[llvm] r233693 - [AArch64] Add v8.1a "Rounding Double Multiply Add/Subtract" extension

[Tim Northover]

>> This way feel free to correct and commit the first two lines of this
>> test, so it would pass on your side.
>
> I don't know what you mean by this. I guess the invocations of llc need
> a triple, but I don't know what triple these pass with.

It's alright, I'll fix it up. In fact, r233709.

Tim.