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Update minimum CPU arch requirement on Windows to AVX2 with SSE4.2

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94.48% support on PC according to Steam Hardware & Software Survey: May 2025 (https://store.steampowered.com/hwsurvey/)
This commit is contained in:
Wojtek Figat
2025-06-12 17:03:19 +02:00
parent 4240646ec7
commit 7606c9ac12
6 changed files with 188 additions and 29 deletions
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101
Source/Engine/Platform/Windows/WindowsPlatform.cpp
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@@ -257,6 +257,37 @@ void GetWindowsVersion(String& windowsName, int32& versionMajor, int32& versionM
RegCloseKey(hKey);
}
#if PLATFORM_ARCH_X86 || PLATFORM_ARCH_X64
struct CPUBrand
{
char Buffer[0x40];
CPUBrand()
{
Buffer[0] = 0;
int32 cpuInfo[4];
__cpuid(cpuInfo, 0x80000000);
if (cpuInfo[0] >= 0x80000004)
{
// Get name
for (uint32 i = 0; i < 3; i++)
{
__cpuid(cpuInfo, 0x80000002 + i);
memcpy(Buffer + i * sizeof(cpuInfo), cpuInfo, sizeof(cpuInfo));
}
// Trim ending whitespaces
int32 size = StringUtils::Length(Buffer);
while (size > 1 && Buffer[size - 1] == ' ')
size--;
Buffer[size] = 0;
}
}
};
#endif
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
// Find window to process that message
@@ -517,6 +548,60 @@ void WindowsPlatform::PreInit(void* hInstance)
ASSERT(hInstance);
Instance = hInstance;
#if PLATFORM_ARCH_X86 || PLATFORM_ARCH_X64
// Check the minimum vector instruction set support
int32 cpuInfo[4] = { -1 };
__cpuid(cpuInfo, 0);
int32 cpuInfoSize = cpuInfo[0];
__cpuid(cpuInfo, 1);
bool SSE2 = cpuInfo[3] & (1u << 26);
bool SSE3 = cpuInfo[2] & (1u << 0);
bool SSE41 = cpuInfo[2] & (1u << 19);
bool SSE42 = cpuInfo[2] & (1u << 20);
bool AVX = cpuInfo[2] & (1u << 28);
bool POPCNT = cpuInfo[2] & (1u << 23);
bool AVX2 = false;
if (cpuInfoSize >= 7)
{
__cpuid(cpuInfo, 7);
AVX2 = cpuInfo[1] & (1u << 5) && (_xgetbv(0) & 6) == 6;
}
const Char* missingFeature = nullptr;
#if defined(__AVX__)
if (!AVX)
missingFeature = TEXT("AVX");
#endif
#if defined(__AVX2__)
if (!AVX2)
missingFeature = TEXT("AVX2");
#endif
#if PLATFORM_SIMD_SSE2
if (!SSE2)
missingFeature = TEXT("SSE2");
#endif
#if PLATFORM_SIMD_SSE3
if (!SSE3)
missingFeature = TEXT("SSE3");
#endif
#if PLATFORM_SIMD_SSE4_1
if (!SSE41)
missingFeature = TEXT("SSE4.1");
#endif
#if PLATFORM_SIMD_SSE4_2
if (!SSE42)
missingFeature = TEXT("SSE4.2");
if (!POPCNT)
missingFeature = TEXT("POPCNT");
#endif
if (missingFeature)
{
// Not supported CPU
CPUBrand cpu;
Error(String::Format(TEXT("Cannot start program due to lack of CPU feature {}.\n\n{}"), missingFeature, String(cpu.Buffer)));
exit(-1);
}
#endif
// Disable the process from being showing "ghosted" while not responding messages during slow tasks
DisableProcessWindowsGhosting();
@@ -707,20 +792,8 @@ void WindowsPlatform::LogInfo()
#if PLATFORM_ARCH_X86 || PLATFORM_ARCH_X64
// Log CPU brand
{
char brandBuffer[0x40] = {};
int32 cpuInfo[4] = { -1 };
__cpuid(cpuInfo, 0x80000000);
if (cpuInfo[0] >= 0x80000004)
{
for (uint32 i = 0; i < 3; i++)
{
__cpuid(cpuInfo, 0x80000002 + i);
memcpy(brandBuffer + i * sizeof(cpuInfo), cpuInfo, sizeof(cpuInfo));
}
}
LOG(Info, "CPU: {0}", String(brandBuffer));
}
CPUBrand cpu;
LOG(Info, "CPU: {0}", String(cpu.Buffer));
#endif
LOG(Info, "Microsoft {0} {1}-bit ({2}.{3}.{4})", WindowsName, Platform::Is64BitPlatform() ? TEXT("64") : TEXT("32"), VersionMajor, VersionMinor, VersionBuild);