i2pd/libi2pd/CPU.cpp
R4SAS 7b6aa41ca8
CPU: remove AVX code, switch to __builtin for AES detection (#1959)
* [cpu] remove avx detect and code blocks, try to switch to __builtin
* [cpu] use __builtin_* only on x86 systems
* [cpu] perform check in separate function
* [cpu] set AES definition on MSVC
* update x86 and aes support checks at compile time
* [cmake] update comment about AES on MSVC
2023-08-31 19:52:51 +03:00

59 lines
1.1 KiB
C++

/*
* Copyright (c) 2013-2023, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/
#include "CPU.h"
#include "Log.h"
#if defined(_MSC_VER)
#include <intrin.h>
#ifndef bit_AES
#define bit_AES (1 << 25)
#endif
#endif
namespace i2p
{
namespace cpu
{
bool aesni = false;
inline bool cpu_support_aes()
{
#if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_IX86) || defined(__i386__))
#if defined(_MSC_VER)
int cpu_info[4];
__cpuid(cpu_info, 1);
return ((cpu_info[2] & bit_AES) != 0);
#elif defined(__clang__)
#if __clang_major__ >= 6
__builtin_cpu_init();
#endif
return __builtin_cpu_supports("aes");
#elif defined(__GNUC__)
__builtin_cpu_init();
return __builtin_cpu_supports("aes");
#else
return false;
#endif
#else
return false;
#endif
}
void Detect(bool AesSwitch, bool force)
{
if ((cpu_support_aes() && AesSwitch) || (AesSwitch && force)) {
aesni = true;
}
LogPrint(eLogInfo, "AESNI ", (aesni ? "enabled" : "disabled"));
}
}
}