RFR(M): PPC64: improve array copy stubs by using vector instructions

[Lindenmaier, Goetz]

Hi Gustavo, 

thanks for contributing this optimization to the ppc port!

The change looks good, nice work.

Next time, please use correct subject in the RFR mail, the bugID is missing.
Also, address the RFR to everybody.  This one you addressed to Martin.
In general, you need several reviews.
Martin, thanks for reviewing though!

Martin, I think you can push this as it's ppc-only.

Best regards,
  Goetz.



> -----Original Message-----
> From: Gustavo Romero [mailto:gromero at linux.vnet.ibm.com]
> Sent: Montag, 23. Mai 2016 17:54
> To: Doerr, Martin <martin.doerr at sap.com>; ppc-aix-port-
> dev at openjdk.java.net; hotspot-dev at openjdk.java.net
> Cc: Simonis, Volker <volker.simonis at sap.com>; brenohl at br.ibm.com;
> Lindenmaier, Goetz <goetz.lindenmaier at sap.com>
> Subject: Re: RFR(M): PPC64: improve array copy stubs by using vector
> instructions
> 
> Hi Martin
> 
> Thank you for reviewing the change.
> 
> Best regards,
> Gustavo
> 
> On 23-05-2016 12:51, Doerr, Martin wrote:
> > Hi Gustavo,
> >
> > thanks for implementing it and taking care of my concerns. Looks good,
> now.
> > I will run tests and I can sponsor it after it was reviewed.
> >
> > Best regards,
> > Martin
> >
> > -----Original Message-----
> > From: Gustavo Romero [mailto:gromero at linux.vnet.ibm.com]
> > Sent: Montag, 23. Mai 2016 16:22
> > To: Doerr, Martin <martin.doerr at sap.com>; ppc-aix-port-
> dev at openjdk.java.net; hotspot-dev at openjdk.java.net
> > Cc: Simonis, Volker <volker.simonis at sap.com>; brenohl at br.ibm.com
> > Subject: RFR(M): PPC64: improve array copy stubs by using vector
> instructions
> >
> > Hi Martin
> >
> > Could you please host and review this webrev?
> >
> > Summary:
> >
> > * Add VSR registers to be used with VSX instruction set;
> > * Add VSX load/store instructions (lxvd2x/stxvd2x) to mass copy in
> >   the stub for disjoint short copy in order to improve it.
> >
> > http://81.de.7a9f.ip4.static.sl-reverse.com./8154156/9/v4/
> >
> > Thank you!
> >
> > Best regards,
> > Gustavo
> >