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 #if ENABLE(DFG_JIT)
  30
  31 #include "DFGCommon.h"
  32 #include "DFGSlowPathGenerator.h"
  33 #include "DFGSpeculativeJIT.h"
  34 #include <wtf/Vector.h>
  35
  36 namespace JSC { namespace DFG {
  37
  38 class CallArrayAllocatorSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
  39 public:
  40     CallArrayAllocatorSlowPathGenerator(
  41         MacroAssembler::JumpList from, SpeculativeJIT* jit, P_JITOperation_EStZ function,
  42         GPRReg resultGPR, GPRReg storageGPR, Structure* structure, size_t size)
  43         : JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
  44         , m_function(function)
  45         , m_resultGPR(resultGPR)
  46         , m_storageGPR(storageGPR)
  47         , m_structure(structure)
  48         , m_size(size)
  49     {
  50         ASSERT(size < static_cast<size_t>(std::numeric_limits<int32_t>::max()));
  51         jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
  52     }
  53
  54 protected:
  55     virtual void generateInternal(SpeculativeJIT* jit) override
  56     {
  57         linkFrom(jit);
  58         for (unsigned i = 0; i < m_plans.size(); ++i)
  59             jit->silentSpill(m_plans[i]);
  60         jit->callOperation(m_function, m_resultGPR, m_structure, m_size);
  61         GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
  62         for (unsigned i = m_plans.size(); i--;)
  63             jit->silentFill(m_plans[i], canTrample);
  64         jit->m_jit.loadPtr(MacroAssembler::Address(m_resultGPR, JSObject::butterflyOffset()), m_storageGPR);
  65         jumpTo(jit);
  66     }
  67
  68 private:
  69     P_JITOperation_EStZ m_function;
  70     GPRReg m_resultGPR;
  71     GPRReg m_storageGPR;
  72     Structure* m_structure;
  73     size_t m_size;
  74     Vector<SilentRegisterSavePlan, 2> m_plans;
  75 };
  76
  77 class CallArrayAllocatorWithVariableSizeSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
  78 public:
  79     CallArrayAllocatorWithVariableSizeSlowPathGenerator(
  80         MacroAssembler::JumpList from, SpeculativeJIT* jit, P_JITOperation_EStZ function,
  81         GPRReg resultGPR, Structure* contiguousStructure, Structure* arrayStorageStructure, GPRReg sizeGPR)
  82         : JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
  83         , m_function(function)
  84         , m_resultGPR(resultGPR)
  85         , m_contiguousStructure(contiguousStructure)
  86         , m_arrayStorageStructure(arrayStorageStructure)
  87         , m_sizeGPR(sizeGPR)
  88     {
  89         jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
  90     }
  91
  92 protected:
  93     virtual void generateInternal(SpeculativeJIT* jit) override
  94     {
  95         linkFrom(jit);
  96         for (unsigned i = 0; i < m_plans.size(); ++i)
  97             jit->silentSpill(m_plans[i]);
  98         GPRReg scratchGPR = AssemblyHelpers::selectScratchGPR(m_sizeGPR);
  99         MacroAssembler::Jump bigLength = jit->m_jit.branch32(MacroAssembler::AboveOrEqual, m_sizeGPR, MacroAssembler::TrustedImm32(MIN_ARRAY_STORAGE_CONSTRUCTION_LENGTH));
 100         jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_contiguousStructure), scratchGPR);
 101         MacroAssembler::Jump done = jit->m_jit.jump();
 102         bigLength.link(&jit->m_jit);
 103         jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_arrayStorageStructure), scratchGPR);
 104         done.link(&jit->m_jit);
 105         jit->callOperation(m_function, m_resultGPR, scratchGPR, m_sizeGPR);
 106         GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
 107         for (unsigned i = m_plans.size(); i--;)
 108             jit->silentFill(m_plans[i], canTrample);
 109         jumpTo(jit);
 110     }
 111
 112 private:
 113     P_JITOperation_EStZ m_function;
 114     GPRReg m_resultGPR;
 115     Structure* m_contiguousStructure;
 116     Structure* m_arrayStorageStructure;
 117     GPRReg m_sizeGPR;
 118     Vector<SilentRegisterSavePlan, 2> m_plans;
 119 };
 120
 121 } } // namespace JSC::DFG
 122
 123 #endif // ENABLE(DFG_JIT)
 124
 125 #endif // DFGCallArrayAllocatorSlowPathGenerator_h
 126