Function kvarn::prelude::compact_str::core::arch::x86_64::_blsfill_u64

pub unsafe fn _blsfill_u64(x: u64) -> u64

Available on non-crate feature miri-test-libstd and x86-64 and non-x86 only.

Sets all bits of x below the least significant one.

If there is no set bit in x, it sets all the bits.