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vkd3d-shader/hlsl: Fold some general unary identities.

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The following unary identities are applied:

  ||x|| -> |x|
  |-x| -> |x|
  ~(~x) -> x
  f(g(x)) -> g(x), where f(), g() are floor() or ceil() functions.
  -(-x) -> x
  !!x -> x
  !(x == y) -> x != y, !(x < y) -> x >= y, etc (for integers).
This commit is contained in:
Shaun Ren
2025-07-28 21:51:09 -04:00
committed by Henri Verbeet
parent 45e549c1b2
commit 245430002a
Notes: Henri Verbeet 2025-08-21 16:34:36 +02:00 
Approved-by: Francisco Casas (@fcasas)
Approved-by: Elizabeth Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1648
5 changed files with 197 additions and 2 deletions
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31
tests/hlsl/arithmetic-float-uniform.shader_test
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@@ -127,6 +127,37 @@ uniform 8 float4 1.00000007 -1.0 0.5 -0.5
todo(msl & sm>=6) draw quad
probe (0, 0) rgba (2.62500048, 209.5, 17.0, 224.5) 1
[pixel shader]
uniform float4 a;
float4 main() : sv_target
{
return float4(abs(abs(a.x)), abs(-a.y), -(-a.z), 0);
}
[test]
uniform 0 float4 -1.0 -2.0 -3.0 0.0
draw quad
probe (0, 0) f32(1.0, 2.0, -3.0, 0.0)
[pixel shader]
uniform float4 a;
float4 main() : sv_target
{
float4 ret;
ret.x = floor(floor(a.x));
ret.y = floor(ceil(a.y));
ret.z = ceil(floor(a.z));
ret.w = ceil(ceil(a.w));
return ret;
}
[test]
uniform 0 float4 1.5 1.5 -1.5 -1.5
draw quad
probe (0, 0) f32(1.0, 2.0, -2.0, -1.0)
[require]
shader model >= 5.0
float64