# Function core::arch::aarch64::__wfe

source · [−]

    pub unsafe fn __wfe()

🔬This is a nightly-only experimental API. (`stdsimd` #48556)
Available on AArch64 only.
Expand description

Generates a WFE (wait for event) hint instruction, or nothing.

The WFE instruction allows (but does not require) the processor to enter a low-power state until some event occurs such as a SEV being issued by another processor.