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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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_ELEMENTS_KIND_H_ | 5 #ifndef V8_ELEMENTS_KIND_H_ |
6 #define V8_ELEMENTS_KIND_H_ | 6 #define V8_ELEMENTS_KIND_H_ |
7 | 7 |
8 #include "src/checks.h" | 8 #include "src/checks.h" |
| 9 #include "src/ostreams.h" |
9 | 10 |
10 namespace v8 { | 11 namespace v8 { |
11 namespace internal { | 12 namespace internal { |
12 | 13 |
13 enum ElementsKind { | 14 enum ElementsKind { |
14 // The "fast" kind for elements that only contain SMI values. Must be first | 15 // The "fast" kind for elements that only contain SMI values. Must be first |
15 // to make it possible to efficiently check maps for this kind. | 16 // to make it possible to efficiently check maps for this kind. |
16 FAST_SMI_ELEMENTS, | 17 FAST_SMI_ELEMENTS, |
17 FAST_HOLEY_SMI_ELEMENTS, | 18 FAST_HOLEY_SMI_ELEMENTS, |
18 | 19 |
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67 const int kFastElementsKindCount = LAST_FAST_ELEMENTS_KIND - | 68 const int kFastElementsKindCount = LAST_FAST_ELEMENTS_KIND - |
68 FIRST_FAST_ELEMENTS_KIND + 1; | 69 FIRST_FAST_ELEMENTS_KIND + 1; |
69 | 70 |
70 // The number to add to a packed elements kind to reach a holey elements kind | 71 // The number to add to a packed elements kind to reach a holey elements kind |
71 const int kFastElementsKindPackedToHoley = | 72 const int kFastElementsKindPackedToHoley = |
72 FAST_HOLEY_SMI_ELEMENTS - FAST_SMI_ELEMENTS; | 73 FAST_HOLEY_SMI_ELEMENTS - FAST_SMI_ELEMENTS; |
73 | 74 |
74 int ElementsKindToShiftSize(ElementsKind elements_kind); | 75 int ElementsKindToShiftSize(ElementsKind elements_kind); |
75 int GetDefaultHeaderSizeForElementsKind(ElementsKind elements_kind); | 76 int GetDefaultHeaderSizeForElementsKind(ElementsKind elements_kind); |
76 const char* ElementsKindToString(ElementsKind kind); | 77 const char* ElementsKindToString(ElementsKind kind); |
77 void PrintElementsKind(FILE* out, ElementsKind kind); | |
78 | 78 |
79 ElementsKind GetInitialFastElementsKind(); | 79 ElementsKind GetInitialFastElementsKind(); |
80 | 80 |
81 ElementsKind GetFastElementsKindFromSequenceIndex(int sequence_number); | 81 ElementsKind GetFastElementsKindFromSequenceIndex(int sequence_number); |
82 int GetSequenceIndexFromFastElementsKind(ElementsKind elements_kind); | 82 int GetSequenceIndexFromFastElementsKind(ElementsKind elements_kind); |
83 | 83 |
84 ElementsKind GetNextTransitionElementsKind(ElementsKind elements_kind); | 84 ElementsKind GetNextTransitionElementsKind(ElementsKind elements_kind); |
85 | 85 |
86 inline bool IsDictionaryElementsKind(ElementsKind kind) { | 86 inline bool IsDictionaryElementsKind(ElementsKind kind) { |
87 return kind == DICTIONARY_ELEMENTS; | 87 return kind == DICTIONARY_ELEMENTS; |
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244 bool allow_only_packed) { | 244 bool allow_only_packed) { |
245 return IsFastElementsKind(elements_kind) && | 245 return IsFastElementsKind(elements_kind) && |
246 (elements_kind != TERMINAL_FAST_ELEMENTS_KIND && | 246 (elements_kind != TERMINAL_FAST_ELEMENTS_KIND && |
247 (!allow_only_packed || elements_kind != FAST_ELEMENTS)); | 247 (!allow_only_packed || elements_kind != FAST_ELEMENTS)); |
248 } | 248 } |
249 | 249 |
250 | 250 |
251 } } // namespace v8::internal | 251 } } // namespace v8::internal |
252 | 252 |
253 #endif // V8_ELEMENTS_KIND_H_ | 253 #endif // V8_ELEMENTS_KIND_H_ |
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