6.2 Customizing & Integration: Vivado TCL store Integration With Xilinx Vivado's TCL store, integrating Active-HDL simulator in the Vivado work flow is easy. This combination allows users to extend Vivado's rich synthesis and implementation tool set with Active-HDL's high performance simulator. This seamless integration eliminates the need to manually map the source files between the two programs as this is all done in the backend.