[Interpreter] Support for operator new.

src/ppc/builtins-ppc.cc

Index: src/ppc/builtins-ppc.cc
diff --git a/src/ppc/builtins-ppc.cc b/src/ppc/builtins-ppc.cc
index cdbb1c24a076d7446d8ab230bd1f110ccc9be9da..3d188a6e9839f0ec5bcb7e5dcd91c7d5e78bd051 100644
--- a/src/ppc/builtins-ppc.cc
+++ b/src/ppc/builtins-ppc.cc
@@ -983,6 +983,7 @@ 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.
   //  -- r4 : the target to call (can be any Object).
+  // -----------------------------------
 
   // Calculate number of arguments (add one for receiver).
   __ addi(r6, r3, Operand(1));
@@ -1001,6 +1002,41 @@ void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
 }
 
 
+// static
+void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  // -- r3 : argument count (not including receiver)
+  // -- r6 : original constructor
+  // -- r4 : constructor to call
+  // -- r5 : address of the first argument
+  // -----------------------------------
+
+  // Calculate number of arguments.
+  __ mr(r7, r3);
+
+  // Push a slot for the receiver.
+  __ push(r3);
+
+  // Skip pushing arguments if none.
+  Label loop_end;
+  __ cmpi(r7, Operand(0));
+  __ beq(&loop_end);
+
+  // Push the arguments
+  Label loop;
+  __ addi(r5, r5, Operand(kPointerSize));  // Bias up for LoadPU
+  __ mtctr(r7);
+  __ bind(&loop);
+  __ LoadPU(r7, MemOperand(r5, -kPointerSize));
+  __ push(r7);
+  __ bdnz(&loop);
+  __ bind(&loop_end);
+
+  // Call the constructor with r3, r4, and r6 unmodified.
+  __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CONSTRUCT_CALL);
+}
+
+
 void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   CallRuntimePassFunction(masm, Runtime::kCompileLazy);
   GenerateTailCallToReturnedCode(masm);