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Merge pull request #6 from jquesnelle/aesni-check

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Checks cpuid to see if AES-NI instructions are supported
This commit is contained in:
fireice-uk
2017-01-05 20:17:21 +00:00
committed by GitHub
parent 94ee3da943 51c4956110
commit 4ee8f08851
1 changed files with 20 additions and 0 deletions
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minethd.cpp
+20
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@@ -21,6 +21,7 @@
#ifdef _WIN32
#include <windows.h>
#include <intrin.h>
void thd_setaffinity(std::thread::native_handle_type h, uint64_t cpu_id)
{
@@ -29,6 +30,7 @@ void thd_setaffinity(std::thread::native_handle_type h, uint64_t cpu_id)
#else
#include <pthread.h>
#include <cpuid.h>
void thd_setaffinity(std::thread::native_handle_type h, uint64_t cpu_id)
{
@@ -172,8 +174,26 @@ cryptonight_ctx* minethd_alloc_ctx()
return nullptr; //Should never happen
}
static bool check_for_aesni()
{
constexpr int AESNI_BIT = 1 << 25;
int cpu_info[4];
#ifdef _WIN32
__cpuid(cpu_info, 1);
#else
__cpuid(1, cpu_info[0], cpu_info[1], cpu_info[2], cpu_info[3]);
#endif
return (cpu_info[2] & AESNI_BIT) != 0;
}
bool minethd::self_test()
{
if (!check_for_aesni())
{
printer::inst()->print_msg(L0, "Your CPU does not support the AES-NI instruction set");
return false;
}
alloc_msg msg = { 0 };
size_t res;
bool fatal = false;