Tool Specific init.tcl - Tool Specific init.tcl - 2026.1 English - UG900

Vivado Design Suite User Guide: Logic Simulation (UG900)
Document ID
UG900
Release Date
2026-07-08
Version
2026.1 English

During the execution of the simulation, Vivado simulator sources the init file present at the following location:

$HOME/.Xilinx/xsim/xsim_init.tcl

You can use it to set a property across multiple runs. In such a scenario, you can write these inside a Tcl file, and Vivado simulator sources this Tcl file before time 0' during execution.