URGE does not work without SEE 4.2

[CheYoki]

Description:

The application crashes on startup with 0xC000001D: Illegal Instruction on older CPUs (e.g., Intel E5200) that do not support the SSE4.2 instruction set.

Cause:

The crash occurs in Diligent::WindowsMisc::CountOneBits (Win32PlatformMisc.hpp) due to the use of the __popcnt intrinsic. This instruction (POPCNT) is not available on such CPUs. The error happens during D3D11 initialization, when creating the swapchain.

Impact:

Prevents the application from running on hardware without SSE4.2 support.

Functional Workaround:

Replacing the call to __popcnt(Val) with BasicPlatformMisc::CountOneBits(Val) in Win32PlatformMisc.hpp (third_party\DiligentCore\Platforms\Win32\interface\Win32PlatformMisc.hpp) resolves the crash. The performance impact is unknown.

Environment:

• CPU: Intel Pentium E5200
• GPU: GT 710
• API: Direct3D 11
• Compiler: Visual Studio 2022 (17.13)

It would be helpful to include a note in the README.md indicating that SSE 4.2 support is required.
This would help users with older hardware avoid confusion or unexpected crashes at startup.

[Admenri]

Thanks for feedback, I forked DiligentCore.
Because of the popular of SSE4.2, I apply the issue with a enhancement label.

[R-YaTian]

May fixed via commit #a116caa. Please try again.

[CheYoki]

I just compiled with the latest version of the repository and nothing, it still closes instantly. I guess I'll make a pull request to the DiligentCore fork so that if __popcnt is not available, it uses BasicPlatformMisc::CountOneBits instead. I did what I mentioned earlier, and it opened correctly.

And I think that due to the new .arb (PhysFS) stuff, it's no longer possible to do much with a custom build. At least, it gives me an error because of it (I think):

Debug Assertion Failed!

Program: C:\Users\Admin\Downloads\temp\Test\Game.exe
File: minkernel\crts\ucrt\src\appcrt\lowio\dup2.cpp
Line: 65

Expression: (_osfile(source_fh) & FOPEN)

Edit: It turns out the problem occurs when printing to the console.
My temporary solution is simply to add:

def puts(*args)
end

def p(*args)
end