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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/bytecodes.h" | 5 #include "src/interpreter/bytecodes.h" |
6 | 6 |
7 #include "src/frames.h" | 7 #include "src/frames.h" |
8 #include "src/interpreter/bytecode-traits.h" | 8 #include "src/interpreter/bytecode-traits.h" |
9 | 9 |
10 namespace v8 { | 10 namespace v8 { |
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211 } | 211 } |
212 | 212 |
213 | 213 |
214 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type) { | 214 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type) { |
215 return os << Bytecodes::OperandTypeToString(operand_type); | 215 return os << Bytecodes::OperandTypeToString(operand_type); |
216 } | 216 } |
217 | 217 |
218 | 218 |
219 static const int kLastParamRegisterIndex = | 219 static const int kLastParamRegisterIndex = |
220 -InterpreterFrameConstants::kLastParamFromRegisterPointer / kPointerSize; | 220 -InterpreterFrameConstants::kLastParamFromRegisterPointer / kPointerSize; |
| 221 static const int kFunctionContextRegisterIndex = |
| 222 -InterpreterFrameConstants::kContextFromRegisterPointer / kPointerSize; |
221 | 223 |
222 | 224 |
223 // Registers occupy range 0-127 in 8-bit value leaving 128 unused values. | 225 // Registers occupy range 0-127 in 8-bit value leaving 128 unused values. |
224 // Parameter indices are biased with the negative value kLastParamRegisterIndex | 226 // Parameter indices are biased with the negative value kLastParamRegisterIndex |
225 // for ease of access in the interpreter. | 227 // for ease of access in the interpreter. |
226 static const int kMaxParameterIndex = 128 + kLastParamRegisterIndex; | 228 static const int kMaxParameterIndex = 128 + kLastParamRegisterIndex; |
227 | 229 |
228 | 230 |
229 Register Register::FromParameterIndex(int index, int parameter_count) { | 231 Register Register::FromParameterIndex(int index, int parameter_count) { |
230 DCHECK_GE(index, 0); | 232 DCHECK_GE(index, 0); |
231 DCHECK_LT(index, parameter_count); | 233 DCHECK_LT(index, parameter_count); |
232 DCHECK_LE(parameter_count, kMaxParameterIndex + 1); | 234 DCHECK_LE(parameter_count, kMaxParameterIndex + 1); |
233 int register_index = kLastParamRegisterIndex - parameter_count + index + 1; | 235 int register_index = kLastParamRegisterIndex - parameter_count + index + 1; |
234 DCHECK_LT(register_index, 0); | 236 DCHECK_LT(register_index, 0); |
235 DCHECK_GE(register_index, Register::kMinRegisterIndex); | 237 DCHECK_GE(register_index, Register::kMinRegisterIndex); |
236 return Register(register_index); | 238 return Register(register_index); |
237 } | 239 } |
238 | 240 |
239 | 241 |
240 int Register::ToParameterIndex(int parameter_count) const { | 242 int Register::ToParameterIndex(int parameter_count) const { |
241 DCHECK(is_parameter()); | 243 DCHECK(is_parameter()); |
242 return index() - kLastParamRegisterIndex + parameter_count - 1; | 244 return index() - kLastParamRegisterIndex + parameter_count - 1; |
243 } | 245 } |
244 | 246 |
245 | 247 |
| 248 Register Register::function_context() { |
| 249 return Register(kFunctionContextRegisterIndex); |
| 250 } |
| 251 |
| 252 |
| 253 bool Register::is_function_context() const { |
| 254 return index() == kFunctionContextRegisterIndex; |
| 255 } |
| 256 |
| 257 |
246 int Register::MaxParameterIndex() { return kMaxParameterIndex; } | 258 int Register::MaxParameterIndex() { return kMaxParameterIndex; } |
247 | 259 |
248 | 260 |
249 uint8_t Register::ToOperand() const { return static_cast<uint8_t>(-index_); } | 261 uint8_t Register::ToOperand() const { return static_cast<uint8_t>(-index_); } |
250 | 262 |
251 | 263 |
252 Register Register::FromOperand(uint8_t operand) { | 264 Register Register::FromOperand(uint8_t operand) { |
253 return Register(-static_cast<int8_t>(operand)); | 265 return Register(-static_cast<int8_t>(operand)); |
254 } | 266 } |
255 | 267 |
256 } // namespace interpreter | 268 } // namespace interpreter |
257 } // namespace internal | 269 } // namespace internal |
258 } // namespace v8 | 270 } // namespace v8 |
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