You can specify different file types on the xrun command line. xrun uses the file extension to determine the file type, such as Verilog (.v) , Verilog-AMS (.vams), and analog (.scs). For example, the following xrun command runs the AMS Designer simulation using the Spectre solver:
xrun top.v test1.vams test.scs
To specify an AMS Designer simulation using the APS solver, type the following xrun command:
xrun -solver aps top.v test1.vams test.scs