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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 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
[ForwardDifferentiable]
float mySqr(float x)
{
return x * x;
}
[ForwardDifferentiable]
float f(float x)
{
return mySqr(x * x);
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
// Given f(x) = x^4,
// f''(x) = 12 * x^2
// Expect f''(4) = 192
float.Differential t = 2;
outputBuffer[0] = __fwd_diff(__fwd_diff(f))(
DifferentialPair<DifferentialPair<float>>(
DifferentialPair<float>(4.0, 1.0), DifferentialPair<float>(1.0, 0.0))) .d.d;
// sin''(x) = cos'(x) = -sin(x).
// Expect sin''(Pi/2) = -1.
outputBuffer[1] = __fwd_diff(__fwd_diff(sin))(
DifferentialPair<DifferentialPair<float>>(
DifferentialPair<float>(float.getPi()/2, 1.0), DifferentialPair<float>(1.0, 0.0))).d.d;
}
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