Fixed a bug in isNegate intrinsified code, fixed negation for doubles (handling of negative zeros...

runtime/vm/intrinsifier_ia32.cc

 // Copyright (c) 2011, 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.
 //
 // The intrinsic code below is executed before a method has built its frame.
 // The return address is on the stack and the arguments below it.
 // Registers EDX (arguments descriptor) and ECX (function) must be preserved.
 // Each intrinsification method returns true if the corresponding
 // Dart method was intrinsified.
 
@@ skipping 868 matching lines @@
   return true;  // Method is complete, no slow case.
 }
 
 
 static bool Double_isNegative(Assembler* assembler) {
   const Bool& bool_true = Bool::ZoneHandle(Bool::True());
   const Bool& bool_false = Bool::ZoneHandle(Bool::False());
   Label is_false, is_true, is_zero;
   __ movl(EAX, Address(ESP, +1 * kWordSize));
   __ movsd(XMM0, FieldAddress(EAX, Double::value_offset()));
-  __ xorps(XMM1, XMM1);  // 0.0 -> XMM1.
+  __ xorpd(XMM1, XMM1);  // 0.0 -> XMM1.
   __ comisd(XMM0, XMM1);
   __ j(PARITY_EVEN, &is_false, Assembler::kNearJump);  // NaN -> false.
   __ j(EQUAL, &is_zero, Assembler::kNearJump);  // Check for negative zero.
   __ j(ABOVE_EQUAL, &is_false, Assembler::kNearJump);  // >= 0 -> false.
   __ Bind(&is_true);
   __ LoadObject(EAX, bool_true);
   __ ret();
   __ Bind(&is_false);
   __ LoadObject(EAX, bool_false);
   __ ret();
@@ skipping 261 matching lines @@
   }                                                                            \
 
 INTRINSIC_LIST(FIND_INTRINSICS);
 #undef FIND_INTRINSICS
   return false;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32