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(filecheck-buffer=CHECK):-slang -compute -shaderobj -output-using-type
2//TEST(compute, vulkan):COMPARE_COMPUTE_EX(filecheck-buffer=CHECK):-vk -compute -shaderobj -output-using-type
3//TEST(compute):COMPARE_COMPUTE_EX(filecheck-buffer=CHECK):-cuda -compute -shaderobj -output-using-type
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8typedef DifferentialPair<float> dpfloat;
9
10struct Foo : IDifferentiable
11{
12    float a;
13    int b;
14}
15
16[PreferCheckpoint]
17float k()
18{
19    return outputBuffer[3] + 1;
20}
21
22[Differentiable]
23void h(float x, float y, out Foo result)
24{
25    float p = no_diff k();
26    float m = x + y + p;
27    float n = x - y;
28    float r = m * n + 2 * x * y;
29
30    result = {r, 2};
31}
32
33[numthreads(1, 1, 1)]
34void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
35{
36    float x = 2.0;
37    float y = 3.5;
38    float dx = 1.0;
39    float dy = 0.5;
40
41    dpfloat dresult;
42    dpfloat dpx = diffPair(x);
43    dpfloat dpy = diffPair(y);
44    Foo.Differential dFoo;
45    dFoo.a = 1.0;
46    bwd_diff(h)(dpx, dpy, dFoo);
47
48    outputBuffer[0] = dpx.d; // CHECK: 12.0
49    outputBuffer[1] = dpy.d; // CHECK: -4.0
50}