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cpu info check

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find avx2 and avx512
This commit is contained in:
marauder2k7 2026-02-24 15:03:22 +00:00
parent 88da6f60f6
commit b6ea96f367
2 changed files with 25 additions and 5 deletions
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20
Engine/source/platformWin32/winCPUInfo.cpp
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@ -72,13 +72,15 @@ enum CpuFlags
BIT_XSAVE_RESTORE = BIT(27),
BIT_AVX = BIT(28),
BIT_AVX2 = BIT(5),
BIT_AVX512F = BIT(16)
};
static void detectCpuFeatures(Platform::SystemInfo_struct::Processor &processor)
{
S32 cpuInfo[4];
__cpuid(cpuInfo, 1);
//U32 eax = cpuInfo[0]; // eax
int nIds = cpuInfo[0];
U32 edx = cpuInfo[3]; // edx
U32 ecx = cpuInfo[2]; // ecx
@ -90,6 +92,18 @@ static void detectCpuFeatures(Platform::SystemInfo_struct::Processor &processor)
processor.properties |= (ecx & BIT_SSE4_1) ? CPU_PROP_SSE4_1 : 0;
processor.properties |= (ecx & BIT_SSE4_2) ? CPU_PROP_SSE4_2 : 0;
if (nIds >= 7)
{
int ext[4];
__cpuidex(ext, 7, 0);
if (ext[1] & (BIT_AVX2)) // EBX bit 5
processor.properties |= CPU_PROP_AVX2;
if (ext[1] & (BIT_AVX512F)) // AVX-512 Foundation
processor.properties |= CPU_PROP_AVX512;
}
// AVX detection requires that xsaverestore is supported
if (ecx & BIT_XSAVE_RESTORE && ecx & BIT_AVX)
{
@ -176,6 +190,10 @@ void Processor::init()
Con::printf(" SSE4.2 detected" );
if (Platform::SystemInfo.processor.properties & CPU_PROP_AVX)
Con::printf(" AVX detected");
if (Platform::SystemInfo.processor.properties & CPU_PROP_AVX2)
Con::printf(" AVX2 detected");
if (Platform::SystemInfo.processor.properties & CPU_PROP_AVX512)
Con::printf(" AVX512 detected");
if (Platform::SystemInfo.processor.properties & CPU_PROP_MP)
Con::printf(" MultiCore CPU detected [%i cores, %i logical]", Platform::SystemInfo.processor.numPhysicalProcessors, Platform::SystemInfo.processor.numLogicalProcessors);