RFR(L): 8077838: Recent developments for ppc. (original) (raw)

Vladimir Kozlov vladimir.kozlov at oracle.com
Thu Apr 23 14:38:59 UTC 2015

Good.

Thanks, Vladimir

On 4/23/15 5:56 AM, Lindenmaier, Goetz wrote:

Thanks fort he review, Volker!

I updated the webrev with your and Vladimir's proposals: http://cr.openjdk.java.net/~goetz/webrevs/8077838-ppc/webrev.02/ Best regards, Goetz. -----Original Message----- From: Volker Simonis [mailto:volker.simonis at gmail.com] Sent: Donnerstag, 23. April 2015 14:34 To: Lindenmaier, Goetz Cc: hotspot-dev at openjdk.java.net; ppc-aix-port-dev at openjdk.java.net Subject: Re: RFR(L): 8077838: Recent developments for ppc. Hi Goetz, this change is huge and not easy to review:) So far I only found one mis-aligned comment in vmversionppc.cpp: + a->vand(VR0, VR0, VR0); // code[8] -> vand + a->lqarxunchecked(R7, R3ARG1, R4ARG2, 1); // code[9] -> lqarxm + a->vcipher(VR0, VR1, VR2); // code[10] -> vcipher Besides that, the change looks good. Thanks for taking the effort to do this change! Regards, Volker On Wed, Apr 22, 2015 at 11:34 AM, Lindenmaier, Goetz <goetz.lindenmaier at sap.com> wrote: Hi,

this change contains recent changes in the ppc directory mostly made by SAP. It's a ppc-only change. http://cr.openjdk.java.net/~goetz/webrevs/8077838-ppc/webrev.01/ - Recognition of Power 8 processors (by Tiago Sturmer Daitx). - Support for more new Power 8 instructions. - Support for transactional memory. This is implemented but not yet tested thoroughly due to limitiations of the OS support. Not enabled. - java.lang.math.*Exact intrinsics - Some C2 optimizations and fixes: * Handling of flag registers. Some instructions would lead to uncompilable methods due to not allocatable register patterns. * Free some integer registers to use them for allocation. Handle compressed oops base as constant. * Unscaled class compression. - Type profiling fixes. Please review this change. Best regards, Goetz.

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