Terminology and Resources

OpenCL 2.1 Quick Ref Card: https://www.khronos.org/registry/cl/sdk/2.1/docs/OpenCL-2.1-refcard.pdf

Java Transpiler

Aparapi: https://github.com/Syncleus/aparapi
TornadoVM: https://github.com/beehive-lab/TornadoVM
- Example Kernels: https://github.com/beehive-lab/TornadoVM/blob/master/benchmarks/src/main/java/uk/ac/manchester/tornado/benchmarks/ComputeKernels.java

Java Bindings

Foreign Function and Memory API (FFM) Module (built-in)

OpenCL: 2.2
Baseline: Java 26 (preview)
JVM Options: --enable-preview --add-modules jdk.incubator.vector

As generated via jextract.

(e.g. get jextract from https://jdk.java.net/jextract/)

Generating OpenCL Java sources (using ROCm 7.14 on Debian)

cd /tmp
mkdir generated
jextract \
  --output generated \
  --target-package jcompute.opencl.ffm
  -I/opt/rocm/include \
  -I/opt/rocm/include/CL \
  /opt/rocm/include/CL/opencl.h

JavaCPP(org.bytedeco)

OpenCL: 3.0
Baseline: Java 7 SE
Project: https://github.com/bytedeco/javacpp-presets/tree/master/opencl
Maven: https://mvnrepository.com/artifact/org.bytedeco/opencl
Used by: JCompute

<dependency>
    <groupId>org.bytedeco</groupId>
    <artifactId>opencl-platform</artifactId>
    <version>3.0-1.5.7</version>
</dependency>

Jocl (jogamp)

OpenCL: 1.1
Built with: 1.8.0_60-b27
Project: https://jogamp.org/jocl/www/
Maven: https://mvnrepository.com/artifact/org.jogamp.jocl/jocl
Used by: JCompute

<dependency>
    <groupId>org.jogamp.jocl</groupId>
    <artifactId>jocl</artifactId>
    <version>2.3.2</version>
</dependency>

Jocl (org.jocl)

OpenCL: 1.1 (1.2 = ?)
Built with: 1.8.0_261
Project: http://www.jocl.org/
Maven: https://mvnrepository.com/artifact/org.jocl/jocl
Used by: Bytecoder

<dependency>
    <groupId>org.jocl</groupId>
    <artifactId>jocl</artifactId>
    <version>2.0.4</version>
</dependency>

Nativelibs4java/JavaCL

OpenCL 1.1 (1.2 = ?)
Built with: 1.8.0_31
Project: https://github.com/nativelibs4java/JavaCL
Maven: https://mvnrepository.com/artifact/com.nativelibs4java/javacl
Used by: JScience

<dependency>
    <groupId>com.nativelibs4java</groupId>
    <artifactId>javacl</artifactId>
    <version>1.0.0-RC4</version>
</dependency>