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 #if ENABLE(JIT)
  30
  31 #include "ClassInfo.h"
  32 #include "CodeLocation.h"
  33 #include "IndexingType.h"
  34 #include "JITStubRoutine.h"
  35 #include "Structure.h"
  36
  37 namespace JSC {
  38
  39 enum JITArrayMode {
  40     JITInt32,
  41     JITDouble,
  42     JITContiguous,
  43     JITArrayStorage,
  44     JITInt8Array,
  45     JITInt16Array,
  46     JITInt32Array,
  47     JITUint8Array,
  48     JITUint8ClampedArray,
  49     JITUint16Array,
  50     JITUint32Array,
  51     JITFloat32Array,
  52     JITFloat64Array
  53 };
  54
  55 inline bool isOptimizableIndexingType(IndexingType indexingType)
  56 {
  57     switch (indexingType) {
  58     case ALL_INT32_INDEXING_TYPES:
  59     case ALL_DOUBLE_INDEXING_TYPES:
  60     case ALL_CONTIGUOUS_INDEXING_TYPES:
  61     case ARRAY_WITH_ARRAY_STORAGE_INDEXING_TYPES:
  62         return true;
  63     default:
  64         return false;
  65     }
  66 }
  67
  68 inline bool hasOptimizableIndexingForClassInfo(const ClassInfo* classInfo)
  69 {
  70     return isTypedView(classInfo->typedArrayStorageType);
  71 }
  72
  73 inline bool hasOptimizableIndexing(Structure* structure)
  74 {
  75     return isOptimizableIndexingType(structure->indexingType())
  76         || hasOptimizableIndexingForClassInfo(structure->classInfo());
  77 }
  78
  79 inline JITArrayMode jitArrayModeForIndexingType(IndexingType indexingType)
  80 {
  81     switch (indexingType) {
  82     case ALL_INT32_INDEXING_TYPES:
  83         return JITInt32;
  84     case ALL_DOUBLE_INDEXING_TYPES:
  85         return JITDouble;
  86     case ALL_CONTIGUOUS_INDEXING_TYPES:
  87         return JITContiguous;
  88     case ARRAY_WITH_ARRAY_STORAGE_INDEXING_TYPES:
  89         return JITArrayStorage;
  90     default:
  91         CRASH();
  92         return JITContiguous;
  93     }
  94 }
  95
  96 inline JITArrayMode jitArrayModeForClassInfo(const ClassInfo* classInfo)
  97 {
  98     switch (classInfo->typedArrayStorageType) {
  99     case TypeInt8:
 100         return JITInt8Array;
 101     case TypeInt16:
 102         return JITInt16Array;
 103     case TypeInt32:
 104         return JITInt32Array;
 105     case TypeUint8:
 106         return JITUint8Array;
 107     case TypeUint8Clamped:
 108         return JITUint8ClampedArray;
 109     case TypeUint16:
 110         return JITUint16Array;
 111     case TypeUint32:
 112         return JITUint32Array;
 113     case TypeFloat32:
 114         return JITFloat32Array;
 115     case TypeFloat64:
 116         return JITFloat64Array;
 117     default:
 118         CRASH();
 119         return JITContiguous;
 120     }
 121 }
 122
 123 inline TypedArrayType typedArrayTypeForJITArrayMode(JITArrayMode mode)
 124 {
 125     switch (mode) {
 126     case JITInt8Array:
 127         return TypeInt8;
 128     case JITInt16Array:
 129         return TypeInt16;
 130     case JITInt32Array:
 131         return TypeInt32;
 132     case JITUint8Array:
 133         return TypeUint8;
 134     case JITUint8ClampedArray:
 135         return TypeUint8Clamped;
 136     case JITUint16Array:
 137         return TypeUint16;
 138     case JITUint32Array:
 139         return TypeUint32;
 140     case JITFloat32Array:
 141         return TypeFloat32;
 142     case JITFloat64Array:
 143         return TypeFloat64;
 144     default:
 145         CRASH();
 146         return NotTypedArray;
 147     }
 148 }
 149
 150 inline JITArrayMode jitArrayModeForStructure(Structure* structure)
 151 {
 152     if (isOptimizableIndexingType(structure->indexingType()))
 153         return jitArrayModeForIndexingType(structure->indexingType());
 154
 155     ASSERT(hasOptimizableIndexingForClassInfo(structure->classInfo()));
 156     return jitArrayModeForClassInfo(structure->classInfo());
 157 }
 158
 159 struct ByValInfo {
 160     ByValInfo() { }
 161
 162     ByValInfo(unsigned bytecodeIndex, CodeLocationJump badTypeJump, JITArrayMode arrayMode, int16_t badTypeJumpToDone, int16_t returnAddressToSlowPath)
 163         : bytecodeIndex(bytecodeIndex)
 164         , badTypeJump(badTypeJump)
 165         , arrayMode(arrayMode)
 166         , badTypeJumpToDone(badTypeJumpToDone)
 167         , returnAddressToSlowPath(returnAddressToSlowPath)
 168         , slowPathCount(0)
 169     {
 170     }
 171
 172     unsigned bytecodeIndex;
 173     CodeLocationJump badTypeJump;
 174     JITArrayMode arrayMode; // The array mode that was baked into the inline JIT code.
 175     int16_t badTypeJumpToDone;
 176     int16_t returnAddressToSlowPath;
 177     unsigned slowPathCount;
 178     RefPtr<JITStubRoutine> stubRoutine;
 179 };
 180
 181 inline unsigned getByValInfoBytecodeIndex(ByValInfo* info)
 182 {
 183     return info->bytecodeIndex;
 184 }
 185
 186 } // namespace JSC
 187
 188 #endif // ENABLE(JIT)
 189
 190 #endif // ByValInfo_h
 191