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| author | Julien Brianceau <jbriance@cisco.com> | 2014-03-03 10:17:15 +0100 |
|---|---|---|
| committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-03-03 10:30:27 +0100 |
| commit | 7ca46bc34d194fe824f6474caf930b186bb98025 (patch) | |
| tree | 01b5612b3d26b355e75252400883e1b1f0dafd10 | |
| parent | e5b7eec29191033fd71a782c18f5d8437e52856e (diff) | |
| download | qtwebkit-7ca46bc34d194fe824f6474caf930b186bb98025.tar.gz | |
Use moveDoubleToInts in SpecializedThunkJIT::returnDouble for non-X86 JSVALUE32_64 ports.
https://bugs.webkit.org/show_bug.cgi?id=124936
Patch by Julien Brianceau <jbriance@cisco.com> on 2013-11-29
Reviewed by Zoltan Herczeg.
The moveDoubleToInts implementations in ARM, MIPS and SH4 macro assemblers do not clobber
src FPRegister and are likely to be more efficient than the current generic implementation
using the stack.
* jit/SpecializedThunkJIT.h:
(JSC::SpecializedThunkJIT::returnDouble):
Change-Id: Ie3b6516a4047717212521315e85f5e2094373cbc
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159873 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>
| -rw-r--r-- | Source/JavaScriptCore/jit/SpecializedThunkJIT.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/jit/SpecializedThunkJIT.h b/Source/JavaScriptCore/jit/SpecializedThunkJIT.h index 9a0e0a30e..6b09781a0 100644 --- a/Source/JavaScriptCore/jit/SpecializedThunkJIT.h +++ b/Source/JavaScriptCore/jit/SpecializedThunkJIT.h @@ -98,9 +98,14 @@ namespace JSC { move(tagTypeNumberRegister, regT0); done.link(this); #else +#if !CPU(X86) + // The src register is not clobbered by moveDoubleToInts with ARM, MIPS and SH4 macro assemblers, so let's use it. + moveDoubleToInts(src, regT0, regT1); +#else storeDouble(src, Address(stackPointerRegister, -(int)sizeof(double))); loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.tag) - sizeof(double)), regT1); loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.payload) - sizeof(double)), regT0); +#endif Jump lowNonZero = branchTestPtr(NonZero, regT1); Jump highNonZero = branchTestPtr(NonZero, regT0); move(TrustedImm32(0), regT0); |