Fix no sse3 support by correctly allocating temp register

Review URL: http://codereview.chromium.org/5534004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5924 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/lithium-ia32.cc

@@ -1694,7 +1694,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
       bool needs_check = !instr->value()->type().IsSmi();
       if (needs_check) {
         LOperand* xmm_temp =
-            (instr->CanTruncateToInt32() && !CpuFeatures::IsSupported(SSE3))
+            (instr->CanTruncateToInt32() && CpuFeatures::IsSupported(SSE3))
             ? NULL
             : FixedTemp(xmm1);
         LInstruction* res = new LTaggedToI(value, xmm_temp);