Only require SSE2 at minimum hardware requirement.

runtime/vm/dart.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/dart.h"
 
 #include "vm/dart_api_state.h"
 #include "vm/flags.h"
 #include "vm/freelist.h"
 #include "vm/handles.h"
@@ skipping 60 matching lines @@
     StackZone zone(vm_isolate_);
     HandleScope handle_scope(vm_isolate_);
     Heap::Init(vm_isolate_);
     ObjectStore::Init(vm_isolate_);
     Object::InitOnce();
     StubCode::InitOnce();
     Scanner::InitOnce();
     Symbols::InitOnce(vm_isolate_);
     CPUFeatures::InitOnce();
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
-    // Dart VM requires at least SSE3.
-    if (!CPUFeatures::sse3_supported()) {
-      return "SSE3 is required.";
+    // Dart VM requires at least SSE2.
+    if (!CPUFeatures::sse2_supported()) {
+      return "SSE2 is required.";
     }
 #endif
     PremarkingVisitor premarker(vm_isolate_);
     vm_isolate_->heap()->IterateOldObjects(&premarker);
     vm_isolate_->heap()->WriteProtect(true);
   }
   Isolate::SetCurrent(NULL);  // Unregister the VM isolate from this thread.
   Isolate::SetCreateCallback(create);
   Isolate::SetInterruptCallback(interrupt);
   Isolate::SetShutdownCallback(shutdown);
@@ skipping 91 matching lines @@
   isolate->Shutdown();
   delete isolate;
 
   Dart_IsolateShutdownCallback callback = Isolate::ShutdownCallback();
   if (callback != NULL) {
     (callback)(callback_data);
   }
 }
 
 }  // namespace dart