Según esta Nota de Prensa…
” …this code will contain the parser that reads the language and creates intermediate code for compilation, as well as a generic back-end. Together, these components provide everything required to create optimized Cg compilers for other platforms and architectures. In addition to the NVIDIA Cg Compiler, NVIDIA has provided full source code for example shaders in the NVIDIA Cg Toolkit.” (Fuente: Nvidia)