Function kvarn::prelude::compact_str::core::arch::x86_64::_tzmsk_u64

pub unsafe fn _tzmsk_u64(x: u64) -> u64

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

Sets all bits below the least significant one of x and clears all other bits.

If the least significant bit of x is 1, it returns zero.