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// Test calling differentiable function through dynamic dispatch.
//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 0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
[anyValueSize(16)]
interface IInterface : IDifferentiable
{
[Differentiable]
float calc(float x);
}
struct A : IInterface
{
float data1;
[Differentiable]
__init(float data1) { this.data1 = data1; }
[Differentiable]
float calc(float x) { return x * x * x * data1; }
};
struct B : IInterface
{
float data1;
float data2;
[Differentiable]
__init(float data1, float data2) { this.data1 = data1; this.data2 = data2; }
[Differentiable]
float calc(float x) { return x * x * data1 * data2; }
};
[Differentiable]
float doThing(IInterface obj, float x)
{
return obj.calc(x);
}
[Differentiable]
float f(uint id, float x)
{
IInterface obj;
if (id == 0)
obj = A(x); // x^4
else
obj = B(x, x); // x^4
return doThing(obj, x) + doThing(obj, x); // 2 * x^4
}
//TEST_INPUT: type_conformance A:IInterface = 0
//TEST_INPUT: type_conformance B:IInterface = 1
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
{
var dpx = diffPair(1.0);
bwd_diff(f)(dispatchThreadID.x, dpx, 2.0);
outputBuffer[0] = dpx.d; // Expect: 2 * 4 * x^3 * dx = 8 * x^3 * dx = 16
}
{
var dpx = diffPair(1.5);
bwd_diff(f)(dispatchThreadID.x + 1, dpx, 1.0);
outputBuffer[1] = dpx.d; // Expect: 2 * 4 * x^3 * dx = 8 * (1.5)^3 * 1.0 = 27
}
}
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