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
37namespace JSC {
38
39enum 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
55inline 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
68inline bool hasOptimizableIndexingForClassInfo(const ClassInfo* classInfo)
69{
70    return isTypedView(classInfo->typedArrayStorageType);
71}
72
73inline bool hasOptimizableIndexing(Structure* structure)
74{
75    return isOptimizableIndexingType(structure->indexingType())
76        || hasOptimizableIndexingForClassInfo(structure->classInfo());
77}
78
79inline 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
96inline 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
123inline 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
150inline 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
159struct 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
181inline 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
192