The Best RISC-V Instruction Set Reference Manual

Browse the instruction set by extension. Pick an extension to see every instruction defined inside it.

The base integer I extension is the most widely implemented set of instructions. Start there if you're looking for the core ISA.

• B

  Bit Manipulation

• C

  Compressed Instructions

• D

  Double-Precision Floating Point

• F

  Single-Precision Floating Point

• H

  Hypervisor

• I

  Base Integer

• M

  Integer Multiply/Divide

• Q

  Quad-Precision Floating Point

• S

  Supervisor

• Sdext

  Supervisor Debug

• Smdbltrp

  Supervisor Multiple Double Trap

• Smrnmi

  Supervisor Recursive NMI

• Svinval

  Supervisor Virtual Invalidation

• V

  Vector

• Zaamo

  Atomics extensions

• Zabha

  Byte/Halfword Atomics

• Zacas

  Compare-and-Swap Atomics

• Zalasr

  Atomic Logical Shift Right

• Zalrsc

  Load-Reserved/Store-Conditional

• Zawrs

  Wait-on-Reservation-Set

• Zba

  Address Generation Bit-Manip

• Zbb

  Basic Bit-Manip

• Zbc

  Carry-Less Multiply

• Zbkb

  Bit-Manip Crypto B

• Zbkx

  Bit-Manip Crypto X

• Zbs

  Single-Bit Manipulation

• Zcb

  Compressed Bit-Manip

• Zcd

  Compressed Double

• Zcf

  Compressed Floating Point

• Zcmop

  Compressed Micro-Operations

• Zcmp

  Compressed Pair

• Zfa

  Vector Atomic Floating

• Zfbfmin

  Vector BF16 Min

• Zfh

  Half-Precision Floating Point

• Zicbom

  Cache Block Management

• Zicboz

  Zero Cache Block

• Zicfilp

  Fetch Line Prefetch

• Zicfiss

  Instruction Streaming

• Zicond

  Conditional Ops

• Zicsr

  CSR Instructions

• Zifencei

  Instruction-Fetch Fence

• Zimop

  Integer Multiply and Division Ops

• Zkn

  Scalar Cryptography

• Zknd

  NIST Suite: AES Decryption

• Zkne

  NIST Suite: AES Encryption

• Zknh

  NIST Suite: Hash

• Zks

  Scalar Crypto Suite

• Zvbb

  Vector Bitwise

• Zvbc

  Vector Carry-less Multiply

• Zvfbfmin

  Vector BF16 Min

• Zvfbfwma

  Vector BF16 Fused Multiply-Add

• Zvkg

  Vector Galois Field

• Zvkned

  Vector AES Decryption

• Zvknha

  Vector Hash

• Zvks

  Vector Crypto Suite