.. index:: pair: page; GELUBackward .. _doxid-dev_guide_op_gelubackward: GELUBackward ============ General ~~~~~~~ GELUBackward operation computes gradient for GELU. Operation attributes ~~~~~~~~~~~~~~~~~~~~ ================================================================================================================= ================================================ =========== ====================================== ===================== Attribute Name Description Value Type Supported Values Required or Optional ================================================================================================================= ================================================ =========== ====================================== ===================== :ref:`mode ` Specifies the computation mode of GELUBackward. string ``gelu_erf`` (default), ``gelu_tanh`` 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`` Required 1 ``diff_dst`` Required ====== ============== ===================== Outputs ------- ====== ============== ===================== Index Argument Name Required or Optional ====== ============== ===================== 0 ``diff_src`` Required ====== ============== ===================== Supported data types ~~~~~~~~~~~~~~~~~~~~ GELUBackward operation supports the following data type combinations. ===== ========= ========= Src Diff_dst Diff_src ===== ========= ========= f32 f32 f32 f16 f16 f16 bf16 bf16 bf16 ===== ========= ========= Implementation Notes ~~~~~~~~~~~~~~~~~~~~ GELUBackward 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.