Page History

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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 On Deck Dashboards lists the specifications that are frozen and or ready for ratification

Table description

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Unpublished ratified extensions

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GDB

Unpublished ratified extensions

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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

V (vector): Zvamo, Zvlsseg, Zvediv, Zvqmac,

Zihintpause	upstream	Mailpatch	upstream				upstream
Vector: Zve32x, Zve32f, Zve64x, Zve64f, Zve64d,

Zvfh, Zve

Zvl*b, V	upstream	upstream

n

upstream

upstream (but v0.7.1)

rvv-next branch

upstream

upstream (experimental,FP16 ABI not settled)

B (bitmanip)

not supported
Bitmanip: Zba, Zbb, Zbc, Zbs	upstream	upstream	upstream	PR	dev branch		upstream	upstream (experimental)	not used
FP in INT regs: Zfinx, Zdinx, Zhinx, Zhinxmin	PR	upstream	upstream (Zfinx, Zdinx, Zhinx, Zhinxmin and unratified Zqinx)	Mailpatch (Zfinx,Zdinx)			MC upstream		not supported
Half Width FP: Zfh, Zfhmin	upstream	upstream	upstream				upstream		not supported
ePMP: Smepmp	upstream	upstream(but 0.9.3)	upstream				PR		not supported
Scalar crypto: Zbkb, Zbkc, Zbkx, Zknd, Zkne, Zknh, Zksed, Zksh, Zkr, Zkt, Zkn, Zks, Zk	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	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	upstream						not supported
NAPOT pages: Svnapot	upstream	upstream	upstream						not supported
Page-based memory types: Svpbmt	upstream	upstream	upstream						not supported	upstream (5.19)
Core-local Interrupt Controller: CLINT	upstream	upstream							upstream	upstream (clocksource)
Zmmul	upstream	upstream	upstream	Mailpatch			patch		n/a

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.

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Gaps

• Vector Extension Intrinsics (specification exists, but not frozen)
• Vector Calling Convention (specification exists, but not frozen)

To-do list

This is a temporary subsection that will disappear soon.

Gaps

• Vector Extension Intrinsics (specification exists, but not frozen)
• Vector Calling Convention (specification exists, but not frozen)
• Scalar Crypto Intrinsics