RFR(L) Valhalla support for AArch64 v.05

[Dmitry Samersoff]

Ioi,

I agree with you about value type pack/unpack logic.

I'm not sure that it's possible to put it to shared code completely, but
at least we can consider moving the entire pack/unpack logic into a
separate function and re-use it rather than duplicate code.


Anther (not-technical) thing, that simplify porting is mark CR, which
touches platform-specific code, with some specific label.

-Dmitry


Another (process) thing that can simplify porting is the CR tag, which
concerns the platform-specific code, a specific label.

On 27.06.19 19:09, Ioi Lam wrote:
> Hi Dmitry,
> 
> During the port, have you found anything that should be refactored and
> put into shared code?
> 
> One thing that I am thinking of doing is to refactor the code in
> macroAssembler_x86.cpp that deals with ValueTypePassFieldsAsArgs.
> Hopefully that will make the port to other architectures easier.
> 
> Thanks
> - Ioi
> 
> 
> On 6/27/19 12:43 AM, Dmitry Samersoff wrote:
>> Hello Everybody,
>>
>>
>> Please review v.05 of adding AArch64 support to lworld branch
>>
>> http://cr.openjdk.java.net/~dsamersoff/valhalla_lworld_aarch64/webrev.05/
>>
>> What was done:
>>
>>    Implemented Valhalla support for aarch64.
>>
>>    Support for ValueTypePassFieldsAsArgs and ValueTypeReturnedAsFields
>>    is not completed and is not included into this webrev
>>    to reduce review and rebasing efforts.
>>
>> Testing:
>>
>>     All tests in runtime/valhalla/valuetypes and in
>> compiler/valhalla/valuetypes/ are passed
>>
>>     compiler/valhalla/valuetypes/TestMethodHandles.java
>>     compiler/valhalla/valuetypes/TestBasicFunctionality.java
>>
>>     are passed after manually tweaking of output patterns, I have not
>> found a way to support both x86 and aarch64, so these tests remain
>> unchanged and run on x64 only.
>>
>>
>> -Dmitry
>