[Interpreter] Add support for calling runtime functions which return a pair.

src/interpreter/bytecodes.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_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <iosfwd>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
 // Do not include anything from src/interpreter here!
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
 // The list of operand types used by bytecodes.
 #define OPERAND_TYPE_LIST(V)       \
                                    \
   /* None operand. */              \
   V(None, OperandSize::kNone)      \
                                    \
   /* Byte operands. */             \
   V(Count8, OperandSize::kByte)    \
   V(Imm8, OperandSize::kByte)      \
   V(Idx8, OperandSize::kByte)      \
   V(MaybeReg8, OperandSize::kByte) \
   V(Reg8, OperandSize::kByte)      \
+  V(RegPair8, OperandSize::kByte)  \
                                    \
   /* Short operands. */            \
   V(Count16, OperandSize::kShort)  \
   V(Idx16, OperandSize::kShort)    \
   V(Reg16, OperandSize::kShort)
 
 // The list of bytecodes which are interpreted by the interpreter.
 #define BYTECODE_LIST(V)                                                       \
                                                                                \
   /* Loading the accumulator */                                                \
@@ skipping 98 matching lines @@
   V(DeletePropertySloppy, OperandType::kReg8)                                  \
   V(DeleteLookupSlot, OperandType::kNone)                                      \
                                                                                \
   /* Call operations */                                                        \
   V(Call, OperandType::kReg8, OperandType::kReg8, OperandType::kCount8,        \
     OperandType::kIdx8)                                                        \
   V(CallWide, OperandType::kReg8, OperandType::kReg8, OperandType::kCount16,   \
     OperandType::kIdx16)                                                       \
   V(CallRuntime, OperandType::kIdx16, OperandType::kMaybeReg8,                 \
     OperandType::kCount8)                                                      \
+  V(CallRuntimeForPair, OperandType::kIdx16, OperandType::kMaybeReg8,          \
+    OperandType::kCount8, OperandType::kRegPair8)                              \
   V(CallJSRuntime, OperandType::kIdx16, OperandType::kReg8,                    \
     OperandType::kCount8)                                                      \
                                                                                \
   /* New operator */                                                           \
   V(New, OperandType::kReg8, OperandType::kMaybeReg8, OperandType::kCount8)    \
                                                                                \
   /* Test Operators */                                                         \
   V(TestEqual, OperandType::kReg8)                                             \
   V(TestNotEqual, OperandType::kReg8)                                          \
   V(TestEqualStrict, OperandType::kReg8)                                       \
@@ skipping 247 matching lines @@
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
 std::ostream& operator<<(std::ostream& os, const OperandSize& operand_type);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_