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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 // Classes that describe assembly patterns as used by inline caches. | 4 // Classes that describe assembly patterns as used by inline caches. |
5 | 5 |
6 #ifndef RUNTIME_VM_INSTRUCTIONS_ARM_H_ | 6 #ifndef RUNTIME_VM_INSTRUCTIONS_ARM_H_ |
7 #define RUNTIME_VM_INSTRUCTIONS_ARM_H_ | 7 #define RUNTIME_VM_INSTRUCTIONS_ARM_H_ |
8 | 8 |
9 #ifndef RUNTIME_VM_INSTRUCTIONS_H_ | 9 #ifndef RUNTIME_VM_INSTRUCTIONS_H_ |
10 #error Do not include instructions_arm.h directly; use instructions.h instead. | 10 #error Do not include instructions_arm.h directly; use instructions.h instead. |
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40 // Decodes a load sequence ending at 'end' (the last instruction of the | 40 // Decodes a load sequence ending at 'end' (the last instruction of the |
41 // load sequence is the instruction before the one at end). Returns the | 41 // load sequence is the instruction before the one at end). Returns the |
42 // address of the first instruction in the sequence. Returns the register | 42 // address of the first instruction in the sequence. Returns the register |
43 // being loaded and the index in the pool being read from in the output | 43 // being loaded and the index in the pool being read from in the output |
44 // parameters 'reg' and 'index' respectively. | 44 // parameters 'reg' and 'index' respectively. |
45 static uword DecodeLoadWordFromPool(uword end, | 45 static uword DecodeLoadWordFromPool(uword end, |
46 Register* reg, | 46 Register* reg, |
47 intptr_t* index); | 47 intptr_t* index); |
48 }; | 48 }; |
49 | 49 |
50 | |
51 class CallPattern : public ValueObject { | 50 class CallPattern : public ValueObject { |
52 public: | 51 public: |
53 CallPattern(uword pc, const Code& code); | 52 CallPattern(uword pc, const Code& code); |
54 | 53 |
55 RawICData* IcData(); | 54 RawICData* IcData(); |
56 | 55 |
57 RawCode* TargetCode() const; | 56 RawCode* TargetCode() const; |
58 void SetTargetCode(const Code& code) const; | 57 void SetTargetCode(const Code& code) const; |
59 | 58 |
60 private: | 59 private: |
61 const ObjectPool& object_pool_; | 60 const ObjectPool& object_pool_; |
62 | 61 |
63 uword end_; | 62 uword end_; |
64 uword ic_data_load_end_; | 63 uword ic_data_load_end_; |
65 | 64 |
66 intptr_t target_code_pool_index_; | 65 intptr_t target_code_pool_index_; |
67 ICData& ic_data_; | 66 ICData& ic_data_; |
68 | 67 |
69 DISALLOW_COPY_AND_ASSIGN(CallPattern); | 68 DISALLOW_COPY_AND_ASSIGN(CallPattern); |
70 }; | 69 }; |
71 | 70 |
72 | |
73 class NativeCallPattern : public ValueObject { | 71 class NativeCallPattern : public ValueObject { |
74 public: | 72 public: |
75 NativeCallPattern(uword pc, const Code& code); | 73 NativeCallPattern(uword pc, const Code& code); |
76 | 74 |
77 RawCode* target() const; | 75 RawCode* target() const; |
78 void set_target(const Code& target) const; | 76 void set_target(const Code& target) const; |
79 | 77 |
80 NativeFunction native_function() const; | 78 NativeFunction native_function() const; |
81 void set_native_function(NativeFunction target) const; | 79 void set_native_function(NativeFunction target) const; |
82 | 80 |
83 private: | 81 private: |
84 const ObjectPool& object_pool_; | 82 const ObjectPool& object_pool_; |
85 | 83 |
86 uword end_; | 84 uword end_; |
87 intptr_t native_function_pool_index_; | 85 intptr_t native_function_pool_index_; |
88 intptr_t target_code_pool_index_; | 86 intptr_t target_code_pool_index_; |
89 | 87 |
90 DISALLOW_COPY_AND_ASSIGN(NativeCallPattern); | 88 DISALLOW_COPY_AND_ASSIGN(NativeCallPattern); |
91 }; | 89 }; |
92 | 90 |
93 | |
94 // Instance call that can switch between a direct monomorphic call, an IC call, | 91 // Instance call that can switch between a direct monomorphic call, an IC call, |
95 // and a megamorphic call. | 92 // and a megamorphic call. |
96 // load guarded cid load ICData load MegamorphicCache | 93 // load guarded cid load ICData load MegamorphicCache |
97 // load monomorphic target <-> load ICLookup stub -> load MMLookup stub | 94 // load monomorphic target <-> load ICLookup stub -> load MMLookup stub |
98 // call target.entry call stub.entry call stub.entry | 95 // call target.entry call stub.entry call stub.entry |
99 class SwitchableCallPattern : public ValueObject { | 96 class SwitchableCallPattern : public ValueObject { |
100 public: | 97 public: |
101 SwitchableCallPattern(uword pc, const Code& code); | 98 SwitchableCallPattern(uword pc, const Code& code); |
102 | 99 |
103 RawObject* data() const; | 100 RawObject* data() const; |
104 RawCode* target() const; | 101 RawCode* target() const; |
105 void SetData(const Object& data) const; | 102 void SetData(const Object& data) const; |
106 void SetTarget(const Code& target) const; | 103 void SetTarget(const Code& target) const; |
107 | 104 |
108 private: | 105 private: |
109 const ObjectPool& object_pool_; | 106 const ObjectPool& object_pool_; |
110 intptr_t data_pool_index_; | 107 intptr_t data_pool_index_; |
111 intptr_t target_pool_index_; | 108 intptr_t target_pool_index_; |
112 | 109 |
113 DISALLOW_COPY_AND_ASSIGN(SwitchableCallPattern); | 110 DISALLOW_COPY_AND_ASSIGN(SwitchableCallPattern); |
114 }; | 111 }; |
115 | 112 |
116 | |
117 class ReturnPattern : public ValueObject { | 113 class ReturnPattern : public ValueObject { |
118 public: | 114 public: |
119 explicit ReturnPattern(uword pc); | 115 explicit ReturnPattern(uword pc); |
120 | 116 |
121 // bx_lr = 1. | 117 // bx_lr = 1. |
122 static const int kLengthInBytes = 1 * Instr::kInstrSize; | 118 static const int kLengthInBytes = 1 * Instr::kInstrSize; |
123 | 119 |
124 int pattern_length_in_bytes() const { return kLengthInBytes; } | 120 int pattern_length_in_bytes() const { return kLengthInBytes; } |
125 | 121 |
126 bool IsValid() const; | 122 bool IsValid() const; |
127 | 123 |
128 private: | 124 private: |
129 const uword pc_; | 125 const uword pc_; |
130 }; | 126 }; |
131 | 127 |
132 } // namespace dart | 128 } // namespace dart |
133 | 129 |
134 #endif // RUNTIME_VM_INSTRUCTIONS_ARM_H_ | 130 #endif // RUNTIME_VM_INSTRUCTIONS_ARM_H_ |
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