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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1.4 KiB55 linesraw
1// Test calling backward differentiable function through dynamic dispatch.
2
3//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
4//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
5//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj -output-using-type
6
7//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
8RWStructuredBuffer<float> outputBuffer;
9
10[anyValueSize(16)]
11interface IInterface
12{
13    [BackwardDifferentiable]
14    float calc(float x);
15}
16
17struct A : IInterface
18{
19    float a;
20    [BackwardDifferentiable]
21    [NoDiffThis]
22    float calc(float x) { return a*x*x; }
23};
24
25struct B : IInterface
26{
27    float a;
28    [BackwardDifferentiable]
29    [NoDiffThis]
30    float calc(float x) { return a*x*x*x; }
31};
32
33[BackwardDifferentiable]
34float run(IInterface obj, float x)
35{
36    return obj.calc(x);
37}
38
39//TEST_INPUT: type_conformance A:IInterface = 0
40//TEST_INPUT: type_conformance B:IInterface = 1
41
42[numthreads(1, 1, 1)]
43void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
44{
45    var obj = createDynamicObject<IInterface>(dispatchThreadID.x, 0.5f); // A
46    var p = diffPair(3.0);
47
48    __bwd_diff(run)(obj, p, 1.0f);
49    outputBuffer[0] = p.d; // A.calc, expect 3
50
51    obj = createDynamicObject<IInterface>(dispatchThreadID.x + 1, 1.5f); // B
52    p = diffPair(3.0);
53    __bwd_diff(run)(obj, p, 1.0f);
54    outputBuffer[1] = p.d; // B.calc, expect 40.5
55}