Mesa’s modern Rust-written OpenCL driver for Gallium3D “Rusticl” has closed one of the few remaining gaps with the former Clover OpenCL state tracker. Merged today for Mesa 25.2 is native FP16 support.
Rusticl merged cl_khr_fp16 support for native FP16 half-float support within this OpenCL implementation. The OpenCL FP16 support has been successfully tested so far with the Asahi (Apple Silicon), Freedreno (Qualcomm Adreno), LLVMpipe, Panfrost (Arm Mali), RadeonSI (Radeon), and Zink (OpenGL on Vulkan) drivers.
Karol Herbst of Red Hat opened this merge request two months ago for OpenCL FP16 support with Rusticl to close that feature gap with the old Clover code. Today it’s merged and ready to go with next quarter’s Mesa 25.2 release.
