Hello Wen,
You can use the command "hdllib" (HDL Coder) at the MATLAB command line to create a library of HDL-supported blocks from all your installed products. You can find more about the same in the following documentation:
The output of the command would look like this:
As you can see, the "DSP System Toolbox" as well as the "DSP HDL Toolbox" has many filter blocks that support HDL Code Generation.
hope it helps.
