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 Instructions

• C

  Compressed Instructions

• D

  Double-Precision Floating-Point

• F

  Single-Precision Floating-Point

• H

  Hypervisor

• I

  Base Integer ISA

• M

  Integer Multiply And Divide

• Q

  Quad-Precision Floating-Point

• S

  Supervisor Mode

• Sdext

  Debug

• Smdbltrp

  Double Trap In M-Mode

• Smrnmi

  Resumable Non-Maskable Interrupts

• Svinval

  Fine-Grained Address-Translation Cache Invalidation

• V

  Vector Operations

• Zaamo

  Load-Acquire/Store-Release Atomic Instructions

• Zabha

  Byte And Halfword Atomic Memory Operations

• Zacas

  Atomic Compare-And-Swap (CAS) Instructions

• Zalasr

  Atomic Load-Acquire And Store-Release

• Zalrsc

  Load-Reserved/Store-Conditional Instructions

• Zawrs

  Wait-On-Reservation-Set Instructions

• Zba

  Address Generation

• Zbb

  Basic Bit-Manipulation

• Zbc

  Carry-Less Multiplication

• Zbkb

  Bit-Manipulation For Cryptography

• Zbkx

  Crossbar Permutations

• Zbs

  Single-Bit Instructions

• Zcb

  Simple Code-Size Saving Instructions

• Zcd

  Compressed Double-Precision Floating-Point Loads/stores

• Zcf

  Compressed Single-Precision Floating-Point Loads/stores

• Zcmop

  Compressed May-Be-Operations

• Zcmp

  Complex PUSH/POP And Double Move

• Zcmt

  Table Jump

• Zfa

  Additional Floating-Point Instructions

• Zfbfmin

  Scalar BF16 Converts

• Zfh

  Half-Precision Floating Point

• Zicbom

  Cache-Block Management Instructions

• Zicbop

  Cache-Block Prefetch

• Zicboz

  Cache-Block Zero Instruction

• Zicfilp

  Landing Pad

• Zicfiss

  Shadow Stack

• Zicond

  Integer Conditional Operations

• Zicsr

  Control And Status Register Instructions

• Zifencei

  Instruction Fence

• Zihintntl

  Non-Temporal Locality Hints

• Zihintpause

  Pause Hint

• Zimop

  May-Be-Operations

• Zkn

  NIST Algorithm Suite

• Zknd

  NIST Suite: AES Decryption

• Zkne

  NIST Suite: AES Encryption

• Zknh

  NIST Suite: SHA2 Hashing

• Zks

  ShangMi Algorithm Suite

• Zvbb

  Vector Basic Bit-Manipulation

• Zvbc

  Vector Carryless Multiplication

• Zvfbfmin

  Vector BF16 Converts

• Zvfbfwma

  Vector BF16 Widening Mul-Add

• Zvkg

  Vector GCM/GMAC

• Zvkned

  NIST Suite: Vector AES Block Cipher

• Zvknha

  NIST Suite: Vector SHA-2 Secure Hash (SHA-256)

• Zvks

  ShangMi Algorithm Suite

Try the searchable instruction index.