Re: [PATCH v3 0/4] MR191: tests: Add more interesting HLSL tests for mipmap levels.

[Giovanni Mascellani (＠giomasce)]

Giovanni Mascellani (@giomasce) commented about tests/sample-bias.shader_test:
> +Texture2D t;
> +uniform float bias;
> -
>
> +float4 main(float2 coord : texcoord) : sv_target
> +{
> - return t.SampleBias(s, coord, bias);
>
> +}
> -
>
> +[test]
> +uniform 0 float4 6.5 0.0 0.0 0.0
> +draw quad
> +probe all rgba (1.0, 0.0, 1.0, 0.0)
> -
>
> +uniform 0 float4 7.5 0.0 0.0 0.0
> +draw quad
> +probe all rgba (0.41015625, 0.0, 1.0, 0.0)

That's going to be a joy...

I get 0.40625 on:
 * WARP on Windows 11
 * Intel on Linux
 * proprietary NVIDIA on Linux

I get 0.41015625 on:
 * RADV on Linux

I get 0.431112289 on:
 * lavapipe on Linux

And we're not speaking of a handful of ULPs...

Not sure what's the best way to deal with this. Ideally I'd like tests to pass on all these platforms. Maybe we can just add a check that it is between 0.4 and 0.45.