.. index:: pair: page; EluBackward .. _doxid-dev_guide_op_elubackward: EluBackward =========== General ~~~~~~~ EluBackward operation computes gradient for Elu operation. Operation attributes ~~~~~~~~~~~~~~~~~~~~ ==================================================================================================================== ========================================================================================== =========== ================================= ===================== Attribute Name Description Value Type Supported Values Required or Optional ==================================================================================================================== ========================================================================================== =========== ================================= ===================== :ref:`alpha ` Scale for the negative factor. f32 Arbitrary non-negative f32 value Required :ref:`use_dst ` If true, use ``dst`` of Elu operation to calculate the gradient. Otherwise, use ``src`` . bool ``true`` (default), ``false`` Optional ==================================================================================================================== ========================================================================================== =========== ================================= ===================== Execution arguments ~~~~~~~~~~~~~~~~~~~ The inputs and outputs must be provided according to below index order when constructing an operation. Inputs ------ ====== ================== ===================== Index Argument Name Required or Optional ====== ================== ===================== 0 ``src`` / ``dst`` Required 1 ``diff_dst`` Required ====== ================== ===================== Outputs ------- ====== ============== ===================== Index Argument Name Required or Optional ====== ============== ===================== 0 ``diff_src`` Required ====== ============== ===================== Supported data types ~~~~~~~~~~~~~~~~~~~~ EluBackward operation supports the following data type combinations. ========== ========= ========= Src / Dst Diff_dst Diff_src ========== ========= ========= f32 f32 f32 f16 f16 f16 bf16 bf16 bf16 ========== ========= ========= Implementation Notes ~~~~~~~~~~~~~~~~~~~~ EluBackward supports in-place operations, meaning that ``diff_dst`` can be used as both input and output (``diff_src``). In case of in-place operation, the original ``diff_dst`` data will be overwritten. This support is limited to cases when data types of ``diff_dst`` and ``diff_src`` are identical. Use in-place operations whenever possible for performance.