Fix math.round with SSE4.1.

src/ia32/lithium-codegen-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 3737 matching lines @@
       ExternalReference::address_of_minus_one_half();
   bool minus_zero_check =
       instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero);
 
   __ movdbl(xmm_scratch, Operand::StaticVariable(one_half));
 
   if (CpuFeatures::IsSupported(SSE4_1) && !minus_zero_check) {
     CpuFeatures::Scope scope(SSE4_1);
 
     __ addsd(xmm_scratch, input_reg);
-    __ roundsd(xmm_scratch, input_reg, Assembler::kRoundDown);
+    __ roundsd(xmm_scratch, xmm_scratch, Assembler::kRoundDown);
     __ cvttsd2si(output_reg, Operand(xmm_scratch));
     // Overflow is signalled with minint.
     __ cmp(output_reg, 0x80000000u);
     __ RecordComment("D2I conversion overflow");
     DeoptimizeIf(equal, instr->environment());
   } else {
     Label done, round_to_zero, below_one_half, do_not_compensate;
     __ ucomisd(xmm_scratch, input_reg);
     __ j(above, &below_one_half);
 
@@ skipping 2479 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32