Use xorps xmm1, xmm1 to creat a 0.0 cconstant. Add to utils a bitwise double test.

runtime/vm/disassembler_ia32.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/disassembler.h"
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 #include "platform/utils.h"
 #include "vm/allocation.h"
@@ skipping 1342 matching lines @@
           data += 2;
           data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data);
         } else if (f0byte == 0x57) {
           data += 2;
           int mod, regop, rm;
           GetModRm(*data, &mod, &regop, &rm);
           Print(f0mnem);
           Print(" ");
           PrintXmmRegister(regop);
           Print(",");
-          data += PrintRightOperand(data);
+          data += PrintRightXmmOperand(data);
         } else if (f0byte == 0xB1) {
           data += 2;
           data += PrintOperands(f0mnem, OPER_REG_OP_ORDER, data);
         } else if ((f0byte & 0xF0) == 0x90) {
           data += SetCC(data);
         } else if ((f0byte & 0xF0) == 0x40) {
           data += CMov(data);
         } else if (f0byte == 0x2F) {
           data += 2;
           int mod, regop, rm;
@@ skipping 496 matching lines @@
                                   pc);
     pc += instruction_length;
   }
 
   return;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32