72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
/* This file is part of the FASTOR library. {{{
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Copyright (c) 2020 Roman Poya
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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}}}*/
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#ifndef CPUID_H
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#define CPUID_H
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#ifdef _WIN32
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#include <limits.h>
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#include <intrin.h>
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typedef unsigned __int32 uint32_t;
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#else
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#include <stdint.h>
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#endif
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namespace Fastor {
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class CPUID {
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uint32_t regs[4];
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public:
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explicit CPUID(unsigned i) {
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#ifdef _WIN32
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__cpuid((int *)regs, (int)i);
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#else
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asm volatile
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("cpuid" : "=a" (regs[0]), "=b" (regs[1]), "=c" (regs[2]), "=d" (regs[3])
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: "a" (i), "c" (0));
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// ECX is set to zero for CPUID function 4
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#endif
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}
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const uint32_t& EAX() const {return regs[0];} // cpu base frequency
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const uint32_t& EBX() const {return regs[1];} // cpu max frequency
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const uint32_t& ECX() const {return regs[2];} // bus (reference) frequency
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const uint32_t& EDX() const {return regs[3];}
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};
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// Usage:
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// CPUID cpuID(0);
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// std::string vendor;
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// vendor += std::string((const char *)&cpuID.EBX(), 4);
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// vendor += std::string((const char *)&cpuID.EDX(), 4);
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// vendor += std::string((const char *)&cpuID.ECX(), 4);
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// std::cout << "CPU vendor = " << vendor << std::endl;
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} // Fastor
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#endif // CPUID_H
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