/* * Copyright (c) 2018-2019 Arm Limited. * * SPDX-License-Identifier: MIT * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef ARM_COMPUTE_UTILS_HELPERS_TENSOR_TRANSFORM_H #define ARM_COMPUTE_UTILS_HELPERS_TENSOR_TRANSFORM_H #include "arm_compute/core/Types.h" namespace arm_compute { namespace helpers { namespace tensor_transform { /** Computes stride of a given index * * @param[in] index Index of tensor to calculate absolute start position * @param[in] strides Slice strides * * @return Stride at a given index */ int calculate_stride_on_index(int index, Coordinates strides); /** Computes absolute start position of a given index for a strided slice operation * * @param[in] input_shape Input tensor shape * @param[in] index Index of tensor to calculate absolute start position * @param[in] starts Start coordinates * @param[in] strides Slice strides * @param[in] begin_mask (Optional) If the ith bit of begin_mask is set, starts[i] is ignored and * the fullest possible range in that dimension is used instead. * * @return Absolute start position of a given index */ int calculate_start_on_index(TensorShape input_shape, int index, Coordinates starts, Coordinates strides, int32_t begin_mask); /** Returns the absolute end position of a given index for a strided slice operation * * @param[in] input_shape Input tensor shape * @param[in] index Index of tensor to calculate absolute start position * @param[in] start_on_index Absolute start coordinate for given index * @param[in] ends End coordinates * @param[in] strides Slice strides * @param[in] end_mask (Optional) If the ith bit of end_mask is set, end[i] is ignored and * the fullest possible range in that dimension is used instead. * @param[in] shrink_axis_mask (Optional) If the ith bit of shrink_axis_mask is set, it implies that the ith specification shrinks the dimensionality by 1. * A slice of size 1 starting from starts[i] in the dimension must be preserved. * * @return Absolute end position of a given index */ int calculate_end_on_index(TensorShape input_shape, int index, int start_on_index, Coordinates ends, Coordinates strides, int32_t end_mask = 0, int32_t shrink_axis_mask = 0); /** Calculate start, end and stride coordinates for a strided slice * * @param[in] input_shape Input tensor shape * @param[in] starts Start coordinates * @param[in] ends End coordinates * @param[in] strides Slice strides * @param[in] begin_mask (Optional) If the ith bit of begin_mask is set, starts[i] is ignored and * the fullest possible range in that dimension is used instead. * @param[in] end_mask (Optional) If the ith bit of end_mask is set, end[i] is ignored and * the fullest possible range in that dimension is used instead. * @param[in] shrink_axis_mask (Optional) If the ith bit of shrink_axis_mask is set, it implies that the ith specification shrinks the dimensionality by 1. * A slice of size 1 starting from starts[i] in the dimension must be preserved. * * @return A tuple with */ std::tuple calculate_strided_slice_coords(TensorShape input_shape, Coordinates starts, Coordinates ends, Coordinates strides, int32_t begin_mask = 0, int32_t end_mask = 0, int32_t shrink_axis_mask = 0); /** Computes output shape of strided slice * * @warning Starts and ends must be non-negative * @warning Starts, ends and final strides should have the same dimensions as the input shape * * @param[in] input_shape Input tensor shape * @param[in] starts Absolute start coordinates * @param[in] ends Absolute end coordinates * @param[in] strides Slice strides * @param[in] begin_mask (Optional) If the ith bit of begin_mask is set, starts[i] is ignored and * the fullest possible range in that dimension is used instead. * @param[in] end_mask (Optional) If the ith bit of end_mask is set, end[i] is ignored and * the fullest possible range in that dimension is used instead. * @param[in] shrink_axis_mask (Optional) If the ith bit of shrink_axis_mask is set, it implies that the ith specification shrinks the dimensionality by 1. * A slice of size 1 starting from starts[i] in the dimension must be preserved. * @param[in] return_unshrinked (Optional) Returns un-shrinked shape * * @return The output tensor shape */ TensorShape compute_strided_slice_output_shape(TensorShape input_shape, Coordinates starts, Coordinates ends, Coordinates strides, int32_t begin_mask = 0, int32_t end_mask = 0, int32_t shrink_axis_mask = 0, bool return_unshrinked = false); /** Constructs end mask in case we want to perform a slice operation using the strided slice interface * * @note Ends are inclusive in slice operations that is why construction an end mask is needed * * @param[in] ends End coordinates * * @return End mask */ int32_t construct_slice_end_mask(Coordinates ends); } // namespace tensor_tranform } // namespace helpers } // namespace arm_compute #endif /* ARM_COMPUTE_UTILS_HELPERS_TENSOR_TRANSFORM_H */