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45 lines
959 B
C++
45 lines
959 B
C++
/*
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* Copyright (C) 2021-2022 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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#ifndef BIT
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#define BIT(x) (1ull << (x))
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#endif
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namespace NEO {
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void CpuInfo::detect() const {
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uint32_t cpuInfo[4] = {};
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cpuid(cpuInfo, 0u);
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auto numFunctionIds = cpuInfo[0];
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if (numFunctionIds >= 1u) {
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cpuid(cpuInfo, 1u);
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{
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features |= cpuInfo[3] & BIT(19) ? featureClflush : featureNone;
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}
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}
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if (numFunctionIds >= 7u) {
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cpuid(cpuInfo, 7u);
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{
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auto mask = BIT(5) | BIT(3) | BIT(8);
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features |= (cpuInfo[1] & mask) == mask ? featureAvX2 : featureNone;
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}
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}
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cpuid(cpuInfo, 0x80000000);
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auto maxExtendedId = cpuInfo[0];
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if (maxExtendedId >= 0x80000008) {
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cpuid(cpuInfo, 0x80000008);
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{
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virtualAddressSize = (cpuInfo[0] >> 8) & 0xFF;
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}
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}
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}
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} // namespace NEO
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