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RISC-V Technical Specifications Archive

RISC-V Technical Specifications Archive

This page contains the list of all archived ratified technical specification version.  For the most recent versions of any specification, see the RISC-V Technical Specifications page.

NOTE: specifications not found on this page have only one version and thus are only available on the RISC-V Technical Specifications page.



Archive Contents

ISA Specifications

These sections contain previous, complete versions of the two ISA specification volumes.

The RISC-V Instruction Set Manual Volume I: Unprivileged ISA 

Version

Publish Date

RISC-V Community

Source Repository

Version

Publish Date

RISC-V Community

Source Repository

20191213

Dec. 2019

Unprivileged Horizontal Committee

riscv/riscv-isa-manual

The RISC-V Instruction Set Manual Volume II: Privileged Architecture

Version

Publish Date

RISC-V Community

Source Repository

Version

Publish Date

RISC-V Community

Source Repository

20211203

Dec. 2021

Privileged Horizontal Committee

riscv/riscv-isa-manual

ISA Ratification Specifications

This section contains the specifications which were independently ratified and subsequently have been pulled into the appropriate ISA volumes published on the RISC-V Technical Specifications page.

Specification name

Ratified

New extension(s) or Profile(s)

RISC-V Community

Source

Specification name

Ratified

New extension(s) or Profile(s)

RISC-V Community

Source

RISC-V Supervisor Counter Delegation

March 2024

Smcdeleg, Ssccfg

Privileged Horizontal Committee

riscv-smcdeleg-ssccfg

May-Be-Operations

March 2024

Zimop, Zcmop

Unprivileged Horizontal Committee

 

RISC-V Indirect CSR Access (Smcsrind/Sscsrind)

February 2024

Smcsrind, Sscsrind

Privileged Horizontal Committee

riscv-indirect-csr-access

RISC-V Integer Conditional (Zicond) operations extension

November 2023

Zicond

Unprivileged Horizontal Committee

riscv-zicond

Hardware Updating of PTE A/D Bits (Svadu)

November 2023

Svadu

Privileged Horizontal Committee

riscv-svadu

RISC-V Cycle and Instret Privilege Mode Filtering (Smcntrpmf)

November 2023

Smcntrpmf

Privileged Horizontal Committee

riscv-smcntrpmf

Atomic Compare-and-Swap (CAS) Instructions (Zacas)

November 2023

Zacas

Unprivileged Horizontal Committee

riscv-zacas

RISC-V Cryptography Extensions Volume II: Vector Instructions

September 2023

Zvbb, Zvbc, Zvkb, Zvkg, Zvkn, Zvknc, Zvkned, Zvkng, Zvknha, Zvknhb, Zvks, Zvksc, Zvksed, Zvksg, Zvksh, Zvkt

Unprivileged Horizontal Committee

riscv-crypto

"Zfa" Standard Extension for Additional Floating-Point Instructions

September 2023

Zfa

Unprivileged Horizontal Committee

 

RISC-V Advanced Interrupt Architecture

June 2023

Smaia, Ssaia

Privileged Horizontal Committee

riscv-aia

“Zvfh/Zvfhmin:” Vector Extension for Half-Precision Floating-Point Arithmetic/Vector Extension for Minimal Half-
Precision Floating-Point Arithmetic

June 2023

Zvfh, Zvfhmin

Unprivileged Horizontal Committee

 

“Zihintntl” Non-Temporal Locality Hints

May 2023

Zihintntl

Unprivileged Horizontal Committee

 

RISC-V Code Size Reduction

April 2023

Zca, Zcb, Zcd, Zce, Zcf, Zcmp, Zcmt

Unprivileged Horizontal Committee

riscv-code-size-reduction

"Zicntr" and "Zihpm" Counters

March 2023

Zicntr, Zihpm

Unprivileged Horizontal Committee

 

RV32E and RV64E Base Integer Instruction Sets

January 2023

RV32E/RV64E

Unprivileged Horizontal Committee



“Ztso” Standard Extension for Total Store Ordering

January 2023

Ztso

Unprivileged Horizontal Committee



RISC-V Wait-on-Reservation-Set (Zawrs) extension

November 2022

Zawrs