https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107240
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> --- So perhaps this needs instructions new on P8 (which fleshed out the integer support amongst other things, but that sounds relevant here?) Test that with { powerpc*-*-* && has_arch_pwr8 } or such? But please make sure this is the reason first :-)