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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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