[Bug target/90984] PowerPC cast from vector unsigned long long to vector double does not do an integer to float conversion

[shawn at git dot icu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90984

--- Comment #2 from Shawn Landden <shawn at git dot icu> ---
It is also quite possible that this can't be changed now, because it could
break working programs.....