RFR: 8222825: ARM32 SIGILL issue on single core CPU (not supported PLDW instruction)

[David Holmes]

Changes pushed.

David

On 17/05/2019 8:16 am, dean.long at oracle.com wrote:
> Looks good.
> 
> dl
> 
> On 5/16/19 5:37 AM, Boris Ulasevich wrote:
>> Hi David, Dean,
>>
>> Yes. Thanks for waiting. I think two arm.ad rules are definitely 
>> better than one with incorrect print. Now arm.ad looks very similar to 
>> the state before removing obsolete AssumeMP option:
>>
>> http://cr.openjdk.java.net/~bulasevich/8222825/webrev.04.jdk-jdk
>>
>> thanks,
>> Boris
>>
>> On 16.05.2019 12:00, David Holmes wrote:
>>> Hi Boris,
>>>
>>> Waiting to see if you have any response to Dean's suggestion before I 
>>> push this for you.
>>>
>>> David
>>>
>>> On 14/05/2019 4:28 pm, dean.long at oracle.com wrote:
>>>> This looks good.  In arm.ad, you could use two rules and a 
>>>> predicate, so that the PrintOptoAssembly output is correct.
>>>>
>>>> dl
>>>>
>>>> On 5/13/19 11:04 PM, Boris Ulasevich wrote:
>>>>> Hi David,
>>>>>
>>>>>   It took a time to test the change :)
>>>>>   Yes, please. Thank you!
>>>>>
>>>>> Boris
>>>>>
>>>>> 14.05.2019 8:00, David Holmes пишет:
>>>>>> Hi Boris,
>>>>>>
>>>>>> I was wondering what had happened to this one :)
>>>>>>
>>>>>> Looks good! I can sponsor for you.
>>>>>>
>>>>>> Thanks,
>>>>>> David
>>>>>>
>>>>>> On 14/05/2019 2:45 pm, Boris Ulasevich wrote:
>>>>>>> Hi all,
>>>>>>>
>>>>>>> Please review the fix for SIGILL that happens on ARM32 CPU 
>>>>>>> without Multiprocessing Extensions support (this applies to 
>>>>>>> single-core arm32 processors, which are not very common this 
>>>>>>> days). With the fix we check PLDW instruction availability on JVM 
>>>>>>> start-up to correct further instructions generation.
>>>>>>>
>>>>>>> https://bugs.openjdk.java.net/browse/JDK-8222825
>>>>>>> http://cr.openjdk.java.net/~bulasevich/8222825/webrev.03.jdk-jdk
>>>>>>>
>>>>>>> thanks,
>>>>>>> Boris
>>>>>
>>>>>
>>>>
>