To create an HDL file:
Open your project.
From the File menu, choose New.
Click VHDL and type a file name in the Name field. Click OK. (Do not enter a file extension; Libero adds one for you.) The HDL Editor workspace opens.
After creating your HDL file, save your file to the project by selecting Save from the File menu. Your HDL file is saved to your project and shown in the File Manager.