46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
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// SPDX-FileCopyrightText: Copyright (c) 2023 merryhime <https://mary.rs>
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <optional>
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#include <sys/auxv.h>
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#include "oaknut/feature_detection/cpu_feature.hpp"
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#include "oaknut/feature_detection/feature_detection_hwcaps.hpp"
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#include "oaknut/feature_detection/id_registers.hpp"
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#include "oaknut/feature_detection/read_id_registers_directly.hpp"
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#ifndef AT_HWCAP
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# define AT_HWCAP 16
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#endif
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#ifndef AT_HWCAP2
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# define AT_HWCAP2 26
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#endif
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namespace oaknut {
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inline CpuFeatures detect_features_via_hwcap()
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{
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const unsigned long hwcap = ::getauxval(AT_HWCAP);
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const unsigned long hwcap2 = ::getauxval(AT_HWCAP2);
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return detect_features_via_hwcap(hwcap, hwcap2);
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}
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inline CpuFeatures detect_features()
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{
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return detect_features_via_hwcap();
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}
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inline std::optional<id::IdRegisters> read_id_registers()
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{
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constexpr unsigned long hwcap_cpuid = (1 << 11);
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if (::getauxval(AT_HWCAP) & hwcap_cpuid) {
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return id::read_id_registers_directly();
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}
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return std::nullopt;
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}
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} // namespace oaknut
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