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//TEST(compute):COMPARE_COMPUTE_EX(filecheck-buffer=CHECK): -slang -compute -shaderobj -output-using-type
//TEST(compute):COMPARE_COMPUTE_EX(filecheck-buffer=CHECK):-cuda -compute -shaderobj -output-using-type
//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
[BackwardDerivative(set_bwd)]
void set(uint idx, float x)
{
outputBuffer[idx] = x;
}
void set_bwd(uint idx, inout DifferentialPair<float> x)
{
// For debugging, we'll set the derivative to 1.0
x = DifferentialPair<float>(x.p, 1.0f);
}
[Differentiable]
void run(
uint idx,
float x)
{
if (idx >= 1) return;
if (idx == 0)
{ }
for (int i = 0; i < 1; i++)
{
if (idx > 0)
{
return;
}
if (idx == 0)
{
x = x * 2.0f;
}
}
if (idx == 0)
{ }
set(idx, x);
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
// bwd_diff
DifferentialPair<float> dpa = DifferentialPair<float>(1.0, 0.0);
bwd_diff(run)(dispatchThreadID.x, dpa);
outputBuffer[dispatchThreadID.x] = dpa.d;
// CHECK: type: float
// CHECK: 2.0
}
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