Elliptic Curve Cryptography Point Arithmetic Libraries Are there any libraries out there that perform ECC point arithmetic:adding,subtraction whether it be in C for micro controllers for VHDL for fpgas? Or to go further any libraries that perform ElGamal encryption/decryption?
Here is a github repository link with which you can implement ECC arithmetic
and a research paper which gives you some idea on how to implement a software library for ECC 

Hope this helps !