dfg/DFGSilentRegisterSavePlan.h

   1 /*
   2  * Copyright (C) 2012, 2013 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 DFGSilentRegisterSavePlan_h
  27 #define DFGSilentRegisterSavePlan_h
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "DFGCommon.h"
  32 #include "FPRInfo.h"
  33 #include "GPRInfo.h"
  34
  35 namespace JSC { namespace DFG {
  36
  37 enum SilentSpillAction {
  38     DoNothingForSpill,
  39     Store32Tag,
  40     Store32Payload,
  41     StorePtr,
  42     Store64,
  43     StoreDouble
  44 };
  45
  46 enum SilentFillAction {
  47     DoNothingForFill,
  48     SetInt32Constant,
  49     SetInt52Constant,
  50     SetStrictInt52Constant,
  51     SetBooleanConstant,
  52     SetCellConstant,
  53     SetTrustedJSConstant,
  54     SetJSConstant,
  55     SetJSConstantTag,
  56     SetJSConstantPayload,
  57     SetInt32Tag,
  58     SetCellTag,
  59     SetBooleanTag,
  60     SetDoubleConstant,
  61     Load32Tag,
  62     Load32Payload,
  63     Load32PayloadBoxInt,
  64     Load32PayloadConvertToInt52,
  65     Load32PayloadSignExtend,
  66     LoadPtr,
  67     Load64,
  68     Load64ShiftInt52Right,
  69     Load64ShiftInt52Left,
  70     LoadDouble,
  71     LoadDoubleBoxDouble,
  72     LoadJSUnboxDouble
  73 };
  74
  75 class SilentRegisterSavePlan {
  76 public:
  77     SilentRegisterSavePlan()
  78         : m_spillAction(DoNothingForSpill)
  79         , m_fillAction(DoNothingForFill)
  80         , m_register(-1)
  81         , m_node(0)
  82     {
  83     }
  84
  85     SilentRegisterSavePlan(
  86         SilentSpillAction spillAction,
  87         SilentFillAction fillAction,
  88         Node* node,
  89         GPRReg gpr)
  90         : m_spillAction(spillAction)
  91         , m_fillAction(fillAction)
  92         , m_register(gpr)
  93         , m_node(node)
  94     {
  95     }
  96
  97     SilentRegisterSavePlan(
  98         SilentSpillAction spillAction,
  99         SilentFillAction fillAction,
 100         Node* node,
 101         FPRReg fpr)
 102         : m_spillAction(spillAction)
 103         , m_fillAction(fillAction)
 104         , m_register(fpr)
 105         , m_node(node)
 106     {
 107     }
 108
 109     SilentSpillAction spillAction() const { return static_cast<SilentSpillAction>(m_spillAction); }
 110     SilentFillAction fillAction() const { return static_cast<SilentFillAction>(m_fillAction); }
 111
 112     Node* node() const { return m_node; }
 113
 114     GPRReg gpr() const { return static_cast<GPRReg>(m_register); }
 115     FPRReg fpr() const { return static_cast<FPRReg>(m_register); }
 116
 117 private:
 118     int8_t m_spillAction;
 119     int8_t m_fillAction;
 120     int8_t m_register;
 121     Node* m_node;
 122 };
 123
 124 } } // namespace JSC::DFG
 125
 126 #endif // ENABLE(DFG_JIT)
 127
 128 #endif // DFGSilentRegisterSavePlan_h
 129