You can import an HLS function into your Vitis Model
Composer design using the xmcImportFunction command as
described in Importing C/C++ Code as Custom Blocks. You can simulate the
block along with other blocks available in the Model Composer HLS library and generate
HLS code from a system comprised of one or more imported HLS function blocks and other
HLS blocks from the HLS library,except for HLS Kernel block. Vitis
Model Composer can also import HLS kernels. This section describes HLS Kernels and how
it is different from an HLS function.