[vector] RFR (L): Generalized intrinsics for vector operations (first batch)

[Paul Sandoz]

> On Feb 13, 2018, at 8:17 AM, Vladimir Ivanov <vladimir.x.ivanov at oracle.com> wrote:
> 
> After thinking about it a bit more, I decided to keep casts & intrinsic calls separate:
> http://cr.openjdk.java.net/~vlivanov/panama/vector.generalized_intrinsics/webrev.06.cast/
> 

Ok, +1, easier to read.

Paul.

> Also, added missing null checks on Mask-related operations.
> 
> Let me know what do you think about new shape.
> 
> Best regards,
> Vladimir Ivanov
>