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Fix missing Detection for AVX OS Support

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This commit is contained in:
Birk Magnussen 2018-03-23 23:08:13 +01:00 committed by Ivan
parent 32d38a4633
commit c5caaa9211
2 changed files with 14 additions and 3 deletions
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6
Utilities/sysinfo.cpp
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@ -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;
}

11
Utilities/sysinfo.h
View File

@ -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();