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//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute -shaderobj -output-using-type
//TEST_INPUT:ubuffer(data=[0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
interface IFoo
{
[BackwardDifferentiable]
float3 test(float v, uint offset);
}
struct A : IFoo
{
float x;
float3 f(float v, uint offset)
{
return v * v;
}
// Provide a backward diff, but leave out forward diff.
[BackwardDerivativeOf(f)]
[TreatAsDifferentiable]
void diff_f(inout DifferentialPair<float> v, uint offset, float3 dOut)
{
v = diffPair(v.p, 2 * v.p * dOut.x);
}
[BackwardDifferentiable]
float3 test(float v, uint offset)
{
return f(v, 0);
}
}
[BackwardDifferentiable]
float3 test(IFoo obj, float v)
{
return obj.test(v, 0);
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
A a = {0.0};
var p = diffPair(3.0, 0.0);
let rs = __bwd_diff(test)(a, p, 1.0);
outputBuffer[0] = p.d;
}
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