*Element) Select(a, b *Element, cond int) *Element { m := mask64Bits(cond) v.l0 = (m & a.l0) | (^m & b.l0) v.l1 = (m & a.l1) | (^m & b.l1) v.l2 = (m & a.l2) | (^m & b.l2) v.l3 = (m & a.l3) | (^m & b.l3) v.l4 = (m & a.l4) | (^m & b.l4) return v } // Swap swaps v and u if cond == 1 or leaves them unchanged if cond == 0, and returns v. func (v *Element) Swap(u *Element, cond int) { m := mask64Bits(cond) t := m & (v.l0 ^ u.l0) v.l0 ^= t u.l0 ^= t t = m & (v.l1 ^ u.l1) v.l1 ^= t u.l1 ^= t t = m & (v.l2 ^ u.l2)...

*Element) Select(a, b *Element, cond int) *Element { m := mask64Bits(cond) v.l0 = (m & a.l0) | (^m & b.l0) v.l1 = (m & a.l1) | (^m & b.l1) v.l2 = (m & a.l2) | (^m & b.l2) v.l3 = (m & a.l3) | (^m & b.l3) v.l4 = (m & a.l4) | (^m & b.l4) return v } // Swap swaps v and u if cond == 1 or leaves them unchanged if cond == 0, and returns v. func (v *Element) Swap(u *Element, cond int) { m := mask64Bits(cond) t := m & (v.l0 ^ u.l0) v.l0 ^= t u.l0 ^= t t = m & (v.l1 ^ u.l1) v.l1 ^= t u.l1 ^= t t = m & (v.l2 ^ u.l2)...