diff options
Diffstat (limited to 'arm_compute/core/utils')
| -rw-r--r-- | arm_compute/core/utils/misc/ShapeCalculator.h | 48 |
1 files changed, 43 insertions, 5 deletions
diff --git a/arm_compute/core/utils/misc/ShapeCalculator.h b/arm_compute/core/utils/misc/ShapeCalculator.h index df907c106e..9f9f53ed8b 100644 --- a/arm_compute/core/utils/misc/ShapeCalculator.h +++ b/arm_compute/core/utils/misc/ShapeCalculator.h @@ -1494,15 +1494,53 @@ inline TensorShape compute_pool3d_shape(const TensorShape &src, Pooling3dLayerIn return output_shape; } +/** Calculate the gather output shape of a tensor + * + * @param[in] input_shape Input tensor shape + * @param[in] indices_shape Indices tensor shape. Only supports for 2d and 3d indices + * @param[in] actual_axis Axis to be used in the computation + * + * @note Let input_shape be (X,Y,Z) and indices shape (W,O,P) and axis 1 + * the new shape is computed by replacing the axis in the input shape with + * the indice shape so the output shape will be (X,W,O,P,Z) + * + * @return the calculated shape + */ inline TensorShape compute_gather_shape(const TensorShape &input_shape, const TensorShape &indices_shape, uint32_t actual_axis) { - ARM_COMPUTE_ERROR_ON(indices_shape.num_dimensions() > 1); ARM_COMPUTE_ERROR_ON(input_shape.num_dimensions() > 4); ARM_COMPUTE_ERROR_ON(actual_axis >= input_shape.num_dimensions()); - - TensorShape output_shape = input_shape; - output_shape[actual_axis] = indices_shape[0]; - + ARM_COMPUTE_ERROR_ON(indices_shape.num_dimensions() > 3); + TensorShape output_shape = input_shape; + if(indices_shape.num_dimensions() == 1u) + { + output_shape[actual_axis] = indices_shape[0]; + } + else + { + const auto ind_num_dims + { + indices_shape.num_dimensions() + }; + output_shape.shift_right(ind_num_dims - 1); + switch(actual_axis) + { + case 1: + { + output_shape[0] = input_shape[0]; + for(size_t idx = 0; idx < ind_num_dims; ++idx) + { + output_shape.set(actual_axis + idx, indices_shape[idx], false); + } + break; + } + default: + { + // 2d and 3d indices are only supported for axis == 1 + ARM_COMPUTE_ERROR_ON(actual_axis != 1 && indices_shape.num_dimensions() > 1); + } + } + } return output_shape; } } // namespace shape_calculator |