yum-mirror/slang

Making it easier to work with shaders

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

Yong HeReuse higher-order `ResolveInvoke` logic to resolve func refs in `[*DerivativeOf]` attribs. (#2688)257733f32

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1//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
2//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
3//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8typedef DifferentialPair<float> dpfloat;
9typedef DifferentialPair<float2> dpfloat2;
10typedef DifferentialPair<float3> dpfloat3;
11
12[BackwardDifferentiable]
13float diffExp(float x)
14{
15    return exp(x);
16}
17
18[BackwardDifferentiable]
19float diffSin(float x)
20{
21    return sin(x);
22}
23
24[numthreads(1, 1, 1)]
25void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
26{
27    {
28        dpfloat dpx = dpfloat(2.0, 1.0);
29        __bwd_diff(diffExp)(dpx, 1.0);
30        outputBuffer[0] = dpx.p; // Expect: 2
31        outputBuffer[1] = dpx.d; // Expect: 7.389056
32    }
33
34    {
35        dpfloat dpx = dpfloat(0.0, 1.0);
36        __bwd_diff(diffExp)(dpx, 1.0);
37        outputBuffer[2] = dpx.p; // Expect: 0.000000
38        outputBuffer[3] = dpx.d; // Expect: 1.000000
39    }
40
41    {
42        dpfloat dpx = dpfloat(float.getPi(), 1.0);
43        __bwd_diff(diffSin)(dpx, 1.0);
44        outputBuffer[4] = dpx.d; // Expect: -1.000000
45    }
46
47    {
48        dpfloat dpx = dpfloat(float.getPi() / 3.0, 1.0);
49        __bwd_diff(sincos)(dpx, 1.0, 0.0);
50        outputBuffer[5] = dpx.d; // Expect: 0.5
51        __bwd_diff(sincos)(dpx, 0.0, 1.0);
52        outputBuffer[6] = dpx.d; // Expect: -0.8660254
53        __bwd_diff(sincos)(dpx, 1.0, 1.0);
54        outputBuffer[7] = dpx.d; // Expect: -0.3660254
55    }
56}