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.


2017-04-10: Portable Computing Language (pocl) v0.14 released

2016-11-03: Hiring: Enthusiastic Open Source Developers

The original developers of pocl, the Customized Parallel Computing (CPC) group of Department of Pervasive Computing of Tampere University of Technology (Finland) is hiring software developers to work on pocl's OpenCL standard conformance.

2016-07-01: pocl in Texas Instruments' OpenCL SDK

Read here how TI benefits from the modular structure of pocl by being able to utilize the "de-SPMD" kernel compiler to produce efficient multi-WI work-group execution when running OpenCL kernels on their DSPs.

2016-05-23: HSA driver status update

In case you have been wondering what's the status of the pocl-hsa driver, here's a summary.

2016-04-04: Portable Computing Language (pocl) v0.13 released

2015-12-04: Added a master's thesis from Delft and a publication from Bristol

The master's thesis from TUDelft uses pocl for OpenCL support on a research platform. The Bristol's publication uses pocl in context of an OpenCL to FPGA flow.

If any of you have more publications or thesis about using or enhancing pocl somehow, please let us know.

2015-10-26: Portable Computing Language (pocl) v0.12 released

2015-03-12: Portable Computing Language (pocl) v0.11 released

2014-09-16: Added a 'publications' section with a couple of papers in it

2014-09-04: Portable Computing Language (pocl) v0.10 released

2014-07-24: pocl's Android port now at beta.

2014-01-29: Portable Computing Language (pocl) v0.9 released

2013-09-12: pocl included in Fedora

2013-08-12: Portable Computing Language (pocl) v0.8 released

2013-02-04: Project renamed to POrtable Computing Language (pocl)

The project was renamed to POrtable Computing Language (pocl) to avoid trademark uncertainties (was: Portable OpenCL). It's still pronounced "pogle"! :)

2013-01-09: 0.7 released!

The source package, the change log, and the release annoucement are here.

Current status

A lot of OpenCL programs, projects and test suites work out of the box, but there are still unimplemented OpenCL APIs. These will be added gradually as needed by new tested applications.

Patch contributions welcomed, of course!

The following OpenCL applications are known to work with pocl:

pocl has been tested on the following platforms supported by LLVM:

Feature highlights