https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120383
--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> --- On Sat, 24 May 2025, tnfchris at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120383 > > --- Comment #2 from Tamar Christina <tnfchris at gcc dot gnu.org> --- > (In reply to Richard Biener from comment #1) > > Sure, I'm OK with an optab for it. So it's like (half-type)((unsigned)(a + > > b) >> (sizeof(a)*4))? > > Yeah, and I was planning on if an optab was acceptable to also add a > vectorizer > pattern for it. > > It's a _hi/_lo instruction because of the narrowing. > > > Does the instruction also work for scalars? > > Only FPR scalars (as most of these complex instructions). For GPR scalar we > would have to emulate it. > > do you have a preference for the name btw? add_highpart maybe
