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
39namespace JSC {
40
41enum 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
57inline 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
70inline bool hasOptimizableIndexingForClassInfo(const ClassInfo* classInfo)
71{
72    return classInfo->typedArrayStorageType != TypedArrayNone;
73}
74
75inline bool hasOptimizableIndexing(Structure* structure)
76{
77    return isOptimizableIndexingType(structure->indexingType())
78        || hasOptimizableIndexingForClassInfo(structure->classInfo());
79}
80
81inline 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
98inline 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
125inline 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
134struct 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
156inline 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
167