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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 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 #include "src/interpreter/bytecode-array-iterator.h" | 5 #include "src/interpreter/bytecode-array-iterator.h" |
6 | 6 |
7 #include "src/objects-inl.h" | 7 #include "src/objects-inl.h" |
8 | 8 |
9 namespace v8 { | 9 namespace v8 { |
10 namespace internal { | 10 namespace internal { |
11 namespace interpreter { | 11 namespace interpreter { |
12 | 12 |
13 BytecodeArrayIterator::BytecodeArrayIterator( | 13 BytecodeArrayIterator::BytecodeArrayIterator( |
14 Handle<BytecodeArray> bytecode_array) | 14 Handle<BytecodeArray> bytecode_array) |
15 : bytecode_array_(bytecode_array), bytecode_offset_(0) {} | 15 : bytecode_array_(bytecode_array), bytecode_offset_(0) {} |
16 | 16 |
17 | 17 |
18 void BytecodeArrayIterator::Advance() { | 18 void BytecodeArrayIterator::Advance() { |
19 bytecode_offset_ += Bytecodes::Size(current_bytecode()); | 19 bytecode_offset_ += Bytecodes::Size(current_bytecode()); |
20 } | 20 } |
21 | 21 |
22 | 22 |
| 23 void BytecodeArrayIterator::AdvanceToOffset(int offset) { |
| 24 DCHECK_GE(offset, 0); |
| 25 DCHECK_LE(offset, bytecode_array()->length()); |
| 26 bytecode_offset_ = offset; |
| 27 } |
| 28 |
| 29 |
23 bool BytecodeArrayIterator::done() const { | 30 bool BytecodeArrayIterator::done() const { |
24 return bytecode_offset_ >= bytecode_array()->length(); | 31 return bytecode_offset_ >= bytecode_array()->length(); |
25 } | 32 } |
26 | 33 |
27 | 34 |
28 Bytecode BytecodeArrayIterator::current_bytecode() const { | 35 Bytecode BytecodeArrayIterator::current_bytecode() const { |
29 DCHECK(!done()); | 36 DCHECK(!done()); |
30 uint8_t current_byte = bytecode_array()->get(bytecode_offset_); | 37 uint8_t current_byte = bytecode_array()->get(bytecode_offset_); |
31 return interpreter::Bytecodes::FromByte(current_byte); | 38 return interpreter::Bytecodes::FromByte(current_byte); |
32 } | 39 } |
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91 | 98 |
92 Handle<Object> BytecodeArrayIterator::GetConstantForIndexOperand( | 99 Handle<Object> BytecodeArrayIterator::GetConstantForIndexOperand( |
93 int operand_index) const { | 100 int operand_index) const { |
94 Handle<FixedArray> constants = handle(bytecode_array()->constant_pool()); | 101 Handle<FixedArray> constants = handle(bytecode_array()->constant_pool()); |
95 return FixedArray::get(constants, GetIndexOperand(operand_index)); | 102 return FixedArray::get(constants, GetIndexOperand(operand_index)); |
96 } | 103 } |
97 | 104 |
98 } // namespace interpreter | 105 } // namespace interpreter |
99 } // namespace internal | 106 } // namespace internal |
100 } // namespace v8 | 107 } // namespace v8 |
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