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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], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
typedef DifferentialPair<float> dpfloat;
typedef DifferentialPair<float2> dpfloat2;
[BackwardDifferentiable]
float diffLog(float x)
{
return log(x);
}
[BackwardDifferentiable]
float2 diffLog(float2 x)
{
return log(x);
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
{
{
dpfloat dpa = dpfloat(10.0, 0.0);
__bwd_diff(diffLog)(dpa, 3.0);
outputBuffer[0] = dpa.d; // Expect: 0.300000
}
{
dpfloat2 dpx = dpfloat2(float2(2.0, 5.0), float2(0.0, 0.0));
__bwd_diff(diffLog)(dpx, float2(1.0, 1.0));
outputBuffer[1] = dpx.d[0]; // Expect: 0.500000
outputBuffer[2] = dpx.d[1]; // Expect: 0.200000
}
}
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