pocl

"Portable Computing Language (pocl) aims to become a MIT-licensed open source implementation of the OpenCL standard which can be easily adapted for new targets and devices, both for homogeneous CPU and heterogeneous GPUs/accelerators.

pocl uses Clang as an OpenCL C frontend and LLVM for the kernel compiler implementation, and as a portability layer. Thus, if your desired target has an LLVM backend, it should be able to get OpenCL support easily by using pocl.

The goal is to accomplish improved performance portability using a kernel compiler that can generate multi-work-item work-group functions that exploit various types of parallel hardware resources: VLIW, superscalar, SIMD, SIMT, multicore, multithread ...

Additional purpose of the project is to serve as a research platform for issues in parallel programming on heterogeneous platforms."

http://portablecl.org

https://github.com/pocl/pocl

https://arxiv.org/abs/1611.07083