[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 b4615a557f61335e9ffd8119c584b3bc9bbcf978..78b5e1e76927762f6309150af6886b866669bf1b 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -474,6 +474,16 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::Call(Register callable,
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::CallRuntime(
+    Runtime::FunctionId function_id, Register first_arg, size_t arg_count) {
+  DCHECK(FitsInWideIdxOperand(function_id));
+  DCHECK(FitsInIdxOperand(arg_count));
+  Output(Bytecode::kCallRuntime, static_cast<uint16_t>(function_id),
+         first_arg.ToOperand(), static_cast<uint8_t>(arg_count));
+  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.
@@ -611,6 +621,12 @@ bool BytecodeArrayBuilder::FitsInImm8Operand(int value) {
 }
 
 
+// static
+bool BytecodeArrayBuilder::FitsInWideIdxOperand(int value) {
+  return kMinUInt16 <= value && value <= kMaxUInt16;
+}
+
+
 TemporaryRegisterScope::TemporaryRegisterScope(BytecodeArrayBuilder* builder)
     : builder_(builder), count_(0), last_register_index_(-1) {}