ceph/src/boost/boost/atomic/detail/caps_arch_gcc_aarch64.hpp

   1 /*
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * Copyright (c) 2020 Andrey Semashev
   7  */
   8 /*!
   9  * \file   atomic/detail/caps_arch_gcc_aarch64.hpp
  10  *
  11  * This header defines feature capabilities macros
  12  */
  13
  14 #ifndef BOOST_ATOMIC_DETAIL_CAPS_ARCH_GCC_AARCH64_HPP_INCLUDED_
  15 #define BOOST_ATOMIC_DETAIL_CAPS_ARCH_GCC_AARCH64_HPP_INCLUDED_
  16
  17 #include <boost/atomic/detail/config.hpp>
  18
  19 #ifdef BOOST_HAS_PRAGMA_ONCE
  20 #pragma once
  21 #endif
  22
  23 #if defined(__AARCH64EL__) || \
  24     (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || \
  25     (defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)) || \
  26     defined(BOOST_WINDOWS)
  27 #define BOOST_ATOMIC_DETAIL_AARCH64_LITTLE_ENDIAN
  28 #elif defined(__AARCH64EB__) || \
  29     defined(__ARM_BIG_ENDIAN) || \
  30     (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || \
  31     (defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__))
  32 #define BOOST_ATOMIC_DETAIL_AARCH64_BIG_ENDIAN
  33 #else
  34 #error "Boost.Atomic: Failed to determine AArch64 endianness, the target platform is not supported. Please, report to the developers (patches are welcome)."
  35 #endif
  36
  37 #if defined(__ARM_FEATURE_ATOMICS)
  38 // ARMv8.1 added Large System Extensions, which includes cas, swp, and a number of other read-modify-write instructions
  39 #define BOOST_ATOMIC_DETAIL_AARCH64_HAS_LSE
  40 #endif
  41
  42 #if defined(__ARM_FEATURE_COMPLEX)
  43 // ARMv8.3 added Release Consistency processor consistent (RCpc) memory model, which includes ldapr and similar instructions.
  44 // Unfortunately, there seems to be no dedicated __ARM_FEATURE macro for this, so we use __ARM_FEATURE_COMPLEX, which is also defined starting ARMv8.3.
  45 #define BOOST_ATOMIC_DETAIL_AARCH64_HAS_RCPC
  46 #endif
  47
  48 #define BOOST_ATOMIC_INT8_LOCK_FREE 2
  49 #define BOOST_ATOMIC_INT16_LOCK_FREE 2
  50 #define BOOST_ATOMIC_INT32_LOCK_FREE 2
  51 #define BOOST_ATOMIC_INT64_LOCK_FREE 2
  52 #define BOOST_ATOMIC_INT128_LOCK_FREE 2
  53 #define BOOST_ATOMIC_POINTER_LOCK_FREE 2
  54
  55 #define BOOST_ATOMIC_THREAD_FENCE 2
  56 #define BOOST_ATOMIC_SIGNAL_FENCE 2
  57
  58 #endif // BOOST_ATOMIC_DETAIL_CAPS_ARCH_GCC_AARCH64_HPP_INCLUDED_