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

R=ulan@chromium.org
BUG=

Review URL: https://codereview.chromium.org/11662009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13274 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/code-stubs-ia32.cc

@@ -2872,7 +2872,8 @@ void FloatingPointHelper::CheckSSE2OperandIsInt32(MacroAssembler* masm,
   __ 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);
 }