 --- /dev/null +++ b/runtime/contrib/pure_arm_compute/src/internal/nnapi/tensor/View.h @@ -0,0 +1,121 @@ +/* + * 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 View.h + * @ingroup COM_AI_RUNTIME + * @brief This file defines internal::nnapi::tensor::View class + */ +#ifndef __INTERNAL_NNAPI_TENSOR_VIEW_H__ +#define __INTERNAL_NNAPI_TENSOR_VIEW_H__ + +#include "misc/tensor/Shape.h" +#include "misc/tensor/Index.h" + +namespace internal +{ +namespace nnapi +{ +namespace tensor +{ + +/** + * @brief Class to access tensor's element information using index + */ +template <typename T> class View +{ +public: + /** + * @brief Construct a new View object + * @param[in] shape Shape of tensor + * @param[in] ptr Pointer to tensor data + * @param[in] len Size of tensor (byte) + */ + // NOTE The parameter len denotes the number of bytes. + View(const ::nnfw::misc::tensor::Shape &shape, T *ptr, size_t len) : _shape{shape}, _ptr{ptr} + { + assert(shape.num_elements() * sizeof(T) == len); + } + +public: + /** + * @brief Get shape of tensor + * @return Shape of tensor + */ + const nnfw::misc::tensor::Shape &shape(void) const { return _shape; } + +private: + /** + * @brief Get position of element using index in tensor + * @param[in] index Index of element + * @return Position of element + */ + 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 value of element at index + * @param[in] index Index of element + * @return Value of element at index + */ + T at(const nnfw::misc::tensor::Index &index) const + { + const auto offset = offset_of(index); + + return _ptr[offset]; + } + + /** + * @brief Get reference of element at index + * @param[in] index Index of element + * @return Reference of element at index + */ + T &at(const nnfw::misc::tensor::Index &index) + { + const auto offset = offset_of(index); + + return _ptr[offset]; + } + +private: + nnfw::misc::tensor::Shape _shape; + +private: + T *_ptr; +}; + +} // namespace tensor +} // namespace nnapi +} // namespace internal + +#endif // __INTERNAL_NNAPI_TENSOR_VIEW_H__ |