[Interpreter] Bytecodes for exchanging registers.

src/interpreter/bytecode-array-builder.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include <vector>
 
 #include "src/ast/ast.h"
@@ skipping 82 matching lines @@
 
   // Stores the object in the accumulator into |slot_index| of |context|.
   BytecodeArrayBuilder& StoreContextSlot(Register context, int slot_index);
 
   // Register-accumulator transfers.
   BytecodeArrayBuilder& LoadAccumulatorWithRegister(Register reg);
   BytecodeArrayBuilder& StoreAccumulatorInRegister(Register reg);
 
   // Register-register transfer.
   BytecodeArrayBuilder& MoveRegister(Register from, Register to);
+  BytecodeArrayBuilder& ExchangeRegisters(Register reg0, Register reg1);
 
   // Named load property.
   BytecodeArrayBuilder& LoadNamedProperty(Register object,
                                           const Handle<String> name,
                                           int feedback_slot,
                                           LanguageMode language_mode);
   // Keyed load property. The key should be in the accumulator.
   BytecodeArrayBuilder& LoadKeyedProperty(Register object, int feedback_slot,
                                           LanguageMode language_mode);
 
@@ skipping 129 matching lines @@
   static Bytecode BytecodeForStoreGlobal(LanguageMode language_mode);
   static Bytecode BytecodeForStoreLookupSlot(LanguageMode language_mode);
   static Bytecode BytecodeForCreateArguments(CreateArgumentsType type);
   static Bytecode BytecodeForDelete(LanguageMode language_mode);
 
   static bool FitsInIdx8Operand(int value);
   static bool FitsInIdx8Operand(size_t value);
   static bool FitsInImm8Operand(int value);
   static bool FitsInIdx16Operand(int value);
   static bool FitsInIdx16Operand(size_t value);
+  static bool FitsInReg8Operand(Register value);
+  static bool FitsInReg16Operand(Register value);
 
   static Bytecode GetJumpWithConstantOperand(Bytecode jump_with_smi8_operand);
   static Bytecode GetJumpWithToBoolean(Bytecode jump);
 
+  Register MapRegister(Register reg);
+  Register MapRegisters(Register reg, Register args_base, int args_length = 1);
+
   template <size_t N>
-  INLINE(void Output(Bytecode bytecode, uint32_t(&oprands)[N]));
+  INLINE(void Output(Bytecode bytecode, uint32_t(&operands)[N]));
   void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
               uint32_t operand2, uint32_t operand3);
   void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
               uint32_t operand2);
   void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1);
   void Output(Bytecode bytecode, uint32_t operand0);
   void Output(Bytecode bytecode);
 
   BytecodeArrayBuilder& OutputJump(Bytecode jump_bytecode,
                                    BytecodeLabel* label);
@@ skipping 120 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterScope);
 };
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_