pub fn checked_write_8(
ptr: *mut MaybeUninit<u64>,
val: MaybeUninit<u64>,
) -> Option<()>Available on (x86 or x86-64) and crate feature
full only.pub fn checked_write_8(
ptr: *mut MaybeUninit<u64>,
val: MaybeUninit<u64>,
) -> Option<()>full only.