Bitcoin Core 28.99.0
P2P Digital Currency
cpuid.h
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1// Copyright (c) 2017-2022 The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_COMPAT_CPUID_H
6#define BITCOIN_COMPAT_CPUID_H
7
8#if defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
9#define HAVE_GETCPUID
10
11#include <cpuid.h>
12
13#include <cstdint>
14
15// We can't use cpuid.h's __get_cpuid as it does not support subleafs.
16void static inline GetCPUID(uint32_t leaf, uint32_t subleaf, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d)
17{
18#ifdef __GNUC__
19 __cpuid_count(leaf, subleaf, a, b, c, d);
20#else
21 __asm__ ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(leaf), "2"(subleaf));
22#endif
23}
24
25#endif // defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
26#endif // BITCOIN_COMPAT_CPUID_H