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
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
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
RISC-V Supervisor Counter Delegation	March 2024	Smcdeleg, Ssccfg	Privileged Horizontal Committee
May-Be-Operations	March 2024	Zimop, Zcmop	Unprivileged Horizontal Committee
RISC-V Indirect CSR Access (Smcsrind/Sscsrind)	February 2024	Smcsrind, Sscsrind	Privileged Horizontal Committee
RISC-V Integer Conditional (Zicond) operations extension	November 2023	Zicond	Unprivileged Horizontal Committee
Hardware Updating of PTE A/D Bits (Svadu)	November 2023	Svadu	Privileged Horizontal Committee
RISC-V Cycle and Instret Privilege Mode Filtering (Smcntrpmf)	November 2023	Smcntrpmf	Privileged Horizontal Committee
Atomic Compare-and-Swap (CAS) Instructions (Zacas)	November 2023	Zacas	Unprivileged Horizontal Committee
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
"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
“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
"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	Unprivileged Horizontal Committee
Zmmul Extension	June 2022	Zmmul	Unprivileged Horizontal Committee
PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp)	November 2021	Smepmp	Privileged Horizontal Committee
RISC-V Privileged Architecture 1.12	November 2021	Sm1p12, Ss1p12, Sv57, Hypervisor, Svinval, Svnapot, Svpbmt	Privileged Horizontal Committee
RISC-V Base Cache Management Operation ISA Extensions	November 2021	Zicbom, Zicbop, Zicboz	Unprivileged Horizontal Committee
RISC-V Bit-Manipulation ISA-extensions	November 2021	Zba, Zbb, Zbc, Zbs	Unprivileged Horizontal Committee
RISC-V Count Overflow and Mode-Based Filtering Extension	November 2021	Sscofpmf	Privileged Horizontal Committee
RISC-V Cryptography Extensions Volume I: Scalar & Entropy Source Instructions	November 2021	Zbkb, Zbkc, Zbkx, Zknd, Zkne, Zknh, Zksed, Zksh, Zkn, Zks, Zkt, Zk, Zkr	Unprivileged Horizontal Committee
RISC-V State Enable Extension	November 2021	Smstateen	Privileged Horizontal Committee
RISC-V "stimecmp / vstimecmp" Extension	November 2021	Sstc	Privileged Horizontal Committee
RISC-V Vector Extension	November 2021	Zve32x, Zve32f, Zve64x, Zve64f, Zve64d, Zve, Zvl32b, Zvl64b, Zvl128b, Zvl256b, Zvl512b, Zvl1024b, Zvl, Zv	Unprivileged Horizontal Committee
"Zfh" and "Zfhmin" Standard Extensions for Half-Precision Floating-Point	November 2021	Zfh, Zfhmin	Unprivileged Horizontal Committee
"Zfinx", "Zdinx", "Zhinx", "Zhinxmin": Standard Extensions for Floating-Point in Integer Registers	November 2021	Zfinx, Zdinx, Zhinx, Zhinxmin	Unprivileged Horizontal Committee
“Zihintpause” Pause Hint	February 2021	Zihintpause	Unprivileged Horizontal Committee

Non-ISA Specifications

These sections contain previous versions of non-ISA specifications.