64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*
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Copyright (c) 2014, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_CPUID_HPP_INCLUDED
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#define TORRENT_CPUID_HPP_INCLUDED
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#include "libtorrent/config.hpp"
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#include <cstring>
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#if defined _MSC_VER && TORRENT_HAS_SSE
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#include <intrin.h>
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#include <nmmintrin.h>
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#endif
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namespace libtorrent
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{
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inline void cpuid(unsigned int info[4], int type)
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{
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#if TORRENT_HAS_SSE && defined _MSC_VER
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__cpuid((int*)info, type);
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#elif TORRENT_HAS_SSE && defined __GNUC__
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asm volatile
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("cpuid" : "=a" (info[0]), "=b" (info[1]), "=c" (info[2]), "=d" (info[3])
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: "a" (type), "c" (0));
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#else
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// for non-x86 and non-amd64, just return zeroes
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std::memset(&info[0], 0, sizeof(unsigned int) * 4);
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#endif
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}
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}
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#endif // TORRENT_CPUID_HPP_INCLUDED
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