yum-mirror/slang

Making it easier to work with shaders

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

Yong HeAdd support for `[PrimalSubstitute]` and `[PrimalSubstituteOf]`. (#2691)86fc50c50

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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:-cpu -compute -output-using-type -shaderobj
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8float original(float x)
9{
10    return x * x;
11}
12
13[PrimalSubstituteOf(original)]
14[BackwardDifferentiable]
15float primalSubst(float x)
16{
17    return 2.0f * x * x;
18}
19
20[BackwardDifferentiable]
21float caller(float x)
22{
23    return original(x);
24}
25
26[numthreads(1, 1, 1)]
27void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
28{
29    var a = diffPair(3.0, 1.0);
30    __bwd_diff(caller)(a, 1.0);
31    outputBuffer[0] = a.d;                                      // Expect: 12.0
32    outputBuffer[1] = __fwd_diff(caller)(diffPair(3.0, 1.0)).p; // Expect: 18.0
33    outputBuffer[2] = caller(3.0); // Expect: 9.0
34}