2026-06-10 –, Plenary
When the RISC-V matrix extensions effort was restructured into four complementary approaches at Summit Europe 2025 in Paris, it was a bold architectural bet — that the breadth of the RISC-V ecosystem demands not one rigid solution but a family of extensions spanning from lightweight vector-matrix primitives to fully independent matrix engines. One year later, that bet is paying off. This talk reports on the rapid progress across the matrix extension family as two of the four extensions — the Integrated Matrix Extensions (IME) and the Vector Matrix Extensions (VME) — converge on specification freeze. We trace the architectural decisions that brought IME and VME from concept to maturity: algebraic tile geometry that scales naturally with VLEN, the deliberate reuse of RVV state for seamless software integration, and the introduction of dedicated accumulator registers to unlock higher computational intensity where implementations demand it. Crucially, work is starting to unify IME and VME through a common LLVM-MLIR lowering path — giving compilers and AI/ML frameworks a single abstraction that targets both extensions, ensuring that the software ecosystem scales with the hardware rather than fragmenting across it. For Europe's semiconductor industry — from research institutions and startups to established design houses — standardized, open matrix extensions represent a strategic opportunity: competitive AI/ML and HPC capability on an open ISA, free from proprietary lock-in. RISC-V matrix support is no longer a roadmap item. It is arriving.
Dr. Philipp Tomsich is Chief Technologist and Founder of VRULL GmbH, providing strategic R&D for semiconductor companies. He chairs the RISC-V Applications & Tools Committee, serves on the RISC-V Board of Directors, and is Vice-Chair of the Technical Steering Committee, where he champions software ecosystem growth and standards alignment, including efforts to publish RISC-V under ISO.
He instigated the standards-development matrix operations and AI/ML, serving as principal editor of the Integrated Matrix Extension and as the Vice-chair of the Attached Matrix TG.