High performance libraries do keep up with the new instructions, e.g. GMP[1] likes the new MULX[2] instruction a lot. [1]: https://gmplib.org/list-archives/gmp

High performance libraries do keep up with the new instructions, e.g. GMP[1] likes the new MULX[2] instruction a lot. [1]: https://gmplib.org/list-archives/gmp-devel/2013-August/003353.html https://gmplib.org/list-archives/gmp-devel/2013-August/00335... [2]: http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/ia-large-integer-arithmetic-paper.html http://www.intel.com/content/www/us/en/intelligent-systems/i...