diff options
Diffstat (limited to 'boost/atomic/detail/hwcaps_gcc_x86.hpp')
| -rw-r--r-- | boost/atomic/detail/hwcaps_gcc_x86.hpp | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/boost/atomic/detail/hwcaps_gcc_x86.hpp b/boost/atomic/detail/hwcaps_gcc_x86.hpp new file mode 100644 index 0000000000..91a1aee3aa --- /dev/null +++ b/boost/atomic/detail/hwcaps_gcc_x86.hpp @@ -0,0 +1,58 @@ +/* + * 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) 2017 Andrey Semashev + */ +/*! + * \file atomic/detail/hwcaps_gcc_x86.hpp + * + * This header defines hardware capabilities macros for x86 + */ + +#ifndef BOOST_ATOMIC_DETAIL_HWCAPS_GCC_X86_HPP_INCLUDED_ +#define BOOST_ATOMIC_DETAIL_HWCAPS_GCC_X86_HPP_INCLUDED_ + +#include <boost/atomic/detail/config.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +#if defined(__GNUC__) + +#if defined(__i386__) &&\ + (\ + defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8) ||\ + defined(__i586__) || defined(__i686__) || defined(__SSE__)\ + ) +#define BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B 1 +#endif + +#if defined(__x86_64__) && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16) +#define BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B 1 +#endif + +#if defined(__x86_64__) || defined(__SSE2__) +// Use mfence only if SSE2 is available +#define BOOST_ATOMIC_DETAIL_X86_HAS_MFENCE 1 +#endif + +#else // defined(__GNUC__) + +#if defined(__i386__) && !defined(BOOST_ATOMIC_NO_CMPXCHG8B) +#define BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B 1 +#endif + +#if defined(__x86_64__) && !defined(BOOST_ATOMIC_NO_CMPXCHG16B) +#define BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B 1 +#endif + +#if !defined(BOOST_ATOMIC_NO_MFENCE) +#define BOOST_ATOMIC_DETAIL_X86_HAS_MFENCE 1 +#endif + +#endif // defined(__GNUC__) + +#endif // BOOST_ATOMIC_DETAIL_HWCAPS_GCC_X86_HPP_INCLUDED_ |