Source-to-source Compilation of OpenACC

Abstract

The OpenACC framework was created to alleviate the problems with programming graphical processing unit. We implemented a compiler, which added OpenACC support to the Java programming language. We used source-to-source translation to compile Java code annotated with OpenACC directives into Java code which uses OpenCL to execute computations on the GPU. The code compiled with our compiler is compatible with any Java compiler and runs on any machine that supports the Java virtual machine and OpenCL. Due to the size of the OpenACC standard, we focused mostly on the core features of the framework, such as loop parallelization and data transfer. The code generated with our compiler achieved around a 50\% speed-up, and achieved parity with native C++ programs using OpenCL