Fixes bug in double to int conversion on arm.

runtime/vm/simulator_arm.cc

 // Copyright (c) 2013, 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 <math.h>  // for isnan.
 #include <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
@@ skipping 2809 matching lines @@
                     ud_val = INT_MAX;
                   } else if (dm_val > 0.0) {
                     ud_val = static_cast<uint32_t>(dm_val);
                   }
                 } else {
                   // Format(instr, "vcvtid'cond 'sd, 'dm");
                   if (dm_val <= INT_MIN) {
                     id_val = INT_MIN;
                   } else if (dm_val >= INT_MAX) {
                     id_val = INT_MAX;
+                  } else if (isnan(dm_val)) {
+                    id_val = 0;
                   } else {
                     id_val = static_cast<int32_t>(dm_val);
                   }
                   ASSERT((id_val >= 0) || !(dm_val >= 0.0));
                 }
               }
               int32_t sd_val;
               if (instr->Bit(16) == 0) {
                 sd_val = static_cast<int32_t>(ud_val);
               } else {
@@ skipping 276 matching lines @@
   set_register(kExceptionObjectReg, bit_cast<int32_t>(raw_exception));
   set_register(kStackTraceObjectReg, bit_cast<int32_t>(raw_stacktrace));
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_ARM)
 
 #endif  // defined TARGET_ARCH_ARM