[Bug target/123206] aarch64: Wrong gating of fp8 intrinsics in aarch64-simd-pragma-builtins.def

[acoplan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123206

--- Comment #2 from Alex Coplan <acoplan at gcc dot gnu.org> ---
Just FTR, these look to have been added by
r15-6469-gea66f57c9603312a8e4117b719d55becbc28ec43.  So we may want to consider
a backport to 15.  Not really a regression though as these were newly-added
intrinsics.