From: Bill Wendling
Renderscript + is Android's advanced 3D graphics rendering and compute API. It provides a + portable C99-based language with extensions to facilitate common use cases + for enhancing graphics and thread level parallelism. The Renderscript + compiler frontend is based on Clang/LLVM. It emits a portable bitcode format + for the actual compiled script code, as well as reflects a Java interface for + developers to control the execution of the compiled bitcode. Executable + machine code is then generated from this bitcode by an LLVM backend on the + device. Renderscript is thus able to provide a mechanism by which Android + developers can improve performance of their applications while retaining + portability.
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