Changeset 90237 in webkit for trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86.h

Timestamp:

Jul 1, 2011, 9:33:46 AM (14 years ago)

Author:

[email protected]

Message:

2011-06-30 Oliver Hunt <​[email protected]>

Reviewed by Gavin Barraclough.

Add optimised paths for a few maths functions
​https://bugs.webkit.org/show_bug.cgi?id=63757

Relanding as a Mac only patch.

This adds specialised thunks for Math.abs, Math.round, Math.ceil,
Math.floor, Math.log, and Math.exp as they are apparently more
important in real web content than we thought, which is somewhat
mind-boggling. On average doubles the performance of the common
cases (eg. actually passing numbers in). They're not as efficient
as they could be, but this way gives them the most portability.

• assembler/MacroAssemblerARM.h: (JSC::MacroAssemblerARM::supportsDoubleBitops): (JSC::MacroAssemblerARM::andnotDouble):
• assembler/MacroAssemblerARMv7.h: (JSC::MacroAssemblerARMv7::supportsDoubleBitops): (JSC::MacroAssemblerARMv7::andnotDouble):
• assembler/MacroAssemblerMIPS.h: (JSC::MacroAssemblerMIPS::andnotDouble): (JSC::MacroAssemblerMIPS::supportsDoubleBitops):
• assembler/MacroAssemblerSH4.h: (JSC::MacroAssemblerSH4::supportsDoubleBitops): (JSC::MacroAssemblerSH4::andnotDouble):
• assembler/MacroAssemblerX86.h: (JSC::MacroAssemblerX86::supportsDoubleBitops):
• assembler/MacroAssemblerX86Common.h: (JSC::MacroAssemblerX86Common::andnotDouble):
• assembler/MacroAssemblerX86_64.h: (JSC::MacroAssemblerX86_64::supportsDoubleBitops):
• assembler/X86Assembler.h: (JSC::X86Assembler::andnpd_rr):
• create_hash_table:
• jit/SpecializedThunkJIT.h: (JSC::SpecializedThunkJIT::finalize): (JSC::SpecializedThunkJIT::callDoubleToDouble):
• jit/ThunkGenerators.cpp: (JSC::floorThunkGenerator): (JSC::ceilThunkGenerator): (JSC::roundThunkGenerator): (JSC::expThunkGenerator): (JSC::logThunkGenerator): (JSC::absThunkGenerator):
• jit/ThunkGenerators.h:

File:

• trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86.h (modified) (1 diff)

trunk/Source/JavaScriptCore/assembler/MacroAssemblerX86.h

@@ -167 +167 @@
     bool supportsFloatingPointTruncate() const { return m_isSSE2Present; }
     bool supportsFloatingPointSqrt() const { return m_isSSE2Present; }
+    bool supportsDoubleBitops() const { return m_isSSE2Present; }
 
 private: