pub(crate) const fn fold_keys(bits: u64) -> [u64; 2]Expand description
The constants that fold a 128-bit accumulator forward by bits bits with two carry-less
multiplies: (x^(bits + 32), x^(bits - 32)) modulo p(x), reflected, as 33-bit values (the
K1..K4 of specialized/pclmulqdq.rs, which a test checks).