[Interpreter] Add CallRuntime support to the interpreter.

src/interpreter/interpreter.cc

Index: src/interpreter/interpreter.cc
diff --git a/src/interpreter/interpreter.cc b/src/interpreter/interpreter.cc
index f993724c3e1692a74513b6cc96b764a59b6cf8ad..2f341aaf75fc437923a334ad76f5beb71b916e98 100644
--- a/src/interpreter/interpreter.cc
+++ b/src/interpreter/interpreter.cc
@@ -343,10 +343,10 @@ void Interpreter::DoMod(compiler::InterpreterAssembler* assembler) {
 }
 
 
-// Call <receiver> <arg_count>
+// Call <callable> <receiver> <arg_count>
 //
-// Call a JS function with receiver and |arg_count| arguments in subsequent
-// registers. The JSfunction or Callable to call is in the accumulator.
+// Call a JSfunction or Callable in |callable| with receiver and |arg_count|
+// arguments in subsequent registers.
 void Interpreter::DoCall(compiler::InterpreterAssembler* assembler) {
   Node* function_reg = __ BytecodeOperandReg(0);
   Node* function = __ LoadRegister(function_reg);
@@ -359,6 +359,21 @@ void Interpreter::DoCall(compiler::InterpreterAssembler* assembler) {
 }
 
 
+// CallRuntime <function_id> <first_arg> <arg_count>
+//
+// Call the runtime function |function_id| with first argument in register
+// |first_arg| and |arg_count| arguments in subsequent registers.
+void Interpreter::DoCallRuntime(compiler::InterpreterAssembler* assembler) {
+  Node* function_id = __ BytecodeOperandIdx(0);

[oth, 2015/09/25 09:49:27]

A TODO for the wider operand(s) discussed for function_id.

[rmcilroy, 2015/09/28 16:20:47]

Implemented as a wide operand now.

+  Node* first_arg_reg = __ BytecodeOperandReg(1);
+  Node* first_arg = __ RegisterLocation(first_arg_reg);
+  Node* args_count = __ BytecodeOperandCount(2);
+  Node* result = __ CallRuntime(function_id, first_arg, args_count);
+  __ SetAccumulator(result);
+  __ Dispatch();
+}
+
+
 // TestEqual <src>
 //
 // Test if the value in the <src> register equals the accumulator.