.. index:: pair: page; Concat .. _doxid-dev_guide_op_concat: Concat ====== General ~~~~~~~ Concat operation concatenates :math:`N` tensors over ``axis`` (here designated :math:`C`) and is defined as (the variable names follow the standard :ref:`Naming Conventions `): .. math:: \dst(\overline{ou}, c, \overline{in}) = \src_i(\overline{ou}, c', \overline{in}), where :math:`c = C_1 + .. + C_{i-1} {}_{} + c'`. Operation attributes ~~~~~~~~~~~~~~~~~~~~ ================================================================================================================= ======================================================= =========== ========================================================== ===================== Attribute Name Description Value Type Supported Values Required or Optional ================================================================================================================= ======================================================= =========== ========================================================== ===================== :ref:`axis ` Specifies dimension along which concatenation happens. s64 A s64 value in the range of [-r, r-1] where r = rank(src) Required ================================================================================================================= ======================================================= =========== ========================================================== ===================== 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_i`` Required ====== ============== ===================== .. note:: At least one input tensor is required. Data types and ranks of all input tensors should match. The dimensions of all input tensors should be the same except for the dimension specified by ``axis`` attribute. Outputs ------- ====== ============== ===================== Index Argument Name Required or Optional ====== ============== ===================== 0 ``dst`` Required ====== ============== ===================== Supported data types ~~~~~~~~~~~~~~~~~~~~ Concat operation supports the following data type combinations. ====== ===== Src_i Dst ====== ===== f32 f32 f16 f16 bf16 bf16 ====== =====