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

1 ISA Specifications
- 1.1 The RISC-V Instruction Set Manual Volume I: Unprivileged ISA
- 1.2 The RISC-V Instruction Set Manual Volume II: Privileged Architecture
2 ISA Ratification Specifications
3 Non-ISA Specifications

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
20240411	Apr. 2024	Unprivileged Horizontal Committee	riscv/riscv-isa-manual
20191213	Dec. 2019	Unprivileged Horizontal Committee	riscv/riscv-isa-manual
2.2 (Creative Commons)	May 2017
2.1	May 2016
2.0	May 2014
Original	May 2011

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
20240411	Apr. 2024	Privileged Horizontal Committee	riscv/riscv-isa-manual
20211203	Dec. 2021	Privileged Horizontal Committee	riscv/riscv-isa-manual
1.11	June 2019
1.10	May 2017
1.9	July 2016
1.7	May 2015

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
Load/Store Pair for RV32 (Zilsd & Zclsd)	February 2025	Zilsd, Zclsd	Unprivileged Horizontal Committee	riscv-zilsd
RISC-V Control Transfer Records	November 2024	Smctr, Ssctr	Privileged Horizontal Committee	riscv-control-transfer-records
RISC-V Pointer Masking	October 2024	Smmpm, Smnpm, Ssnpm, Supm, Sspm	Privileged Horizontal Committee	riscv-j-extension
The RISC-V Instruction Set Manual Volume II: Privileged Architecture	October 2024	Sm1p13, Ss1p13	Privileged Horizontal Committee
Double Trap	August 2024	Ssdbltrp, Smdbltrp	Privileged Horizontal Committee	riscv-double-trap
RISC-V Quality-of-Service (QoS) Identifiers	June 2024	Ssqosid	Privileged Horizontal Committee	riscv-ssqosid
Obviating Memory-Management Instructions after Marking PTEs Valid	June 2024	Svvptc	Privileged Horizontal Committee	riscv-svvptc
Resumable Non-Maskable Interrupts	June 2024	Smrnmi	Privileged Horizontal Committee
Shadow Stacks and Landing Pads	June 2024	Zicfiss, Zicfilp	Unprivileged Horizontal Committee	riscv-cfi
BF16 Extensions	June 2024	Zfbfmin, Zvfbfmin, Zvfbfwma	Unprivileged Horizontal Committee	riscv-bfloat16
Zaamo and Zalrsc Extensions	April 2024	Zaamo, Zalrsc	Unprivileged Horizontal Committee	riscv-zaamo-zalrsc
B Standard Extension for Bit Manipulation Instructions	April 2024	B	Unprivileged Horizontal Committee	riscv-b
Byte and Halfword Atomic Memory Operations (Zabha)	April 2024	Zabha	Unprivileged Horizontal Committee	riscv-zabha
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	Unprivileged Horizontal Committee	riscv-zawrs
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	riscv-bitmanip
RISC-V Count Overflow and Mode-Based Filtering Extension	November 2021	Sscofpmf	Privileged Horizontal Committee	riscv-count-overflow
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	riscv-crypto
RISC-V State Enable Extension	November 2021	Smstateen	Privileged Horizontal Committee	riscv-state-enable
RISC-V "stimecmp / vstimecmp" Extension	November 2021	Sstc	Privileged Horizontal Committee	riscv-time-compare
RISC-V Vector Extension	November 2021	Zve32x, Zve32f, Zve64x, Zve64f, Zve64d, Zve, Zvl32b, Zvl64b, Zvl128b, Zvl256b, Zvl512b, Zvl1024b, Zvl, Zv	Unprivileged Horizontal Committee	riscv-v-spec
"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	riscv-zfinx
“Zihintpause” Pause Hint	February 2021	Zihintpause	Unprivileged Horizontal Committee

Non-ISA Specifications

These sections contain previous versions of non-ISA specifications.

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

Efficient Trace for RISC-V

Version	Published	Description	RISC-V Community	Source

Version	Published	Description	RISC-V Community	Source
1.0	June 2022	Specifies the ingress port (the signals between the RISC-V core and the encoder), compressed branch trace algorithm and the packet format used to encapsulate the compressed branch trace information.	SOC Infrastructure Horizontal Committee	riscv-non-isa/tech-trace-spec

RISC-V External Debug Specification

Version	Published	Description	RISC-V Community	Source

Version	Published	Description	RISC-V Community	Source
0.13.2	May 2019	Outlines a standard architecture for external debug support on RISC-V platforms.	SOC Infrastructure Horizontal Committee	riscv/tech-debug-spec

RISC-V Supervisor Binary Interface Specification

Version	Published	Description	RISC-V Community	Source

Version	Published	Description	RISC-V Community	Source
2.0.0	January 2024

RISC-V Technical Specifications Archive