bytecode/ByValInfo.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 ByValInfo_h
  27 #define ByValInfo_h
  28
  29 #include <wtf/Platform.h>
  30
  31 #if ENABLE(JIT)
  32
  33 #include "ClassInfo.h"
  34 #include "CodeLocation.h"
  35 #include "IndexingType.h"
  36 #include "JITStubRoutine.h"
  37 #include "Structure.h"
  38
  39 namespace JSC {
  40
  41 enum JITArrayMode {
  42     JITInt32,
  43     JITDouble,
  44     JITContiguous,
  45     JITArrayStorage,
  46     JITInt8Array,
  47     JITInt16Array,
  48     JITInt32Array,
  49     JITUint8Array,
  50     JITUint8ClampedArray,
  51     JITUint16Array,
  52     JITUint32Array,
  53     JITFloat32Array,
  54     JITFloat64Array
  55 };
  56
  57 inline bool isOptimizableIndexingType(IndexingType indexingType)
  58 {
  59     switch (indexingType) {
  60     case ALL_INT32_INDEXING_TYPES:
  61     case ALL_DOUBLE_INDEXING_TYPES:
  62     case ALL_CONTIGUOUS_INDEXING_TYPES:
  63     case ARRAY_WITH_ARRAY_STORAGE_INDEXING_TYPES:
  64         return true;
  65     default:
  66         return false;
  67     }
  68 }
  69
  70 inline bool hasOptimizableIndexingForClassInfo(const ClassInfo* classInfo)
  71 {
  72     return classInfo->typedArrayStorageType != TypedArrayNone;
  73 }
  74
  75 inline bool hasOptimizableIndexing(Structure* structure)
  76 {
  77     return isOptimizableIndexingType(structure->indexingType())
  78         || hasOptimizableIndexingForClassInfo(structure->classInfo());
  79 }
  80
  81 inline JITArrayMode jitArrayModeForIndexingType(IndexingType indexingType)
  82 {
  83     switch (indexingType) {
  84     case ALL_INT32_INDEXING_TYPES:
  85         return JITInt32;
  86     case ALL_DOUBLE_INDEXING_TYPES:
  87         return JITDouble;
  88     case ALL_CONTIGUOUS_INDEXING_TYPES:
  89         return JITContiguous;
  90     case ARRAY_WITH_ARRAY_STORAGE_INDEXING_TYPES:
  91         return JITArrayStorage;
  92     default:
  93         CRASH();
  94         return JITContiguous;
  95     }
  96 }
  97
  98 inline JITArrayMode jitArrayModeForClassInfo(const ClassInfo* classInfo)
  99 {
 100     switch (classInfo->typedArrayStorageType) {
 101     case TypedArrayInt8:
 102         return JITInt8Array;
 103     case TypedArrayInt16:
 104         return JITInt16Array;
 105     case TypedArrayInt32:
 106         return JITInt32Array;
 107     case TypedArrayUint8:
 108         return JITUint8Array;
 109     case TypedArrayUint8Clamped:
 110         return JITUint8ClampedArray;
 111     case TypedArrayUint16:
 112         return JITUint16Array;
 113     case TypedArrayUint32:
 114         return JITUint32Array;
 115     case TypedArrayFloat32:
 116         return JITFloat32Array;
 117     case TypedArrayFloat64:
 118         return JITFloat64Array;
 119     default:
 120         CRASH();
 121         return JITContiguous;
 122     }
 123 }
 124
 125 inline JITArrayMode jitArrayModeForStructure(Structure* structure)
 126 {
 127     if (isOptimizableIndexingType(structure->indexingType()))
 128         return jitArrayModeForIndexingType(structure->indexingType());
 129
 130     ASSERT(hasOptimizableIndexingForClassInfo(structure->classInfo()));
 131     return jitArrayModeForClassInfo(structure->classInfo());
 132 }
 133
 134 struct ByValInfo {
 135     ByValInfo() { }
 136
 137     ByValInfo(unsigned bytecodeIndex, CodeLocationJump badTypeJump, JITArrayMode arrayMode, int16_t badTypeJumpToDone, int16_t returnAddressToSlowPath)
 138         : bytecodeIndex(bytecodeIndex)
 139         , badTypeJump(badTypeJump)
 140         , arrayMode(arrayMode)
 141         , badTypeJumpToDone(badTypeJumpToDone)
 142         , returnAddressToSlowPath(returnAddressToSlowPath)
 143         , slowPathCount(0)
 144     {
 145     }
 146
 147     unsigned bytecodeIndex;
 148     CodeLocationJump badTypeJump;
 149     JITArrayMode arrayMode; // The array mode that was baked into the inline JIT code.
 150     int16_t badTypeJumpToDone;
 151     int16_t returnAddressToSlowPath;
 152     unsigned slowPathCount;
 153     RefPtr<JITStubRoutine> stubRoutine;
 154 };
 155
 156 inline unsigned getByValInfoBytecodeIndex(ByValInfo* info)
 157 {
 158     return info->bytecodeIndex;
 159 }
 160
 161 } // namespace JSC
 162
 163 #endif // ENABLE(JIT)
 164
 165 #endif // ByValInfo_h
 166