VHDL
IEEE-standardised hardware description language — the dominant choice for military and aerospace FPGA design.
static
compiled
since 1983
concurrentdeclarativehardware
VHDL (VHSIC Hardware Description Language) was developed under a US Department of Defense initiative and is strongly typed compared to Verilog. Its verbosity makes intent explicit, which suits safety-critical military and aerospace applications. GHDL provides an open-source VHDL simulator; commercial tools from Xilinx and Intel/Altera support both Verilog and VHDL.