The xrun command lets you run the simulator by specifying all input files and command-line options on a single command line. xrun takes files from different simulation languages, such as Verilog, SystemVerilog (SV), VHDL, Verilog-AMS, VHDL-AMS, Specman e , as well as C and C++ general programming language files, and compiles them using the appropriate compilers based on their file extensions. After compiling the input files, xrun automatically runs xmelab to elaborate the design and then xmsim to simulate the design
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