Require SSE2 support for the ia32 port.

src/platform-posix.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Platform-specific code for POSIX goes here. This is not a platform on its
 // own, but contains the parts which are the same across the POSIX platforms
 // Linux, MacOS, FreeBSD, OpenBSD, NetBSD and QNX.
 
 #include <dlfcn.h>
 #include <pthread.h>
@@ skipping 37 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 // 0 is never a valid thread id.
 static const pthread_t kNoThread = (pthread_t) 0;
 
 
 uint64_t OS::CpuFeaturesImpliedByPlatform() {
 #if V8_OS_MACOSX
-  // Mac OS X requires all these to install so we can assume they are present.
+  // Mac OS X requires CMOV to install so we can assume it is present.
   // These constants are defined by the CPUid instructions.
   const uint64_t one = 1;
-  return (one << SSE2) | (one << CMOV);
+  return one << CMOV;
 #else
   return 0;  // Nothing special about the other systems.
 #endif
 }
 
 
 // Maximum size of the virtual memory.  0 means there is no artificial
 // limit.
 
 intptr_t OS::MaxVirtualMemory() {
@@ skipping 687 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