x * y, and returns v. func (v *Element) Multiply(x, y *Element) *Element { feMul(v, x, y) return v } // Square sets v = x * x, and returns v. func (v *Element) Square(x *Element) *Element { feSquare(v, x) return v } // Mult32 sets v = x * y, and returns v. func (v *Element) Mult32(x *Element, y uint32) *Element { x0lo, x0hi := mul51(x.l0, y) x1lo, x1hi := mul51(x.l1, y) x2lo, x2hi := mul51(x.l2, y) x3lo, x3hi := mul51(x.l3, y) x4lo, x4hi := mul51(x.l4, y) v.l0 = x0lo + 19*x4hi // carried over per...