RESOLVED FIXED 63893
Make "Add optimised paths for a few maths functions" work on Qt 
https://bugs.webkit.org/show_bug.cgi?id=63893
Summary Make "Add optimised paths for a few maths functions" work on Qt
Zoltan Herczeg
Reported 2011-07-04 01:38:36 PDT
Make it works!
Attachments
patch (3.04 KB, patch)
2011-07-04 02:00 PDT, Zoltan Herczeg 		no flags
DetailsFormatted DiffDiff
updated patch (2.84 KB, patch)
2011-07-05 02:23 PDT, Zoltan Herczeg 		no flags
DetailsFormatted DiffDiff
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Zoltan Herczeg
Comment 1 2011-07-04 02:00:08 PDT
Created attachment 99610 [details] patch
Gabor Loki
Comment 2 2011-07-04 02:10:18 PDT
Comment on attachment 99610 [details] patch View in context: https://bugs.webkit.org/attachment.cgi?id=99610&action=review > Source/JavaScriptCore/ChangeLog:8 > + Move the generated code to the .text section instead of .data section. Nice catch! Would it make sense to try this optimization on ARM?
Zoltan Herczeg
Comment 3 2011-07-04 06:32:07 PDT
> Would it make sense to try this optimization on ARM? We need to detect whether hard or softfp ABI is present. Hopefully the compiler will tell us...
Oliver Hunt
Comment 4 2011-07-04 09:26:46 PDT
Comment on attachment 99610 [details] patch View in context: https://bugs.webkit.org/attachment.cgi?id=99610&action=review > Source/JavaScriptCore/jit/ThunkGenerators.cpp:142 > + "jmp " SYMBOL_STRING_RELOCATION(function) "\n" \ Changing this to a jump will misalign the stack on x86_32/mac are you sure it's not complaining about it?
Zoltan Herczeg
Comment 5 2011-07-04 09:46:56 PDT
> Changing this to a jump will misalign the stack on x86_32/mac are you sure it's not complaining about it? Misalign? Why? Keeps 8 byte alignment, even if you don't push an extra 8 byte return address to it. Or is that 16 byte aligned? I don't know about mac ABI.
Oliver Hunt
Comment 6 2011-07-04 11:55:35 PDT
(In reply to comment #5) > > Changing this to a jump will misalign the stack on x86_32/mac are you sure it's not complaining about it? > > Misalign? Why? Keeps 8 byte alignment, even if you don't push an extra 8 byte return address to it. Or is that 16 byte aligned? I don't know about mac ABI. Mac ABI requires 16byte alignment
Zoltan Herczeg
Comment 7 2011-07-04 12:33:35 PDT
> Mac ABI requires 16byte alignment thanks for letting me know. Tomorrow I will put it back and resubmit the patch.
Zoltan Herczeg
Comment 8 2011-07-05 02:23:13 PDT
Created attachment 99685 [details] updated patch
Eric Seidel (no email)
Comment 9 2011-07-05 18:08:46 PDT
Seems reasonable to me, but the real JSC experts shoudl comment.
WebKit Review Bot
Comment 10 2011-07-05 18:20:39 PDT
Comment on attachment 99685 [details] updated patch Clearing flags on attachment: 99685 Committed r90425: <http://trac.webkit.org/changeset/90425>
WebKit Review Bot
Comment 11 2011-07-05 18:20:44 PDT
All reviewed patches have been landed. Closing bug.
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