dfg/DFGCallArrayAllocatorSlowPathGenerator.h

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef DFGCallArrayAllocatorSlowPathGenerator_h
  27 #define DFGCallArrayAllocatorSlowPathGenerator_h
  28
  29 #include <wtf/Platform.h>
  30
  31 #if ENABLE(DFG_JIT)
  32
  33 #include "DFGCommon.h"
  34 #include "DFGSlowPathGenerator.h"
  35 #include "DFGSpeculativeJIT.h"
  36 #include <wtf/Vector.h>
  37
  38 namespace JSC { namespace DFG {
  39
  40 class CallArrayAllocatorSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
  41 public:
  42     CallArrayAllocatorSlowPathGenerator(
  43         MacroAssembler::JumpList from, SpeculativeJIT* jit, P_DFGOperation_EStZ function,
  44         GPRReg resultGPR, GPRReg storageGPR, Structure* structure, size_t size)
  45         : JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
  46         , m_function(function)
  47         , m_resultGPR(resultGPR)
  48         , m_storageGPR(storageGPR)
  49         , m_structure(structure)
  50         , m_size(size)
  51     {
  52         ASSERT(size < static_cast<size_t>(std::numeric_limits<int32_t>::max()));
  53         jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
  54     }
  55
  56 protected:
  57     void generateInternal(SpeculativeJIT* jit)
  58     {
  59         linkFrom(jit);
  60         for (unsigned i = 0; i < m_plans.size(); ++i)
  61             jit->silentSpill(m_plans[i]);
  62         jit->callOperation(m_function, m_resultGPR, m_structure, m_size);
  63         GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
  64         for (unsigned i = m_plans.size(); i--;)
  65             jit->silentFill(m_plans[i], canTrample);
  66         jit->m_jit.loadPtr(MacroAssembler::Address(m_resultGPR, JSObject::butterflyOffset()), m_storageGPR);
  67         jumpTo(jit);
  68     }
  69
  70 private:
  71     P_DFGOperation_EStZ m_function;
  72     GPRReg m_resultGPR;
  73     GPRReg m_storageGPR;
  74     Structure* m_structure;
  75     size_t m_size;
  76     Vector<SilentRegisterSavePlan, 2> m_plans;
  77 };
  78
  79 class CallArrayAllocatorWithVariableSizeSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
  80 public:
  81     CallArrayAllocatorWithVariableSizeSlowPathGenerator(
  82         MacroAssembler::JumpList from, SpeculativeJIT* jit, P_DFGOperation_EStZ function,
  83         GPRReg resultGPR, Structure* contiguousStructure, Structure* arrayStorageStructure, GPRReg sizeGPR)
  84         : JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
  85         , m_function(function)
  86         , m_resultGPR(resultGPR)
  87         , m_contiguousStructure(contiguousStructure)
  88         , m_arrayStorageStructure(arrayStorageStructure)
  89         , m_sizeGPR(sizeGPR)
  90     {
  91         jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
  92     }
  93
  94 protected:
  95     void generateInternal(SpeculativeJIT* jit)
  96     {
  97         linkFrom(jit);
  98         for (unsigned i = 0; i < m_plans.size(); ++i)
  99             jit->silentSpill(m_plans[i]);
 100         GPRReg scratchGPR = AssemblyHelpers::selectScratchGPR(m_sizeGPR);
 101         MacroAssembler::Jump bigLength = jit->m_jit.branch32(MacroAssembler::AboveOrEqual, m_sizeGPR, MacroAssembler::TrustedImm32(MIN_SPARSE_ARRAY_INDEX));
 102         jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_contiguousStructure), scratchGPR);
 103         MacroAssembler::Jump done = jit->m_jit.jump();
 104         bigLength.link(&jit->m_jit);
 105         jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_arrayStorageStructure), scratchGPR);
 106         done.link(&jit->m_jit);
 107         jit->callOperation(m_function, m_resultGPR, scratchGPR, m_sizeGPR);
 108         GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
 109         for (unsigned i = m_plans.size(); i--;)
 110             jit->silentFill(m_plans[i], canTrample);
 111         jumpTo(jit);
 112     }
 113
 114 private:
 115     P_DFGOperation_EStZ m_function;
 116     GPRReg m_resultGPR;
 117     Structure* m_contiguousStructure;
 118     Structure* m_arrayStorageStructure;
 119     GPRReg m_sizeGPR;
 120     Vector<SilentRegisterSavePlan, 2> m_plans;
 121 };
 122
 123 } } // namespace JSC::DFG
 124
 125 #endif // ENABLE(DFG_JIT)
 126
 127 #endif // DFGCallArrayAllocatorSlowPathGenerator_h
 128