-/* Compute the affine coordinates x2, y2=z2 for the point (x1/z1) and (x2/x2) in
- * Montgomery projective coordinates.
- * Uses algorithm Mxy in appendix of
- * Lopex, J. and Dahab, R. "Fast multiplication on elliptic curves over
- * GF(2^m) without precomputation".
+/* Compute the x, y affine coordinates from the point (x1, z1) (x2, z2)
+ * using Montgomery point multiplication algorithm Mxy() in appendix of
+ * Lopez, J. and Dahab, R. "Fast multiplication on elliptic curves over
+ * GF(2^m) without precomputation" (CHES '99, LNCS 1717).