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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_COMPILER_ACCESS_BUILDER_H_ | 5 #ifndef V8_COMPILER_ACCESS_BUILDER_H_ |
6 #define V8_COMPILER_ACCESS_BUILDER_H_ | 6 #define V8_COMPILER_ACCESS_BUILDER_H_ |
7 | 7 |
8 #include "src/compiler/simplified-operator.h" | 8 #include "src/compiler/simplified-operator.h" |
9 | 9 |
10 namespace v8 { | 10 namespace v8 { |
11 namespace internal { | 11 namespace internal { |
12 namespace compiler { | 12 namespace compiler { |
13 | 13 |
14 // This access builder provides a set of static methods constructing commonly | 14 // This access builder provides a set of static methods constructing commonly |
15 // used FieldAccess and ElementAccess descriptors. These descriptors server as | 15 // used FieldAccess and ElementAccess descriptors. These descriptors server as |
16 // parameters to simplified load/store operators. | 16 // parameters to simplified load/store operators. |
17 class AccessBuilder : public AllStatic { | 17 class AccessBuilder : public AllStatic { |
18 public: | 18 public: |
| 19 // Provides access to HeapObject::map() field. |
| 20 static FieldAccess ForMap() { |
| 21 return {kTaggedBase, HeapObject::kMapOffset, Handle<Name>(), Type::Any(), |
| 22 kMachAnyTagged}; |
| 23 } |
| 24 |
| 25 // Provides access to JSObject::properties() field. |
| 26 static FieldAccess ForJSObjectProperties() { |
| 27 return {kTaggedBase, JSObject::kPropertiesOffset, Handle<Name>(), |
| 28 Type::Any(), kMachAnyTagged}; |
| 29 } |
| 30 |
19 // Provides access to JSObject::elements() field. | 31 // Provides access to JSObject::elements() field. |
20 static FieldAccess ForJSObjectElements() { | 32 static FieldAccess ForJSObjectElements() { |
21 return {kTaggedBase, JSObject::kElementsOffset, Handle<Name>(), | 33 return {kTaggedBase, JSObject::kElementsOffset, Handle<Name>(), |
22 Type::Internal(), kMachAnyTagged}; | 34 Type::Internal(), kMachAnyTagged}; |
23 } | 35 } |
24 | 36 |
| 37 // Provides access to JSArrayBuffer::backing_store() field. |
| 38 static FieldAccess ForJSArrayBufferBackingStore() { |
| 39 return {kTaggedBase, JSArrayBuffer::kBackingStoreOffset, Handle<Name>(), |
| 40 Type::UntaggedPtr(), kMachPtr}; |
| 41 } |
| 42 |
25 // Provides access to ExternalArray::external_pointer() field. | 43 // Provides access to ExternalArray::external_pointer() field. |
26 static FieldAccess ForExternalArrayPointer() { | 44 static FieldAccess ForExternalArrayPointer() { |
27 return {kTaggedBase, ExternalArray::kExternalPointerOffset, Handle<Name>(), | 45 return {kTaggedBase, ExternalArray::kExternalPointerOffset, Handle<Name>(), |
28 Type::UntaggedPtr(), kMachPtr}; | 46 Type::UntaggedPtr(), kMachPtr}; |
29 } | 47 } |
30 | 48 |
| 49 // Provides access to FixedArray elements. |
| 50 static ElementAccess ForFixedArrayElement() { |
| 51 return {kTaggedBase, FixedArray::kHeaderSize, Type::Any(), kMachAnyTagged}; |
| 52 } |
| 53 |
| 54 // TODO(mstarzinger): Raw access only for testing, drop me. |
| 55 static ElementAccess ForBackingStoreElement(MachineType rep) { |
| 56 return {kUntaggedBase, kNonHeapObjectHeaderSize - kHeapObjectTag, |
| 57 Type::Any(), rep}; |
| 58 } |
| 59 |
31 // Provides access to Fixed{type}TypedArray and External{type}Array elements. | 60 // Provides access to Fixed{type}TypedArray and External{type}Array elements. |
32 static ElementAccess ForTypedArrayElement(ExternalArrayType type, | 61 static ElementAccess ForTypedArrayElement(ExternalArrayType type, |
33 bool is_external) { | 62 bool is_external) { |
34 BaseTaggedness taggedness = is_external ? kUntaggedBase : kTaggedBase; | 63 BaseTaggedness taggedness = is_external ? kUntaggedBase : kTaggedBase; |
35 int header_size = is_external ? 0 : FixedTypedArrayBase::kDataOffset; | 64 int header_size = is_external ? 0 : FixedTypedArrayBase::kDataOffset; |
36 switch (type) { | 65 switch (type) { |
37 case kExternalInt8Array: | 66 case kExternalInt8Array: |
38 return {taggedness, header_size, Type::Signed32(), kMachInt8}; | 67 return {taggedness, header_size, Type::Signed32(), kMachInt8}; |
39 case kExternalUint8Array: | 68 case kExternalUint8Array: |
40 case kExternalUint8ClampedArray: | 69 case kExternalUint8ClampedArray: |
(...skipping 17 matching lines...) Expand all Loading... |
58 | 87 |
59 private: | 88 private: |
60 DISALLOW_COPY_AND_ASSIGN(AccessBuilder); | 89 DISALLOW_COPY_AND_ASSIGN(AccessBuilder); |
61 }; | 90 }; |
62 | 91 |
63 } // namespace compiler | 92 } // namespace compiler |
64 } // namespace internal | 93 } // namespace internal |
65 } // namespace v8 | 94 } // namespace v8 |
66 | 95 |
67 #endif // V8_COMPILER_ACCESS_BUILDER_H_ | 96 #endif // V8_COMPILER_ACCESS_BUILDER_H_ |
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