Changeset 90177 in webkit for trunk/Source/JavaScriptCore/jit/JSInterfaceJIT.h

Timestamp:

Jun 30, 2011, 4:08:11 PM (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

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/jit/JSInterfaceJIT.h (modified) (2 diffs)

trunk/Source/JavaScriptCore/jit/JSInterfaceJIT.h

@@ -277 +277 @@
         done.link(this);
         return notInt;
-    }    
+    }
+
 #endif
 
@@ -316 +317 @@
         return notNumber;
     }
-    
+
     ALWAYS_INLINE void JSInterfaceJIT::emitFastArithImmToInt(RegisterID)
     {