Wait For Interrupt with Timeout is a hint instruction that indicates that the PE can enter a low-power state and remain there until either a local timeout event or a wakeup event occurs. For more information, see Wait For Interrupt.
As described in Wait For Interrupt, the execution of a WFIT instruction that would otherwise cause entry to a low-power state can be trapped to a higher Exception level.
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WFIT <Xt>
if !IsFeatureImplemented(FEAT_WFxT) then UNDEFINED; integer d = UInt(Rd);
integer localtimeout = UInt(X[d, 64]); if Halted() && ConstrainUnpredictableBool(Unpredictable_WFxTDEBUG) then EndOfInstruction(); Hint_WFI(localtimeout, WFxType_WFIT);
Internal version only: aarchmrs v2024-03_relA, pseudocode v2024-03_rel, sve v2024-03_rel ; Build timestamp: 2024-03-26T09:45
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