整理

include/boost/atomic/detail/caps_arch_gcc_ppc.hpp

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+/*
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Copyright (c) 2009 Helge Bahmann
+ * Copyright (c) 2013 Tim Blechmann
+ * Copyright (c) 2014 Andrey Semashev
+ */
+/*!
+ * \file   atomic/detail/caps_arch_gcc_ppc.hpp
+ *
+ * This header defines feature capabilities macros
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_CAPS_ARCH_GCC_PPC_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_CAPS_ARCH_GCC_PPC_HPP_INCLUDED_
+
+#include <boost/atomic/detail/config.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+#if defined(__POWERPC__) || defined(__PPC__)
+
+#if defined(_ARCH_PWR8)
+// Power8 and later architectures have 8 and 16-bit instructions
+#define BOOST_ATOMIC_DETAIL_PPC_HAS_LBARX_STBCX
+#define BOOST_ATOMIC_DETAIL_PPC_HAS_LHARX_STHCX
+#endif
+
+#if defined(__powerpc64__) || defined(__PPC64__)
+// Power7 and later architectures in 64-bit mode have 64-bit instructions
+#define BOOST_ATOMIC_DETAIL_PPC_HAS_LDARX_STDCX
+#if defined(_ARCH_PWR8)
+// Power8 also has 128-bit instructions
+#define BOOST_ATOMIC_DETAIL_PPC_HAS_LQARX_STQCX
+#endif
+#endif
+
+#endif // defined(__POWERPC__) || defined(__PPC__)
+
+#define BOOST_ATOMIC_INT8_LOCK_FREE 2
+#define BOOST_ATOMIC_INT16_LOCK_FREE 2
+#define BOOST_ATOMIC_INT32_LOCK_FREE 2
+#if defined(BOOST_ATOMIC_DETAIL_PPC_HAS_LDARX_STDCX)
+#define BOOST_ATOMIC_INT64_LOCK_FREE 2
+#endif
+#define BOOST_ATOMIC_POINTER_LOCK_FREE 2
+
+#define BOOST_ATOMIC_THREAD_FENCE 2
+#define BOOST_ATOMIC_SIGNAL_FENCE 2
+
+#endif // BOOST_ATOMIC_DETAIL_CAPS_ARCH_GCC_PPC_HPP_INCLUDED_