WFI

Wait for interrupt

This instruction is a hint instruction that indicates that the PE can enter a low-power state and remain there until a wakeup event occurs. For more information, see Wait For Interrupt.

As described in Wait For Interrupt, the execution of a WFI instruction that would otherwise cause entry to a low-power state can be trapped to a higher Exception level.

313029282726252423222120191817161514131211109876543210
11010101000000110010000001111111
CRmop2

Encoding

WFI

Decode for this encoding

// Empty.

Operation

Hint_WFI();


Internal version only: aarchmrs v2025-03_rel, pseudocode v2025-03_rel ; Build timestamp: 2025-03-21T17:41

Copyright © 2010-2025 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.