// core::hint

#[non_exhaustive]
pub enum Locality {
    L3,
    L2.
    L1,
}


pub const fn prefetch_read<T>(ptr: *const T, locality: Locality);
pub const fn prefetch_write<T>(ptr: *mut T, locality: Locality);
pub const fn prefetch_read_non_temporal<T>(ptr: *const T, locality: Locality);
pub const fn prefetch_write_non_temporal<T>(ptr: *mut T, locality: Locality);
pub const fn prefetch_read_instruction<T>(ptr: *const T, locality: Locality);