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