RFR 8135028 - support for vectorizing double precision sqrt

[Christian Thalinger]

> On Sep 8, 2015, at 7:39 AM, Berg, Michael C <michael.c.berg at intel.com> wrote:
> 
> I believe access is through Math.sqrt(…) for double precision, at least my test case follows that usage model.

Oh, the comment it talking about the “Java math library”.  Yeah, I don’t think we need that; it’s only confusing.

>  
> Thanks,
> -Michael
>  
> From: Christian Thalinger [mailto:christian.thalinger at oracle.com] 
> Sent: Tuesday, September 08, 2015 10:19 AM
> To: Berg, Michael C
> Cc: hotspot-compiler-dev at openjdk.java.net
> Subject: Re: RFR 8135028 - support for vectorizing double precision sqrt
>  
>  
> On Sep 4, 2015, at 10:34 AM, Berg, Michael C <michael.c.berg at intel.com <mailto:michael.c.berg at intel.com>> wrote:
>  
> Hi Vladimir, as requested I have made a separate review for the sqrt vector changes.
> 
> I would like to contribute support for vectorizing double precision sqrt on Intel architectures. I need two reviewers to examine this patch and comment as needed:
> 
> Bug-id: https://bugs.openjdk.java.net/browse/JDK-8135028 <https://bugs.openjdk.java.net/browse/JDK-8135028>  
> 
> webrev:
> http://cr.openjdk.java.net/~mcberg/8135028/webrev.01/ <http://cr.openjdk.java.net/~mcberg/8135028/webrev.01/>
>  
>  
> These changes are made to add support to vectorize double precision sqrt which is available through the math library in scalar form. 
>  
> The change looks good but I don’t understand the “math lib dependency” comments.
> 
> 
> The changes are for current and future Intel architectures.
>  
> Thanks,
> Michael

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