https://bugs.webkit.org/show_bug.cgi?id=79617

Reviewed by Filip Pizlo.

Add an ArithNegate op to the DFG JIT, to implement op_negate.

This patch also adds support for op_negate to the JSVALUE64 baseline JIT
(JSVALUE32_64 already had this), so that we can profile the slowpath usage.

This is a 2.5%-3% Sunspider progression and a 1% win on Kraken.

* assembler/ARMv7Assembler.h:
(JSC::ARMv7Assembler::sub_S):
    - Added sub_S from immediate.
(ARMv7Assembler):
(JSC::ARMv7Assembler::vneg):
    - Added double negate.
* assembler/MacroAssemblerARMv7.h:
(JSC::MacroAssemblerARMv7::negateDouble):
    - Added double negate.
(MacroAssemblerARMv7):
(JSC::MacroAssemblerARMv7::branchNeg32):
    - Added.
* assembler/MacroAssemblerX86.h:
(MacroAssemblerX86):
    - moved loadDouble, absDouble to common.
* assembler/MacroAssemblerX86Common.h:
(MacroAssemblerX86Common):
(JSC::MacroAssemblerX86Common::absDouble):
    - implementation can be shared.
(JSC::MacroAssemblerX86Common::negateDouble):
    - Added.
(JSC::MacroAssemblerX86Common::loadDouble):
    - allow absDouble to have a common implementation.
* assembler/MacroAssemblerX86_64.h:
(MacroAssemblerX86_64):
    - moved loadDouble, absDouble to common.
* dfg/DFGAbstractState.cpp:
(JSC::DFG::AbstractState::execute):
    - support ArithNegate.
* dfg/DFGArithNodeFlagsInferencePhase.cpp:
(JSC::DFG::ArithNodeFlagsInferencePhase::propagate):
    - support ArithNegate.
* dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::makeSafe):
    - support ArithNegate.
(JSC::DFG::ByteCodeParser::parseBlock):
    - support op_negate.
* dfg/DFGCSEPhase.cpp:
(JSC::DFG::CSEPhase::performNodeCSE):
    - support ArithNegate.
* dfg/DFGCapabilities.h:
(JSC::DFG::canCompileOpcode):
    - support op_negate.
* dfg/DFGGraph.h:
(JSC::DFG::Graph::negateShouldSpeculateInteger):
    - support ArithNegate.
* dfg/DFGNode.h:
(JSC::DFG::Node::hasArithNodeFlags):
    - support ArithNegate.
* dfg/DFGPredictionPropagationPhase.cpp:
(JSC::DFG::PredictionPropagationPhase::propagate):
    - support ArithNegate.
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compileArithNegate):
    - support ArithNegate.
* dfg/DFGSpeculativeJIT.h:
(SpeculativeJIT):
    - support ArithNegate.
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
    - support ArithNegate.
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
    - support ArithNegate.
* jit/JIT.cpp:
(JSC::JIT::privateCompileMainPass):
(JSC::JIT::privateCompileSlowCases):
    - Add support for op_negate in JSVALUE64.
* jit/JITArithmetic.cpp:
(JSC::JIT::emit_op_negate):
(JSC::JIT::emitSlow_op_negate):
    - Add support for op_negate in JSVALUE64.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@109038 268f45cc-cd09-0410-ab3c-d52691b4dbfc