ARM: Enable the subnormal floats on QNX.

src/platform-posix.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 588 matching lines @@
   dynamic_pthread_setname_np(name);
 #elif defined(PR_SET_NAME)
   prctl(PR_SET_NAME,
         reinterpret_cast<unsigned long>(name),  // NOLINT
         0, 0, 0);
 #endif
 }
 
 
 static void* ThreadEntry(void* arg) {
+#if V8_OS_QNX && V8_HOST_ARCH_ARM
+  // On QNX/ARM, subnormal float support is a per-thread setting,
+  // disabled by default. Enable it in all new threads.
+  OS::ArmEnableSubnormalFloat();
+#endif
   Thread* thread = reinterpret_cast<Thread*>(arg);
   // This is also initialized by the first argument to pthread_create() but we
   // don't know which thread will run first (the original thread or the new
   // one) so we initialize it here too.
   thread->data()->thread_ = pthread_self();
   SetThreadName(thread->name());
   ASSERT(thread->data()->thread_ != kNoThread);
   thread->NotifyStartedAndRun();
   return NULL;
 }
@@ skipping 157 matching lines @@
 
 void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
   pthread_key_t pthread_key = LocalKeyToPthreadKey(key);
   int result = pthread_setspecific(pthread_key, value);
   ASSERT_EQ(0, result);
   USE(result);
 }
 
 
 } }  // namespace v8::internal