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82 lines
3.2 KiB
C++
82 lines
3.2 KiB
C++
/* Copyright (C) 2021 Kasm Web
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#ifndef __RFB_CPUID_H__
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#define __RFB_CPUID_H__
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#include <algorithm>
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#include <libcpuid/libcpuid.h>
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namespace cpu_info {
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//using namespace cpu_features;
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//static const X86Info info = GetX86Info();
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// static const X86Microarchitecture uarch = GetX86Microarchitecture(&info);
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//static const bool has_fast_avx = info.features.avx && uarch != INTEL_SNB;
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bool supportsSSE2();
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bool supportsAVX512f();
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class CpuFeatures {
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cpu_id_t data{};
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CpuFeatures();
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public:
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CpuFeatures(const CpuFeatures &) = delete;
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CpuFeatures &operator=(const CpuFeatures &) = delete;
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CpuFeatures(CpuFeatures &&) = delete;
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CpuFeatures &operator=(CpuFeatures &&) = delete;
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static CpuFeatures &get()
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{
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static CpuFeatures instance{};
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return instance;
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}
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[[nodiscard]] bool has_sse2() const { return data.flags[CPU_FEATURE_SSE2]; }
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[[nodiscard]] bool has_sse4_1() const { return data.flags[CPU_FEATURE_SSE4_1]; }
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[[nodiscard]] bool has_sse4_2() const { return data.flags[CPU_FEATURE_SSE4_2]; }
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[[nodiscard]] bool has_sse4a() const { return data.flags[CPU_FEATURE_SSE4A]; }
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[[nodiscard]] bool has_avx() const { return data.flags[CPU_FEATURE_AVX]; }
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[[nodiscard]] bool has_avx2() const { return data.flags[CPU_FEATURE_AVX2]; }
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[[nodiscard]] bool has_avx512f() const { return data.flags[CPU_FEATURE_AVX512F]; }
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[[nodiscard]] bool has_smt() const { return get_total_cpu_count() > get_cores_count(); }
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[[nodiscard]] uint16_t get_total_cpu_count() const { return std::max(1, data.total_logical_cpus); }
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[[nodiscard]] uint16_t get_cores_count() const { return std::max(1, data.num_cores); }
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};
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inline static const bool has_sse2 = CpuFeatures::get().has_sse2();
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inline static const bool has_sse4_1 = CpuFeatures::get().has_sse4_1();
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inline static const bool has_sse4_2 = CpuFeatures::get().has_sse4_2();
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inline static const bool has_sse4a = CpuFeatures::get().has_sse4a();
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inline static const bool has_avx = CpuFeatures::get().has_avx();
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inline static const bool has_avx2 = CpuFeatures::get().has_avx2();
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inline static const bool has_avx512f = CpuFeatures::get().has_avx512f();
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inline static const uint16_t cores_count = CpuFeatures::get().get_cores_count();
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inline static const uint16_t total_cpu_count = CpuFeatures::get().get_total_cpu_count();
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}; // namespace cpu_info
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#endif
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