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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 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
typedef DifferentialPair<float> dpfloat;
typedef float.Differential dfloat;
[BackwardDifferentiable]
float f(float x)
{
float k = x > 1e-8 ? atan2(x, x) : 0.0;
return k;
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
{
dpfloat dpa = diffPair(2.0);
__bwd_diff(f)(dpa, 1.0);
outputBuffer[0] = dpa.d; // Expect: 0.0
}
{
dpfloat dpa = diffPair(0.0,);
__bwd_diff(f)(dpa, 1.0);
outputBuffer[1] = dpa.d; // Expect: 0.0, but if select is not turned into if-else,
// this will be 'inf' or 'nan'
}
}
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