> For complex designs the simulator that comes with the Vivado tools (Mentor's modelsim) is not going to cut it. It's now called QuestaSim I believe. But are y

> For complex designs the simulator that comes with the Vivado tools (Mentor's modelsim) is not going to cut it. It's now called QuestaSim I believe. But are you sure it can't handle simulating large designs? If yes, what is the full-featured software from Mentor that can? > Heck, maybe they can drive adoption of one of the up-and-coming HDL's like chisel Chisel isn't a full-blown HDL from what I understand; it's only a DSL that compiles to Verilog. In other words, you'd still need a Verilog simulator to actually run your design.