https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96791
--- Comment #21 from Peter Bergner <bergner at gcc dot gnu.org> --- (In reply to Segher Boessenkool from comment #20) > (In reply to Peter Bergner from comment #18) > > So why don't we default to the Altivec ABI with -m32 on cpus that have > > Altivec and VSX units??? > > History. I'm not sure all our ABIs are compatible with vectors enabled, > either. > > Since always, you have needed to use -mabi=altivec on 32-bit. So should we disable MMA for -m32, since we cannot rely on -mabi=altivec and hence vsx being enabled for -m32?