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vkd3d-shader/hlsl: Reinterpret minimum precision types as their regular counterparts.

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Reinterpret min16float, min10float, min16int, min12int, and min16uint
as their regular counterparts: float, float, int, int, uint,
respectively.

A proper implementation would require adding minimum precision
indicators to all the dxbc-tpf instructions that use these types.
Consider the output of fxc 10.1 with the following shader:

    uniform int i;

    float4 main() : sv_target
    {
        min16float4 a = {0, 1, 2, i};
        min16int2 b = {4, i};
        min10float3 c = {6.4, 7, i};
        min12int d = 9.4;
        min16uint4x2 e = {14.4, 15, 16, 17, 18, 19, 20, i};

        return mul(e, b) + a + c.xyzx + d;
    }

However, if the graphics driver doesn't have minimum precision support,
it ignores the minimum precision indicators and runs at 32-bit
precision, which is equivalent as working with regular types.
This commit is contained in:
Francisco Casas
2022-12-07 18:06:06 -03:00
committed by Alexandre Julliard
parent 4ce6a17053
commit 404a2d6a3d
Notes: Alexandre Julliard 2023-01-25 22:43:55 +01:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/58
4 changed files with 85 additions and 7 deletions
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6
tests/minimum-precision.shader_test
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@@ -2,7 +2,7 @@
shader model >= 4.0
[pixel shader todo]
[pixel shader]
float4 main() : sv_target
{
min16float4 a = {0, 1, 2, 3};
@@ -17,5 +17,5 @@ float4 main() : sv_target
}
[test]
todo draw quad
todo probe all rgba (197.0, 218.0, 238.0, 257.0)
draw quad
probe all rgba (197.0, 218.0, 238.0, 257.0)