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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_FIELD_INDEX_INL_H_ | 5 #ifndef V8_FIELD_INDEX_INL_H_ |
6 #define V8_FIELD_INDEX_INL_H_ | 6 #define V8_FIELD_INDEX_INL_H_ |
7 | 7 |
8 #include "src/field-index.h" | 8 #include "src/field-index.h" |
9 | 9 |
10 namespace v8 { | 10 namespace v8 { |
11 namespace internal { | 11 namespace internal { |
12 | 12 |
13 | 13 |
14 inline FieldIndex FieldIndex::ForInObjectOffset(int offset, Map* map) { | 14 inline FieldIndex FieldIndex::ForInObjectOffset(int offset, Map* map) { |
15 ASSERT((offset % kPointerSize) == 0); | 15 DCHECK((offset % kPointerSize) == 0); |
16 int index = offset / kPointerSize; | 16 int index = offset / kPointerSize; |
17 if (map == NULL) { | 17 if (map == NULL) { |
18 return FieldIndex(true, index, false, index + 1, 0, true); | 18 return FieldIndex(true, index, false, index + 1, 0, true); |
19 } | 19 } |
20 int first_inobject_offset = map->GetInObjectPropertyOffset(0); | 20 int first_inobject_offset = map->GetInObjectPropertyOffset(0); |
21 if (offset < first_inobject_offset) { | 21 if (offset < first_inobject_offset) { |
22 return FieldIndex(true, index, false, 0, 0, true); | 22 return FieldIndex(true, index, false, 0, 0, true); |
23 } else { | 23 } else { |
24 return FieldIndex::ForPropertyIndex(map, offset / kPointerSize); | 24 return FieldIndex::ForPropertyIndex(map, offset / kPointerSize); |
25 } | 25 } |
26 } | 26 } |
27 | 27 |
28 | 28 |
29 inline FieldIndex FieldIndex::ForPropertyIndex(Map* map, | 29 inline FieldIndex FieldIndex::ForPropertyIndex(Map* map, |
30 int property_index, | 30 int property_index, |
31 bool is_double) { | 31 bool is_double) { |
32 ASSERT(map->instance_type() >= FIRST_NONSTRING_TYPE); | 32 DCHECK(map->instance_type() >= FIRST_NONSTRING_TYPE); |
33 int inobject_properties = map->inobject_properties(); | 33 int inobject_properties = map->inobject_properties(); |
34 bool is_inobject = property_index < inobject_properties; | 34 bool is_inobject = property_index < inobject_properties; |
35 int first_inobject_offset; | 35 int first_inobject_offset; |
36 if (is_inobject) { | 36 if (is_inobject) { |
37 first_inobject_offset = map->GetInObjectPropertyOffset(0); | 37 first_inobject_offset = map->GetInObjectPropertyOffset(0); |
38 } else { | 38 } else { |
39 first_inobject_offset = FixedArray::kHeaderSize; | 39 first_inobject_offset = FixedArray::kHeaderSize; |
40 property_index -= inobject_properties; | 40 property_index -= inobject_properties; |
41 } | 41 } |
42 return FieldIndex(is_inobject, | 42 return FieldIndex(is_inobject, |
(...skipping 14 matching lines...) Expand all Loading... |
57 field_index = -(field_index + 1); | 57 field_index = -(field_index + 1); |
58 is_inobject = false; | 58 is_inobject = false; |
59 first_inobject_offset = FixedArray::kHeaderSize; | 59 first_inobject_offset = FixedArray::kHeaderSize; |
60 field_index += FixedArray::kHeaderSize / kPointerSize; | 60 field_index += FixedArray::kHeaderSize / kPointerSize; |
61 } else { | 61 } else { |
62 first_inobject_offset = map->GetInObjectPropertyOffset(0); | 62 first_inobject_offset = map->GetInObjectPropertyOffset(0); |
63 field_index += JSObject::kHeaderSize / kPointerSize; | 63 field_index += JSObject::kHeaderSize / kPointerSize; |
64 } | 64 } |
65 FieldIndex result(is_inobject, field_index, is_double, | 65 FieldIndex result(is_inobject, field_index, is_double, |
66 map->inobject_properties(), first_inobject_offset); | 66 map->inobject_properties(), first_inobject_offset); |
67 ASSERT(result.GetLoadByFieldIndex() == orig_index); | 67 DCHECK(result.GetLoadByFieldIndex() == orig_index); |
68 return result; | 68 return result; |
69 } | 69 } |
70 | 70 |
71 | 71 |
72 // Returns the index format accepted by the HLoadFieldByIndex instruction. | 72 // Returns the index format accepted by the HLoadFieldByIndex instruction. |
73 // (In-object: zero-based from (object start + JSObject::kHeaderSize), | 73 // (In-object: zero-based from (object start + JSObject::kHeaderSize), |
74 // out-of-object: zero-based from FixedArray::kHeaderSize.) | 74 // out-of-object: zero-based from FixedArray::kHeaderSize.) |
75 inline int FieldIndex::GetLoadByFieldIndex() const { | 75 inline int FieldIndex::GetLoadByFieldIndex() const { |
76 // For efficiency, the LoadByFieldIndex instruction takes an index that is | 76 // For efficiency, the LoadByFieldIndex instruction takes an index that is |
77 // optimized for quick access. If the property is inline, the index is | 77 // optimized for quick access. If the property is inline, the index is |
(...skipping 37 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
115 return GetLoadByFieldIndex(); | 115 return GetLoadByFieldIndex(); |
116 } else { | 116 } else { |
117 return property_index(); | 117 return property_index(); |
118 } | 118 } |
119 } | 119 } |
120 | 120 |
121 | 121 |
122 } } // namespace v8::internal | 122 } } // namespace v8::internal |
123 | 123 |
124 #endif | 124 #endif |
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