Changeset 94500 in webkit
- Timestamp:
- Sep 3, 2011 10:43:47 PM (13 years ago)
- Location:
- trunk/Source/JavaScriptCore
- Files:
-
- 2 edited
Legend:
- Unmodified
- Added
- Removed
-
trunk/Source/JavaScriptCore/ChangeLog
r94494 r94500 1 2011-09-03 Filip Pizlo <fpizlo@apple.com> 2 3 ThunkGenerators does not convert positive double zero into integer zero 4 https://bugs.webkit.org/show_bug.cgi?id=67553 5 6 Reviewed by Gavin Barraclough. 7 8 This is an 0.5% speed-up on V8 and neutral elsewhere. 9 10 * jit/SpecializedThunkJIT.h: 11 (JSC::SpecializedThunkJIT::returnDouble): 12 1 13 2011-09-03 Kevin Ollivier <kevino@theolliviers.com> 2 14 -
trunk/Source/JavaScriptCore/jit/SpecializedThunkJIT.h
r90237 r94500 96 96 #if USE(JSVALUE64) 97 97 moveDoubleToPtr(src, regT0); 98 Jump zero = branchTestPtr(Zero, regT0); 98 99 subPtr(tagTypeNumberRegister, regT0); 100 Jump done = jump(); 101 zero.link(this); 102 move(tagTypeNumberRegister, regT0); 103 done.link(this); 99 104 #else 100 105 storeDouble(src, Address(stackPointerRegister, -(int)sizeof(double))); 101 106 loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.tag) - sizeof(double)), regT1); 102 107 loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.payload) - sizeof(double)), regT0); 108 Jump lowNonZero = branchTestPtr(NonZero, regT1); 109 Jump highNonZero = branchTestPtr(NonZero, regT0); 110 move(TrustedImm32(0), regT0); 111 move(TrustedImm32(Int32Tag), regT1); 112 lowNonZero.link(this); 113 highNonZero.link(this); 103 114 #endif 104 115 loadPtr(payloadFor(RegisterFile::CallerFrame, callFrameRegister), callFrameRegister);
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