ceph/src/boost/boost/atomic/detail/config.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) 2012 Hartmut Kaiser
   7  * Copyright (c) 2014 Andrey Semashev
   8  */
   9 /*!
  10  * \file   atomic/detail/config.hpp
  11  *
  12  * This header defines configuraion macros for Boost.Atomic
  13  */
  14
  15 #ifndef BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_
  16 #define BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_
  17
  18 #include <boost/config.hpp>
  19
  20 #ifdef BOOST_HAS_PRAGMA_ONCE
  21 #pragma once
  22 #endif
  23
  24 #if defined(__has_builtin)
  25 #if __has_builtin(__builtin_memcpy)
  26 #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCPY
  27 #endif
  28 #if __has_builtin(__builtin_memcmp)
  29 #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCMP
  30 #endif
  31 #elif defined(BOOST_GCC)
  32 #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCPY
  33 #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCMP
  34 #endif
  35
  36 #if defined(BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCPY)
  37 #define BOOST_ATOMIC_DETAIL_MEMCPY __builtin_memcpy
  38 #else
  39 #define BOOST_ATOMIC_DETAIL_MEMCPY std::memcpy
  40 #endif
  41
  42 #if defined(BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCMP)
  43 #define BOOST_ATOMIC_DETAIL_MEMCMP __builtin_memcmp
  44 #else
  45 #define BOOST_ATOMIC_DETAIL_MEMCMP std::memcmp
  46 #endif
  47
  48 #if defined(__CUDACC__)
  49 // nvcc does not support alternatives in asm statement constraints
  50 #define BOOST_ATOMIC_DETAIL_NO_ASM_CONSTRAINT_ALTERNATIVES
  51 // nvcc does not support condition code register ("cc") clobber in asm statements
  52 #define BOOST_ATOMIC_DETAIL_NO_ASM_CLOBBER_CC
  53 #endif
  54
  55 #if !defined(BOOST_ATOMIC_DETAIL_NO_ASM_CLOBBER_CC)
  56 #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC "cc"
  57 #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "cc",
  58 #else
  59 #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
  60 #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA
  61 #endif
  62
  63 #if ((defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 403)) ||\
  64     (defined(BOOST_GCC) && (BOOST_GCC+0) >= 70000) /* gcc 7 emits assembler warnings when zero displacement is implied */ ||\
  65     defined(__SUNPRO_CC)
  66 // This macro indicates we're using older binutils that don't support implied zero displacements for memory opereands,
  67 // making code like this invalid:
  68 //   movl 4+(%%edx), %%eax
  69 #define BOOST_ATOMIC_DETAIL_NO_ASM_IMPLIED_ZERO_DISPLACEMENTS
  70 #endif
  71
  72 #if defined(__clang__) || (defined(BOOST_GCC) && (BOOST_GCC+0) < 40500) || defined(__SUNPRO_CC)
  73 // This macro indicates that the compiler does not support allocating rax:rdx register pairs ("A") in asm blocks
  74 #define BOOST_ATOMIC_DETAIL_NO_ASM_RAX_RDX_PAIRS
  75 #endif
  76
  77 #if defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  78 #if !(defined(BOOST_LIBSTDCXX11) && (BOOST_LIBSTDCXX_VERSION+0) >= 40700) /* libstdc++ from gcc >= 4.7 in C++11 mode */
  79 // This macro indicates that there is no <type_traits> standard header that is sufficient for Boost.Atomic needs.
  80 #define BOOST_ATOMIC_DETAIL_NO_CXX11_HDR_TYPE_TRAITS
  81 #endif
  82 #endif // defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  83
  84 // Enable pointer/reference casts between storage and value when possible.
  85 // Note: Despite that MSVC does not employ strict aliasing rules for optimizations
  86 // and does not require an explicit markup for types that may alias, we still don't
  87 // enable the optimization for this compiler because at least MSVC-8 and 9 are known
  88 // to generate broken code sometimes when casts are used.
  89 #define BOOST_ATOMIC_DETAIL_MAY_ALIAS BOOST_MAY_ALIAS
  90 #if !defined(BOOST_NO_MAY_ALIAS)
  91 #define BOOST_ATOMIC_DETAIL_STORAGE_TYPE_MAY_ALIAS
  92 #endif
  93
  94 #if defined(__GCC_ASM_FLAG_OUTPUTS__)
  95 // The compiler supports output values in flag registers.
  96 // See: https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html, Section 6.44.3.
  97 #define BOOST_ATOMIC_DETAIL_ASM_HAS_FLAG_OUTPUTS
  98 #endif
  99
 100 #if defined(__has_builtin)
 101 #if __has_builtin(__builtin_constant_p)
 102 #define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) __builtin_constant_p(x)
 103 #endif
 104 #elif defined(__GNUC__)
 105 #define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) __builtin_constant_p(x)
 106 #endif
 107
 108 #if !defined(BOOST_ATOMIC_DETAIL_IS_CONSTANT)
 109 #define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) false
 110 #endif
 111
 112 #endif // BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_