GHDL is an open-source simulator for the VHDL language. GHDL allows 
you to compile and execute your VHDL code directly in your PC.

GHDL fully supports the 1987, 1993, 2002 versions of the IEEE 1076 
VHDL standard, and partially the 2008 and 2019 revisions.

By using a code generator based on LLVM, GHDL is much
faster than any interpreted simulator.

For documentation, see https://ghdl.github.io/ghdl/.