[Interpreter] Add CallRuntime support to the interpreter.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index 9bc634ef94cd538b541186177e19c56c5b30e53e..c67e4c9161f009fd07ffc2c4ea35c50862aedad9 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -456,6 +456,18 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::Call(Register callable,
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::CallRuntime(
+    Runtime::FunctionId function_id, Register first_arg, size_t arg_count) {
+  if (FitsInIdxOperand(function_id) && FitsInIdxOperand(arg_count)) {
+    Output(Bytecode::kCallRuntime, static_cast<uint8_t>(function_id),
+           first_arg.ToOperand(), static_cast<uint8_t>(arg_count));
+  } else {
+    UNIMPLEMENTED();
+  }
+  return *this;
+}
+
+
 size_t BytecodeArrayBuilder::GetConstantPoolEntry(Handle<Object> object) {
   // These constants shouldn't be added to the constant pool, the should use
   // specialzed bytecodes instead.