rsx: Simulate attribute interpolation on NVIDIA where SM6.1 is supported

[kd-11]

Solves the extremely infuriating attribute interpolation drift issue on NVIDIA hardware. Unfortunately this has some limitations:

1. It only applies to the FS stage. VS stage on NVIDIA also has some issues but the older workaround handles that well.
2. This is only supported on SM6.1 hardware (turing+). Older GPUs will fall back to the hacky compare workaround that fails in some corner cases.

Fixes #8440

[kd-11]

I don't actually own an NVIDIA card with support for this, so I need testers to verify that it works as intended.

[kd-11]

Forgot about linux :p

[kd-11]

Forgot about linux :p

Hmm, compiles fine actually. This seems to be a SDK header version problem.
I'll provide a workaround and upgrade the CI later.

[kd-11]

I notice the Draft. But I tested thinking it's ready to test awaiting results. So far everything I boot gives this ·F 0:00:21.864931 {RSX [0x005e2dc]} SIG: Thread terminated due to fatal error: Failed to compile fragment shader (in file C:\Users\ContainerAdministrator\AppData\Local\Temp\cirrus-ci-build\rpcs3\Emu\RSX\VK\VKProgramPipeline.cpp:29[:25], in function compile) Kingdom hearts.log Dante's inferno.log NFS Rivals.log

We're having some issues with CI builds. It'll be sorted out soon. This bug only affects builds compiled with our automated tools, if you compile the code locally it works fine.

[kd-11]

@Darkhost1999 You can try the new build.

[Darkhost1999]

Thanks was struggling with soundtouch when doing git checkout.

[kd-11]

Fixed the CI issues. Retest.

[Darkhost1999]

Everything is slow and audio crackles even on lightweight games like Lego HP.

RPCS3.log.gz
Luckily it doesn't discriminate

[Darkhost1999]

Skyrim performance is less effected but this issue shows a reappearance (map background screen yellow)

RPCS3.log.gz

[kd-11]

@Darkhost1999 Is the issue fixed by setting shader quality to low?

[Darkhost1999]

It seems the skyrim one is yes.

[kd-11]

What about the slow performance?

[Darkhost1999]

Sorry I wasn't able to test performance till now

RPCS3.log
But Dante, NFS, and Lego hp + others work same performance as before PR with low shader accuracy

[Darkhost1999]

I had grabbed a new .exe from from cirrus just recently and the games where performance regressed are all working full speed without the slow down.
It was immediate in my testing to notice just launching a game. But now it's just working same as master.
Idk what to say. But it's working fine. No lower shader accuracy with the new .exe

[Darkhost1999]

I don't have mass effect so still needs testing from one of those users to test if fixes issue

[kd-11]

It could be shader compilation slowdown. This build bumps the shader cache version.

[Darkhost1999]

That's true so I tested other rooms and even removed cache. Shader compilation is slower but not as bad as originally shown

[kd-11]

Merged to fix broken master builds due to glslang breakage.
Let's keep tracking the skyrim bug in a ticket.