RISC-V Instruction Set Manual

This repository contains the source files for the RISC-V Instruction Set Manual, which consists of the Unprivileged and Privileged volumes. The preface of each document indicates the version of each standard that has been formally ratified by RISC-V International.

This work is licensed under a Creative Commons Attribution 4.0 International License. See the LICENSE file for details.

The RISC-V Instruction Set Manual is organized into the following volumes:

• Volume I: Unprivileged Architecture
• Volume II: Privileged Architecture

Official and Draft Versions

• Official versions of the specifications are available at the RISC-V International website.
• Compiled versions of the most recent drafts of the specifications can be found on the GitHub releases page.
• HTML snapshots of the latest commit can be viewed at the following locations:
  • Unprivileged spec
  • Privileged spec
• Older official versions of the specifications are archived at the GitHub releases archive.

The canonical list of open-source RISC-V implementations' marchid CSR values is available in the marchid.md file.

Contributing

See CONTRIBUTING.md for setup, build instructions, and contribution guidelines. If you would like to contribute to this documentation, please refer to the Documentation Developer's Guide.

The recommended method for building the PDF files is to use the Docker Image, as described in the RISC-V Docs Base Container Image repository.

Alternative build methods, such as local builds and GitHub Action builds, are also available and described in the Documentation Developer's Guide.

Images not rendered for EPUB files

If the eBook reader does not support embedded images, uncomment :data-uri: lines in src/riscv-privileged.adoc and src/riscv-unprivileged.adoc.

Known devices that cannot handle embedded images

• PocketBook InkPad 3

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