VAMOADDW.V

Vector Atomic Add Word

VAMOADDW.V vd, (rs1), vs2, vm

Atomically adds elements from vs2 to memory addresses in rs1 (indexed by vs2? No, rs1 is base, vs2 is index).

Encoding

Binary Layout

000001

31:26

00000

25:21

vm

20

rs1

19:15

110

14:12

vd

11:7

0101111

6:0

 

Format VAMO

Opcode 0x0000602F

Extension Zvamo (draft)

Operands

• vd
  Dest (Old Val)
• rs1
  Base
• vs2
  Index

Example

VAMOADDW.V v1, a0, v4, v0.t

Related

More in Zvamo (draft)

Reference

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

Description

Vector Atomic Add Word: Atomically adds elements from vs2 to memory addresses in rs1 (indexed by vs2? No, rs1 is base, vs2 is index). Operation: AtomicAdd(rs1 + vs2[i], vd[i]);.

Operation

AtomicAdd(rs1 + vs2[i], vd[i]);