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Optimize cpuid

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This commit is contained in:
Nekotekina 2017-11-09 20:33:18 +03:00
parent 9bc0ec586a
commit 916851bd4a
2 changed files with 23 additions and 14 deletions
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21
Utilities/sysinfo.cpp
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@ -7,6 +7,25 @@
#include <unistd.h> #include <unistd.h>
#endif #endif
bool utils::has_ssse3()
{
static const bool g_value = get_cpuid(0, 0)[0] >= 0x1 && get_cpuid(1, 0)[2] & 0x200;
return g_value;
}
bool utils::has_avx()
{
static const bool g_value = get_cpuid(0, 0)[0] >= 0x1 && get_cpuid(1, 0)[2] & 0x10000000;
return g_value;
}
bool utils::has_rtm()
{
// Check RTM and MPX extensions in order to filter out TSX on Haswell CPUs
static const bool g_value = get_cpuid(0, 0)[0] >= 0x7 && (get_cpuid(7, 0)[1] & 0x4800) == 0x4800;
return g_value;
}
std::string utils::get_system_info() std::string utils::get_system_info()
{ {
std::string result; std::string result;
@ -49,7 +68,7 @@ std::string utils::get_system_info()
if (has_avx()) if (has_avx())
{ {
result += " | AVX"; result += " | AVX+";
} }
if (has_rtm()) if (has_rtm())

16
Utilities/sysinfo.h
View File

@ -16,21 +16,11 @@ namespace utils
return {0u+regs[0], 0u+regs[1], 0u+regs[2], 0u+regs[3]}; return {0u+regs[0], 0u+regs[1], 0u+regs[2], 0u+regs[3]};
} }
inline bool has_ssse3() bool has_ssse3();
{
return get_cpuid(0, 0)[0] >= 0x1 && get_cpuid(1, 0)[2] & 0x200;
}
inline bool has_avx() bool has_avx();
{
return get_cpuid(0, 0)[0] >= 0x1 && get_cpuid(1, 0)[2] & 0x10000000;
}
inline bool has_rtm() bool has_rtm();
{
// Check RTM and MPX extensions in order to filter out TSX on Haswell CPUs
return get_cpuid(0, 0)[0] >= 0x7 && (get_cpuid(7, 0)[1] & 0x4800) == 0x4800;
}
inline bool transaction_enter() inline bool transaction_enter()
{ {