yum-mirror/slang

Making it easier to work with shaders

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

Sai Praveen BangaruInitial support for differentiating existential types (#3111)945409c4c

master
branchesmasterall refs →
1.6 KiB68 linesraw
1// Test calling differentiable function through dynamic dispatch.
2
3//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
4//DISABLE_TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
5
6//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
7RWStructuredBuffer<float> outputBuffer;
8
9[anyValueSize(16)]
10interface IInterface : IDifferentiable
11{
12    [Differentiable]
13    float calc(float x);
14}
15
16struct A : IInterface
17{
18    int data1;
19
20    __init(int data1) { this.data1 = data1; }
21
22    [Differentiable]
23    float calc(float x) { return x * x * x * data1; }
24};
25
26struct B : IInterface
27{
28    int data1;
29    int data2;
30
31    __init(int data1, int data2) { this.data1 = data1; this.data2 = data2; }
32
33    [Differentiable]
34    float calc(float x) { return x * x * data1 * data2; }
35};
36
37[Differentiable]
38float doThing(IInterface obj, IInterface obj2, float x)
39{
40    return obj.calc(x);
41}
42
43//TEST_INPUT: type_conformance A:IInterface = 0
44//TEST_INPUT: type_conformance B:IInterface = 1
45
46[numthreads(1, 1, 1)]
47void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
48{
49    {
50        IInterface obj;
51        if (dispatchThreadID.x == 0)
52            obj = A(2);
53        else
54            obj = B(2, 3);
55
56        IInterface obj2 = A(3);
57
58        var dpx = diffPair(1.0);
59        DifferentialPair<IInterface> dpobj = diffPair<IInterface>(obj);
60        DifferentialPair<IInterface> dpobj2 = diffPair<IInterface>(obj2);
61
62        bwd_diff(doThing)(dpobj, dpobj2, dpx, 2.0); // A.calc, expect 12
63
64        IDifferentiable objd = dpobj.d;
65
66        outputBuffer[0] = (isNullDifferential((objd)) ? 1.f : 0.f);
67    }
68}