[Interpreter] Support for operator new.

src/mips/builtins-mips.cc

Index: src/mips/builtins-mips.cc
diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
index 2e6904380a7f644ba3587b8e0075d2f6a0ad27c2..70970a82f99e6e62f9024491bfa46db33226fe8b 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -986,6 +986,7 @@ void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
   //          arguments should be consecutive above this, in the same order as
   //          they are to be pushed onto the stack.
   //  -- a1 : the target to call (can be any Object).
+  // -----------------------------------
 
   // Find the address of the last argument.
   __ Addu(a3, a0, Operand(1));  // Add one for receiver.
@@ -1007,6 +1008,37 @@ void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
 }
 
 
+// static
+void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  // -- a0 : argument count (not including receiver)
+  // -- a3 : original constructor
+  // -- a1 : constructor to call
+  // -- a2 : address of the first argument
+  // -----------------------------------
+
+  // Find the address of the last argument.
+  __ sll(t0, a0, kPointerSizeLog2);
+  __ Subu(t0, a2, Operand(t0));
+
+  // Push a slot for the receiver.
+  __ push(zero_reg);
+
+  // Push the arguments.
+  Label loop_header, loop_check;
+  __ Branch(&loop_check);
+  __ bind(&loop_header);
+  __ lw(t1, MemOperand(a2));
+  __ Addu(a2, a2, Operand(-kPointerSize));
+  __ push(t1);
+  __ bind(&loop_check);
+  __ Branch(&loop_header, gt, a2, Operand(t0));
+
+  // Call the constructor with a0, a1, and a3 unmodified.
+  __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CONSTRUCT_CALL);
+}
+
+
 void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   CallRuntimePassFunction(masm, Runtime::kCompileLazy);
   GenerateTailCallToReturnedCode(masm);