MIPS: [Interpreter] Add support for JS calls.

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 6e51b0764e9c5dc0fcbebdb125a5c2782905be40..53ad4255eed87ac962decbf10dacb3b50239de11 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -1664,6 +1664,35 @@ void Builtins::Generate_Call(MacroAssembler* masm) {
 }
 
 
+// static
+void Builtins::Generate_PushArgsAndCall(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- a0 : the number of arguments (not including the receiver)
+  //  -- a2 : the address of the first argument to be pushed. Subsequent
+  //          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.
+  __ sll(a3, a3, kPointerSizeLog2);
+  __ Subu(a3, a2, Operand(a3));
+
+  // Push the arguments.
+  Label loop_header, loop_check;
+  __ Branch(&loop_check);
+  __ bind(&loop_header);
+  __ lw(t0, MemOperand(a2));
+  __ Addu(a2, a2, Operand(-kPointerSize));
+  __ push(t0);
+  __ bind(&loop_check);
+  __ Branch(&loop_header, gt, a2, Operand(a3));
+
+  // Call the target.
+  __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
+}
+
+
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // State setup as expected by MacroAssembler::InvokePrologue.
   // ----------- S t a t e -------------