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/usr/include/boost/beast/core/detail

Name	Size	Mode	Actions
impl/	-	0755	rm
allocator.hpp	945	0644	edit dl rm
async_base.hpp	901	0644	edit dl rm
base64.hpp	1942	0644	edit dl rm
base64.ipp	6170	0644	edit dl rm
bind_continuation.hpp	3504	0644	edit dl rm
bind_default_executor.hpp	3243	0644	edit dl rm
bind_handler.hpp	10959	0644	edit dl rm
buffer.hpp	1825	0644	edit dl rm
buffers_pair.hpp	2636	0644	edit dl rm
buffers_range_adaptor.hpp	2651	0644	edit dl rm
buffers_ref.hpp	1648	0644	edit dl rm
buffer_traits.hpp	2095	0644	edit dl rm
chacha.hpp	4167	0644	edit dl rm
char_buffer.hpp	1407	0644	edit dl rm
clamp.hpp	1229	0644	edit dl rm
config.hpp	2884	0644	edit dl rm
cpu_info.hpp	1787	0644	edit dl rm
flat_stream.hpp	1919	0644	edit dl rm
get_io_context.hpp	2338	0644	edit dl rm
is_invocable.hpp	1888	0644	edit dl rm
ostream.hpp	7004	0644	edit dl rm
pcg.hpp	1464	0644	edit dl rm
read.hpp	9217	0644	edit dl rm
remap_post_to_defer.hpp	2152	0644	edit dl rm
service_base.hpp	850	0644	edit dl rm
sha1.hpp	1624	0644	edit dl rm
sha1.ipp	7998	0644	edit dl rm
static_const.hpp	1154	0644	edit dl rm
static_ostream.hpp	3030	0644	edit dl rm
static_string.hpp	3030	0644	edit dl rm
stream_base.hpp	2685	0644	edit dl rm
stream_traits.hpp	2796	0644	edit dl rm
string.hpp	898	0644	edit dl rm
temporary_buffer.hpp	1611	0644	edit dl rm
tuple.hpp	2194	0644	edit dl rm
type_traits.hpp	2779	0644	edit dl rm
variant.hpp	4889	0644	edit dl rm
varint.hpp	1712	0644	edit dl rm
win32_unicode_path.hpp	2148	0644	edit dl rm
work_guard.hpp	1851	0644	edit dl rm

Edit: /usr/include/boost/beast/core/detail/cpu_info.hpp (1787B)

//
// Copyright (c) 2017 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// 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)
//
// Official repository: https://github.com/boostorg/beast
//

#ifndef BOOST_BEAST_DETAIL_CPU_INFO_HPP
#define BOOST_BEAST_DETAIL_CPU_INFO_HPP

#include <boost/config.hpp>

#ifndef BOOST_BEAST_NO_INTRINSICS
# if defined(BOOST_MSVC) || ((defined(BOOST_GCC) || defined(BOOST_CLANG)) && defined(__SSE4_2__))
#  define BOOST_BEAST_NO_INTRINSICS 0
# else
#  define BOOST_BEAST_NO_INTRINSICS 1
# endif
#endif

#if ! BOOST_BEAST_NO_INTRINSICS

#ifdef BOOST_MSVC
#include <intrin.h> // __cpuid
#else
#include <cpuid.h>  // __get_cpuid
#endif

namespace boost {
namespace beast {
namespace detail {

/*  Portions from Boost,
    Copyright Andrey Semashev 2007 - 2015.
*/
template<class = void>
void
cpuid(
    std::uint32_t id,
    std::uint32_t& eax,
    std::uint32_t& ebx,
    std::uint32_t& ecx,
    std::uint32_t& edx)
{
#ifdef BOOST_MSVC
    int regs[4];
    __cpuid(regs, id);
    eax = regs[0];
    ebx = regs[1];
    ecx = regs[2];
    edx = regs[3];
#else
    __get_cpuid(id, &eax, &ebx, &ecx, &edx);
#endif
}

struct cpu_info
{
    bool sse42 = false;

cpu_info();
};

inline
cpu_info::
cpu_info()
{
    constexpr std::uint32_t SSE42 = 1 << 20;

std::uint32_t eax = 0;
    std::uint32_t ebx = 0;
    std::uint32_t ecx = 0;
    std::uint32_t edx = 0;

cpuid(0, eax, ebx, ecx, edx);
    if(eax >= 1)
    {
        cpuid(1, eax, ebx, ecx, edx);
        sse42 = (ecx & SSE42) != 0;
    }
}

template<class = void>
cpu_info const&
get_cpu_info()
{
    static cpu_info const ci;
    return ci;
}

} // detail
} // beast
} // boost

#endif

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