Re: [PATCH 0/2] MR199: Draft: tests: Make ddxddy.shader_test pass for different GPUs.

[Francisco Casas (＠fcasas)]

On Mon Jun  5 21:41:56 2023 +0000, Giovanni Mascellani wrote:
> My feeling is that these tests are more obscure than they need to be.
> I'd rather have a test for each of the derivative variants (fine, coarse
> and "unspecified"), and test all four the possible positions in a 2x2
> tile in each of the tests. If the results vary wildly, use quantization.
> The point of these tests, I think, is not checking how precisely the
> video card is doing derivatives, but rather check that (in both the HLSL
> compiler and SMx -> SPIR-V compiler) we're correctly passing derivation
> operations over.

Got it. I did just that in !224.