99c0a73f91
d0488d932 oaknut: 2.0.0 40ad78bbf oaknut: Implement DualCodeBlock and related support 9f131cfb5 oaknut: add configuration for standalone installation 69799b43c oaknut: Test building for Android on CI 1d51f5512 oaknut: 1.2.2 918bd94f0 oaknut: Eliminate -Wconversion warnings 316d8869e oaknut: Fix edgecases in MOVP2R on +/-4GiB boundary d8634eaa1 oaknut: Fix page boundary error in ADP d0ca9a24e oaknut: Update README examples for CPU feature detection dbeec268b oaknut: feature_detection_freebsd: Warn about incompatibility with earlier FreeBSD versions 86e5386e2 oaknut: feature_detect: Support NetBSD df4cf2d48 oaknut: feature_detect: Support OpenBSD 99dfff25a oaknut: feature_detection: Read ID registers 319b3d2c9 oaknut: Add basic CPU feature detection 23e9ddb4c oaknut: CI: Don't run slow tests on OpenBSD 734f1bdb4 oaknut: CI: Use up-to-date qemu f462c9774 oaknut: CI: Build on OpenBSD 19cd42204 oaknut: code_block: Add NetBSD and OpenBSD support 18b86a3ec oaknut: SystemReg: Add more EL0 accessible registers 53c43bf0c oaknut/tests: Reduce iterations for MOVP2R cc37df19e oaknut: Test on FreeBSD a66b32d26 oaknut: Fix crossing sign boundary in PageOffset 206468d72 oaknut: CI: Add macos-arm64 build e6eecc3f9 oaknut: 1.2.1 4252d8f4a oaknut: CMakeLists: Warnings are errors on MSVC 408eed65f oaknut: arm64_encode_helpers: remove unreachable code bfc8eedfb oaknut: arm64_encode_helpers: p maybe unused ff4456eca oaknut: Avoid negation of unsigned values b4ac8fd6c oaknut: Fix MOV for applications of MOVN 0575cadc4 oaknut: Disable certain functionality where absolute addressing is not available 394a3c8f0 oaknut: Appease MSVC 011183670 oaknut: 1.2.0 e83c9f327 oaknut: Add VectorCodeGenerator 5eb122cc5 oaknut: Tidy up public header 45c5a7b25 oaknut: Fix clang-format errors 36243256f oaknut: Add `const` qualifier to `AddrOffset` ctor 4af500cb5 oaknut: Add `ptr` accessor to `Label` bccb06669 oaknut: CodeGenerator const correctness da0590a86 oaknut: github: Update package repositories git-subtree-dir: externals/oaknut git-subtree-split: d0488d9320ae673167dd9117223e3453d5ff102f
81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
// 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 <array>
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#include <cstddef>
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#include <cstdint>
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#include <optional>
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#include <string>
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#include <aarch64/armreg.h>
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#include <sys/param.h>
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#include <sys/sysctl.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/feature_detection_idregs.hpp"
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#include "oaknut/feature_detection/id_registers.hpp"
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namespace oaknut {
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inline std::optional<id::IdRegisters> read_id_registers(std::size_t core_index)
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{
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const std::string path = "machdep.cpu" + std::to_string(core_index) + ".cpu_id";
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aarch64_sysctl_cpu_id id;
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std::size_t id_len = sizeof id;
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if (sysctlbyname(path.c_str(), &id, &id_len, nullptr, 0) < 0)
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return std::nullopt;
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return id::IdRegisters{
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id.ac_midr,
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id::Pfr0Register{id.ac_aa64pfr0},
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id::Pfr1Register{id.ac_aa64pfr1},
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id::Pfr2Register{0},
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id::Zfr0Register{id.ac_aa64zfr0},
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id::Smfr0Register{0},
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id::Isar0Register{id.ac_aa64isar0},
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id::Isar1Register{id.ac_aa64isar1},
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id::Isar2Register{0},
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id::Isar3Register{0},
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id::Mmfr0Register{id.ac_aa64mmfr0},
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id::Mmfr1Register{id.ac_aa64mmfr1},
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id::Mmfr2Register{id.ac_aa64mmfr2},
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id::Mmfr3Register{0},
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id::Mmfr4Register{0},
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};
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}
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inline std::size_t get_core_count()
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{
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int result = 0;
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size_t result_size = sizeof(result);
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const std::array<int, 2> mib{CTL_HW, HW_NCPU};
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if (sysctl(mib.data(), mib.size(), &result, &result_size, nullptr, 0) < 0)
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return 0;
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return result;
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}
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inline CpuFeatures detect_features()
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{
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std::optional<CpuFeatures> result;
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const std::size_t core_count = get_core_count();
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for (std::size_t core_index = 0; core_index < core_count; core_index++) {
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if (const std::optional<id::IdRegisters> id_regs = read_id_registers(core_index)) {
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const CpuFeatures current_features = detect_features_via_id_registers(*id_regs);
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if (result) {
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result = *result & current_features;
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} else {
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result = current_features;
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}
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}
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}
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return result.value_or(CpuFeatures{});
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}
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} // namespace oaknut
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