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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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Extensions and features in the table below are ratified, 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 Zvestaging branch (Zfh only)Mailpatch (Zfhmin)
|
|
| upstream |
| not supported |
|
|
| ePMP: Smepmp | upstream | upstream(but 0.9.3) | upstream |
|---|
(CSR only; part of Priv 1.12 support) Zbkb| Zbkb, Zbkc, Zbkx, Zknd, Zkne, Zknh, Zksed, Zksh, Zkr, Zkt, Zkn, Zks, |
|---|
Zkt, , Zkr | upstream | upstream | upstream | upstream(only minimal support and wait c-api merge) |
|
| upstream |
| not used |
|
|
|---|
Priv 1.12:
Sm1-12, Ss1-12, Sv57 |
| upstream | upstream |
|
|
|
|
| not supported |
|
|
|---|
| CMO base: Zicbom, Zicbop, Zicboz | upstream | Mailpatch | upstream |
|
|
| PR,PR |
| not supported | dma-ops upstream (6.0) |
|
|---|
| Hypervisor: (H) | upstream | upstream | upstream |
|---|
(except handling as 'H' extension; now a part of 'I' extension) | n/a | n/a | n/a |
| upstream | not supported | upstream (5.16) |
|
| State Enable: Smstateen | upstream | Mailpatch |
|---|
Mailpatch| upstream |
|
|
|
|
| not supported |
|
|
| Time compare: Sstc |
| Mailpatch |
|---|
Mailpatch| upstream |
|
|
|
|
| not supported |
|
|
| Counter overflow and filtering: Sscofmpf | PR | Mailpatch | upstream |
|
|
|
|
| not supported |
|
|
|---|
| Fast TLP invalidation: Svinval | upstream | upstream | upstream |
|
|
|
|
| not supported |
|
|
|---|
| NAPOT pages: Svnapot | upstream | upstream | upstream |
|
|
|
|
| not supported |
|
|
|---|
| Page-based memory types: Svpbmt | upstream | upstream |
|---|
not supported | Code Size Reduction: Zcee | dev branch | dev branch | dev branch | dev branch | dev branch | Packed SIMD: Zpn, Zpsfoperand, Zprvsfextra | v0.9.2)
Mailpatch | 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: ACLINTZmmul | not supported | Patchwork | Mailpatch | Mailpatch | Pointer masking: Zjpm | not supported | Specifications that are at least frozen
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Specifications that are at least stable
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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