OpenCL Specification Versions

OpenCL 1.2

OpenCL 1.2 includes significant new functionality including:

The new OpenCL 1.2 specification released on November 15th 2011, provides enhanced performance and functionality in response to requests from the developer community – while retaining backwards compatibility with OpenCL 1.0 and 1.1. New features in OpenCL 1.2 include seamless sharing of media and surfaces with DirectX® 9 and 11, enhanced image support, custom devices and kernels, device partitioning and separate compilation and linking of objects.

• The OpenCL 1.2 specification and header files are available in the Khronos Registry
• The OpenCL 1.2 Quick Reference card ( View online ).
• The OpenCL 1.2 Online Man pages.

OpenCL 1.1

OpenCL 1.1 includes significant new functionality including:

• Host-thread safety, enabling OpenCL commands to be enqueued from multiple host threads;
• Sub-buffer objects to distribute regions of a buffer across multiple OpenCL devices;
• User events to enable enqueued OpenCL commands to wait on external events;
• Event callbacks that can be used to enqueue new OpenCL commands based on event state changes in a non-blocking manner;
• 3-component vector data types;
• Global work-offset which enable kernels to operate on different portions of the NDRange;
• Memory object destructor callback;
• Read, write and copy a 1D, 2D or 3D rectangular region of a buffer object;
• Mirrored repeat addressing mode and additional image formats;
• New OpenCL C built-in functions such as integer clamp, shuffle and asynchronous strided copies;
• Improved OpenGL interoperability through efficient sharing of images and buffers by linking OpenCL event objects to OpenGL fence sync objects;
• Optional features in OpenCL 1.0 have been bought into core OpenCL 1.1 including: writes to a pointer of bytes or shorts from a kernel, and conversion of atomics to 32-bit integers in local or global memory.

• The OpenCL 1.1 specification and header files are available in the Khronos Registry
• The OpenCL 1.1 Quick Reference card ( View online ).
• The OpenCL 1.1 Online Man pages.

OpenCL 1.0

OpenCL (Open Computing Language) is the first open, royalty-free standard for general-purpose parallel programming of heterogeneous systems. OpenCL provides a uniform programming environment for software developers to write efficient, portable code for high-performance compute servers, desktop computer systems and handheld devices using a diverse mix of multi-core CPUs, GPUs, Cell-type architectures and other parallel processors such as DSPs.

• The OpenCL 1.0 specification and header files are available in the Khronos Registry
• The OpenCL 1.0 Quick Reference card ( View online ).
• The OpenCL 1.0 Online Man pages.