RFR (M): 8036767 PPC64: Support for little endian execution model

[David Holmes]

On 26/02/2015 2:57 AM, Andrew Hughes wrote:
> ----- Original Message -----
>> I agreed with Volker, to the best of my knowledge AIX is Big Endian only
>> and I know of no plan to change that.
>>
>> Regards,
>> Tiago
>>
>> On Wed, 2015-02-25 at 16:25 +0100, Volker Simonis wrote:
>>> On Wed, Feb 25, 2015 at 2:50 PM, Andrew Hughes <gnu.andrew at redhat.com>
>>> wrote:
>>>> ----- Original Message -----
>>>>> On 2015-02-23 15:57, Erik Joelsson wrote:
>>>>>> I think the jdk changes with ppc64le as CPU make sense.
>>>>>
>>>>> Jumping in a bit late in the discussion...
>>>>>
>>>>> I agree with Erik, having ppc64le as CPU seems the right way to go. I'm
>>>>> just wondering if you have checked the makefiles if there are tests for
>>>>> ppc64 elsewhere that will now fail for ppc64le. I noticed that there was
>>>>> one such change in the configure script, but there might be more in the
>>>>> makefiles themselves.
>>>>>
>>>>> /Magnus
>>>>>
>>>>
>>>> These are the revised versions of the webrevs:
>>>>
>>>> http://cr.openjdk.java.net/~andrew/rh1191652/webrev.02/root/
>>>> http://cr.openjdk.java.net/~andrew/rh1191652/webrev.02/jdk/
>>>> http://cr.openjdk.java.net/~andrew/rh1191652/webrev.02/hotspot/
>>>>
>>>> (HotSpot is unchanged, dropped the sound changes from JDK)
>>>>
>>>> The only other ppc64 block I found is specifically AIX/ppc64 to exclude
>>>> the serviceability agent:
>>>>
>>>> make/gensrc/Gensrc-jdk.jdi.gmk:ifeq (, $(filter
>>>> $(OPENJDK_TARGET_OS)-$(OPENJDK_TARGET_CPU), aix-ppc64))
>>>> make/Import.gmk:ifeq (, $(filter
>>>> $(OPENJDK_TARGET_OS)-$(OPENJDK_TARGET_CPU), aix-ppc64))
>>>>
>>>> Does AIX support ppc64le?
>>>>
>>>
>>> To my best knowledge AIX neither supports ppc64le at the moment nor
>>> are there any plans to support it in the future.
>>>
>>> Regards,
>>> Volker
>>>
>>>> Thanks,
>>>> --
>>>> Andrew :)
>>>>
>>>> Free Java Software Engineer
>>>> Red Hat, Inc. (http://www.redhat.com)
>>>>
>>>> PGP Key: ed25519/35964222 (hkp://keys.gnupg.net)
>>>> Fingerprint = 5132 579D D154 0ED2 3E04  C5A0 CFDA 0F9B 3596 4222
>>>>
>>>> PGP Key: rsa4096/248BDC07 (hkp://keys.gnupg.net)
>>>> Fingerprint = EC5A 1F5E C0AD 1D15 8F1F  8F91 3B96 A578 248B DC07
>>>>
>>>
>>
>>
>>
>
> Thanks, that was my assumption. I did wonder if the lack of SA was
> AIX rather than AIX+PPC-specific and whether we could just drop the
> arch test altogether... But if someone does start building ppc64le+AIX,
> they'd find this issue straight away anyway.
>
> Ok if I push the jdk and root parts then? I think someone on the Oracle
> HS team (David?) needs to push the HotSpot bit.

Best to push it all together I think, which I can do through the hs-rt 
forest. But first I need to see where things settled with all this :) I 
was quite confused by some of the initial suggestions. Will try to get 
to this today.

David
-----


> Thanks,
>