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// Test calling backward differentiable function through dynamic dispatch, where the interface
// being dispatched inherits from IDifferentiable, so that `this` is differentiable.
//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj -output-using-type
//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
[anyValueSize(16)]
interface IInterface : IDifferentiable
{
[BackwardDifferentiable]
float calc(float x);
}
struct C : IInterface
{
[BackwardDifferentiable]
float calc(float x) { return 2 * x; }
}
struct A : IInterface
{
float a;
[BackwardDifferentiable]
float calc(float x)
{
return a * x * x;
}
};
[BackwardDifferentiable]
float run(int id, float x, no_diff float y)
{
IInterface obj = createDynamicObject<IInterface>(id, y);
C c = {};
return obj.calc(x);
}
//TEST_INPUT: type_conformance A:IInterface = 0
//TEST_INPUT: type_conformance C:IInterface = 1
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
{
var p = diffPair(3.0);
__bwd_diff(run)(0, p, 0.5, 1.0f);
outputBuffer[0] = p.d; // A.calc, expect 3
}
{
var p = diffPair(3.0);
__bwd_diff(run)(1, p, 1.5, 1.0f);
outputBuffer[1] = p.d; // c.calc, expect 2
}
}
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