A project may even go so far as to write different asm for the same ISA for different architectures in order to optimize for specific pipeline behavior or whatn

A project may even go so far as to write different asm for the same ISA for different architectures in order to optimize for specific pipeline behavior or whatnot https://github.com/z-classic/libgmp/tree/master/mpn/x86_64 https://github.com/z-classic/libgmp/tree/master/mpn/x86_64