ge25519_double_scalarmult_precompute.S: Kaushik Nath
ge25519_double_scalarmult_process.S: Kaushik Nath
sc25519_barrett.S: Kaushik Nath
fe25519_{mul,square,nsquare,add,sub,freeze}.S: Kaushik Nath
mGnP.c: D. J. Bernstein
other code: see amd64-64-24k
