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https://github.com/intel/compute-runtime.git
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56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
/*
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* Copyright (C) 2019-2022 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#include "shared/source/utilities/cpu_info.h"
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#include "shared/source/os_interface/linux/os_inc.h"
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#include <cstdint>
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#include <fstream>
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#include <sys/auxv.h>
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namespace NEO {
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void cpuidLinuxWrapper(int cpuInfo[4], int functionId) {
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cpuInfo[0] = getauxval(AT_HWCAP);
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}
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void cpuidexLinuxWrapper(int *cpuInfo, int functionId, int subfunctionId) {
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}
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void getCpuFlagsLinux(std::string &cpuFlags) {
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std::ifstream cpuinfo(std::string(Os::sysFsProcPathPrefix) + "/cpuinfo");
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std::string line;
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while (std::getline(cpuinfo, line)) {
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if (line.substr(0, 8) == "Features") {
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cpuFlags = line;
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break;
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}
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}
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}
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void (*CpuInfo::cpuidexFunc)(int *, int, int) = cpuidexLinuxWrapper;
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void (*CpuInfo::cpuidFunc)(int[4], int) = cpuidLinuxWrapper;
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void (*CpuInfo::getCpuFlagsFunc)(std::string &) = getCpuFlagsLinux;
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const CpuInfo CpuInfo::instance;
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void CpuInfo::cpuid(
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uint32_t cpuInfo[4],
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uint32_t functionId) const {
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cpuidFunc(reinterpret_cast<int *>(cpuInfo), functionId);
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}
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void CpuInfo::cpuidex(
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uint32_t cpuInfo[4],
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uint32_t functionId,
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uint32_t subfunctionId) const {
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cpuidexFunc(reinterpret_cast<int *>(cpuInfo), functionId, subfunctionId);
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}
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} // namespace NEO
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