Re: [PATCH 0/1] MR669: vkd3d-shader/hlsl: Implement ternary operator for older vertex profiles.

[Zebediah Figura (＠zfigura)]

"slt" is only valid for vertex shaders.

We've been rather lax about this so far, which isn't great. But we definitely shouldn't be using VS-only instructions in a pixel shader.

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https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/669#note_62332