yum-mirror/slang

Making it easier to work with shaders

git clone https://git.yummers.dev/yum-mirror/slang

Harsh Aggarwal (NVIDIA)Fix 7723 - Add autodiff tests (#7919)d10732742

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1.1 KiB61 linesraw
1//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
2//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj -output-using-type
3
4//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
5
6RWStructuredBuffer<float> outputBuffer;
7
8[BackwardDifferentiable]
9float bsdf()
10{
11    return 0.5;
12}
13
14[ForwardDerivativeOf(bsdf)]
15DifferentialPair<float> d_bsdf()
16{
17    return diffPair(0.5f, 1.0f);
18}
19
20[BackwardDerivativeOf(bsdf)]
21void d_bsdf(float dOut)
22{
23    outputBuffer[0] += dOut;
24}
25
26[BackwardDifferentiable]
27float tracePath()
28{
29    float thp = 1.0;
30    float L = 0.0;
31
32    uint depth = 0;
33
34    for (int i = 0; i < 3; ++i)
35    {
36        if (depth <= 2)
37        {
38            thp = thp * bsdf();
39
40            L = thp * 1.0;
41
42            if (depth >= 2) break;
43
44            depth = depth + 1;
45        }
46        else
47        {
48            L = 0.0;
49        }
50    }
51    
52    return L;
53}
54
55[numthreads(1, 1, 1)]
56void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
57{
58    {
59        __bwd_diff(tracePath)(1.0); // Expect: 1.0 in outputBuffer[0]
60    }
61}