.. index:: pair: page; AbsBackward .. _doxid-dev_guide_op_absbackward: AbsBackward =========== General ~~~~~~~ AbsBackward operation computes gradient for Abs operation. .. math:: dst = \begin{cases} diff\_dst & \text{if}\ src > 0 \\ -diff\_dst & \text{if}\ src < 0 \\ 0 & \text{if}\ src = 0 \\ \end{cases} Operation attributes ~~~~~~~~~~~~~~~~~~~~ AbsBackward operation does not support any attribute. 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 ~~~~~~~~~~~~~~~~~~~~ AbsBackward operation supports the following data type combinations. ===== ========= ========= Src Diff_dst Diff_src ===== ========= ========= f32 f32 f32 f16 f16 f16 bf16 bf16 bf16 ===== ========= =========