.. index:: pair: page; HardSigmoidBackward .. _doxid-dev_guide_op_hardsigmoidbackward: HardSigmoidBackward =================== General ~~~~~~~ HardSigmoidBackward operation computes gradient for HardSigmoid. The formula is defined as follows: .. math:: diff\_src = \begin{cases} diff\_dst \cdot \alpha & \text{if}\ 0 < \alpha src + \beta < 1 \\ 0 & \text{otherwise}\ \end{cases} Operation attributes ~~~~~~~~~~~~~~~~~~~~ ================================================================================================================== =============================== ==== ===================== ========= Attribute Name Descr ================================================================================================================== =============================== ==== ===================== ========= :ref:`alpha ` :math:`\alpha` in the formula. f32 Arbitrary f32 value. Required :ref:`beta ` :math:`\beta` in the formula. f32 Arbitrary f32 value. Required ================================================================================================================== =============================== ==== ===================== ========= Execution arguments ~~~~~~~~~~~~~~~~~~~ The inputs and outputs must be provided according to the index order shown below when constructing an operation. Inputs ------ ====== ============== ========= Index Argument Name Re ====== ============== ========= 0 ``src`` Required 1 ``diff_dst`` Required ====== ============== ========= Outputs ------- ====== ============== ========= Index Argument Name Re ====== ============== ========= 0 ``diff_src`` Required ====== ============== ========= Supported data types ~~~~~~~~~~~~~~~~~~~~ HardSigmoidBackward operation supports the following data type combinations. ===== ========= ===== Src Diff_dst Di ===== ========= ===== f32 f32 f32 f16 f16 f16 bf16 bf16 bf16 ===== ========= =====