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-rw-r--r--erts/include/internal/libatomic_ops/ethread.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/erts/include/internal/libatomic_ops/ethread.h b/erts/include/internal/libatomic_ops/ethread.h
index ee73ba73bc..e1fdd588bb 100644
--- a/erts/include/internal/libatomic_ops/ethread.h
+++ b/erts/include/internal/libatomic_ops/ethread.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2010. All Rights Reserved.
+ * Copyright Ericsson AB 2010-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -25,6 +25,18 @@
#ifndef ETHREAD_LIBATOMIC_OPS_H__
#define ETHREAD_LIBATOMIC_OPS_H__
+#if (defined(ETHR_HAVE_LIBATOMIC_OPS) \
+ && ((ETHR_SIZEOF_AO_T == 4 && !defined(ETHR_HAVE_NATIVE_ATOMIC32)) \
+ || (ETHR_SIZEOF_AO_T == 8 && !defined(ETHR_HAVE_NATIVE_ATOMIC64))))
+
+#if defined(__x86_64__)
+#define AO_USE_PENTIUM4_INSTRS
+#endif
+
+#include "atomic_ops.h"
+#include "ethr_membar.h"
#include "ethr_atomic.h"
#endif
+
+#endif