RFR(L): 8077838: Recent developments for ppc.
vladimir.kozlov at oracle.com
Thu Apr 23 14:38:59 UTC 2015
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:
> Best regards,
> -----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 vm_version_ppc.cpp:
> + a->vand(VR0, VR0, VR0); // code -> vand
> + a->lqarx_unchecked(R7, R3_ARG1, R4_ARG2, 1); // code -> lqarx_m
> + a->vcipher(VR0, VR1, VR2); // code -> vcipher
> Besides that, the change looks good.
> Thanks for taking the effort to do this change!
> On Wed, Apr 22, 2015 at 11:34 AM, Lindenmaier, Goetz
> <goetz.lindenmaier at sap.com> wrote:
>> this change contains recent changes in the ppc directory mostly made by SAP.
>> It's a ppc-only change.
>> - 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,
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