[crankshaft][X87] Fix Math.min(-0, -0)

src/crankshaft/x87/lithium-codegen-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/crankshaft/x87/lithium-codegen-x87.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 2062 matching lines @@
     if (operation == HMathMinMax::kMathMin) {
       // Push st0 and st1 to stack, then pop them to temp registers and OR them,
       // load it to left.
       Register scratch_reg = ToRegister(instr->temp());
       __ fld(1);
       __ fld(1);
       __ sub(esp, Immediate(2 * kPointerSize));
       __ fstp_s(MemOperand(esp, 0));
       __ fstp_s(MemOperand(esp, kPointerSize));
       __ pop(scratch_reg);
-      __ xor_(MemOperand(esp, 0), scratch_reg);
+      __ or_(MemOperand(esp, 0), scratch_reg);
       X87Mov(left_reg, MemOperand(esp, 0), kX87FloatOperand);
       __ pop(scratch_reg);  // restore esp
     } else {
       // Since we operate on +0 and/or -0, addsd and andsd have the same effect.
       X87Fxch(left_reg);
       __ fadd(1);
     }
     __ jmp(&return_left, Label::kNear);
 
     __ bind(&check_nan_left);
@@ skipping 3858 matching lines @@
   __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), context);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87