[interpreter] Wide register support.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index aa5234924152f24a25383d980b2685749bd4d2db..741c20bfe7399ce2ba8ace56aef8bbf4203243c2 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -104,7 +104,6 @@ namespace interpreter {
   V(LoadICStrict, OperandType::kReg8, OperandType::kIdx8, OperandType::kIdx8)  \
   V(KeyedLoadICSloppy, OperandType::kReg8, OperandType::kIdx8)                 \
   V(KeyedLoadICStrict, OperandType::kReg8, OperandType::kIdx8)                 \
-  /* TODO(rmcilroy): Wide register operands too? */                            \
   V(LoadICSloppyWide, OperandType::kReg8, OperandType::kIdx16,                 \
     OperandType::kIdx16)                                                       \
   V(LoadICStrictWide, OperandType::kReg8, OperandType::kIdx16,                 \
@@ -119,7 +118,6 @@ namespace interpreter {
     OperandType::kIdx8)                                                        \
   V(KeyedStoreICStrict, OperandType::kReg8, OperandType::kReg8,                \
     OperandType::kIdx8)                                                        \
-  /* TODO(rmcilroy): Wide register operands too? */                            \
   V(StoreICSloppyWide, OperandType::kReg8, OperandType::kIdx16,                \
     OperandType::kIdx16)                                                       \
   V(StoreICStrictWide, OperandType::kReg8, OperandType::kIdx16,                \
@@ -289,20 +287,22 @@ enum class Bytecode : uint8_t {
 // in its stack-frame. Register hold parameters, this, and expression values.
 class Register {
  public:
-  Register() : index_(kIllegalIndex) {}
-
-  explicit Register(int index) : index_(index) {}
+  explicit Register(int index = kInvalidIndex) : index_(index) {}
 
   int index() const {
-    DCHECK(index_ != kIllegalIndex);
+    DCHECK(index_ != kInvalidIndex);
     return index_;
   }
   bool is_parameter() const { return index() < 0; }
-  bool is_valid() const { return index_ != kIllegalIndex; }
+  bool is_valid() const { return index_ != kInvalidIndex; }
+  bool is_byte_operand() const;
+  bool is_short_operand() const;
 
   static Register FromParameterIndex(int index, int parameter_count);
   int ToParameterIndex(int parameter_count) const;
   static int MaxParameterIndex();
+  static int MaxRegisterIndex();
+  static int MaxRegisterIndexForByteOperand();
 
   // Returns the register for the function's closure object.
   static Register function_closure();
@@ -350,7 +350,7 @@ class Register {
   }
 
  private:
-  static const int kIllegalIndex = kMaxInt;
+  static const int kInvalidIndex = kMaxInt;
 
   void* operator new(size_t size);
   void operator delete(void* p);
@@ -379,6 +379,9 @@ class Bytecodes {
   // Returns the number of operands expected by |bytecode|.
   static int NumberOfOperands(Bytecode bytecode);
 
+  // Returns the number of register operands expected by |bytecode|.
+  static int NumberOfRegisterOperands(Bytecode bytecode);
+
   // Return the i-th operand of |bytecode|.
   static OperandType GetOperandType(Bytecode bytecode, int i);
 
@@ -389,37 +392,41 @@ class Bytecodes {
   // of the bytecode.
   static int GetOperandOffset(Bytecode bytecode, int i);
 
+  // Returns a zero-based bitmap of the register operand positions of
+  // |bytecode|.
+  static int GetRegisterOperandBitmap(Bytecode bytecode);
+
   // Returns the size of the bytecode including its operands.
   static int Size(Bytecode bytecode);
 
   // Returns the size of |operand|.
   static OperandSize SizeOfOperand(OperandType operand);
 
-  // Return true if the bytecode is a conditional jump taking
+  // Returns true if the bytecode is a conditional jump taking
   // an immediate byte operand (OperandType::kImm8).
   static bool IsConditionalJumpImmediate(Bytecode bytecode);
 
-  // Return true if the bytecode is a conditional jump taking
+  // Returns true if the bytecode is a conditional jump taking
   // a constant pool entry (OperandType::kIdx8).
   static bool IsConditionalJumpConstant(Bytecode bytecode);
 
-  // Return true if the bytecode is a conditional jump taking
+  // Returns true if the bytecode is a conditional jump taking
   // a constant pool entry (OperandType::kIdx16).
   static bool IsConditionalJumpConstantWide(Bytecode bytecode);
 
-  // Return true if the bytecode is a conditional jump taking
+  // Returns true if the bytecode is a conditional jump taking
   // any kind of operand.
   static bool IsConditionalJump(Bytecode bytecode);
 
-  // Return true if the bytecode is a jump or a conditional jump taking
+  // Returns true if the bytecode is a jump or a conditional jump taking
   // an immediate byte operand (OperandType::kImm8).
   static bool IsJumpImmediate(Bytecode bytecode);
 
-  // Return true if the bytecode is a jump or conditional jump taking a
+  // Returns true if the bytecode is a jump or conditional jump taking a
   // constant pool entry (OperandType::kIdx8).
   static bool IsJumpConstant(Bytecode bytecode);
 
-  // Return true if the bytecode is a jump or conditional jump taking a
+  // Returns true if the bytecode is a jump or conditional jump taking a
   // constant pool entry (OperandType::kIdx16).
   static bool IsJumpConstantWide(Bytecode bytecode);