New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Fix missing Detection for AVX OS Support #4325

Merged
merged 1 commit into from Mar 23, 2018
Jump to file or symbol
Failed to load files and symbols.
+14 −3
Diff settings

Always

Just for now

View
@@ -15,13 +15,13 @@ bool utils::has_ssse3()
bool utils::has_avx()
{
static const bool g_value = get_cpuid(0, 0)[0] >= 0x1 && get_cpuid(1, 0)[2] & 0x10000000;
static const bool g_value = get_cpuid(0, 0)[0] >= 0x1 && get_cpuid(1, 0)[2] & 0x10000000 && (get_cpuid(1, 0)[2] & 0x0C000000) == 0x0C000000 && (get_xgetbv(0) & 0x6) == 0x6;
return g_value;
}
bool utils::has_avx2()
{
static const bool g_value = get_cpuid(0, 0)[0] >= 0x7 && get_cpuid(7, 0)[1] & 0x20;
static const bool g_value = get_cpuid(0, 0)[0] >= 0x7 && get_cpuid(7, 0)[1] & 0x20 && (get_cpuid(1, 0)[2] & 0x0C000000) == 0x0C000000 && (get_xgetbv(0) & 0x6) == 0x6;
return g_value;
}
@@ -35,7 +35,7 @@ bool utils::has_rtm()
bool utils::has_512()
{
// Check AVX512F, AVX512CD, AVX512DQ, AVX512BW, AVX512VL extensions (Skylake-X level support)
static const bool g_value = get_cpuid(0, 0)[0] >= 0x7 && (get_cpuid(7, 0)[1] & 0xd0030000) == 0xd0030000;
static const bool g_value = get_cpuid(0, 0)[0] >= 0x7 && (get_cpuid(7, 0)[1] & 0xd0030000) == 0xd0030000 && (get_cpuid(1,0)[2] & 0x0C000000) == 0x0C000000 && (get_xgetbv(0) & 0xe6) == 0xe6;
return g_value;
}
View
@@ -16,6 +16,17 @@ namespace utils
return {0u+regs[0], 0u+regs[1], 0u+regs[2], 0u+regs[3]};
}
inline u64 get_xgetbv(u32 xcr)
{
#ifdef _MSC_VER
return _xgetbv(xcr);
#else
u32 eax, edx;
__asm__ volatile( "xgetbv" : "=a"(eax), "=d"(edx) : "c"(xcr));
return eax | (u64(edx) << 32);
#endif
}
bool has_ssse3();
bool has_avx();
ProTip! Use n and p to navigate between commits in a pull request.