The point of a compiler, specifically the code-generator is to use the most effective instruction where applicable to get the job done. Its not necessary to hav

The point of a compiler, specifically the code-generator is to use the most effective instruction where applicable to get the job done. Its not necessary to have full coverage over the entire instruction set. Sometimes new and fancy instructions can end up being slower as opposed to using more but more standard "older" instructions to get the job done.