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Overview
- This page only tracks ratified extensions and features that are specified by groups (TGs, HCs) of RISC-V International.
- The extensions and features are grouped by their specification's state (published, ratified, frozen).
- Published (official) specifications can be found here: https://riscv.org/technical/specifications/
- The main repository of the ISA specifications is: https://github.com/riscv/riscv-isa-manual
- The following wiki page lists all recently ratified extensions, that are not merged into the ISA specification yet: Ratified Extensions
- The Specification Status lists lists the specifications that are frozen and or ready for ratification
Table description
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| Extension | Spike | Qemu | Binutils | GCC | glibc | newlib | LLVM | OpenSBI | FreeBSD | Linux kernel | GDB |
|---|
| RV32I | upstream | upstream | upstream | upstream | upstream | upstream | upstream | upstream | not supported | upstream | upstream |
|---|
| RV64I | upstream | upstream | upstream | upstream | upstream | upstream | upstream | upstream | upstream | upstream | upstream |
|---|
| Big-endian support | upstream |
|
| upstream |
|
| not supported |
| not supported |
| upstream |
|---|
| M (Multiplication and Division) | upstream | upstream | upstream | upstream | n/a | n/a | upstream | n/a | n/a | n/a | upstream |
|---|
| A (Atomic) | upstream | upstream | upstream | upstream | n/a | n/a | upstream | upstream (atomics) | upstream (atomics) | upstream (atomics) | upstream |
|---|
| F (SP float) | upstream | upstream | upstream | upstream | upstream | upstream | upstream |
| upstream | upstream | upstream |
|---|
| D (DP float) | upstream | upstream | upstream | upstream | upstream | upstream | upstream |
| upstream | upstream | upstream |
|---|
| Q (QP float) |
|
| upstream |
|
|
| not supported |
| not supported |
| upstream |
|---|
| RVWMO | upstream (emulation is seq. consistent) | upstream (emulation is seq. consistent) | n/a | n/a | n/a | n/a | n/a | upstream (barriers and locks) | upstream (barriers and locks) | upstream (barriers and locks), but needs optimization | upstream |
|---|
| C (compressed) | upstream | upstream | upstream | upstream | n/a | n/a | upstream |
| upstream | upstream |
|
|---|
| Zifencei | upstream | upstream | upstream | upstream |
|
| not supported |
| upstream | upstream |
|
|---|
| Machine ISA: CSRs | upstream | upstream | upstream |
|
|
|
|
| n/a |
|
|
|---|
| Machine ISA: ECALL, EBREAK | upstream | upstream |
|
|
|
|
|
| upstream | upstream |
|
|---|
| Machine ISA: MRET/SRET/URET | upstream | upstream |
|
|
|
|
|
| n/a |
|
|
|---|
| Machine ISA: WFI | upstream | upstream |
|
|
|
|
|
| upstream | upstream |
|
|---|
| Machine ISA: PMP |
|
|
|
|
|
|
|
| n/a |
|
|
|---|
| Supervisor ISA: CSRs | upstream | upstream |
|
|
|
|
|
| upstream |
|
|
|---|
| Supervisor ISA: SFENCE.VMA | upstream | upstream |
|
|
|
|
|
| upstream | upstream |
|
|---|
| Supervisor ISA: Sv32, Sv39, Sv48 | upstream | upstream |
|
|
|
|
|
| Sv39 upstream | upstream (sv39) |
|
|---|
Unpublished ratified extensions
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GDB
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Specifications that are at least frozen
Extensions and features in the table below are either frozen or ready-for-ratificationratified, but not published in a consolidated RISC-V ISA specification document.
| Extension | Spike | Qemu | Binutils | GCC | glibc | newlib | LLVM | OpenSBI | FreeBSD | Linux kernel | GDB |
|---|
| Zihintpause | upstream | Mailpatch | upstream |
|
|
| upstream |
|
|
|
|
|---|
| Vector: |
|---|
Zvamo, Zvlsseg, Zvediv, Zvqmac, | Zve32x, Zve32f, Zve64x, Zve64f, Zve64d, |
|---|
Zvfh, Zve| Zvl*b, V | upstream | upstream | upstream |
|---|
(but v0.7.1)staging branch
upstream (but v0.7.1) |
|
| upstream | upstream (experimental,FP16 ABI not settled) | not supported |
|
|
| Bitmanip: Zba, Zbb, Zbc, Zbs | upstream | upstream |
|---|
Mailpatch (Zba, Zbb, Zbs, Zbp)staging branch | staging branchPR
|
|
| MC upstream |
| not supported |
|
|
| Half Width FP: Zfh, Zfhmin | upstream |
|---|
staging branch| upstream | upstream |
|
|
| upstream |
| not supported |
|
|
| ePMP: Smepmp | upstream | upstream(but 0.9.3) | upstream |
|
|
| PR |
| not supported |
|
|
|---|
| Scalar crypto: |
|---|
Zbkb| Zbkb, Zbkc, Zbkx, Zknd, Zkne, Zknh, Zksed, Zksh, Zkr, Zkt, Zkn, Zks, |
|---|
Zkt, , Zkrstaging branch| upstream | upstream | upstream(only minimal support and wait c-api merge) |
MC layer PR LLVM Intrinsic PR clang intrinsic |
|
| upstream |
| not used |
|
|
Priv 1.12:
Sm1-12, Ss1-12, Sv57 |
| upstream | upstream |
|
|
|
|
| not supported |
|
|
|---|
| CMO base: Zicbom, Zicbop, Zicboz |
|---|
staging branch | upstream | Mailpatch | upstream |
|
|
| PR,PR |
| not supported | dma-ops upstream (6.0) |
|
|---|
| Hypervisor: (H) | upstream | upstream |
|---|
dev branch| upstream | n/a | n/a | n/a |
| upstream | not supported | upstream (5.16) |
|
| State Enable: Smstateen | upstream | Mailpatch | upstream |
|
|
|
|
| not supported |
|
|
|---|
| Time compare: Sstc |
| Mailpatch | upstream |
|
|
|
|
| not supported |
|
|
|---|
| Counter overflow and filtering: Sscofmpf | PR | Mailpatch | upstream |
|
|
|
|
| not supported |
|
|
|---|
| Fast TLP invalidation: Svinval | upstream | upstream |
|---|
staging branch| upstream |
|
|
|
|
| not supported |
|
|
| NAPOT pages: Svnapot | upstream |
|---|
staging branch| upstream | upstream |
|
|
|
|
| not supported |
|
|
| Page-based memory types: Svpbmt | upstream |
|---|
staging branch | not supported | Code Size Reduction: Zcee | dev branch | dev branch | dev branch | dev branch | dev branchPacked SIMD: Zpn, Zpsfoperand, Zprvsfextra | v0.9.2)
PR | PR | not supported | Resumable Non-maskable Interrupts: Smrnmi | not supported| 5.19) |
|
| Core-local Interrupt Controller: CLINT | upstream | upstream |
|
|
|
|
|
| upstream | upstream (clocksource) |
|---|
Advanced Core-local Interrupt Controller: ACLINTZmmulnot supported | Patchwork | Mailpatch | Specifications that are at least frozen
Extensions and features in the table below are either frozen or ready-for-ratification.
Specifications that are at least stable
Note, that this section only lists specifications that are planned to be released in the near future, but are not frozen yet.
| Extension | Spike | Qemu | Binutils | GCC | glibc | newlib | LLVM | OpenSBI | FreeBSD | Linux kernel | GDB |
|---|
| psABI: Standard ABIs: ILP32, ILP32F, ILP32D, LP64, LP64F, LP64D, LP64Q | n/a | n/a | upstream | ilp32, ilp32f, ilp32d, lp64, lp64f, lp64d | ilp32, ilp32d, lp64, lp64d | ilp32, ilp32f, ilp32d, lp64, lp64f, lp64d | ilp32, ilp32d, lp64, lp64d | n/a | lp64, lp64d | n/a |
|
|---|
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| Extension | Spike | Qemu | Binutils | GCC | glibc | newlib | LLVM | OpenSBI | FreeBSD | Linux kernel | GDB |
|---|
| Embedded ABI: ILP32E, LP64E | n/a | n/a | upstream | upstream | not supported | upstream | not supported | n/a | n/a | n/a | not supported |
|---|
| Packed SIMD: Zpn, Zpsfoperand, Zbpbo, P | upstream( v0.9.2) | Mailpatch | PR (2.36-based) dev branch (master-based) | PR |
|
|
|
| not supported |
|
|
|---|
| Pointer masking: Zjpm |
|
|
|
|
|
|
|
| not supported |
|
|
|---|
| Resumable Non-maskable Interrupts: Smrnmi |
|
| dev branch |
|
|
|
|
| not supported |
|
|
|---|
| Advanced Core-local Interrupt Controller: ACLINT |
| upstream |
|
|
|
|
|
| not supported | Patchwork |
|
|---|
Gaps
- Vector Extension Intrinsics (specification exists, but not frozen)
- Vector Calling Convention (specification exists, but not frozen)
- Scalar Crypto Intrinsics