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//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type -render-features half
2//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type -render-features half
3//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj -output-using-type
4// Not supported in WGSL: Double and other unsupported scalar types
5//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-wgpu
6
7//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
8RWStructuredBuffer<float> outputBuffer;
9
10typedef DifferentialPair<float> dpfloat;
11typedef DifferentialPair<double> dpdouble;
12typedef DifferentialPair<half> dphalf;
13typedef float.Differential dfloat;
14typedef double.Differential ddouble;
15typedef half.Differential dhalf;
16
17[BackwardDifferentiable]
18float f(double x)
19{
20    return (float)x;
21}
22
23[BackwardDifferentiable]
24float h(float x, float y)
25{
26    float m = x + y;
27    float n = x - y;
28    return m * n + 2 * x * y;
29}
30
31[BackwardDifferentiable]
32float j(half x, half y)
33{
34    float m = x / y;
35    return m * y;
36}
37
38[numthreads(1, 1, 1)]
39void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
40{
41    {
42        dpdouble dpa = dpdouble(2.0, 1.0);
43
44        __bwd_diff(f)(dpa, 1.0);
45
46        outputBuffer[0] = (float)dpa.d; // Expect: 1
47    }
48
49    {
50        dpfloat dpa = dpfloat(2.0, 1.0);
51        dpfloat dpb = dpfloat(1.5, 1.0);
52
53        __bwd_diff(h)(dpa, dpb, 1.0);
54
55        outputBuffer[1] = dpa.d; // Expect: (2 * 2.0) + (2 * 1.5) = 7.0
56        outputBuffer[2] = dpb.d; // Expect: -(2 * 1.5) + (2 * 2.0) = 1.0
57    }
58
59    {
60        dphalf dpa = dphalf((half)2.0, (half)1.0);
61        dphalf dpb = dphalf((half)1.5, (half)1.0);
62
63        __bwd_diff(j)(dpa, dpb, 1.0);
64
65        outputBuffer[3] = dpa.d; // Expect: 1
66        outputBuffer[4] = dpb.d; // Expect: 0
67    }
68
69}