On Tue, 28 Mar 2023 at 22:57, Frederick Virchanza Gotham via Gcc-help <gcc-help@xxxxxxxxxxx> wrote: > > I want to fork the GNU g++ compiler and add a new integer type, __int256_t. > > Could someone please point me to the relevant files where __int128_t > is implemented? I've been searching the repository on Github but can't > find it. You should clone the repo and use git grep, not github's search. That will find it instantly. For github you need to search for the string "__int128_t" (with quotes). But __int128_t is just an implicitly-defined typedef, you probably want to add the actual types __int128 and unsigned __int128 instead. You want to search for INT_N and __intN to see how non-standard integer types are defined.
