RISC-V now spans 100+ extensions and over a thousand instructions. Binutils, QEMU, and other projects maintain separate instruction definitions, leading to duplication, mismatches, and slower support of new features.

UDB provides a machine-readable, validated source of truth covering most of the ISA. Our generator currently produces Binutils and QEMU definitions directly from UDB, cutting the effort for standard and custom extension bring-up. And with automated CI checks against current Binutils data, everything stays aligned as the ecosystem evolves.

In this talk, we’ll show how UDB enables new and custom extension by:

• Automating part of of Binutils support
• Allowing faster integration on other SW projects like QEMU