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Diffstat (limited to 'runtime/libs/misc/include/misc/tensor/NonIncreasingStride.h')
-rw-r--r-- | runtime/libs/misc/include/misc/tensor/NonIncreasingStride.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/runtime/libs/misc/include/misc/tensor/NonIncreasingStride.h b/runtime/libs/misc/include/misc/tensor/NonIncreasingStride.h new file mode 100644 index 000000000..3bc0c115c --- /dev/null +++ b/runtime/libs/misc/include/misc/tensor/NonIncreasingStride.h @@ -0,0 +1,88 @@ +/* + * 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 NonIncreasingStride.h + * @ingroup COM_AI_RUNTIME + * @brief This file contains nnfw::misc::tensor::NonIncreasingStride class + */ +#ifndef __NNFW_MISC_TENSOR_NON_INCREASING_STRIDE_H__ +#define __NNFW_MISC_TENSOR_NON_INCREASING_STRIDE_H__ + +#include "misc/tensor/Shape.h" +#include "misc/tensor/Index.h" + +#include <vector> + +namespace nnfw +{ +namespace misc +{ +namespace tensor +{ + +/** + * @brief Class to represent strides where stride[N-1] >= stride[N] holds for all N < rank + */ +class NonIncreasingStride +{ +public: + /** + * @brief Initialize the stride data using @c Shape + * @param[in] shape to build stride info + * @return N/A + */ + void init(const Shape &shape) + { + _stride.resize(shape.rank()); + + // Scalar + if (shape.rank() == 0) + return; + + _stride.at(shape.rank() - 1) = 1; + + for (uint32_t axis = shape.rank() - 1; axis > 0; --axis) + { + _stride.at(axis - 1) = _stride.at(axis) * shape.dim(axis); + } + } + +public: + /** + * @brief Get an stride value for specific axis + * @param[in] axis Axis of stride + * @return The value of stride + */ + uint32_t at(uint32_t axis) const { return _stride.at(axis); } + +public: + /** + * @brief Get the 1-D offset of specified index for n-D tensor + * @param index @c Index object + * @return 1-D offset of index + */ + uint32_t offset(const Index &index) const; + +private: + std::vector<uint32_t> _stride; +}; + +} // namespace tensor +} // namespace misc +} // namespace nnfw + +#endif // __NNFW_MISC_TENSOR_NON_INCREASING_STRIDE_H__ |