Fix typo in the CheckSSE2OperandIsInt32: use bitwise not instead of integer negation.

src/ia32/code-stubs-ia32.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 2854 matching lines @@
 
 void FloatingPointHelper::CheckSSE2OperandIsInt32(MacroAssembler* masm,
                                                   Label* non_int32,
                                                   XMMRegister operand,
                                                   Register scratch,
                                                   XMMRegister xmm_scratch) {
   __ cvttsd2si(scratch, Operand(operand));
   __ cvtsi2sd(xmm_scratch, scratch);
   __ pcmpeqd(xmm_scratch, operand);
   __ movmskps(scratch, xmm_scratch);
-  __ neg(scratch);
+  // Two least significant bits should be both set.
+  __ not_(scratch);
   __ test(scratch, Immediate(3));
   __ j(not_zero, non_int32);
 }
 
 
 void FloatingPointHelper::LoadFloatOperands(MacroAssembler* masm,
                                             Register scratch,
                                             ArgLocation arg_location) {
   Label load_smi_1, load_smi_2, done_load_1, done;
   if (arg_location == ARGS_IN_REGISTERS) {
@@ skipping 4584 matching lines @@
   // Restore ecx.
   __ pop(ecx);
   __ ret(0);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32