[Interpreter] Add implementations for load immediate bytecodes.

src/compiler/interpreter-assembler.h

Index: src/compiler/interpreter-assembler.h
diff --git a/src/compiler/interpreter-assembler.h b/src/compiler/interpreter-assembler.h
index 905f3e0585aec3f75d28992b0a0ad24d982b0d74..80ad0b6e5030c7eaae53d47bb841b71b07b7baff 100644
--- a/src/compiler/interpreter-assembler.h
+++ b/src/compiler/interpreter-assembler.h
@@ -36,6 +36,13 @@ class InterpreterAssembler {
 
   Handle<Code> GenerateCode();
 
+  // Returns the Imm8 immediate for bytecode operand |index| in the current

[Michael Starzinger, 2015/08/17 08:22:34]

nit: Comment seems to be outdated, no index is passed in.

[rmcilroy, 2015/08/18 13:06:22]

Changed parameter and comment to operand_index

+  // bytecode.
+  Node* BytecodeOperandImm8(int delta);
+  // Returns the register index for bytecode operand |index| in the current
+  // bytecode.
+  Node* BytecodeOperandReg(int delta);
+
   // Accumulator.
   Node* GetAccumulator();
   void SetAccumulator(Node* value);
@@ -49,15 +56,16 @@ class InterpreterAssembler {
   Node* NumberConstant(double value);
   Node* HeapConstant(Unique<HeapObject> object);
 
+  // Tag and untag Smi values.
+  Node* SmiTag(Node* value);
+  Node* SmiUntag(Node* value);
+
   // Returns from the function.
   void Return();
 
   // Dispatch to the bytecode.
   void Dispatch();
 
-  Node* BytecodeOperand(int index);
-  Node* BytecodeOperandSignExtended(int index);
-
  protected:
   // Close the graph.
   void End();
@@ -79,6 +87,10 @@ class InterpreterAssembler {
   // Returns the offset of register |index| relative to RegisterFilePointer().
   Node* RegisterFrameOffset(Node* index);
 
+  Node* SmiShiftBitsConstant();
+  Node* BytecodeOperand(int index);
+  Node* BytecodeOperandSignExtended(int index);
+
   // Returns BytecodeOffset() advanced by delta bytecodes. Note: this does not
   // update BytecodeOffset() itself.
   Node* Advance(int delta);