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//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
//TEST(compute):COMPARE_COMPUTE_EX:-slang -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;
typedef DifferentialPair<float> dpfloat;
float f(float x)
{
return x*x;
}
[ForwardDerivativeOf(f)]
DifferentialPair<float> df(DifferentialPair<float> x)
{
var primal = x.p * x.p;
var diff = 2 * x.p * x.d;
return DifferentialPair<float>(primal, diff);
}
[ForwardDifferentiable]
float g(float x)
{
return f(x);
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
{
{
dpfloat dpa = dpfloat(3.0, 1.0);
outputBuffer[0] = f(dpa.p); // Expect: 9.0
outputBuffer[1] = __fwd_diff(g)(dpa).d; // Expect: 6.0
}
}
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