Yosys

https://yosyshq.readthedocs.io/projects/yosys/en/0.41/introduction.html

Levels of Abstraction

LevelsProcessYosys
System Level
System Design
High Level
High Level Synthesis (HLS)
Behavioral Level
Behavioral Synthesis✅
Register-Transfer Level (RTL)✅
RTL Synthesis✅
Logical Gate Level✅
Logic Synthesis✅
Physical Gate Level
Cell Library
Switch Level

Adapted from [yosys's levels_of_abstraction.svg](https://yosyshq.readthedocs.io/projects/yosys/en/latest/_images/levels_of_abstraction.svg)