Line data    Source code

       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.
      16         116 : void 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         116 :     __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         116 : }
      24             : 
      25             : #endif // defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
      26             : #endif // BITCOIN_COMPAT_CPUID_H