You can use the /Fa option (Windows*) or -S and -o options (Linux* and macOS*) to specify an alternate name for an assembly file. The compiler generates an assembly file named myasm.asm (Windows) or myasm.s (Linux and macOS*).
For C/C++ projects:
// Linux and macOS* icpc -S -omyasm.s x.cpp
// Windows
icl /Famyasm x.cpp