VGHSH.VV

Vector GCM Hash

VGHSH.VV vd, vs2, vs1

Performs GHASH multiply-add for AES-GCM.

Encoding

Binary Layout

1011001

31:25

vs2

24:20

vs1

19:15

010

14:12

vd

11:7

1110111

6:0

 

Format OPIVV

Opcode 0xB2002077

Extension Zvkg

Operands

• vd
  Accumulator
• vs2
  Hash Key
• vs1
  Data

Example

VGHSH.VV v1, v4, v2

Related

More in Zvkg

Reference

View in RISC-V Unprivileged ISA Specification ↗ RISC-V ISA Manual

Description

Performs a vectorised GHASH cryptographic round operation. Each element group undergoes one step of the cipher algorithm in parallel. See the Zvk vector crypto extension for full semantic details.

Operation

vd = GHASH_MulAdd(vd, vs1, vs2);