2010-04-28 Oliver Hunt <oliver@apple.com>
Reviewed by Gavin Barraclough.
Add fast paths for Math.pow and Math.sqrt
https://bugs.webkit.org/show_bug.cgi?id=38294
Add specialized thunks for Math.pow and Math.sqrt.
This requires adding a sqrtDouble function to the MacroAssembler
and sqrtsd to the x86 assembler.
Math.pow is slightly more complicated, in that we have
to implement exponentiation ourselves rather than relying
on hardware support. The inline exponentiation is restricted
to positive integer exponents on a numeric base. Exponentiation
is finally performed through the "Exponentiation by Squaring"
algorithm.
* assembler/AbstractMacroAssembler.h:
(JSC::AbstractMacroAssembler::ImmPtr::ImmPtr):
* assembler/MacroAssemblerARM.h:
(JSC::MacroAssemblerARM::supportsFloatingPointSqrt):
(JSC::MacroAssemblerARM::loadDouble):
(JSC::MacroAssemblerARM::sqrtDouble):
* assembler/MacroAssemblerARMv7.h:
(JSC::MacroAssemblerARMv7::supportsFloatingPointSqrt):
(JSC::MacroAssemblerARMv7::sqrtDouble):
* assembler/MacroAssemblerX86.h:
(JSC::MacroAssemblerX86::loadDouble):
(JSC::MacroAssemblerX86::supportsFloatingPointSqrt):
* assembler/MacroAssemblerX86Common.h:
(JSC::MacroAssemblerX86Common::sqrtDouble):
* assembler/MacroAssemblerX86_64.h:
(JSC::MacroAssemblerX86_64::loadDouble):
(JSC::MacroAssemblerX86_64::supportsFloatingPointSqrt):
* assembler/X86Assembler.h:
(JSC::X86Assembler::):
(JSC::X86Assembler::movsd_mr):
(JSC::X86Assembler::sqrtsd_rr):
(JSC::X86Assembler::X86InstructionFormatter::twoByteOp):
(JSC::X86Assembler::X86InstructionFormatter::memoryModRM):
* create_hash_table:
* jit/JIT.h:
* jit/JITInlineMethods.h:
* jit/JITOpcodes.cpp:
* jit/JITStubs.h:
(JSC::JITThunks::ctiNativeCallThunk):
* jit/JSInterfaceJIT.h:
(JSC::JSInterfaceJIT::emitLoadDouble):
(JSC::JSInterfaceJIT::emitJumpIfImmediateNumber):
(JSC::JSInterfaceJIT::emitJumpIfNotImmediateNumber):
(JSC::JSInterfaceJIT::emitLoadInt32):
* jit/SpecializedThunkJIT.h:
(JSC::SpecializedThunkJIT::loadDoubleArgument):
(JSC::SpecializedThunkJIT::loadInt32Argument):
(JSC::SpecializedThunkJIT::returnJSValue):
(JSC::SpecializedThunkJIT::returnDouble):
(JSC::SpecializedThunkJIT::finalize):
* jit/ThunkGenerators.cpp:
(JSC::sqrtThunkGenerator):
(JSC::powThunkGenerator):
* jit/ThunkGenerators.h:
* runtime/Executable.h:
(JSC::NativeExecutable::NativeExecutable):
* runtime/JSFunction.cpp:
(JSC::JSFunction::JSFunction):
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@58469 268f45cc-cd09-0410-ab3c-d52691b4dbfc
19 files changed
