[Bug target/93449] PPC: Missing conversion builtin from vector to _Decimal128 and vice versa

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93449

--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
[ Whoops, hit enter. ]

We need to have a C type for decimal integer before we can use that at all.