1. A computer program product for facilitating processing within an emulated computing environment, said computer program product comprising: a computer readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising: identifying, by a processor that is based on one system architecture, one or more system-provided routines referenced within an application written for another system architecture different from the one system architecture, the application to be emulated by the processor, and wherein the identifying identifies one or more defined routine names or one or more defined routine signatures; and based on identifying a system-provided routine, providing native code for the system-provided routine instead of emulated code for the system-provided routine.