[Webkit-unassigned] [Bug 101328] MIPS DFG implementation.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=101328


Filip Pizlo <fpizlo at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #181319|review?, commit-queue?      |review-, commit-queue-
               Flag|                            |




--- Comment #22 from Filip Pizlo <fpizlo at apple.com>  2013-01-07 11:06:36 PST ---
(From update of attachment 181319)
View in context: https://bugs.webkit.org/attachment.cgi?id=181319&action=review

>>>> Source/JavaScriptCore/dfg/DFGCCallHelpers.h:963
>>>> +
>>> 
>>> Why is all of this behind CPU(MIPS)?  It looks identical to the normal NUMBER_OF_ARGUMENT_REGISTERS == 4 case. :-/
>> 
>> Thank you for the review. On MIPS we have to give space for the register stored arguments on stack also so while other (params in 4 regs) arches can use:
>>         poke(arg5, 1);
>>         poke(arg4);
>>         setupArgumentsWithExecState(arg1, arg2, arg3);
>> on MIPS we have to use:
>>         poke(arg5, 5);
>>         poke(arg4, 4);
>>         setupArgumentsWithExecState(arg1, arg2, arg3);
>> Different stack offset values in poke call.
> 
> Then I would suggest abstracting the poke offset, and using #if's only for that.  That way, you don't have to duplicate all of that code!
> 
> Keep in mind that this code gets churned *a lot*.  Every time we add a DFGOperations function with a sufficiently exotic signature, this code gets touched.  Therefore, we should reduce code duplication as much as possible; otherwise you guys will have a lot more work to do to keep up with DFG changes.

See above comment.  I still think you should abstract the poke offset rather than duplicating all of this code.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.