If you are looking for documentation about a recently ratified extension that is not yet merged into the published specifications listed at the RISC-V Specifications page, check the following table. Extensions with hyperlinks reflect specifications that are completely ratified by RISC-V but have not yet been merged into the final specifications. Extensions without links can be found in the published RISC-V ISA specifications on the RISC-V Specifications page.
A general overview and status of various extension that are presently under development can be be found at the Specification Status page.
Specification name | Ratification date | New extension(s) or Profile(s) |
|---|---|---|
August 2024 | Ssdbltrp, Smdbltrp | |
June 2024 | Ssqosid | |
Obviating Memory-Management Instructions after Marking PTEs Valid | June 2024 | Svvptc |
June 2024 | Smrnmi | |
June 2024 | Zicfiss, Zicfilp | |
June 2024 | Zfbfmin, Zvfbfmin, Zvfbfwma | |
April 2024 | Zaamo, Zalrsc | |
April 2024 | B | |
April 2024 | Zabha | |
RISC-V Supervisor Counter Delegation | March 2024 | Smcdeleg, Ssccfg |
May-Be-Operations | March 2024 | Zimop, Zcmop |
RISC-V Indirect CSR Access (Smcsrind/Sscsrind) | February 2024 | Smcsrind, Sscsrind |
RISC-V Integer Conditional (Zicond) operations extension | November 2023 | Zicond |
Hardware Updating of PTE A/D Bits (Svadu) | November 2023 | Svadu |
RISC-V Cycle and Instret Privilege Mode Filtering (Smcntrpmf) | November 2023 | Smcntrpmf |
Atomic Compare-and-Swap (CAS) Instructions (Zacas) | November 2023 | 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 |
"Zfa" Standard Extension for Additional Floating-Point Instructions | September 2023 | Zfa |
June 2023 | Smaia, Ssaia | |
“Zvfh/Zvfhmin:” Vector Extension for Half-Precision Floating-Point Arithmetic/Vector Extension for Minimal Half- | June 2023 | Zvfh, Zvfhmin |
“Zihintntl” Non-Temporal Locality Hints | May 2023 | Zihintntl |
RISC-V Code Size Reduction | April 2023 | Zca, Zcb, Zcd, Zce, Zcf, Zcmp, Zcmt |
RISC-V Profiles | March 2023 | RVA20, RVI20, RVA22 |
"Zicntr" and "Zihpm" Counters | March 2023 | Zicntr, Zihpm |
RV32E and RV64E Base Integer Instruction Sets | January 2023 | RV32E/RV64E |
“Ztso” Standard Extension for Total Store Ordering | January 2023 | Ztso |
RISC-V Wait-on-Reservation-Set (Zawrs) extension | November 2022 | Zawrs |
Zmmul Extension | June 2022 | Zmmul |
PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp) | November 2021 | Smepmp |
RISC-V Base Cache Management Operation ISA Extensions | November 2021 | Zicbom, Zicbop, Zicboz |
RISC-V Bit-Manipulation ISA-extensions | November 2021 | Zba, Zbb, Zbc, Zbs |
RISC-V Count Overflow and Mode-Based Filtering Extension | November 2021 | Sscofpmf |
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 |
RISC-V State Enable Extension | November 2021 | Smstateen |
RISC-V "stimecmp / vstimecmp" Extension | November 2021 | Sstc |
RISC-V Vector Extension | November 2021 | Zve32x, Zve32f, Zve64x, Zve64f, Zve64d, Zve, Zvl32b, Zvl64b, Zvl128b, Zvl256b, Zvl512b, Zvl1024b, Zvl, Zv |
The RISC-V Instruction Set Manual Volume II: Privileged Architecture | November 2021 | Sm1p12, Ss1p12, Sv57, Hypervisor, Svinval, Svnapot, Svpbmt |
"Zfh" and "Zfhmin" Standard Extensions for Half-Precision Floating-Point | November 2021 | Zfh, Zfhmin |
"Zfinx", "Zdinx", "Zhinx", "Zhinxmin": Standard Extensions for Floating-Point in Integer Registers | November 2021 | Zfinx, Zdinx, Zhinx, Zhinxmin |
“Zihintpause” Pause Hint | February 2021 | Zihintpause |
The RISC-V Instruction Set Manual Volume I: Unprivileged ISA | December 2019 | A, D, F, RV32I, RV64I, Zaamo, Zalrsc, Zicsr, Zifencei |
The RISC-V Instruction Set Manual Volume II: Privileged Architecture | December 2019 | C, M, Q, Sm1p11, Ss1p11, Sv32, Sv39, Sv48 |