Fix unsigned-Smi check in MappedArgumentsLookup

src/mips/ic-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 749 matching lines @@
                                                 Label* slow_case) {
   // Check that the receiver is a JSObject. Because of the map check
   // later, we do not need to check for interceptors or whether it
   // requires access checks.
   __ JumpIfSmi(object, slow_case);
   // Check that the object is some kind of JSObject.
   __ GetObjectType(object, scratch1, scratch2);
   __ Branch(slow_case, lt, scratch2, Operand(FIRST_JS_RECEIVER_TYPE));
 
   // Check that the key is a positive smi.
-  __ And(scratch1, key, Operand(0x8000001));
+  __ And(scratch1, key, Operand(0x80000001));
   __ Branch(slow_case, ne, scratch1, Operand(zero_reg));
 
   // Load the elements into scratch1 and check its map.
   __ lw(scratch1, FieldMemOperand(object, JSObject::kElementsOffset));
   __ CheckMap(scratch1,
               scratch2,
               Heap::kNonStrictArgumentsElementsMapRootIndex,
               slow_case,
               DONT_DO_SMI_CHECK);
   // Check if element is in the range of mapped arguments. If not, jump
@@ skipping 971 matching lines @@
   } else {
     ASSERT(Assembler::IsBne(branch_instr));
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS