/MACHINE_CODE
  /NOMACHINE_CODE  (D)

  Controls whether the listing file contains a list of compiler
  generated machine code.  The /MACHINE_CODE qualifier has no effect
  unless you also specify the /LIST qualifier.

  The default, /NOMACHINE_CODE, suppresses compiler generated machine
  code in the listing file.

  If you specify the /MACHINE_CODE qualifier with the /OPTIMIZE
  qualifier, the machine code listing may not reflect the actual
  code executed for a given statement nor the order of execution.