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The following command translates your design to a VHDL file.
ngd2vhdl [options] infile[.ngd|.nga] [outfile[.vhd]]
Options can be any number of the NGD2VHDL options listed in the “NGD2VHDL Options” section. They do not need to be listed in any particular order. Separate multiple options with spaces.
Infile [.ngd|.nga] is the input NGD or NGA file. If you enter a file name without an extension, NGD2VHDL looks for a file with an .nga extension and the name you specified. If you want to translate an NGD file, you must enter the .ngd extension. Without the .ngd extension NGD2VHDL does not use the NGD file as input, even if an NGA file is not present.
Outfile[.vhd] indicates the file to which the VHDL output of NGD2VHDL is written. Default is infile.vhd (infile is the same root name as the input file). The SDF file has the same root name as the VHDL file.