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
2//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
3//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj -output-using-type
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8struct B : IDifferentiable
9{
10    typedef B Differential;
11
12    float z;
13};
14
15struct A : IDifferentiable
16{
17    typedef B Differential;
18    
19    [DerivativeMember(B.z)]
20    float x;
21    no_diff float y;
22
23    [__unsafeForceInlineEarly]
24    static Differential dzero()
25    {
26        B b = {0.0};
27        return b;
28    }
29
30    [__unsafeForceInlineEarly]
31    static Differential dadd(Differential a, Differential b)
32    {
33        B o = {a.z + b.z};
34        return o;
35    }
36
37    [__unsafeForceInlineEarly]
38    static Differential dmul<T : __BuiltinRealType>(T a, Differential b)
39    {
40        B o = {__realCast<float, T>(a) * b.z};
41        return o;
42    }
43};
44
45typedef DifferentialPair<A> dpA;
46
47[ForwardDifferentiable]
48A f(A a)
49{
50    A aout;
51    aout.y = detach(2 * a.x);
52    aout.x = 5 * a.x;
53
54    return aout;
55}
56
57[numthreads(1, 1, 1)]
58void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
59{
60    {
61        A a = {1.0, 2.0};
62        B b = {0.2};
63
64        dpA dpa = dpA(a, b);
65
66        outputBuffer[0] = __fwd_diff(f)(dpa).d.z;                    // Expect: 1
67    }
68}